Removed ununsed injector

Thanks Sjmarf!

Readme.md

@@ -16,3 +16,6 @@ It should be automatically included when pulling the full mod.
 
 XZ for Java (data compression)\
 https://tukaani.org/xz/java.html
+
+Toml for Java (config handeling)\
+https://github.com/TheElectronWill/night-config

_wiki-files/TestDiagram.drawio

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_wiki-files/a1.6_Flow_Diagram_Overview.drawio

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+        <mxCell id="bW8zysbPbXfA33rAzGtO-28" value="" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFF4E8;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-26">
+          <mxGeometry y="45" width="200" height="130" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-29" value="Config GUI" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFD7B0;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-26">
+          <mxGeometry x="10" y="115" width="180" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-30" value="Config File" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFD7B0;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-26">
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+        <mxCell id="bW8zysbPbXfA33rAzGtO-38" value="" style="group" vertex="1" connectable="0" parent="1">
+          <mxGeometry x="900" y="165" width="200" height="175" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-39" value="Rendering" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#ffe6cc;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-38">
+          <mxGeometry width="200" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-40" value="" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFF4E8;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-38">
+          <mxGeometry y="45" width="200" height="130" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-41" value="Cloud Rendering" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFD7B0;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-38">
+          <mxGeometry x="10" y="115" width="180" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-42" value="LOD Rendering" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFD7B0;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-38">
+          <mxGeometry x="10" y="60" width="180" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-47" value="" style="group" vertex="1" connectable="0" parent="1">
+          <mxGeometry x="900" y="419" width="200" height="175" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-32" value="Mod Support" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#ffe6cc;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-47">
+          <mxGeometry width="200" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-33" value="" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFF4E8;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-47">
+          <mxGeometry y="45" width="200" height="130" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-34" value="Mod API" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFD7B0;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-47">
+          <mxGeometry x="10" y="115" width="180" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-35" value="&lt;div&gt;Mod Accessors&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;labelBackgroundColor=none;fillColor=#FFD7B0;strokeColor=#d79b00;" vertex="1" parent="bW8zysbPbXfA33rAzGtO-47">
+          <mxGeometry x="10" y="60" width="180" height="45" as="geometry" />
+        </mxCell>
+        <mxCell id="bW8zysbPbXfA33rAzGtO-20" value="" style="shape=flexArrow;endArrow=classic;html=1;rounded=0;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="XNAtI1EKQKx7pIlif8ke-55" target="bW8zysbPbXfA33rAzGtO-16">
+          <mxGeometry width="50" height="50" relative="1" as="geometry">
+            <mxPoint x="410" y="-36" as="sourcePoint" />
+            <mxPoint x="360" y="-86" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>

_wiki-files/class_diagram.drawio

@@ -0,0 +1 @@
+<mxfile host="app.diagrams.net" modified="2022-01-04T16:15:44.618Z" agent="5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36 Edg/96.0.1054.62" etag="-Vdo5wDmcYQvA_9MRiBE" version="16.0.0" type="google"><diagram id="C5RBs43oDa-KdzZeNtuy" name="Page-1">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</diagram></mxfile>

build.gradle

@@ -0,0 +1,37 @@
+plugins {
+    id "com.github.johnrengelman.shadow" version "7.1.0"
+}
+
+configurations {
+    common
+    shadowMe
+    implementation.extendsFrom shadowMe
+}
+
+dependencies {
+    // Toml
+    shadowMe("com.electronwill.night-config:toml:${rootProject.toml_version}") {}
+
+    // Compression
+    common('org.tukaani:xz:1.9')
+    common('org.apache.commons:commons-compress:1.21')
+    shadowMe 'org.tukaani:xz:1.9'
+    shadowMe 'org.apache.commons:commons-compress:1.21'
+}
+
+shadowJar {
+    configurations = [project.configurations.shadowMe]
+    relocate 'org.tukaani', 'shaded.tukaani'
+    relocate 'org.apache.commons.compress', 'shaded.apache.commons.compress'
+    relocate 'com.electronwill.nightconfig', 'shaded.electronwill.nightconfig'
+
+    relocate 'com.seibel.lod.common', 'fabric.com.seibel.lod.common'
+
+    classifier "dev-shadow"
+}
+
+//remapJar {
+//    input.set shadowJar.archiveFile
+//    dependsOn shadowJar
+//    classifier null
+//}

src/main/java/com/seibel/lod/core/JarMain.java

@@ -0,0 +1,26 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core;
+
+public class JarMain {
+    public static void main(String[] args){
+        System.out.println("Why are you running the jar, this isn't done yet  >:(");
+    }
+}

src/main/java/com/seibel/lod/core/ModInfo.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -18,7 +18,6 @@
  */
 
 package com.seibel.lod.core;
-
 /**
  * This file is similar to mcmod.info
  * <br>
@@ -28,15 +27,18 @@ package com.seibel.lod.core;
  * Pretty much all of the mod stems from there.
  * 
  * @author James Seibel
+ * @author Ran
  * @version 11-29-2021
  */
 public final class ModInfo
 {
 	public static final String ID = "lod";
+	/** The internal protocol version used for networking */
+	public static final int PROTOCOL_VERSION = 1;
 	/** The internal mod name */
 	public static final String NAME = "DistantHorizons";
 	/** Human readable version of NAME */
 	public static final String READABLE_NAME = "Distant Horizons";
 	public static final String API = "LodAPI";
-	public static final String VERSION = "a1.5.4";
-}
+	public static final String VERSION = "1.6.12a";
+}

src/main/java/com/seibel/lod/core/api/ApiShared.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,9 +19,12 @@
 
 package com.seibel.lod.core.api;
 
-import com.seibel.lod.core.builders.bufferBuilding.LodBufferBuilderFactory;
+import com.seibel.lod.core.ModInfo;
 import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
+import com.seibel.lod.core.enums.config.VerticalQuality;
 import com.seibel.lod.core.objects.lod.LodWorld;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 /**
  * This stores objects and variables that
@@ -32,9 +35,9 @@ import com.seibel.lod.core.objects.lod.LodWorld;
  */
 public class ApiShared
 {
+	public static final Logger LOGGER = LogManager.getLogger(ModInfo.NAME);
 	public ApiShared INSTANCE = new ApiShared();
 	
-	public static final LodBufferBuilderFactory lodBufferBuilderFactory = new LodBufferBuilderFactory();
 	public static final LodWorld lodWorld = new LodWorld();
 	public static final LodBuilder lodBuilder = new LodBuilder();
 	
@@ -42,12 +45,14 @@ public class ApiShared
 	public static int previousChunkRenderDistance = 0;
 	/** Used to determine if the LODs should be regenerated */
 	public static int previousLodRenderDistance = 0;
+	public static VerticalQuality previousVertQual = null;
 	
-	
-	
+	/** Signal whether a world is shutting down */
+	public static volatile boolean isShuttingDown = false;
+
 	private ApiShared()
 	{
-		
+
 	}
 	
 }

src/main/java/com/seibel/lod/core/api/ClientApi.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,20 +19,37 @@
 
 package com.seibel.lod.core.api;
 
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
+import java.time.Duration;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+
+import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
+import com.seibel.lod.core.enums.rendering.RendererType;
+import com.seibel.lod.core.logging.ConfigBasedLogger;
+import com.seibel.lod.core.logging.ConfigBasedSpamLogger;
+import com.seibel.lod.core.render.RenderSystemTest;
+import com.seibel.lod.core.wrapperInterfaces.chunk.AbstractChunkPosWrapper;
+import org.apache.logging.log4j.Level;
+import com.seibel.lod.core.handlers.LodDimensionFinder;
+import org.lwjgl.glfw.GLFW;
 
 import com.seibel.lod.core.ModInfo;
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodBufferBuilderFactory;
+import com.seibel.lod.core.enums.config.DistanceGenerationMode;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
 import com.seibel.lod.core.objects.lod.LodDimension;
 import com.seibel.lod.core.objects.math.Mat4f;
 import com.seibel.lod.core.render.GLProxy;
 import com.seibel.lod.core.render.LodRenderer;
 import com.seibel.lod.core.util.DetailDistanceUtil;
-import com.seibel.lod.core.util.SingletonHandler;
+import com.seibel.lod.core.logging.SpamReducedLogger;
+import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
+import com.seibel.lod.core.wrapperInterfaces.chunk.IChunkWrapper;
 import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
 import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftRenderWrapper;
-import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.lod.core.wrapperInterfaces.minecraft.IProfilerWrapper;
+import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
 
 /**
  * This holds the methods that should be called
@@ -40,19 +57,43 @@ import com.seibel.lod.core.wrapperInterfaces.minecraft.IProfilerWrapper;
  * Specifically for the client.
  * 
  * @author James Seibel
- * @version 12-8-2021
+ * @version 2022-3-26
  */
 public class ClientApi
-{
+{	
+	public static boolean prefLoggerEnabled = false;
+	
 	public static final ClientApi INSTANCE = new ClientApi();
-	public static final Logger LOGGER = LogManager.getLogger(ModInfo.NAME);
+
+	public static final LodBufferBuilderFactory lodBufferBuilderFactory = new LodBufferBuilderFactory();
+	public static LodRenderer renderer = new LodRenderer(lodBufferBuilderFactory);
+	public static RenderSystemTest testRenderer = new RenderSystemTest();
 	
-	public static LodRenderer renderer = new LodRenderer(ApiShared.lodBufferBuilderFactory);
-	
-	private static final IMinecraftWrapper MC = SingletonHandler.get(IMinecraftWrapper.class);
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
 	private static final IMinecraftRenderWrapper MC_RENDER = SingletonHandler.get(IMinecraftRenderWrapper.class);
 	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	private static final IWrapperFactory FACTORY = SingletonHandler.get(IWrapperFactory.class);
 	private static final EventApi EVENT_API = EventApi.INSTANCE;
+
+	public static final boolean ENABLE_LAG_SPIKE_LOGGING = false;
+	public static final long LAG_SPIKE_THRESOLD_NS = TimeUnit.NANOSECONDS.convert(16, TimeUnit.MILLISECONDS);
+	
+	public static final long SPAM_LOGGER_FLUSH_NS = TimeUnit.NANOSECONDS.convert(1, TimeUnit.SECONDS);
+	
+	public static LodDimensionFinder DIMENSION_FINDER = new LodDimensionFinder();;
+	
+	public static class LagSpikeCatcher {
+
+		long timer = System.nanoTime();
+		public LagSpikeCatcher() {}
+		public void end(String source) {
+			if (!ENABLE_LAG_SPIKE_LOGGING) return;
+			timer = System.nanoTime() - timer;
+			if (timer > LAG_SPIKE_THRESOLD_NS) {
+				ApiShared.LOGGER.info("LagSpikeCatcher: "+source+" took "+Duration.ofNanos(timer)+"!");
+			}
+		}
+	}
 	
 	/**
 	 * there is some setup that should only happen once,
@@ -62,48 +103,161 @@ public class ClientApi
 	private boolean configOverrideReminderPrinted = false;
 	
 	public boolean rendererDisabledBecauseOfExceptions = false;
+
+	
+	
+	
+	
 	
 	
 	private ClientApi()
 	{
 		
 	}
+
+	public static void logToChat(Level logLevel, String str) {
+		String prefix = "["+ModInfo.READABLE_NAME+"] ";
+		if (logLevel == Level.ERROR) {
+			prefix += "\u00A74";
+		} else if (logLevel == Level.WARN) {
+			prefix += "\u00A76";
+		} else if (logLevel == Level.INFO) {
+			prefix += "\u00A7f";
+		} else if (logLevel == Level.DEBUG) {
+			prefix += "\u00A77";
+		} else if (logLevel == Level.TRACE) {
+			prefix += "\u00A78";
+		} else {
+			prefix += "\u00A7f";
+		}
+		prefix += "\u00A7l\u00A7u";
+		prefix += logLevel.name();
+		prefix += ":\u00A7r ";
+		if (MC != null) MC.sendChatMessage(prefix + str);
+	}
+
+	private final ConcurrentHashMap.KeySetView<Long,Boolean> generating = ConcurrentHashMap.newKeySet();
+	public final ConcurrentHashMap.KeySetView<Long,Boolean> toBeLoaded = ConcurrentHashMap.newKeySet();
 	
-	
-	
+	public void clientChunkLoadEvent(IChunkWrapper chunk, IWorldWrapper world)
+	{
+		LagSpikeCatcher clientChunkLoad = new LagSpikeCatcher();
+		//ApiShared.LOGGER.info("Lod Generating add: "+chunk.getLongChunkPos());
+		toBeLoaded.add(chunk.getLongChunkPos());
+		clientChunkLoad.end("clientChunkLoad");
+	}
+
+	private long lastFlush = 0;
 	
 	public void renderLods(Mat4f mcModelViewMatrix, Mat4f mcProjectionMatrix, float partialTicks)
 	{
 		// comment out when creating a release
-		applyConfigOverrides();
-		
+		//applyConfigOverrides();
+
 		// clear any out of date objects
 		MC.clearFrameObjectCache();
 		
 		try
 		{
+			boolean doFlush = System.nanoTime() - lastFlush >= SPAM_LOGGER_FLUSH_NS;
+			if (doFlush) {
+				lastFlush = System.nanoTime();
+				SpamReducedLogger.flushAll();
+			}
+			ConfigBasedLogger.updateAll();
+			ConfigBasedSpamLogger.updateAll(doFlush);
+
+			if (ApiShared.previousVertQual != CONFIG.client().graphics().quality().getVerticalQuality()) {
+				ApiShared.previousVertQual = CONFIG.client().graphics().quality().getVerticalQuality();
+				EventApi.INSTANCE.worldUnloadEvent(MC.getWrappedServerWorld());
+				EventApi.INSTANCE.worldLoadEvent(MC.getWrappedClientWorld());
+				return;
+			}
+			
 			// only run the first time setup once
 			if (!firstTimeSetupComplete)
 				firstFrameSetup();
-			
-			
+
 			if (!MC.playerExists() || ApiShared.lodWorld.getIsWorldNotLoaded())
 				return;
 			
-			LodDimension lodDim = ApiShared.lodWorld.getLodDimension(MC.getCurrentDimension());
-			if (lodDim == null)
+			IWorldWrapper world = MC.getWrappedClientWorld();
+			if (world == null)
 				return;
+			LodDimension lodDim = ApiShared.lodWorld.getLodDimension(world.getDimensionType());
 			
+			// Make sure the player's data is up-to-date
+			DIMENSION_FINDER.updatePlayerData();
+			
+			// Make the LodDim if it does not exist
+			if (lodDim == null)
+			{
+				if (DIMENSION_FINDER.isDone())
+				{
+					lodDim = DIMENSION_FINDER.getAndClearFoundLodDimension();
+					ApiShared.lodWorld.addLodDimension(lodDim);
+				}
+				else
+				{
+					DIMENSION_FINDER.AttemptToDetermineSubDimensionAsync(MC.getCurrentDimension());
+					return;
+				}
+			}
+			
+			if (prefLoggerEnabled) {
+				lodDim.dumpRamUsage();
+				lodBufferBuilderFactory.dumpBufferMemoryUsage();
+			}
+
+			LagSpikeCatcher updateToBeLoadedChunk = new LagSpikeCatcher();
+			for (long pos : toBeLoaded) {
+				if (generating.size() >= 1) {
+					//ApiShared.LOGGER.info("Lod Generating Full! Remining: "+toBeLoaded.size());
+					break;
+				}
+				IChunkWrapper chunk = world.tryGetChunk(FACTORY.createChunkPos(pos));
+				if (chunk == null) {
+					toBeLoaded.remove(pos);
+					LodBuilder.EVENT_LOGGER.debug("Manual Chunk: {} not ready. Remaining queue: {}", FACTORY.createChunkPos(pos), toBeLoaded.size());
+					continue;
+				}
+				if (!chunk.isLightCorrect()) continue;
+				if (!chunk.doesNearbyChunksExist()) continue;
+				toBeLoaded.remove(pos);
+				generating.add(pos);
+				//ApiShared.LOGGER.info("Lod Generation trying "+pos+". Remining: " +toBeLoaded.size());
+				ApiShared.lodBuilder.generateLodNodeAsync(chunk, ApiShared.lodWorld,
+						world.getDimensionType(), DistanceGenerationMode.FULL, true, true, () -> {
+							generating.remove(pos);
+							LodBuilder.EVENT_LOGGER.debug("Manual Chunk: {} done. Remaining queue: {}", FACTORY.createChunkPos(pos), toBeLoaded.size());
+						}, () -> {
+							generating.remove(pos);
+							toBeLoaded.add(pos);
+							LodBuilder.EVENT_LOGGER.debug("Manual Chunk: {} not ready. Remaining queue: {}", FACTORY.createChunkPos(pos), toBeLoaded.size());
+						});
+			}
+			updateToBeLoadedChunk.end("updateToBeLoadedChunk");
+			
+			
+			
+			LagSpikeCatcher updateSettings = new LagSpikeCatcher();
 			DetailDistanceUtil.updateSettings();
 			EVENT_API.viewDistanceChangedEvent();
+			updateSettings.end("updateSettings");
+			LagSpikeCatcher updatePlayerMove = new LagSpikeCatcher();
 			EVENT_API.playerMoveEvent(lodDim);
+			updatePlayerMove.end("updatePlayerMove");
 			
+			
+
+			LagSpikeCatcher cutAndExpendAsync = new LagSpikeCatcher();
 			lodDim.cutRegionNodesAsync(MC.getPlayerBlockPos().getX(), MC.getPlayerBlockPos().getZ());
 			lodDim.expandOrLoadRegionsAsync(MC.getPlayerBlockPos().getX(), MC.getPlayerBlockPos().getZ());
+			cutAndExpendAsync.end("cutAndExpendAsync");
 			
 			
 			
-			if (CONFIG.client().advanced().debugging().getDrawLods())
+			if (CONFIG.client().advanced().debugging().getRendererType() == RendererType.DEFAULT)
 			{
 				// Note to self:
 				// if "unspecified" shows up in the pie chart, it is
@@ -118,18 +272,26 @@ public class ClientApi
 						ClientApi.renderer.drawLODs(lodDim, mcModelViewMatrix, mcProjectionMatrix, partialTicks, MC.getProfiler());
 					} catch (RuntimeException e) {
 						rendererDisabledBecauseOfExceptions = true;
+						ApiShared.LOGGER.error("Renderer thrown an uncaught exception: ",e);
 						try {
-							//ClientApi.renderer.ma  ();
-						} catch (RuntimeException welpLookLikeWeWillLeakResource) {}
-						throw e;
+							MC.sendChatMessage("\u00A74\u00A7l\u00A7uERROR: Distant Horizons"
+									+ " renderer has encountered an exception!");
+							MC.sendChatMessage("\u00A74Renderer is now disabled to prevent futher issues.");
+							MC.sendChatMessage("\u00A74Exception detail: "+e.toString());
+						} catch (RuntimeException ignored) {}
 					}
 				}
 				profiler.pop(); // end LOD
 				profiler.push("terrain"); // go back into "terrain"
+			} else if (CONFIG.client().advanced().debugging().getRendererType() == RendererType.DEBUG) {
+				IProfilerWrapper profiler = MC.getProfiler();
+				profiler.pop(); // get out of "terrain"
+				profiler.push("LODTestRendering");
+				ClientApi.testRenderer.render();
+				profiler.pop(); // end LODTestRendering
+				profiler.push("terrain"); // go back into "terrain"
 			}
-			
-			
-			
+
 			// these can't be set until after the buffers are built (in renderer.drawLODs)
 			// otherwise the buffers may be set to the wrong size, or not changed at all
 			ApiShared.previousChunkRenderDistance = MC_RENDER.getRenderDistance();
@@ -137,8 +299,7 @@ public class ClientApi
 		}
 		catch (Exception e)
 		{
-			ClientApi.LOGGER.error("client proxy: " + e.getMessage());
-			e.printStackTrace();
+			ApiShared.LOGGER.error("client proxy uncaught exception: ", e);
 		}
 	}
 	
@@ -149,10 +310,7 @@ public class ClientApi
 		if (!configOverrideReminderPrinted)
 		{
 			MC.sendChatMessage(ModInfo.READABLE_NAME + " experimental build " + ModInfo.VERSION);
-			MC.sendChatMessage("You are running a unsupported version of the mod!");
-			MC.sendChatMessage("==========================================");
-			MC.sendChatMessage("SEIZURE WARNING: Flashing lights expected!"); // remove this line when the lighting shaders are fixed
-			MC.sendChatMessage("==========================================");
+			MC.sendChatMessage("You are running an unsupported version of the mod!");
 			MC.sendChatMessage("Here be dragons!");
 			
 			configOverrideReminderPrinted = true;
@@ -171,10 +329,35 @@ public class ClientApi
 		
 //		CONFIG.client().advanced().buffers().setRebuildTimes(BufferRebuildTimes.FREQUENT);
 		
-		
-		CONFIG.client().advanced().debugging().setDebugKeybindingsEnabled(true);
+//		CONFIG.client().advanced().debugging().setDebugKeybindingsEnabled(true);
+	}
+
+	//=================//
+	//    DUBUG USE    //
+	//=================//
+	// Trigger once on key press, with CLIENT PLAYER.
+	public void keyPressedEvent(int glfwKey) {
+
+		if (!CONFIG.client().advanced().debugging().getDebugKeybindingsEnabled()) return;
+
+		if (glfwKey == GLFW.GLFW_KEY_F8) {
+					CONFIG.client().advanced().debugging()
+					.setDebugMode(CONFIG.client().advanced().debugging().getDebugMode().getNext());
+			MC.sendChatMessage("F8: Set debug mode to " + CONFIG.client().advanced().debugging().getDebugMode());
+		}
+		
+		if (glfwKey == GLFW.GLFW_KEY_F6) {
+			CONFIG.client().advanced().debugging()
+					.setRendererType(RendererType.next(CONFIG.client().advanced().debugging().getRendererType()));
+			MC.sendChatMessage("F6: Set rendering to " + CONFIG.client().advanced().debugging().getRendererType());
+		}
+
+		if (glfwKey == GLFW.GLFW_KEY_P) {
+			prefLoggerEnabled = !prefLoggerEnabled;
+			MC.sendChatMessage("P: Debug Pref Logger is " + (prefLoggerEnabled ? "enabled" : "disabled"));
+		}
+		
 	}
-	
 	
 	
 	

src/main/java/com/seibel/lod/core/api/EventApi.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,203 +19,206 @@
 
 package com.seibel.lod.core.api;
 
-import org.lwjgl.glfw.GLFW;
-
+import com.seibel.lod.core.api.ClientApi.LagSpikeCatcher;
 import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
-import com.seibel.lod.core.builders.worldGeneration.LodWorldGenerator;
-import com.seibel.lod.core.enums.config.DistanceGenerationMode;
+import com.seibel.lod.core.builders.worldGeneration.BatchGenerator;
+import com.seibel.lod.core.enums.WorldType;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
 import com.seibel.lod.core.objects.lod.LodDimension;
 import com.seibel.lod.core.objects.lod.RegionPos;
+import com.seibel.lod.core.render.GLProxy;
 import com.seibel.lod.core.render.LodRenderer;
-import com.seibel.lod.core.util.DataPointUtil;
 import com.seibel.lod.core.util.DetailDistanceUtil;
 import com.seibel.lod.core.util.LodUtil;
-import com.seibel.lod.core.util.SingletonHandler;
-import com.seibel.lod.core.util.ThreadMapUtil;
+import com.seibel.lod.core.wrapperInterfaces.IVersionConstants;
 import com.seibel.lod.core.wrapperInterfaces.chunk.IChunkWrapper;
 import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
-import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.lod.core.wrapperInterfaces.world.IDimensionTypeWrapper;
 import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
 
 /**
- * This holds the methods that should be called
- * by the host mod loader (Fabric, Forge, etc.).
- * Specifically server and client events.
- * 
+ * This holds the methods that should be called by the host mod loader (Fabric,
+ * Forge, etc.). Specifically server and client events.
  * @author James Seibel
  * @version 11-12-2021
  */
 public class EventApi
 {
+	public static final boolean ENABLE_STACK_DUMP_LOGGING = false;
 	public static final EventApi INSTANCE = new EventApi();
 	
-	private static final IMinecraftWrapper MC = SingletonHandler.get(IMinecraftWrapper.class);
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
 	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	private static final IVersionConstants VERSION_CONSTANTS = SingletonHandler.get(IVersionConstants.class);
 	
 	/**
-	 * can be set if we want to recalculate variables related
-	 * to the LOD view distance
+	 * can be set if we want to recalculate variables related to the LOD view
+	 * distance
 	 */
 	private boolean recalculateWidths = false;
 	
+	private boolean isCurrentlyOnSinglePlayerServer = false;
+	
 	
 	private EventApi()
 	{
-		
+	
 	}
 	
-	
-	
-	
-	//=============//
+	// =============//
 	// tick events //
-	//=============//
-	
+	// =============//
+	public BatchGenerator batchGenerator = null;
+
+	private int lastWorldGenTickDelta = 0;
 	public void serverTickEvent()
 	{
+		lastWorldGenTickDelta--;
 		if (!MC.playerExists() || ApiShared.lodWorld.getIsWorldNotLoaded())
 			return;
 		
 		LodDimension lodDim = ApiShared.lodWorld.getLodDimension(MC.getCurrentDimension());
 		if (lodDim == null)
 			return;
-		
-		// FIXME: This is in server thread. We shouldn't be accessing the client's renderer!
-		LodWorldGenerator.INSTANCE.queueGenerationRequests(lodDim, ApiShared.lodBuilder);
+		if (ApiShared.isShuttingDown)
+			return;
+
+		if (CONFIG.client().worldGenerator().getEnableDistantGeneration())
+		{
+			if (lastWorldGenTickDelta <= 0) {
+				lastWorldGenTickDelta = 20; // 20 ticks is 1 second. We don't need to refresh world gen status every tick.
+				try {
+					if (batchGenerator == null)
+						batchGenerator = new BatchGenerator(ApiShared.lodBuilder, lodDim);
+					batchGenerator.queueGenerationRequests(lodDim, ApiShared.lodBuilder);
+				} catch (Exception e) {
+					// Exception may happen if world got unloaded unorderly
+					e.printStackTrace();
+				}
+			}
+		}
+		else
+		{
+			if (batchGenerator != null)
+			{
+				batchGenerator.stop(false);
+				batchGenerator = null;
+			}
+		}
 	}
 	
-	
-	
-	
-	//==============//
+	// ==============//
 	// world events //
-	//==============//
-	
-	public void chunkLoadEvent(IChunkWrapper chunk, IDimensionTypeWrapper dimType)
-	{
-		ApiShared.lodBuilder.generateLodNodeAsync(chunk, ApiShared.lodWorld, dimType, DistanceGenerationMode.FULL);
-	}
+	// ==============//
 	
 	public void worldSaveEvent()
 	{
-		ApiShared.lodWorld.saveAllDimensions();
+		ApiShared.lodWorld.saveAllDimensions(false); // Do an async save.
 	}
 	
 	/** This is also called when a new dimension loads */
 	public void worldLoadEvent(IWorldWrapper world)
 	{
-		DataPointUtil.WORLD_HEIGHT = world.getHeight();
+		if (ENABLE_STACK_DUMP_LOGGING)
+			ApiShared.LOGGER.info(
+					"WorldLoadEvent called here for "
+							+ (world.getWorldType() == WorldType.ClientWorld ? "clientLevel" : "serverLevel"),
+					new RuntimeException());
+		// Always ignore ServerWorld event
+		if (world.getWorldType() == WorldType.ServerWorld)
+			return;
+		isCurrentlyOnSinglePlayerServer = MC.hasSinglePlayerServer();
+		if (!ApiShared.isShuttingDown) ApiShared.LOGGER.warn("WorldLoadEvent called on {} while another world is loaded!",
+				(world.getWorldType() == WorldType.ClientWorld ? "clientLevel" : "serverLevel"));
+		ApiShared.isShuttingDown = false;
+		//DataPointUtil.WORLD_HEIGHT = world.getHeight();
 		LodBuilder.MIN_WORLD_HEIGHT = world.getMinHeight(); // This updates the World height
 		
-		//LodNodeGenWorker.restartExecutorService();
-		//ThreadMapUtil.clearMaps();
+		// LodNodeGenWorker.restartExecutorService();
+		// ThreadMapUtil.clearMaps();
 		
 		// the player just loaded a new world/dimension
-		ApiShared.lodWorld.selectWorld(LodUtil.getWorldID(world));
+		String worldID = LodUtil.getWorldID(world);
+		ApiShared.LOGGER.info("Loading new world/dimension: {}",worldID);
+		ApiShared.lodWorld.selectWorld(worldID);
+		ApiShared.LOGGER.info("World/dimension loaded: {}",worldID);
 		
 		// make sure the correct LODs are being rendered
 		// (if this isn't done the previous world's LODs may be drawn)
 		ClientApi.renderer.regenerateLODsNextFrame();
+		ApiShared.previousVertQual = CONFIG.client().graphics().quality().getVerticalQuality();
 	}
 	
 	/** This is also called when the user disconnects from a server+ */
-	public void worldUnloadEvent()
+	public void worldUnloadEvent(IWorldWrapper world)
 	{
-		// the player just unloaded a world/dimension
-		ThreadMapUtil.clearMaps();
-		// ClientApi.renderer.markForCleanup();
-		// ClientApi.renderer.destroyBuffers();
+		if (ENABLE_STACK_DUMP_LOGGING)
+			ApiShared.LOGGER.info(
+					"WorldUnloadEvent called here for "
+							+ (world.getWorldType() == WorldType.ClientWorld ? "clientLevel" : "serverLevel"),
+					new RuntimeException());
 		
-		new Thread(() -> checkIfDisconnectedFromServer()).start();
-	}
-	private void checkIfDisconnectedFromServer()
-	{
-		try
-		{
-			// world unloading events are called before disconnecting from the server,
-			// so we need to wait a second for MC to disconnect 
-			Thread.sleep(1000);
-		}
-		catch (InterruptedException e)
-		{
-			// this should never happen, but just in case
-			e.printStackTrace();
-		}
+		// If it's single player, ignore the client side world unload event
+		// Note: using isCurrentlyOnSinglePlayerServer as often API call unload event
+		// AFTER setting MC to not be in a singlePlayerServer
+		if (isCurrentlyOnSinglePlayerServer && world.getWorldType() == WorldType.ClientWorld)
+			return;
+
+		// if this isn't done unfinished tasks may be left in the queue
+		// preventing new LodChunks form being generated
+		if (ApiShared.isShuttingDown) return; // Don't do this if we're already shutting down
+		ApiShared.isShuttingDown = true;
 		
+		// TODO Better report on when world gen is stuck and timeout
+		if (batchGenerator != null)
+			batchGenerator.stop(true);
+		batchGenerator = null;
 		
-		if (MC.getWrappedClientWorld() == null || (!MC.connectedToServer() && !MC.hasSinglePlayerServer()))
-		{
-			// the player just left the server
-			
-			// TODO should "resetMod()" be called here? -James
-			
-			// if this isn't done unfinished tasks may be left in the queue
-			// preventing new LodChunks form being generated
-			LodWorldGenerator.INSTANCE.restartExecutorService();
-			
-			LodWorldGenerator.INSTANCE.numberOfChunksWaitingToGenerate.set(0);
-			ApiShared.lodWorld.deselectWorld();
-			
-			
-			// prevent issues related to the buffer builder
-			// breaking or retaining previous data when changing worlds.
-			ClientApi.renderer.destroyBuffers();
-			ClientApi.renderer.requestCleanup();
-			recalculateWidths = true;
-			// TODO: Check if after the refactoring, is this still needed
-			ClientApi.renderer = new LodRenderer(ApiShared.lodBufferBuilderFactory);
-			ClientApi.INSTANCE.rendererDisabledBecauseOfExceptions = false;
-			
-			// make sure the nulled objects are freed.
-			// (this prevents an out of memory error when
-			// changing worlds)
-			System.gc();
-		}
+		ApiShared.lodWorld.deselectWorld(); // This force a save and shutdown lodDim properly
+		
+		// prevent issues related to the buffer builder
+		// breaking or retaining previous data when changing worlds.
+		ClientApi.renderer.destroyBuffers();
+		ClientApi.renderer.requestCleanup();
+		GLProxy.ensureAllGLJobCompleted();
+		recalculateWidths = true;
+		ApiShared.previousVertQual = null;
+		
+		// TODO: Check if after the refactoring, is this still needed
+		ClientApi.renderer = new LodRenderer(ClientApi.lodBufferBuilderFactory);
+		ClientApi.INSTANCE.rendererDisabledBecauseOfExceptions = false;
+		ApiShared.LOGGER.info("Distant Horizon unloaded");
 	}
 	
 	public void blockChangeEvent(IChunkWrapper chunk, IDimensionTypeWrapper dimType)
 	{
+		if (dimType != MC.getCurrentDimension())
+			return;
 		// recreate the LOD where the blocks were changed
-		ApiShared.lodBuilder.generateLodNodeAsync(chunk, ApiShared.lodWorld, dimType);		
+		LagSpikeCatcher blockChangeUpdate = new LagSpikeCatcher();
+		ClientApi.INSTANCE.toBeLoaded.add(chunk.getLongChunkPos());
+		blockChangeUpdate.end("clientChunkLoad");
 	}
 	
-	
-	
-	
-	//=============//
+	// =============//
 	// Misc Events //
-	//=============//
+	// =============//
 	
-	public void onKeyInput(int key, int keyAction)
-	{
-		if (CONFIG.client().advanced().debugging().getDebugKeybindingsEnabled())
-		{
-			if (key == GLFW.GLFW_KEY_F8 && keyAction == GLFW.GLFW_PRESS)
-			{
-				CONFIG.client().advanced().debugging().setDebugMode(CONFIG.client().advanced().debugging().getDebugMode().getNext());
-				MC.sendChatMessage("F8: Set debug mode " + CONFIG.client().advanced().debugging().getDebugMode());
-			}
-			
-			if (key == GLFW.GLFW_KEY_F6 && keyAction == GLFW.GLFW_PRESS)
-			{
-				CONFIG.client().advanced().debugging().setDrawLods(!CONFIG.client().advanced().debugging().getDrawLods());
-				MC.sendChatMessage("F6: Set rendering " + CONFIG.client().advanced().debugging().getDrawLods());
-			}
-		}
-	}
+	// NOTE: This is being called from Render Thread.
 	
 	/** Re-centers the given LodDimension if it needs to be. */
 	public void playerMoveEvent(LodDimension lodDim)
 	{
 		// make sure the dimension is centered
 		RegionPos playerRegionPos = new RegionPos(MC.getPlayerBlockPos());
-		RegionPos worldRegionOffset = new RegionPos(playerRegionPos.x - lodDim.getCenterRegionPosX(), playerRegionPos.z - lodDim.getCenterRegionPosZ());
+		RegionPos center = lodDim.getCenterRegionPos();
+		RegionPos worldRegionOffset = new RegionPos(playerRegionPos.x - center.x, playerRegionPos.z - center.z);
 		if (worldRegionOffset.x != 0 || worldRegionOffset.z != 0)
 		{
-			ApiShared.lodWorld.saveAllDimensions();
 			lodDim.move(worldRegionOffset);
-			//LOGGER.info("offset: " + worldRegionOffset.x + "," + worldRegionOffset.z + "\t center: " + lodDim.getCenterX() + "," + lodDim.getCenterZ());
+			// LOGGER.info("offset: " + worldRegionOffset.x + "," + worldRegionOffset.z +
+			// "\t center: " + lodDim.getCenterX() + "," + lodDim.getCenterZ());
 		}
 	}
 	
@@ -225,7 +228,8 @@ public class EventApi
 		// calculate how wide the dimension(s) should be in regions
 		int chunksWide;
 		if (MC.getWrappedClientWorld().getDimensionType().hasCeiling())
-			chunksWide = Math.min(CONFIG.client().graphics().quality().getLodChunkRenderDistance(), LodUtil.CEILED_DIMENSION_MAX_RENDER_DISTANCE) * 2 + 1;
+			chunksWide = Math.min(CONFIG.client().graphics().quality().getLodChunkRenderDistance(),
+					LodUtil.CEILED_DIMENSION_MAX_RENDER_DISTANCE) * 2 + 1;
 		else
 			chunksWide = CONFIG.client().graphics().quality().getLodChunkRenderDistance() * 2 + 1;
 		
@@ -236,18 +240,16 @@ public class EventApi
 		// do the dimensions need to change in size?
 		if (ApiShared.lodBuilder.defaultDimensionWidthInRegions != newWidth || recalculateWidths)
 		{
-			ApiShared.lodWorld.saveAllDimensions();
-			
 			// update the dimensions to fit the new width
 			ApiShared.lodWorld.resizeDimensionRegionWidth(newWidth);
 			ApiShared.lodBuilder.defaultDimensionWidthInRegions = newWidth;
-			ClientApi.renderer.setupBuffers(ApiShared.lodWorld.getLodDimension(MC.getCurrentDimension()));
+			ClientApi.renderer.setupBuffers();
 			
 			recalculateWidths = false;
-			//LOGGER.info("new dimension width in regions: " + newWidth + "\t potential: " + newWidth );
+			// LOGGER.info("new dimension width in regions: " + newWidth + "\t potential: "
+			// + newWidth );
 		}
 		DetailDistanceUtil.updateSettings();
 	}
 	
-	
 }

src/main/java/com/seibel/lod/core/builders/bufferBuilding/CubicLodTemplate.java

@@ -1,160 +0,0 @@
-/*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
- *    licensed under the GNU GPL v3 License.
- *
- *    Copyright (C) 2020  James Seibel
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU General Public License as published by
- *    the Free Software Foundation, version 3.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU General Public License for more details.
- *
- *    You should have received a copy of the GNU General Public License
- *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.seibel.lod.core.builders.bufferBuilding;
-
-import java.util.Map;
-
-import com.seibel.lod.core.enums.LodDirection;
-import com.seibel.lod.core.enums.rendering.DebugMode;
-import com.seibel.lod.core.objects.VertexOptimizer;
-import com.seibel.lod.core.objects.opengl.LodBufferBuilder;
-import com.seibel.lod.core.util.ColorUtil;
-import com.seibel.lod.core.util.DataPointUtil;
-import com.seibel.lod.core.util.LodUtil;
-
-import static com.seibel.lod.core.builders.lodBuilding.LodBuilder.MIN_WORLD_HEIGHT;
-
-
-
-/**
- * Builds LODs as rectangular prisms.
- * @author James Seibel
- * @version 12-8-2021
- */
-public class CubicLodTemplate
-{
-	//TODO make it a config
-	static int cullingRange = 128;
-	
-	public static void addLodToBuffer(LodBufferBuilder buffer, int playerX, int playerZ, long data, Map<LodDirection, long[]> adjData,
-			byte detailLevel, int posX, int posZ, VertexOptimizer vertexOptimizer, DebugMode debugging, boolean[] adjShadeDisabled)
-	{
-		if (vertexOptimizer == null)
-			return;
-		
-		// equivalent to 2^detailLevel
-		int blockWidth = 1 << detailLevel;
-		
-		int color;
-		if (debugging != DebugMode.OFF)
-			color = LodUtil.DEBUG_DETAIL_LEVEL_COLORS[detailLevel].getRGB();
-		else
-			color = DataPointUtil.getColor(data);
-		
-		
-		generateBoundingBox(
-				vertexOptimizer,
-				DataPointUtil.getHeight(data),
-				DataPointUtil.getDepth(data),
-				blockWidth,
-				posX * blockWidth, 0, posZ * blockWidth, // x, y, z offset
-				playerX,
-				playerZ,
-				adjData,
-				color,
-				DataPointUtil.getLightSkyAlt(data),
-				DataPointUtil.getLightBlock(data),
-				adjShadeDisabled);
-		
-		addBoundingBoxToBuffer(buffer, vertexOptimizer);
-	}
-	
-	/** add the given position and color to the buffer */
-	public static void addPosAndColor(LodBufferBuilder buffer,
-			float x, float y, float z,
-			int color, byte skyLightValue, byte blockLightValue)
-	{
-		// TODO transparency re-add by replacing the color 255 with "ColorUtil.getAlpha(color)"
-		buffer.position(x, y, z)
-		.color(ColorUtil.getRed(color), ColorUtil.getGreen(color), ColorUtil.getBlue(color), 255)
-		.minecraftLightValue(skyLightValue).minecraftLightValue(blockLightValue)
-		.endVertex();
-	}
-	
-	
-	
-	private static void generateBoundingBox(VertexOptimizer vertexOptimizer,
-			int height, int depth, int width,
-			double xOffset, double yOffset, double zOffset,
-			int playerX, int playerZ,
-			Map<LodDirection, long[]> adjData,
-			int color, byte skyLight, byte blockLight,
-			boolean[] adjShadeDisabled)
-	{
-		// don't add an LOD if it is empty
-		if (height == -1 && depth == -1)
-			return;
-		
-		if (depth == height)
-			// if the top and bottom points are at the same height
-			// render this LOD as 1 block thick
-			height++;
-		
-		// offset the AABB by its x/z position in the world since
-		// it uses doubles to specify its location, unlike the model view matrix
-		// which only uses floats
-		double x = -playerX;
-		double z = -playerZ;
-		vertexOptimizer.reset();
-		vertexOptimizer.setColor(color, adjShadeDisabled);
-		vertexOptimizer.setLights(skyLight, blockLight);
-		vertexOptimizer.setWidth(width, height - depth, width);
-		vertexOptimizer.setOffset((int) (xOffset + x), (int) (depth + yOffset), (int) (zOffset + z));
-		vertexOptimizer.setAdjData(adjData);
-	}
-	
-	private static void addBoundingBoxToBuffer(LodBufferBuilder buffer, VertexOptimizer vertexOptimizer)
-	{
-		int color;
-		byte skyLight;
-		byte blockLight;
-		
-		for (LodDirection lodDirection : VertexOptimizer.DIRECTIONS)
-		{
-			//if(vertexOptimizer.isCulled(lodDirection))
-			//	continue;
-			// culling
-			if (lodDirection == LodDirection.NORTH && vertexOptimizer.getZ(lodDirection, 0) < -cullingRange
-				|| lodDirection == LodDirection.EAST && vertexOptimizer.getX(lodDirection, 0) > cullingRange
-				|| lodDirection == LodDirection.SOUTH && vertexOptimizer.getZ(lodDirection, 0) > cullingRange
-				|| lodDirection == LodDirection.WEST && vertexOptimizer.getX(lodDirection, 0) < -cullingRange)
-				continue;
-			
-			
-			int verticalFaceIndex = 0;
-			while (vertexOptimizer.shouldRenderFace(lodDirection, verticalFaceIndex))
-			{
-				for (int vertexIndex = 0; vertexIndex < 6; vertexIndex++)
-				{
-					skyLight = vertexOptimizer.getSkyLight(lodDirection, verticalFaceIndex);
-					blockLight = (byte) vertexOptimizer.getBlockLight();
-					color = vertexOptimizer.getColor(lodDirection);
-					addPosAndColor(buffer,
-							vertexOptimizer.getX(lodDirection, vertexIndex),
-							vertexOptimizer.getY(lodDirection, vertexIndex, verticalFaceIndex) + MIN_WORLD_HEIGHT,
-							vertexOptimizer.getZ(lodDirection, vertexIndex),
-							color, skyLight, blockLight );
-				}
-				verticalFaceIndex++;
-			}
-		}
-	}
-	
-}

src/main/java/com/seibel/lod/core/builders/lodBuilding/LodBuilder.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,31 +19,31 @@
 
 package com.seibel.lod.core.builders.lodBuilding;
 
+import java.util.ConcurrentModificationException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
+import com.seibel.lod.core.enums.LodDirection;
+import com.seibel.lod.core.enums.config.BlocksToAvoid;
 import com.seibel.lod.core.enums.config.DistanceGenerationMode;
-import com.seibel.lod.core.enums.config.HorizontalResolution;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.logging.ConfigBasedLogger;
 import com.seibel.lod.core.objects.lod.LodDimension;
 import com.seibel.lod.core.objects.lod.LodRegion;
 import com.seibel.lod.core.objects.lod.LodWorld;
-import com.seibel.lod.core.util.ColorUtil;
 import com.seibel.lod.core.util.DataPointUtil;
 import com.seibel.lod.core.util.DetailDistanceUtil;
 import com.seibel.lod.core.util.LevelPosUtil;
 import com.seibel.lod.core.util.LodThreadFactory;
 import com.seibel.lod.core.util.LodUtil;
-import com.seibel.lod.core.util.SingletonHandler;
-import com.seibel.lod.core.util.ThreadMapUtil;
-import com.seibel.lod.core.wrapperInterfaces.block.IBlockColorSingletonWrapper;
-import com.seibel.lod.core.wrapperInterfaces.block.IBlockColorWrapper;
-import com.seibel.lod.core.wrapperInterfaces.block.IBlockShapeWrapper;
+import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
+import com.seibel.lod.core.wrapperInterfaces.block.IBlockDetailWrapper;
 import com.seibel.lod.core.wrapperInterfaces.chunk.IChunkWrapper;
 import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
-import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
-import com.seibel.lod.core.wrapperInterfaces.world.IBiomeWrapper;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.lod.core.wrapperInterfaces.world.IDimensionTypeWrapper;
 import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
+import org.apache.logging.log4j.LogManager;
 
 /**
  * This object is in charge of creating Lod related objects.
@@ -56,9 +56,12 @@ import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
 @SuppressWarnings("GrazieInspection")
 public class LodBuilder
 {
-	private static final IMinecraftWrapper MC = SingletonHandler.get(IMinecraftWrapper.class);
-	private static final IBlockColorSingletonWrapper BLOCK_COLOR = SingletonHandler.get(IBlockColorSingletonWrapper.class);
-	
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
+	private static final IWrapperFactory FACTORY = SingletonHandler.get(IWrapperFactory.class);
+	private static final ILodConfigWrapperSingleton config = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+
+	public static final ConfigBasedLogger EVENT_LOGGER = new ConfigBasedLogger(LogManager.getLogger(LodBuilder.class),
+			() -> config.client().advanced().debugging().debugSwitch().getLogLodBuilderEvent());
 	
 	/** This cannot be final! Different world have different height, and in menu, this causes Null Exceptions*/
 	//public static final short MIN_WORLD_HEIGHT = MC.getWrappedClientWorld().getMinHeight();
@@ -66,9 +69,10 @@ public class LodBuilder
 	/** Minecraft's max light value */
 	public static final short DEFAULT_MAX_LIGHT = 15;
 	
-	
-	private final ExecutorService lodGenThreadPool = Executors.newSingleThreadExecutor(new LodThreadFactory(this.getClass().getSimpleName()));
-	private final ILodConfigWrapperSingleton config = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	//public static final ExecutorService lodGenThreadPool = Executors.newFixedThreadPool(8, new ThreadFactoryBuilder().setNameFormat("Lod-Builder-%d").build());
+
+	private final ExecutorService lodGenThreadPool = Executors.newSingleThreadExecutor(
+			new LodThreadFactory(this.getClass().getSimpleName(), Thread.NORM_PRIORITY-1));
 	
 	
 	
@@ -76,11 +80,10 @@ public class LodBuilder
 	 * How wide LodDimensions should be in regions <br>
 	 * Is automatically set before the first frame in ClientProxy.
 	 */
-	public int defaultDimensionWidthInRegions = 0;
+	public int defaultDimensionWidthInRegions = 1;
 	
 	//public static final boolean useExperimentalLighting = true;
 	
-	private static int timesToEdgeDetect = 1;
 	
 	
 	
@@ -89,27 +92,33 @@ public class LodBuilder
 	
 	}
 	
-	public void generateLodNodeAsync(IChunkWrapper chunk, LodWorld lodWorld, IDimensionTypeWrapper dim)
+	public void generateLodNodeAsync(IChunkWrapper chunk, LodWorld lodWorld, IDimensionTypeWrapper dim, boolean genAll)
 	{
-		generateLodNodeAsync(chunk, lodWorld, dim, DistanceGenerationMode.FULL);
+		// Block change event
+		generateLodNodeAsync(chunk, lodWorld, dim, DistanceGenerationMode.FULL, true, genAll, ()->{},
+				()->{generateLodNodeAsync(chunk,lodWorld,dim, genAll);});
 	}
 	
-	public void generateLodNodeAsync(IChunkWrapper chunk, LodWorld lodWorld, IDimensionTypeWrapper dim, DistanceGenerationMode generationMode)
+	public void generateLodNodeAsync(IChunkWrapper chunk, LodWorld lodWorld, IDimensionTypeWrapper dim,
+			DistanceGenerationMode generationMode, boolean override, boolean genAll, Runnable endCallback, Runnable retryCallback)
 	{
-		if (lodWorld == null || lodWorld.getIsWorldNotLoaded())
+		if (lodWorld == null || lodWorld.getIsWorldNotLoaded()) {
+			endCallback.run();
 			return;
-		
+		}
 		// don't try to create an LOD object
 		// if for some reason we aren't
 		// given a valid chunk object
-		if (chunk == null)
+		if (chunk == null) {
+			endCallback.run();
 			return;
+		}
 		
-		Thread thread = new Thread(() ->
+		Runnable thread = () ->
 		{
-			//noinspection GrazieInspection
-			//try
-			//{
+			boolean retryNeeded = false;
+			try
+			{
 				// we need a loaded client world in order to
 				// get the textures for blocks
 				if (MC.getWrappedClientWorld() == null)
@@ -121,26 +130,25 @@ public class LodBuilder
 					return;
 				
 				// make sure the dimension exists
-				LodDimension lodDim;
-				if (lodWorld.getLodDimension(dim) == null)
-				{
-					lodDim = new LodDimension(dim, lodWorld, defaultDimensionWidthInRegions);
-					lodWorld.addLodDimension(lodDim);
-				}
+				// if not, it prob means that player left
+				LodDimension lodDim = lodWorld.getLodDimension(dim);
+				if (lodDim == null) return;
+				
+				retryNeeded = !generateLodNodeFromChunk(lodDim, chunk, new LodBuilderConfig(generationMode), override, genAll);
+			}
+			catch (RuntimeException e)
+			{
+				EVENT_LOGGER.error("LodBuilder Thread Uncaught Exception: ", e);
+				// if the world changes while LODs are being generated
+				// they will throw errors as they try to access things that no longer
+				// exist.
+			} finally {
+				if (!retryNeeded)
+					endCallback.run();
 				else
-				{
-					lodDim = lodWorld.getLodDimension(dim);
-				}
-				generateLodNodeFromChunk(lodDim, chunk, new LodBuilderConfig(generationMode));
-			//}
-			//catch (IllegalArgumentException | NullPointerException e)
-			//{
-			//	e.printStackTrace();
-			//	// if the world changes while LODs are being generated
-			//	// they will throw errors as they try to access things that no longer
-			//	// exist.
-			//}
-		});
+					retryCallback.run();
+			}
+		};
 		lodGenThreadPool.execute(thread);
 	}
 	
@@ -148,202 +156,275 @@ public class LodBuilder
 	 * Creates a LodNode for a chunk in the given world.
 	 * @throws IllegalArgumentException thrown if either the chunk or world is null.
 	 */
-	public void generateLodNodeFromChunk(LodDimension lodDim, IChunkWrapper chunk) throws IllegalArgumentException
+	public boolean generateLodNodeFromChunk(LodDimension lodDim, IChunkWrapper chunk, LodBuilderConfig config, boolean override, boolean genAll)
 	{
-		generateLodNodeFromChunk(lodDim, chunk, new LodBuilderConfig());
+		try {
+			if (chunk == null)
+				throw new IllegalArgumentException("generateLodFromChunk given a null chunk");
+			LodRegion region = lodDim.getRegion(chunk.getRegionPosX(), chunk.getRegionPosZ());
+			if (region == null)
+				return false;
+			// this happens if a LOD is generated after the user leaves the world.
+			if (MC.getWrappedClientWorld() == null)
+				return false;
+			if (!canGenerateLodFromChunk(chunk))
+				return false;
+			
+	
+			// generate the LODs
+			int maxVerticalData = DetailDistanceUtil.getMaxVerticalData((byte)0);
+			long[] data = new long[maxVerticalData*16*16];
+			boolean isAllVoid = true;
+			
+			if (!config.quickFillWithVoid) {
+				for (int i = 0; i < 16*16; i++)
+				{
+					int subX = i/16;
+					int subZ = i%16;
+					writeVerticalData(data, i*maxVerticalData, maxVerticalData, chunk, config, subX, subZ);
+					isAllVoid &= DataPointUtil.isVoid(data[i*maxVerticalData]);
+					if (!DataPointUtil.doesItExist(data[i*maxVerticalData]))
+						throw new RuntimeException("writeVerticalData result: Datapoint does not exist at "+ chunk.getMinX()+subX +", "+ chunk.getMinZ()+subZ);
+					if (DataPointUtil.getGenerationMode(data[i*maxVerticalData]) != config.distanceGenerationMode.complexity)
+						throw new RuntimeException("writeVerticalData result: Datapoint invalid at "+ chunk.getMinX()+subX +", "+ chunk.getMinZ()+subZ);
+				}
+			} else {
+				for (int i = 0; i < 16*16; i++)
+				{
+					data[i*maxVerticalData] = DataPointUtil.createVoidDataPoint(config.distanceGenerationMode.complexity);
+				}
+			}
+			if (isAllVoid) EVENT_LOGGER.debug("The chunk {} is completely void.", chunk);
+
+			// This MUST be done after the data is generated, to ensure that during the generation, the data is valid.
+			if (!canGenerateLodFromChunk(chunk)) // TODO Why are we calling this again? - James
+				return false;					 // Answer: Because concurrency change may cause the chunk to have invalid data, like light.
+
+			if (genAll) {
+				return writeAllLodNodeData(lodDim, region, chunk.getChunkPosX(), chunk.getChunkPosZ(), data, config, override);
+			} else {
+				return writePartialLodNodeData(lodDim, region, chunk.getChunkPosX(), chunk.getChunkPosZ(), data, config, override);
+			}
+		} catch (RuntimeException e) {
+			EVENT_LOGGER.error("LodBuilder encountered an error on building lod: ", e);
+			return false;
+		}
+	}
+	public static boolean canGenerateLodFromChunk(IChunkWrapper chunk)
+	{
+		return chunk != null && chunk.isLightCorrect() && chunk.doesNearbyChunksExist();
 	}
 	
-	/**
-	 * Creates a LodNode for a chunk in the given world.
-	 * @throws IllegalArgumentException thrown if either the chunk or world is null.
-	 */
-	public void generateLodNodeFromChunk(LodDimension lodDim, IChunkWrapper chunk, LodBuilderConfig config)
-			throws IllegalArgumentException
-	{
-		//long executeTime = System.currentTimeMillis();
-		if (chunk == null)
-			throw new IllegalArgumentException("generateLodFromChunk given a null chunk");
-		
-		int startX;
-		int startZ;
-		
-		
-		LodRegion region = lodDim.getRegion(chunk.getRegionPosX(), chunk.getRegionPosZ());
-		if (region == null)
-			return;
-		
-		// this happens if a LOD is generated after the user leaves the world.
-		if (MC.getWrappedClientWorld() == null)
-			return;
-		
-		// determine how many LODs to generate horizontally
-		byte minDetailLevel = region.getMinDetailLevel();
-		HorizontalResolution detail = DetailDistanceUtil.getLodGenDetail(minDetailLevel);
-		
-		
-		// determine how many LODs to generate vertically
-		//VerticalQuality verticalQuality = LodConfig.CLIENT.graphics.qualityOption.verticalQuality.get();
-		byte detailLevel = detail.detailLevel;
-		
-		
-		// generate the LODs
-		int posX;
-		int posZ;
-		for (int i = 0; i < detail.dataPointLengthCount * detail.dataPointLengthCount; i++)
-		{
-			startX = detail.startX[i];
-			startZ = detail.startZ[i];
-			
-			long[] data;
-			long[] dataToMergeVertical = createVerticalDataToMerge(detail, chunk, config, startX, startZ);
-			data = DataPointUtil.mergeMultiData(dataToMergeVertical, DataPointUtil.WORLD_HEIGHT / 2 + 1, DetailDistanceUtil.getMaxVerticalData(detailLevel));
-			
-			
-			//lodDim.clear(detailLevel, posX, posZ);
-			if (data != null && data.length != 0)
-			{
-				posX = LevelPosUtil.convert((byte) 0, chunk.getChunkPosX() * 16 + startX, detail.detailLevel);
-				posZ = LevelPosUtil.convert((byte) 0, chunk.getChunkPosZ() * 16 + startZ, detail.detailLevel);
-				lodDim.addVerticalData(detailLevel, posX, posZ, data, false);
+	
+	private boolean writeAllLodNodeData(LodDimension lodDim, LodRegion region, int chunkX, int chunkZ,
+			long[] data, LodBuilderConfig config, boolean override)
+	{	
+		region.isWriting.incrementAndGet();
+		try {
+			if (region.getMinDetailLevel()!= 0) {
+				if (!LodUtil.checkRamUsage(0.05, 16)) {
+					EVENT_LOGGER.debug("LodBuilder: Not enough RAM avalible for loading files to build lods! Returning...");
+					return false;
+				}
+				
+				LodRegion newRegion = lodDim.getRegionFromFile(region, (byte)0, region.getVerticalQuality());
+				if (region!=newRegion)
+					throw new RuntimeException();
 			}
+			//ApiShared.LOGGER.info("Generate chunk: {}, {} ({}, {}) at genMode {}",
+			//		chunk.getChunkPosX(), chunk.getChunkPosZ(), chunk.getMinX(), chunk.getMinZ(), config.distanceGenerationMode);
+			region.addChunkOfData((byte)0, chunkX*16, chunkZ*16, 16, 16, data, data.length/16/16, override);
+			region.regenerateLodFromArea((byte)0, chunkX*16, chunkZ*16, 16, 16);
+			
+			if (!region.doesDataExist((byte)0, chunkX*16, chunkZ*16, config.distanceGenerationMode))
+				throw new RuntimeException("data at detail 0 is still null after writes to it!");
+			if (!region.doesDataExist(LodUtil.CHUNK_DETAIL_LEVEL, chunkX, chunkZ, config.distanceGenerationMode))
+				throw new RuntimeException("data at chunk detail level is still null after writes to it!");
+		} finally {
+			region.isWriting.decrementAndGet();
 		}
-		lodDim.updateData(LodUtil.CHUNK_DETAIL_LEVEL, chunk.getChunkPosX(), chunk.getChunkPosZ());
-		//executeTime = System.currentTimeMillis() - executeTime;
-		//if (executeTime > 0) ClientApi.LOGGER.info("generateLodNodeFromChunk level: " + detailLevel + " time ms: " + executeTime);
+		return true;
 	}
+
+	private boolean writePartialLodNodeData(LodDimension lodDim, LodRegion region, int chunkX, int chunkZ,
+			long[] data, LodBuilderConfig config, boolean override)
+	{
+		region.isWriting.incrementAndGet();
+		try {
+			byte targetLevel = region.getMinDetailLevel();
+			int vertQual = DetailDistanceUtil.getMaxVerticalData(targetLevel);
+			int lodCount = (targetLevel >= LodUtil.CHUNK_DETAIL_LEVEL) ?
+					1 : 1 << (LodUtil.CHUNK_DETAIL_LEVEL - targetLevel);
+			if (targetLevel != 0) {
+				int lodWidth = 16/lodCount;
+				int inputVertQual = data.length/16/16;
+				long[] mergedData = new long[vertQual*lodCount*lodCount];
+				for (int subX=0; subX<lodCount; subX++) {
+					for (int subZ=0; subZ<lodCount; subZ++) {
+						long[] toBeMerged = DataPointUtil.extractDataArray(
+								data, 16, 16, subX*lodWidth, subZ*lodWidth, lodWidth, lodWidth);
+						if(toBeMerged.length != lodWidth*lodWidth*inputVertQual) throw new RuntimeException();
+						long[] merged = DataPointUtil.mergeMultiData(toBeMerged, inputVertQual, vertQual);
+						if (merged.length != vertQual) throw new RuntimeException();
+						if (!DataPointUtil.doesItExist(merged[0]) ||
+								DataPointUtil.getGenerationMode(merged[0]) != config.distanceGenerationMode.complexity)
+							throw new RuntimeException();
+						System.arraycopy(merged, 0, mergedData, (subZ+subX*lodCount)*vertQual, vertQual);
+					}
+				}
+				data = mergedData;
+			}
+			if (lodCount*lodCount*vertQual != data.length) throw new RuntimeException();
+			for (int i=0; i<data.length; i+=vertQual) {
+				if (!DataPointUtil.doesItExist(data[i]) ||
+						DataPointUtil.getGenerationMode(data[i]) != config.distanceGenerationMode.complexity) {
+					EVENT_LOGGER.error("NULL data at {}, detail {}, vertQual {}, lodCount {}, chunkPos [{},{}]\n"
+							+ "Data: {}",
+							i, targetLevel, vertQual, lodCount, chunkX, chunkZ, DataPointUtil.toString(data[i]));
+					throw new RuntimeException("Null data!");
+				}
+			}
+			
+			
+			//ApiShared.LOGGER.info("Generate chunk: {}, {} ({}, {}) at genMode {}",
+			//		chunk.getChunkPosX(), chunk.getChunkPosZ(), chunk.getMinX(), chunk.getMinZ(), config.distanceGenerationMode);
+			if (targetLevel != region.getMinDetailLevel()) {
+				//Concurrency issues happened.
+				throw new ConcurrentModificationException("Min detail level changed while writing data");
+			}
+			region.addChunkOfData(targetLevel,
+					LevelPosUtil.convert(LodUtil.CHUNK_DETAIL_LEVEL, chunkX, targetLevel),
+					LevelPosUtil.convert(LodUtil.CHUNK_DETAIL_LEVEL, chunkZ, targetLevel),
+					lodCount, lodCount, data, vertQual, override);
+			region.regenerateLodFromArea(targetLevel,
+					LevelPosUtil.convert(LodUtil.CHUNK_DETAIL_LEVEL, chunkX, targetLevel),
+					LevelPosUtil.convert(LodUtil.CHUNK_DETAIL_LEVEL, chunkZ, targetLevel),
+					lodCount, lodCount);
+			
+			if (!region.doesDataExist(targetLevel,
+					LevelPosUtil.convert(LodUtil.CHUNK_DETAIL_LEVEL, chunkX, targetLevel),
+					LevelPosUtil.convert(LodUtil.CHUNK_DETAIL_LEVEL, chunkZ, targetLevel),
+					config.distanceGenerationMode))
+				throw new RuntimeException("data at detail "+ targetLevel+" is still null after writes to it!");
+		} catch (Exception e) {
+			EVENT_LOGGER.error("LodBuilder encountered an error on writePartialLodNodeData: ", e);
+		} finally {
+			region.isWriting.decrementAndGet();
+		}
+		return true;
+	}
+
+	
 	
 	/** creates a vertical DataPoint */
-	private long[] createVerticalDataToMerge(HorizontalResolution detail, IChunkWrapper chunk, LodBuilderConfig config, int startX, int startZ)
+	private void writeVerticalData(long[] data, int dataOffset, int maxVerticalData,
+			IChunkWrapper chunk, LodBuilderConfig config, int chunkSubPosX, int chunkSubPosZ)
 	{
-		// equivalent to 2^detailLevel
-		int size = 1 << detail.detailLevel;
+
+		int totalVerticalData = (chunk.getHeight());
+		long[] dataToMerge = new long[totalVerticalData];
 		
-		long[] dataToMerge = ThreadMapUtil.getBuilderVerticalArray(detail.detailLevel);
-		int verticalData = DataPointUtil.WORLD_HEIGHT / 2 + 1;
-		int height;
-		int depth;
-		int color;
-		int light;
-		int lightSky;
-		int lightBlock;
-		int generation = config.distanceGenerationMode.complexity;
-		
-		int xRel;
-		int zRel;
-		int xAbs;
-		int yAbs;
-		int zAbs;
 		boolean hasCeiling = MC.getWrappedClientWorld().getDimensionType().hasCeiling();
 		boolean hasSkyLight = MC.getWrappedClientWorld().getDimensionType().hasSkyLight();
-		boolean isDefault;
-		int index;
+		byte generation = config.distanceGenerationMode.complexity;
+		int count = 0;
+		// FIXME: This yAbs is just messy!
+		int x = chunk.getMinX() + chunkSubPosX;
+		int z = chunk.getMinZ() + chunkSubPosZ;
+		int y = chunk.getMaxY(x, z);
 		
-		for (index = 0; index < size * size; index++)
-		{
-			xRel = startX + index % size;
-			zRel = startZ + index / size;
-			xAbs = chunk.getMinX() + xRel;
-			zAbs = chunk.getMinZ() + zRel;
-			
-			//Calculate the height of the lod
-			yAbs = chunk.getMaxY(xRel,zRel) - MIN_WORLD_HEIGHT;
-			int count = 0;
-			boolean topBlock = true;
-			if (yAbs <= 0);
-				dataToMerge[index * verticalData] = DataPointUtil.createVoidDataPoint(generation);
-			while (yAbs > 0)
-			{
-				height = determineHeightPointFrom(chunk, config, xAbs, yAbs, zAbs);
-				
-				// If the lod is at the default height, it must be void data
-				if (height == 0)
-					break;
-				
-				yAbs = height - 1;
-				// We search light on above air block
-				depth = determineBottomPointFrom(chunk, config, xAbs, yAbs, zAbs, count < timesToEdgeDetect && !hasCeiling);
-				if (hasCeiling && topBlock)
-				{
-					yAbs = depth;
-					light = getLightValue(chunk, xAbs,yAbs + MIN_WORLD_HEIGHT, zAbs, true, hasSkyLight, true);
-					color = generateLodColor(chunk, config, xAbs, yAbs, zAbs);
-				}
-				else
-				{
-					light = getLightValue(chunk, xAbs, yAbs + MIN_WORLD_HEIGHT, zAbs, hasCeiling, hasSkyLight, topBlock);
-					color = generateLodColor(chunk, config, xAbs, yAbs, zAbs);
-				}
-				lightBlock = light & 0b1111;
-				lightSky = (light >> 4) & 0b1111;
-				isDefault = ((light >> 8)) == 1;
-				
-				dataToMerge[index * verticalData + count] = DataPointUtil.createDataPoint(height, depth, color, lightSky, lightBlock, generation, isDefault);
-				topBlock = false;
-				yAbs = depth - 1;
-				count++;
+		boolean topBlock = true;
+		if (y < chunk.getMinBuildHeight())
+			dataToMerge[0] = DataPointUtil.createVoidDataPoint(generation);
+		int maxConnectedLods = LodBuilder.config.client().graphics().quality().getVerticalQuality().maxVerticalData[0];
+		while (y >= chunk.getMinBuildHeight()) {
+			int height = determineHeightPointFrom(chunk, config, x, y, z);
+			// If the lod is at the default height, it must be void data
+			if (height < chunk.getMinBuildHeight()) {
+				if (topBlock) dataToMerge[0] = DataPointUtil.createVoidDataPoint(generation);
+				break;
 			}
+			y = height - 1;
+			// We search light on above air block
+			int depth = determineBottomPointFrom(chunk, config, x, y, z,
+					count < maxConnectedLods && (!hasCeiling || !topBlock));
+			if (hasCeiling && topBlock)
+				y = depth;
+			int light = getLightValue(chunk, x, y, z, hasCeiling, hasSkyLight, topBlock);
+			int color = generateLodColor(chunk, config, x, y, z);
+			int lightBlock = light & 0b1111;
+			int lightSky = (light >> 4) & 0b1111;
+			dataToMerge[count] = DataPointUtil.createDataPoint(height-chunk.getMinBuildHeight(), depth-chunk.getMinBuildHeight(),
+					color, lightSky, lightBlock, generation);
+			topBlock = false;
+			y = depth - 1;
+			count++;
 		}
-		return dataToMerge;
+		long[] result = DataPointUtil.mergeMultiData(dataToMerge, totalVerticalData, maxVerticalData);
+		if (result.length != maxVerticalData) throw new ArrayIndexOutOfBoundsException();
+		System.arraycopy(result, 0, data, dataOffset, maxVerticalData);
+	}
+
+	public static final LodDirection[] DIRECTIONS = new LodDirection[] {
+			LodDirection.UP,
+			LodDirection.DOWN,
+			LodDirection.WEST,
+			LodDirection.EAST,
+			LodDirection.NORTH,
+			LodDirection.SOUTH };
+	
+	private boolean hasCliffFace(IChunkWrapper chunk, int x, int y, int z) {
+		for (LodDirection dir : DIRECTIONS) {
+			IBlockDetailWrapper block = chunk.getBlockDetailAtFace(x, y, z, dir);
+			if (block == null || !block.hasFaceCullingFor(LodDirection.OPPOSITE_DIRECTIONS[dir.ordinal()]))
+				return true;
+		}
+		return false;
 	}
 	
 	/**
 	 * Find the lowest valid point from the bottom.
 	 * Used when creating a vertical LOD.
 	 */
-	private short determineBottomPointFrom(IChunkWrapper chunk, LodBuilderConfig config, int xAbs, int yAbs, int zAbs, boolean strictEdge)
+	private int determineBottomPointFrom(IChunkWrapper chunk, LodBuilderConfig builderConfig, int xAbs, int yAbs, int zAbs, boolean strictEdge)
 	{
-		short depth = 0;
-		
-		int colorOfBlock = 0;
+		int depth = chunk.getMinBuildHeight();
+		IBlockDetailWrapper currentBlockDetail = null;
 		if (strictEdge)
 		{
-			colorOfBlock = chunk.getBlockColorWrapper(xAbs, yAbs, zAbs).getColor();
-			IBlockShapeWrapper block = chunk.getBlockShapeWrapper(xAbs, yAbs + 1, zAbs);
-			if (block != null && ((this.config.client().worldGenerator().getBlocksToAvoid().nonFull && block.isNonFull())
-					|| (this.config.client().worldGenerator().getBlocksToAvoid().noCollision && block.hasNoCollision())))
-			{
-				int aboveColorInt = chunk.getBlockColorWrapper(xAbs, yAbs + 1, zAbs).getColor();
-				if (aboveColorInt != 0)
-					colorOfBlock = aboveColorInt;
+			IBlockDetailWrapper blockAbove = chunk.getBlockDetail(xAbs, yAbs + 1, zAbs);
+			if (blockAbove != null && !blockAbove.shouldRender(config.client().worldGenerator().getBlocksToAvoid()))
+			{ // The above block is skipped. Lets use its skipped color for currrent block
+				currentBlockDetail = blockAbove;
 			}
+			if (currentBlockDetail == null) currentBlockDetail = chunk.getBlockDetail(xAbs, yAbs, zAbs);
 		}
 		
-		for (int y = yAbs - 1; y >= 0; y--)
+		for (int y = yAbs - 1; y >= chunk.getMinBuildHeight(); y--)
 		{
-			
-			if (!isLayerValidLodPoint(chunk, xAbs, y, zAbs))
-			{
-				depth = (short) (y + 1);
-				break;
-			}
-			if (strictEdge)
-			{
-				if (colorOfBlock != chunk.getBlockColorWrapper(xAbs, y, zAbs).getColor())
-				{
-					depth = (short) (y + 1);
-					break;
-				}
+			IBlockDetailWrapper nextBlock = chunk.getBlockDetail(xAbs, y, zAbs);
+			if (isLayerValidLodPoint(nextBlock)) {
+				if (!strictEdge) continue;
+				if (currentBlockDetail.equals(nextBlock)) continue;
+				if (!hasCliffFace(chunk, xAbs, y, zAbs)) continue;
 			}
+			depth = (y + 1);
+			break;
 		}
 		return depth;
 	}
 	
 	/** Find the highest valid point from the Top */
-	private short determineHeightPointFrom(IChunkWrapper chunk, LodBuilderConfig config, int xAbs, int yAbs, int zAbs)
+	private int determineHeightPointFrom(IChunkWrapper chunk, LodBuilderConfig config, int xAbs, int yAbs, int zAbs)
 	{
 		//TODO find a way to skip bottom of the world
-		short height = 0;
-		if (config.useHeightmap)
-			height = (short) chunk.getHeightMapValue(xAbs, zAbs);
-		else
+		int height = chunk.getMinBuildHeight()-1;
+		for (int y = yAbs; y >= chunk.getMinBuildHeight(); y--)
 		{
-			for (int y = yAbs; y >= 0; y--)
+			if (isLayerValidLodPoint(chunk, xAbs, y, zAbs))
 			{
-				if (isLayerValidLodPoint(chunk, xAbs, y, zAbs))
-				{
-					height = (short) (y + 1);
-					break;
-				}
+				height = (y + 1);
+				break;
 			}
 		}
 		return height;
@@ -370,25 +451,24 @@ public class LodBuilder
 		}
 		else
 		{
-			colorInt = getColorForBlock(chunk, x, y, z);
-			
 			// if we are skipping non-full and non-solid blocks that means we ignore
 			// snow, flowers, etc. Get the above block so we can still get the color
 			// of the snow, flower, etc. that may be above this block
-			int aboveColorInt = 0;
-			IBlockShapeWrapper block = chunk.getBlockShapeWrapper(x, y + 1, z);
-			if (block != null && ((config.client().worldGenerator().getBlocksToAvoid().nonFull && block.isNonFull())
-					|| (config.client().worldGenerator().getBlocksToAvoid().noCollision && block.hasNoCollision())))
-				aboveColorInt = getColorForBlock(chunk, x, y + 1, z);
-			
-			//if (colorInt == 0 && yAbs > 0)
-			// if this block is invisible, check the block below it
-			//	colorInt = generateLodColor(chunk, config, xRel, yAbs - 1, zRel, blockPos);
+			colorInt = 0;
+			if (chunk.blockPosInsideChunk(x, y+1, z)) {
+				IBlockDetailWrapper blockAbove = chunk.getBlockDetail(x, y+1, z);
+				if (blockAbove != null && !blockAbove.shouldRender(config.client().worldGenerator().getBlocksToAvoid()))
+				{  // The above block is skipped. Lets use its skipped color for currrent block
+					colorInt = blockAbove.getAndResolveFaceColor(null, chunk, FACTORY.createBlockPos(x, y+1, z));
+				}
+			}
 			
 			// override this block's color if there was a block above this
 			// and we were avoiding non-full/non-solid blocks
-			if (aboveColorInt != 0)
-				colorInt = aboveColorInt;
+			if (colorInt == 0) {
+				IBlockDetailWrapper detail = chunk.getBlockDetail(x, y, z);
+				colorInt = detail.getAndResolveFaceColor(null, chunk, FACTORY.createBlockPos(x, y, z));
+			}
 		}
 		
 		return colorInt;
@@ -397,12 +477,8 @@ public class LodBuilder
 	/** Gets the light value for the given block position */
 	private int getLightValue(IChunkWrapper chunk, int x, int y, int z, boolean hasCeiling, boolean hasSkyLight, boolean topBlock)
 	{
-		int skyLight = 0;
+		int skyLight;
 		int blockLight;
-		// 1 means the lighting is a guess
-		int isDefault = 0;
-		
-		IWorldWrapper world = MC.getWrappedServerWorld();
 		
 		int blockBrightness = chunk.getEmittedBrightness(x, y, z);
 		// get the air block above or below this block
@@ -411,69 +487,60 @@ public class LodBuilder
 		else
 			y++;
 		
+		blockLight = chunk.getBlockLight(x, y, z);
+		skyLight = hasSkyLight ? chunk.getSkyLight(x, y, z) : 0;
 		
-		
-		if (world != null)
+		if (blockLight == -1 || skyLight == -1)
 		{
-			// server world sky light (always accurate)
-			blockLight = world.getBlockLight(x,y,z);
-			if (topBlock && !hasCeiling && hasSkyLight)
-				skyLight = DEFAULT_MAX_LIGHT;
+			
+			IWorldWrapper world = MC.getWrappedServerWorld();
+			
+			if (world != null)
+			{
+				// server world sky light (always accurate)
+				blockLight = world.getBlockLight(x, y, z);
+				
+				if (topBlock && !hasCeiling && hasSkyLight)
+					skyLight = DEFAULT_MAX_LIGHT;
+				else
+					skyLight = hasSkyLight ? world.getSkyLight(x, y, z) : 0;
+				
+				if (!topBlock && skyLight == 15)
+				{
+					// we are on predicted terrain, and we don't know what the light here is,
+					// lets just take a guess
+					skyLight = 12;
+				}
+			}
 			else
 			{
-				if (hasSkyLight)
-					skyLight = world.getSkyLight(x,y,z);
-				//else
-				//	skyLight = 0;
-			}
-			if (!topBlock && skyLight == 15)
-			{
-				// we are on predicted terrain, and we don't know what the light here is,
-				// lets just take a guess
-				if (y >= MC.getWrappedClientWorld().getSeaLevel() - 5)
+				world = MC.getWrappedClientWorld();
+				if (world == null)
 				{
+					blockLight = 0;
 					skyLight = 12;
-					isDefault = 1;
 				}
 				else
-					skyLight = 0;
-			}
-		}
-		else
-		{
-			world = MC.getWrappedClientWorld();
-			if (world==null)
-			{
-				blockLight = 0;
-				skyLight = 12;
-				isDefault = 1;
-			}
-			else
-			{
-				// client world sky light (almost never accurate)
-				blockLight = world.getBlockLight(x,y,z);
-				// estimate what the lighting should be
-				if (hasSkyLight || !hasCeiling)
 				{
-					if (topBlock)
-						skyLight = DEFAULT_MAX_LIGHT;
-					else
+					// client world sky light (almost never accurate)
+					blockLight = world.getBlockLight(x, y, z);
+					// estimate what the lighting should be
+					if (hasSkyLight || !hasCeiling)
 					{
-						if (hasSkyLight)
-							skyLight = world.getSkyLight(x,y,z);
-						//else
-						//	skyLight = 0;
-						if (!chunk.isLightCorrect() && (skyLight == 0 || skyLight == 15))
+						if (topBlock)
+							skyLight = DEFAULT_MAX_LIGHT;
+						else
 						{
-							// we don't know what the light here is,
-							// lets just take a guess
-							if (y >= MC.getWrappedClientWorld().getSeaLevel() - 5)
+							if (hasSkyLight)
+								skyLight = world.getSkyLight(x, y, z);
+							//else
+							//	skyLight = 0;
+							if (!chunk.isLightCorrect() && (skyLight == 0 || skyLight == 15))
 							{
+								// we don't know what the light here is,
+								// lets just take a guess
 								skyLight = 12;
-								isDefault = 1;
 							}
-							else
-								skyLight = 0;
 						}
 					}
 				}
@@ -481,68 +548,21 @@ public class LodBuilder
 		}
 		
 		blockLight = LodUtil.clamp(0, Math.max(blockLight, blockBrightness), DEFAULT_MAX_LIGHT);
-		
-		return blockLight + (skyLight << 4) + (isDefault << 8);
+		return blockLight + (skyLight << 4);
 	}
-	
-	/** Returns a color int for the given block. */
-	private int getColorForBlock(IChunkWrapper chunk, int x, int y, int z)
+
+	/** Is the block at the given blockPos a valid LOD point? */
+	private boolean isLayerValidLodPoint(IBlockDetailWrapper blockDetail)
 	{
-		int colorOfBlock;
-		int colorInt;
-		
-		IBlockShapeWrapper blockShapeWrapper = chunk.getBlockShapeWrapper(x, y, z);
-		
-		if (blockShapeWrapper == null || blockShapeWrapper.isToAvoid())
-			return 0;
-		
-		IBlockColorWrapper blockColorWrapper;
-		
-		if (chunk.isWaterLogged(x, y, z))
-			blockColorWrapper = BLOCK_COLOR.getWaterColor();
-		else
-			blockColorWrapper = chunk.getBlockColorWrapper(x, y, z);
-		
-		
-		
-		colorOfBlock = blockColorWrapper.getColor();
-		
-		
-		if (blockColorWrapper.hasTint())
-		{
-			IBiomeWrapper biome = chunk.getBiome(x, y, z);
-			int tintValue;
-			if (blockColorWrapper.hasGrassTint())
-				// grass and green plants
-				tintValue = biome.getGrassTint(0,0);
-			else if (blockColorWrapper.hasFolliageTint())
-				tintValue = biome.getFolliageTint();
-			else
-				//we can reintroduce this with the wrappers
-				tintValue = biome.getWaterTint();
-			
-			colorInt = ColorUtil.multiplyRGBcolors(tintValue | 0xFF000000, colorOfBlock);
-		}
-		else
-			colorInt = colorOfBlock;
-		return colorInt;
+		BlocksToAvoid avoid = config.client().worldGenerator().getBlocksToAvoid();
+		return blockDetail != null && blockDetail.shouldRender(avoid);
 	}
 	
-	
 	/** Is the block at the given blockPos a valid LOD point? */
 	private boolean isLayerValidLodPoint(IChunkWrapper chunk, int x, int y, int z)
 	{
-		if (chunk.isWaterLogged(x, y, z))
-			return true;
-		
-		boolean nonFullAvoidance = config.client().worldGenerator().getBlocksToAvoid().nonFull;
-		boolean noCollisionAvoidance = config.client().worldGenerator().getBlocksToAvoid().noCollision;
-		
-		IBlockShapeWrapper block = chunk.getBlockShapeWrapper(x, y, z);
-		if (block == null) return false;
-		return !block.isToAvoid()
-					   && !(nonFullAvoidance && block.isNonFull())
-					   && !(noCollisionAvoidance && block.hasNoCollision());
-		
+		BlocksToAvoid avoid = config.client().worldGenerator().getBlocksToAvoid();
+		IBlockDetailWrapper block = chunk.getBlockDetail(x, y, z);
+		return block != null && block.shouldRender(avoid);
 	}
 }

src/main/java/com/seibel/lod/core/builders/lodBuilding/LodBuilderConfig.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -39,6 +39,7 @@ public class LodBuilderConfig
 	public boolean useSolidBlocksInColorGen;
 	/** default: server */
 	public DistanceGenerationMode distanceGenerationMode;
+	public boolean quickFillWithVoid;
 	
 	/**
 	 * default settings for a normal chunk <br>
@@ -47,49 +48,18 @@ public class LodBuilderConfig
 	 * useSolidBlocksInColorGen = true <br>
 	 * generationMode = Server <br>
 	 */
-	public LodBuilderConfig()
+	public LodBuilderConfig(DistanceGenerationMode newDistanceGenerationMode)
 	{
 		useHeightmap = false;
 		useBiomeColors = false;
 		useSolidBlocksInColorGen = true;
-		distanceGenerationMode = DistanceGenerationMode.FULL;
-	}
-	
-	/**
-	 * @param newUseHeightmap default = false
-	 * @param newUseBiomeColors default = false
-	 * @param newUseSolidBlocksInBiomeColor default = true
-	 * @param newDistanceGenerationMode default = Server
-	 */
-	public LodBuilderConfig(boolean newUseHeightmap, boolean newUseBiomeColors,
-			boolean newUseSolidBlocksInBiomeColor, DistanceGenerationMode newDistanceGenerationMode)
-	{
-		useHeightmap = newUseHeightmap;
-		useBiomeColors = newUseBiomeColors;
-		useSolidBlocksInColorGen = newUseSolidBlocksInBiomeColor;
+		quickFillWithVoid = false;
 		distanceGenerationMode = newDistanceGenerationMode;
 	}
 	
-	/**
-	 * @param newUseHeightmap default = false
-	 * @param newUseBiomeColors default = false
-	 * @param newUseSolidBlocksInBiomeColor default = true
-	 */
-	public LodBuilderConfig(boolean newUseHeightmap, boolean newUseBiomeColors, boolean newUseSolidBlocksInBiomeColor)
-	{
-		this();
-		useHeightmap = newUseHeightmap;
-		useBiomeColors = newUseBiomeColors;
-		useSolidBlocksInColorGen = newUseSolidBlocksInBiomeColor;
-		distanceGenerationMode = newUseHeightmap ? DistanceGenerationMode.BIOME_ONLY_SIMULATE_HEIGHT : DistanceGenerationMode.BIOME_ONLY;
-	}
-	
-	/**
-	 * @param newDistanceGenerationMode default = Server
-	 */
-	public LodBuilderConfig(DistanceGenerationMode newDistanceGenerationMode)
-	{
-		this();
-		distanceGenerationMode = newDistanceGenerationMode;
+	public static LodBuilderConfig getFillVoidConfig() {
+		LodBuilderConfig config = new LodBuilderConfig(DistanceGenerationMode.NONE);
+		config.quickFillWithVoid = true;
+		return config;
 	}
 }

src/main/java/com/seibel/lod/core/builders/lodBuilding/bufferBuilding/BufferMergeDirectionEnum.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -17,23 +17,19 @@
  *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.seibel.lod.core.wrapperInterfaces.block;
+package com.seibel.lod.core.builders.lodBuilding.bufferBuilding;
 
 /**
+ * EastWest <Br>
+ * NorthSouthOrUpDown
+ *
  * @author James Seibel
- * @version 11-20-2021
+ * @version 2022-4-9
  */
-public interface IBlockShapeWrapper
+public enum BufferMergeDirectionEnum
 {
-	boolean ofBlockToAvoid();
+	EastWest,
 	
-	//-----------------//
-	//Avoidance getters//
-	//-----------------//
-	
-	boolean isNonFull();
-	
-	boolean hasNoCollision();
-	
-	boolean isToAvoid();
-}
+	/** NorthSouth and UpDown are merged since  */
+	NorthSouthOrUpDown
+}

src/main/java/com/seibel/lod/core/builders/lodBuilding/bufferBuilding/BufferQuad.java

@@ -0,0 +1,281 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.builders.lodBuilding.bufferBuilding;
+
+import com.seibel.lod.core.enums.LodDirection;
+import com.seibel.lod.core.util.ColorUtil;
+
+import static com.seibel.lod.core.render.LodRenderer.EVENT_LOGGER;
+
+/**
+ * Represents a renderable quad.
+ *
+ * @author James Seibel
+ * @author ?
+ * @version 4-9-2022
+ */
+public final class BufferQuad
+{
+	final short x;
+	final short y;
+	final short z;
+	short widthEastWest;
+	/** This is both North/South and Up/Down since the merging logic is the same either way */
+	short widthNorthSouthOrUpDown;
+	final int color;
+	final byte skyLight;
+	final byte blockLight;
+	final LodDirection direction;
+
+	boolean hasError = false;
+	
+	BufferQuad(short x, short y, short z, short widthEastWest, short widthNorthSouthOrUpDown,
+			int color, byte skylight, byte blocklight,
+			LodDirection direction)
+	{
+		if (widthEastWest == 0 || widthNorthSouthOrUpDown == 0)
+			throw new IllegalArgumentException("Size 0 quad!");
+		if (widthEastWest < 0 || widthNorthSouthOrUpDown < 0)
+			throw new IllegalArgumentException("Negative sized quad!");
+		
+		this.x = x;
+		this.y = y;
+		this.z = z;
+		this.widthEastWest = widthEastWest;
+		this.widthNorthSouthOrUpDown = widthNorthSouthOrUpDown;
+		this.color = color;
+		this.skyLight = skylight;
+		this.blockLight = blocklight;
+		this.direction = direction;
+	}
+
+	/** a rough but fast calculation */
+	double calculateDistance(double relativeX, double relativeY, double relativeZ)
+	{
+		return Math.pow(relativeX - x, 2) + Math.pow(relativeY - y, 2) + Math.pow(relativeZ - z, 2);
+	}
+	
+	/** compares this quad's position to the given quad */
+	public int compare(BufferQuad quad, BufferMergeDirectionEnum compareDirection)
+	{
+		if (direction != quad.direction)
+			throw new IllegalArgumentException("The other quad is not in the same direction: " + quad.direction + " vs " + direction);
+		
+		if (compareDirection == BufferMergeDirectionEnum.EastWest)
+		{
+			switch (direction.getAxis())
+			{
+			case X:
+				return threeDimensionalCompare(x, y, z, quad.x, quad.y, quad.z);
+			case Y:
+				return threeDimensionalCompare(y, z, x, quad.y, quad.z, quad.x);
+			case Z:
+				return threeDimensionalCompare(z, y, x, quad.z, quad.y, quad.x);
+				
+			default:
+				throw new IllegalArgumentException("Invalid Axis enum: " + direction.getAxis());
+			}
+		}
+		else // if ()
+		{
+			switch (direction.getAxis())
+			{
+			case X:
+				return threeDimensionalCompare(x, z, y, quad.x, quad.z, quad.y);
+			case Y:
+				return threeDimensionalCompare(y, x, z, quad.y, quad.x, quad.z);
+			case Z:
+				return threeDimensionalCompare(z, x, y, quad.z, quad.x, quad.y);
+			
+			default:
+				throw new IllegalArgumentException("Invalid Axis enum: " + direction.getAxis());
+			}
+		}
+	}
+	/**
+	 * Compares two 3D points A and B. <br>
+	 * The X, Y, and Z coordinates can be passed into parameters 0, 1, and 2 in any order
+	 * provided they are in the same order for both A and B. <br>
+	 * With the 0th parameter being the most significant when comparing.
+	 */
+	private static int threeDimensionalCompare(short a0, short a1, short a2, short b0, short b1, short b2)
+	{
+		long a = (long) a0 << 48 | (long) a1 << 32 | (long) a2 << 16;
+		long b = (long) b0 << 48 | (long) b1 << 32 | (long) b2 << 16;
+		return Long.compare(a, b);
+	}
+	
+	
+	/**
+	 * Attempts to merge the given quad into this one.
+	 * @returns true if the quads were merged, false otherwise.
+	 */
+	public boolean tryMerge(BufferQuad quad, BufferMergeDirectionEnum mergeDirection)
+	{
+		if (quad.hasError || this.hasError) return false;
+		// only merge quads that are in the same direction
+		if (direction != quad.direction)
+			return false;
+		
+		// make sure these quads share the same perpendicular axis
+		if ((mergeDirection == BufferMergeDirectionEnum.EastWest && this.y != quad.y) ||
+				(mergeDirection == BufferMergeDirectionEnum.NorthSouthOrUpDown && this.x != quad.x))
+		{
+			return false;
+		}
+		
+		
+		// get the position of each quad to compare against
+		short thisPerpendicularCompareStartPos; // edge perpendicular to the merge direction
+		short thisParallelCompareStartPos; // edge parallel to the merge direction
+		short otherPerpendicularCompareStartPos;
+		short otherParallelCompareStartPos;
+		switch (this.direction.getAxis())
+		{
+		default: // shouldn't normally happen, just here to make the compiler happy
+		case X:
+			if (mergeDirection == BufferMergeDirectionEnum.EastWest)
+			{
+				thisPerpendicularCompareStartPos = this.z;
+				thisParallelCompareStartPos = this.x;
+				
+				otherPerpendicularCompareStartPos = quad.z;
+				otherParallelCompareStartPos = quad.x;
+			}
+			else //if (mergeDirection == MergeDirection.NorthSouthOrUpDown)
+			{
+				thisPerpendicularCompareStartPos = this.y;
+				thisParallelCompareStartPos = this.z;
+				
+				otherPerpendicularCompareStartPos = quad.y;
+				otherParallelCompareStartPos = quad.z;
+			}
+			break;
+		
+		case Y:
+			if (mergeDirection == BufferMergeDirectionEnum.EastWest)
+			{
+				thisPerpendicularCompareStartPos = this.x;
+				thisParallelCompareStartPos = this.z;
+				
+				otherPerpendicularCompareStartPos = quad.x;
+				otherParallelCompareStartPos = quad.z;
+			}
+			else //if (mergeDirection == MergeDirection.NorthSouthOrUpDown)
+			{
+				thisPerpendicularCompareStartPos = this.z;
+				thisParallelCompareStartPos = this.y;
+				
+				otherPerpendicularCompareStartPos = quad.z;
+				otherParallelCompareStartPos = quad.y;
+			}
+			break;
+		
+		case Z:
+			if (mergeDirection == BufferMergeDirectionEnum.EastWest)
+			{
+				thisPerpendicularCompareStartPos = this.x;
+				thisParallelCompareStartPos = this.z;
+				
+				otherPerpendicularCompareStartPos = quad.x;
+				otherParallelCompareStartPos = quad.z;
+			}
+			else //if (mergeDirection == MergeDirection.NorthSouthOrUpDown)
+			{
+				thisPerpendicularCompareStartPos = this.y;
+				thisParallelCompareStartPos = this.z;
+				
+				otherPerpendicularCompareStartPos = quad.y;
+				otherParallelCompareStartPos = quad.z;
+			}
+			break;
+		}
+		
+		// get the width of this quad in the relevant axis
+		short thisPerpendicularCompareWidth;
+		short thisParallelCompareWidth;
+		short otherParallelCompareWidth;
+		if (mergeDirection == BufferMergeDirectionEnum.EastWest)
+		{
+			thisPerpendicularCompareWidth = this.widthEastWest;
+			
+			thisParallelCompareWidth = this.widthNorthSouthOrUpDown;
+			otherParallelCompareWidth = quad.widthNorthSouthOrUpDown;
+		}
+		else
+		{
+			thisPerpendicularCompareWidth = this.widthNorthSouthOrUpDown;
+			
+			thisParallelCompareWidth = this.widthEastWest;
+			otherParallelCompareWidth = quad.widthEastWest;
+		}
+
+		// FIXME: TEMP: Hard limit for width
+		if (thisPerpendicularCompareWidth >= 16) return false;
+		if (Math.floorDiv(otherPerpendicularCompareStartPos, 16)
+				!= Math.floorDiv(thisPerpendicularCompareStartPos, 16)) return false;
+		
+		// check if these quads are adjacent
+		if (thisPerpendicularCompareStartPos + thisPerpendicularCompareWidth < otherPerpendicularCompareStartPos ||
+			thisParallelCompareStartPos != otherParallelCompareStartPos)
+		{
+			// these quads aren't adjacent, they can't be merged
+			return false;
+		}
+		else if (thisPerpendicularCompareStartPos + thisPerpendicularCompareWidth > otherPerpendicularCompareStartPos)
+		{
+			// these quads are overlapping, they can't be merged
+			EVENT_LOGGER.warn("Overlapping quads detected!");
+			quad.hasError = true;
+			this.hasError = true;
+			return false;
+		}
+		
+		
+		// only merge quads that have the same width edges
+		if (thisParallelCompareWidth != otherParallelCompareWidth)
+		{
+			return false;
+		}
+		
+		// do the quads' color, light, etc. match?
+		if (color != quad.color ||
+			skyLight != quad.skyLight ||
+			blockLight != quad.blockLight)
+		{
+			// we can only merge identically colored/lit quads
+			return false;
+		}
+		
+		// merge the two quads
+		if (mergeDirection == BufferMergeDirectionEnum.NorthSouthOrUpDown)
+		{
+			widthNorthSouthOrUpDown += quad.widthNorthSouthOrUpDown;
+		}
+		else // if (mergeDirection == MergeDirection.EastWest)
+		{
+			widthEastWest += quad.widthEastWest;
+		}
+		
+		// merge successful
+		return true;
+	}
+	
+}

src/main/java/com/seibel/lod/core/builders/lodBuilding/bufferBuilding/CubicLodTemplate.java

@@ -0,0 +1,106 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.builders.lodBuilding.bufferBuilding;
+
+import com.seibel.lod.core.enums.rendering.DebugMode;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.objects.opengl.LodBox;
+import com.seibel.lod.core.util.ColorUtil;
+import com.seibel.lod.core.util.DataPointUtil;
+import com.seibel.lod.core.util.LevelPosUtil;
+import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+
+/**
+ * Builds LODs as rectangular prisms.
+ * @author James Seibel
+ * @version 3-19-2022
+ */
+public class CubicLodTemplate
+{
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+
+	public static void addLodToBuffer(long data, long topData, long botData, long[][][] adjData,
+			 boolean[] adjFillBlack, byte detailLevel,int offsetPosX, int offsetOosZ, LodQuadBuilder quadBuilder, DebugMode debugging)
+	{
+		short width = (short) (1 << detailLevel);
+		short x = (short) LevelPosUtil.convert(detailLevel, offsetPosX, LodUtil.BLOCK_DETAIL_LEVEL);
+		short y = DataPointUtil.getDepth(data);
+		short z = (short) LevelPosUtil.convert(detailLevel, offsetOosZ, LodUtil.BLOCK_DETAIL_LEVEL);
+		short dy = (short) (DataPointUtil.getHeight(data) - y);
+		if (dy == 0)
+			return;
+		if (dy < 0)
+		{
+			throw new IllegalArgumentException("Negative y size for the data! Data: " + DataPointUtil.toString(data));
+		}
+		
+		int color;
+		boolean fullBright = false;
+		switch (debugging) {
+			case OFF:
+			case SHOW_WIREFRAME:
+			{
+				float saturationMultiplier = (float)CONFIG.client().graphics().advancedGraphics().getSaturationMultiplier();
+				float brightnessMultiplier = (float)CONFIG.client().graphics().advancedGraphics().getBrightnessMultiplier();
+				if (saturationMultiplier == 1.0 && brightnessMultiplier == 1.0) {
+					color = DataPointUtil.getColor(data);
+				} else {
+					float[] ahsv = ColorUtil.argbToAhsv(DataPointUtil.getColor(data));
+					color = ColorUtil.ahsvToArgb(ahsv[0], ahsv[1], ahsv[2] * saturationMultiplier, ahsv[3] * brightnessMultiplier);
+					//ApiShared.LOGGER.info("Raw color:[{}], AHSV:{}, Out color:[{}]",
+					//		ColorUtil.toString(DataPointUtil.getColor(data)),
+					//		ahsv, ColorUtil.toString(color));
+				}
+				break;
+			}
+			case SHOW_DETAIL:
+			case SHOW_DETAIL_WIREFRAME:
+			{
+				color = LodUtil.DEBUG_DETAIL_LEVEL_COLORS[detailLevel];
+				fullBright = true;
+				break;
+			}
+			case SHOW_GENMODE:
+			case SHOW_GENMODE_WIREFRAME:
+			{
+				color = LodUtil.DEBUG_DETAIL_LEVEL_COLORS[DataPointUtil.getGenerationMode(data)];
+				fullBright = true;
+				break;
+			}
+			case SHOW_OVERLAPPING_QUADS:
+			case SHOW_OVERLAPPING_QUADS_WIREFRAME:
+			{
+				color = ColorUtil.WHITE;
+				fullBright = true;
+				break;
+			}
+			default:
+				throw new IllegalArgumentException("Unknown debug mode: " + debugging);
+		}
+		LodBox.addBoxQuadsToBuilder(quadBuilder, // buffer
+				width, dy, width, // setWidth
+				x, y, z, // setOffset
+				color, // setColor
+				DataPointUtil.getLightSky(data), // setSkyLights
+				fullBright ? 15 : DataPointUtil.getLightBlock(data), // setBlockLights
+				topData, botData, adjData, adjFillBlack); // setAdjData
+	}
+}

src/main/java/com/seibel/lod/core/builders/lodBuilding/bufferBuilding/LodBufferBuilderFactory.java

@@ -0,0 +1,355 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.builders.lodBuilding.bufferBuilding;
+
+import java.time.Duration;
+import java.util.concurrent.*;
+import java.util.concurrent.locks.ReentrantLock;
+
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.logging.SpamReducedLogger;
+import com.seibel.lod.core.objects.Pos2D;
+import com.seibel.lod.core.objects.lod.LodDimension;
+import com.seibel.lod.core.objects.lod.RegionPos;
+import com.seibel.lod.core.objects.opengl.RenderRegion;
+import com.seibel.lod.core.render.LodRenderer;
+import com.seibel.lod.core.render.objects.GLBuffer;
+import com.seibel.lod.core.util.*;
+import com.seibel.lod.core.util.gridList.MovableGridRingList;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+
+/**
+ * This object creates the buffers that are rendered by the LodRenderer.
+ * 
+ * @author James Seibel
+ * @version 12-9-2021
+ */
+public class LodBufferBuilderFactory {
+
+	// TODO: Do some Perf logging of Buffer Building
+	public static final boolean ENABLE_BUFFER_PERF_LOGGING = false;
+	public static final boolean ENABLE_EVENT_LOGGING = false;
+	public static final boolean ENABLE_LAG_SPIKE_LOGGING = false;
+	public static final long LAG_SPIKE_THRESOLD_NS = TimeUnit.NANOSECONDS.convert(16, TimeUnit.MILLISECONDS);
+
+	public static class LagSpikeCatcher {
+
+		long timer = System.nanoTime();
+
+		public LagSpikeCatcher() {
+		}
+
+		public void end(String source) {
+			if (!ENABLE_LAG_SPIKE_LOGGING)
+				return;
+			timer = System.nanoTime() - timer;
+			if (timer > LAG_SPIKE_THRESOLD_NS) {
+				ApiShared.LOGGER.info("LagSpikeCatcher: " + source + " took " + Duration.ofNanos(timer) + "!");
+			}
+		}
+	}
+
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
+
+	/** The thread used to generate new LODs off the main thread. */
+	private static LodThreadFactory mainGenThreadFactory = new LodThreadFactory(
+			LodBufferBuilderFactory.class.getSimpleName() + " - main", Thread.NORM_PRIORITY - 2);
+	public static ExecutorService mainGenThread = Executors.newSingleThreadExecutor(mainGenThreadFactory);
+
+	/** The threads used to generate buffers. */
+	private static LodThreadFactory bufferBuilderThreadFactory = new LodThreadFactory("BufferBuilder",
+			Thread.NORM_PRIORITY - 2);
+	private static int previousBufferBuilderThreads = CONFIG.client().advanced().threading().getNumberOfBufferBuilderThreads();
+	public static ExecutorService bufferBuilderThreads = Executors.newFixedThreadPool(previousBufferBuilderThreads, bufferBuilderThreadFactory);
+
+	/** The thread used to upload buffers. */
+	private static LodThreadFactory bufferUploadThreadFactory = new LodThreadFactory(
+			LodBufferBuilderFactory.class.getSimpleName() + " - upload", Thread.NORM_PRIORITY - 1);
+	public static ExecutorService bufferUploadThread = Executors.newSingleThreadExecutor(bufferUploadThreadFactory);
+	
+	/**
+	 * When buffers are first created they are allocated to this size (in Bytes).
+	 * This size will be too small, more than likely. The buffers will be expanded
+	 * when need be to fit the larger sizes.
+	 */
+	public static final int DEFAULT_MEMORY_ALLOCATION = (LodUtil.LOD_VERTEX_FORMAT.getByteSize() * 3) * 8;
+	public static final int QUADS_BYTE_SIZE = LodUtil.LOD_VERTEX_FORMAT.getByteSize() * (LodRenderer.ENABLE_IBO ? 4 : 6);
+	public static final int MAX_TRIANGLES_PER_BUFFER = (1024 * 1024 * 1)
+			/ (LodUtil.LOD_VERTEX_FORMAT.getByteSize() * 3);
+	public static final int MAX_QUADS_PER_BUFFER = (1024 * 1024 * 1) / QUADS_BYTE_SIZE;
+	public static final int FULL_SIZED_BUFFER = MAX_QUADS_PER_BUFFER * QUADS_BYTE_SIZE;
+
+	public static int skyLightPlayer = 15;
+
+	public MovableGridRingList<RenderRegion> renderRegions = null;
+	
+	/** Size of the buffer builders in bytes last time we created them */
+	public int previousBufferSize = 0;
+	/** Width of the dimension in regions last time we created the buffers */
+	public int previousRegionWidth = 0;
+
+	private boolean builderThreadRunning = false;
+	
+	public ReentrantLock regionsListLock = new ReentrantLock();
+	
+	public LodBufferBuilderFactory() {
+		
+	}
+
+	public void setRegionNeedRegen(int regionX, int regionZ) {
+		MovableGridRingList<RenderRegion> r = renderRegions;
+		if (r==null) return;
+		RenderRegion rr = r.get(regionX, regionZ);
+		if (rr==null) return;
+		rr.setNeedRegen();
+	}
+	
+	/**
+	 * Create a thread to asynchronously generate LOD buffers centered around the
+	 * given camera X and Z. <br>
+	 * This method will write to the drawable near and far buffers. <br>
+	 * After the buildable buffers have been generated they must be swapped with the
+	 * drawable buffers in the LodRenderer to be drawn.
+	 * 
+	 * @return whether it has started a generation task or is blocked
+	 */
+	public boolean updateAndSwapLodBuffersAsync(LodRenderer renderer, LodDimension lodDim, int playerX, int playerY,
+			int playerZ, boolean fullRegen) {
+
+		// only allow one generation process to happen at a time
+		if (builderThreadRunning) return false;
+
+		builderThreadRunning = true;
+
+		Runnable thread = () -> generateLodBuffersThread(renderer, lodDim, playerX, playerY, playerZ, fullRegen);
+		mainGenThread.execute(thread);
+		return true;
+	}
+	
+	private void updateRingList(int playerX, int playerZ, int regionWidth) throws InterruptedException {
+		if (renderRegions != null && regionWidth != renderRegions.getSize()) {
+			renderRegions.clear(RenderRegion::close);
+			renderRegions = null;
+		}
+		LodUtil.checkInterrupts();
+		if (renderRegions == null) {
+			renderRegions = new MovableGridRingList<RenderRegion>(regionWidth/2,
+					LevelPosUtil.getRegion(LodUtil.BLOCK_DETAIL_LEVEL, playerX),
+					LevelPosUtil.getRegion(LodUtil.BLOCK_DETAIL_LEVEL, playerZ));
+			ApiShared.LOGGER.info("============Render Regions rebuilt============");
+		} else {
+			renderRegions.move(LevelPosUtil.getRegion(LodUtil.BLOCK_DETAIL_LEVEL, playerX),
+					LevelPosUtil.getRegion(LodUtil.BLOCK_DETAIL_LEVEL, playerZ), RenderRegion::close);
+		}
+	}
+	
+	private void resetThreadPools(boolean dumpThread) {
+		if (dumpThread) {
+			bufferBuilderThreadFactory.dumpAllThreadStacks();
+			bufferUploadThreadFactory.dumpAllThreadStacks();
+		}
+		bufferBuilderThreads.shutdownNow();
+		bufferUploadThread.shutdownNow();
+		previousBufferBuilderThreads = CONFIG.client().advanced().threading().getNumberOfBufferBuilderThreads();
+		bufferBuilderThreadFactory = new LodThreadFactory("BufferBuilder", Thread.NORM_PRIORITY - 2);
+		bufferBuilderThreads = Executors.newFixedThreadPool(previousBufferBuilderThreads, bufferBuilderThreadFactory);
+		
+		bufferUploadThreadFactory = new LodThreadFactory(
+				LodBufferBuilderFactory.class.getSimpleName() + " - upload", Thread.NORM_PRIORITY - 1);
+		bufferUploadThread = Executors.newSingleThreadExecutor(bufferUploadThreadFactory);
+		
+	}
+	
+	private void generateLodBuffersThread(LodRenderer renderer, LodDimension lodDim, int playerX, int playerY,
+			int playerZ, boolean fullRegen) {
+		//ArrayList<RenderRegion> regionsToCleanup = new ArrayList<RenderRegion>();
+		try {
+			if (previousBufferBuilderThreads != CONFIG.client().advanced().threading().getNumberOfBufferBuilderThreads())
+				resetThreadPools(false);
+			regionsListLock.lockInterruptibly();
+			if (ENABLE_EVENT_LOGGING)
+				ApiShared.LOGGER.info("BufferBuilderStarter locked the region lock! LodDim: [{}], RenderRegion: [{}]",
+					lodDim, renderRegions==null ? "NULL" : renderRegions.toString());
+			long startTime = System.currentTimeMillis();
+
+			boolean doCaveCulling = CONFIG.client().graphics().advancedGraphics().getEnableCaveCulling();
+			doCaveCulling &= !lodDim.dimension.hasCeiling();
+			doCaveCulling &= lodDim.dimension.hasSkyLight();
+			doCaveCulling &= playerY > CONFIG.client().graphics().advancedGraphics().getCaveCullingHeight() + 5;
+			int playerSkylight = MC.getPlayerSkylight(); // if fail returns -1.
+			doCaveCulling &= playerSkylight > 7;
+
+			try {
+				updateRingList(playerX, playerZ, lodDim.getWidth());
+
+				// ================================//
+				// create the nodeToRenderThreads //
+				// ================================//
+
+				skyLightPlayer = MC.getWrappedClientWorld().getSkyLight(playerX, playerY, playerZ);
+				// int minCullingRange =
+				// SingletonHandler.get(ILodConfigWrapperSingleton.class).client().graphics().advancedGraphics().getBacksideCullingRange();
+				// int cullingRangeX = Math.max((int)(1.5 * Math.abs(lastX - playerX)),
+				// minCullingRange);
+				// int cullingRangeZ = Math.max((int)(1.5 * Math.abs(lastZ - playerZ)),
+				// minCullingRange);
+
+				Pos2D minPos = renderRegions.getMinInRange();
+				Pos2D maxPos = renderRegions.getMaxInRange();
+				CompletableFuture<Void> future = CompletableFuture.completedFuture(null);
+
+				try {
+					int numOfJobs = 0;
+					for (int regX = minPos.x; regX < maxPos.x; regX++) {
+						for (int regZ = minPos.y; regZ < maxPos.y; regZ++) {
+							RenderRegion r = renderRegions.get(regX, regZ);
+							RegionPos regPos = new RegionPos(regX, regZ);
+							if (r != null && !r.canRender(lodDim, regPos)) {
+								renderRegions.set(regX, regZ, null);
+								r.close();
+								r = null;
+							}
+
+							if (r == null) {
+								r = new RenderRegion(regPos, lodDim);
+								renderRegions.set(regX, regZ, r);
+							}
+
+							CompletableFuture<Void> newFuture =
+									r.updateStatus(bufferUploadThread, bufferBuilderThreads, fullRegen,
+											playerX, playerZ, doCaveCulling).orElse(null);
+							if (newFuture != null) {
+								future = CompletableFuture.allOf(future, newFuture);
+								numOfJobs++;
+							}
+						}
+					}
+
+					// ================================//
+					//        wait on completion       //
+					// ================================//
+
+					long executeStart = System.currentTimeMillis();
+					try {
+						future.get(1, TimeUnit.MINUTES);
+					} catch (CancellationException ce) {
+						throw new InterruptedException("Future interrupted");
+					} catch (ExecutionException ee) {
+						ApiShared.LOGGER.error("LodBufferBuilder ran into trouble: ", ee.getCause());
+					}
+					long executeEnd = System.currentTimeMillis();
+
+					long endTime = System.currentTimeMillis();
+					long buildTime = endTime - startTime;
+					long executeTime = executeEnd - executeStart;
+					if (ENABLE_BUFFER_PERF_LOGGING)
+						ApiShared.LOGGER.info("Thread Build&Upload(" + numOfJobs + "/"
+								+ (lodDim.getWidth() * lodDim.getWidth()) + (fullRegen ? "FULL" : "") + ") time: " + buildTime
+								+ " ms" + '\n' + "thread execute time: " + executeTime + " ms");
+
+				} catch (InterruptedException ie) {
+					resetThreadPools(false);
+					try {
+						future.get();
+					} catch (Throwable ignored) {
+					}
+				} catch (TimeoutException te) {
+					ApiShared.LOGGER.error("LodBufferBuilder timed out: ", te);
+					resetThreadPools(true);
+				}
+			}
+			catch (RuntimeException e) {
+				ApiShared.LOGGER.error("\"LodNodeBufferBuilder.generateLodBuffersAsync\" ran into trouble: ", e);
+			}
+		}
+		catch (InterruptedException ignored) { }
+		finally {
+			regionsListLock.unlock();
+			if (ENABLE_EVENT_LOGGING) ApiShared.LOGGER.info("BufferBuilderStarter unlocked the region lock!");
+			builderThreadRunning = false;
+		}
+	}
+
+	private final SpamReducedLogger ramLogger = new SpamReducedLogger(1);
+
+	public void dumpBufferMemoryUsage() {
+		if (!ramLogger.canMaybeLog())
+			return;
+		ramLogger.info("Dumping Ram Usage for buffer usage...");
+		StatsMap statsMap = new StatsMap();
+		
+		if (renderRegions == null) {
+			ramLogger.info("Buildable VBOs are null!");
+		} else {
+			for (RenderRegion buffers : renderRegions) {
+				if (buffers == null)
+					continue;
+				buffers.debugDumpStats(statsMap);
+			}
+		}
+		statsMap.incStat("Total Buffers", GLBuffer.count.get());
+		ramLogger.info("================================================");
+		ramLogger.info("Stats: {}", statsMap);
+		ramLogger.info("================================================");
+		ramLogger.incLogTries();
+	}
+
+	// ===============================//
+	// BufferBuilder related methods //
+	// ===============================//
+
+	/**
+	 * Sets the buffers and Vbos to null, forcing them to be recreated <br>
+	 * and destroys any bound OpenGL objects. <br>
+	 * <br>
+	 * <p>
+	 * May have to wait for the bufferLock to open.
+	 */
+	public void destroyBuffers() {
+		ApiShared.LOGGER.info("Destroying LodBufferBuilder...");
+		mainGenThread.shutdownNow();
+		mainGenThread = Executors.newSingleThreadExecutor(mainGenThreadFactory);
+		boolean locked = false;
+		try {
+			locked = regionsListLock.tryLock(5, TimeUnit.SECONDS); // FIXME: For some reason we get a deadlock here sometimes
+		} catch (InterruptedException ignored) {}
+		try {
+			if (renderRegions != null) renderRegions.clear(RenderRegion::close);
+			renderRegions = null;
+		} finally {
+			if (locked) regionsListLock.unlock();
+		}
+		ApiShared.LOGGER.info("LodBufferBuilder destroyed.");
+	}
+
+	/** Get the newly created VBOs
+	 *  Note: SHOULD NEVER MODIFY THE LIST */
+	public MovableGridRingList<RenderRegion> getRenderRegions() {
+		return renderRegions;
+	}
+
+	@Deprecated
+	public void triggerReset() {
+		
+	}
+}

src/main/java/com/seibel/lod/core/builders/lodBuilding/bufferBuilding/LodQuadBuilder.java

@@ -0,0 +1,539 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.builders.lodBuilding.bufferBuilding;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.ListIterator;
+
+import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
+import com.seibel.lod.core.enums.LodDirection;
+import com.seibel.lod.core.enums.LodDirection.Axis;
+import com.seibel.lod.core.enums.config.GpuUploadMethod;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.render.LodRenderer;
+import com.seibel.lod.core.render.objects.GLVertexBuffer;
+import com.seibel.lod.core.util.ColorUtil;
+import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+
+import static com.seibel.lod.core.render.LodRenderer.EVENT_LOGGER;
+
+/**
+ * Used to create the quads before they are converted to renderable buffers.
+ *
+ * @version 2022-4-9
+ */
+public class LodQuadBuilder
+{
+	static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	
+	public final boolean skipQuadsWithZeroSkylight;
+	public final short skyLightCullingBelow;
+	
+	final ArrayList<BufferQuad>[] quads = (ArrayList<BufferQuad>[]) new ArrayList[6];
+	
+	public static final int[][][] DIRECTION_VERTEX_IBO_QUAD = new int[][][]
+		{
+			// X,Z //
+			{ // UP
+				{ 1, 0 }, // 0
+				{ 1, 1 }, // 1
+				{ 0, 1 }, // 2
+				{ 0, 0 }, // 3
+			},
+			{ // DOWN
+				{ 0, 0 }, // 0
+				{ 0, 1 }, // 1
+				{ 1, 1 }, // 2
+				{ 1, 0 }, // 3
+			},
+			
+			// X,Y //
+			{ // NORTH
+				{ 0, 0 }, // 0
+				{ 0, 1 }, // 1
+				{ 1, 1 }, // 2
+
+				{ 1, 0 }, // 3
+			},
+			{ // SOUTH
+				{ 1, 0 }, // 0
+				{ 1, 1 }, // 1
+				{ 0, 1 }, // 2
+
+				{ 0, 0 }, // 3
+			},
+			
+			// Z,Y //
+			{ // WEST
+				{ 0, 0 }, // 0
+				{ 1, 0 }, // 1
+				{ 1, 1 }, // 2
+
+				{ 0, 1 }, // 3
+			},
+			{ // EAST
+				{ 0, 1 }, // 0
+				{ 1, 1 }, // 1
+				{ 1, 0 }, // 2
+
+				{ 0, 0 }, // 3
+			},
+		};
+	public static final int[][][] DIRECTION_VERTEX_QUAD = new int[][][]
+			{
+					// X,Z //
+					{ // UP
+							{ 1, 0 }, // 0
+							{ 1, 1 }, // 1
+							{ 0, 1 }, // 2
+
+							{ 1, 0 }, // 0
+							{ 0, 1 }, // 2
+							{ 0, 0 }, // 3
+					},
+					{ // DOWN
+							{ 0, 0 }, // 0
+							{ 0, 1 }, // 1
+							{ 1, 1 }, // 2
+
+							{ 0, 0 }, // 0
+							{ 1, 1 }, // 2
+							{ 1, 0 }, // 3
+					},
+
+					// X,Y //
+					{ // NORTH
+							{ 0, 0 }, // 0
+							{ 0, 1 }, // 1
+							{ 1, 1 }, // 2
+
+							{ 0, 0 }, // 0
+							{ 1, 1 }, // 2
+							{ 1, 0 }, // 3
+					},
+					{ // SOUTH
+							{ 1, 0 }, // 0
+							{ 1, 1 }, // 1
+							{ 0, 1 }, // 2
+
+							{ 1, 0 }, // 0
+							{ 0, 1 }, // 2
+							{ 0, 0 }, // 3
+					},
+
+					// Z,Y //
+					{ // WEST
+							{ 0, 0 }, // 0
+							{ 1, 0 }, // 1
+							{ 1, 1 }, // 2
+
+							{ 0, 0 }, // 0
+							{ 1, 1 }, // 2
+							{ 0, 1 }, // 3
+					},
+					{ // EAST
+							{ 0, 1 }, // 0
+							{ 1, 1 }, // 1
+							{ 1, 0 }, // 2
+
+							{ 0, 1 }, // 0
+							{ 1, 0 }, // 2
+							{ 0, 0 }, // 3
+					},
+			};
+	
+	
+	public LodQuadBuilder(boolean enableSkylightCulling, int skyLightCullingBelow)
+	{
+		for (int i = 0; i < 6; i++)
+			quads[i] = new ArrayList<>();
+		
+		this.skipQuadsWithZeroSkylight = enableSkylightCulling;
+		this.skyLightCullingBelow = (short) (skyLightCullingBelow - LodBuilder.MIN_WORLD_HEIGHT);
+	}
+	
+	
+	
+	
+	public void addQuadAdj(LodDirection dir, short x, short y, short z,
+			short widthEastWest, short widthNorthSouthOrUpDown,
+			int color, byte skylight, byte blocklight)
+	{
+		if (dir.ordinal() <= LodDirection.DOWN.ordinal())
+			throw new IllegalArgumentException("addQuadAdj() is only for adj direction! Not UP or Down!");
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[dir.ordinal()].add(new BufferQuad(x, y, z, widthEastWest, widthNorthSouthOrUpDown, color, skylight, blocklight, dir));
+	}
+	
+	// XZ
+	public void addQuadUp(short x, short y, short z, short width, short wz, int color, byte skylight, byte blocklight)
+	{
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[LodDirection.UP.ordinal()].add(new BufferQuad(x, y, z, width, wz, color, skylight, blocklight, LodDirection.UP));
+	}
+	
+	public void addQuadDown(short x, short y, short z, short width, short wz, int color, byte skylight, byte blocklight)
+	{
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[LodDirection.DOWN.ordinal()].add(new BufferQuad(x, y, z, width, wz, color, skylight, blocklight, LodDirection.DOWN));
+	}
+	
+	// XY
+	public void addQuadN(short x, short y, short z, short width, short wy, int color, byte skylight, byte blocklight)
+	{
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[LodDirection.NORTH.ordinal()].add(new BufferQuad(x, y, z, width, wy, color, skylight, blocklight, LodDirection.NORTH));
+	}
+	
+	public void addQuadS(short x, short y, short z, short width, short wy, int color, byte skylight, byte blocklight)
+	{
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[LodDirection.SOUTH.ordinal()].add(new BufferQuad(x, y, z, width, wy, color, skylight, blocklight, LodDirection.SOUTH));
+	}
+	
+	// ZY
+	public void addQuadW(short x, short y, short z, short width, short wy, int color, byte skylight, byte blocklight)
+	{
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[LodDirection.WEST.ordinal()].add(new BufferQuad(x, y, z, width, wy, color, skylight, blocklight, LodDirection.WEST));
+	}
+	
+	public void addQuadE(short x, short y, short z, short width, short wy, int color, byte skylight, byte blocklight)
+	{
+		if (skipQuadsWithZeroSkylight && skylight == 0 && y < skyLightCullingBelow)
+			return;
+		quads[LodDirection.EAST.ordinal()].add(new BufferQuad(x, y, z, width, wy, color, skylight, blocklight, LodDirection.EAST));
+	}
+	
+	
+	
+	private static void putVertex(ByteBuffer bb, short x, short y, short z, int color, byte skylight, byte blocklight, int mx, int my, int mz)
+	{
+		skylight %= 16;
+		blocklight %= 16;
+		
+		bb.putShort(x);
+		bb.putShort(y);
+		bb.putShort(z);
+
+		short meta = 0;
+		meta |= (skylight | (blocklight << 4));
+		byte mirco = 0;
+		// mirco offset which is a xyz 2bit value
+		// 0b00 = no offset
+		// 0b01 = positive offset
+		// 0b11 = negative offset
+		// format is: 0b00zzyyxx
+		if (mx != 0) mirco |= mx > 0 ? 0b01 : 0b11;
+		if (my != 0) mirco |= my > 0 ? 0b0100 : 0b1100;
+		if (mz != 0) mirco |= mz > 0 ? 0b010000 : 0b110000;
+		meta |= mirco << 8;
+
+		bb.putShort(meta);
+		byte r = (byte) ColorUtil.getRed(color);
+		byte g = (byte) ColorUtil.getGreen(color);
+		byte b = (byte) ColorUtil.getBlue(color);
+		byte a = (byte) ColorUtil.getAlpha(color);
+		bb.put(r);
+		bb.put(g);
+		bb.put(b);
+		bb.put(a);
+	}
+	
+	private static void putQuad(ByteBuffer bb, BufferQuad quad)
+	{
+		int[][] quadBase = LodRenderer.ENABLE_IBO ? DIRECTION_VERTEX_IBO_QUAD[quad.direction.ordinal()] : DIRECTION_VERTEX_QUAD[quad.direction.ordinal()];
+		short widthEastWest = quad.widthEastWest;
+		short widthNorthSouth = quad.widthNorthSouthOrUpDown;
+		Axis axis = quad.direction.getAxis();
+		for (int i = 0; i < quadBase.length; i++)
+		{
+			short dx, dy, dz;
+			int mx, my, mz;
+			switch (axis)
+			{
+			case X: // ZY
+				dx = 0;
+				dy = quadBase[i][1] == 1 ? widthNorthSouth : 0;
+				dz = quadBase[i][0] == 1 ? widthEastWest : 0;
+				mx = 0;
+				my = quadBase[i][1] == 1 ? 1 : -1;
+				mz = quadBase[i][0] == 1 ? 1 : -1;
+				break;
+			case Y: // XZ
+				dx = quadBase[i][0] == 1 ? widthEastWest : 0;
+				dy = 0;
+				dz = quadBase[i][1] == 1 ? widthNorthSouth : 0;
+				mx = quadBase[i][0] == 1 ? 1 : -1;
+				my = 0;
+				mz = quadBase[i][1] == 1 ? 1 : -1;
+				break;
+			case Z: // XY
+				dx = quadBase[i][0] == 1 ? widthEastWest : 0;
+				dy = quadBase[i][1] == 1 ? widthNorthSouth : 0;
+				dz = 0;
+				mx = quadBase[i][0] == 1 ? 1 : -1;
+				my = quadBase[i][1] == 1 ? 1 : -1;
+				mz = 0;
+				break;
+			default:
+				throw new IllegalArgumentException("Invalid Axis enum: " + axis);
+			}
+			putVertex(bb, (short) (quad.x + dx), (short) (quad.y + dy), (short) (quad.z + dz),
+					quad.hasError ? ColorUtil.RED : quad.color,
+					quad.hasError ? 15 : quad.skyLight,
+					quad.hasError ? 15 : quad.blockLight,
+					mx, my, mz);
+		}
+	}
+	
+	/** Uses Greedy meshing to merge this builder's Quads. */
+	public void mergeQuads()
+	{
+		long mergeCount = 0;
+		long preQuadsCount = getCurrentQuadsCount();
+		if (preQuadsCount <= 1)
+			return;
+		
+		for (int directionIndex = 0; directionIndex < 6; directionIndex++)
+		{
+			mergeCount += mergeQuadsInternal(directionIndex, BufferMergeDirectionEnum.EastWest);
+			
+			// only merge after the top has been merged
+			if (directionIndex == 1)
+			{
+				long pass2 = mergeQuadsInternal(directionIndex, BufferMergeDirectionEnum.NorthSouthOrUpDown);
+				mergeCount += pass2;
+			}
+		}
+		long postQuadsCount = getCurrentQuadsCount();
+		//if (mergeCount != 0)
+		EVENT_LOGGER.debug("Merged {}/{}({}) quads", mergeCount, preQuadsCount, mergeCount / (double) preQuadsCount);
+	}
+	/** Merges all of this builder's quads for the given directionIndex (up, down, left, etc.) in the given direction */
+	private long mergeQuadsInternal(int directionIndex, BufferMergeDirectionEnum mergeDirection)
+	{
+		if (quads[directionIndex].size() <= 1)
+			return 0;
+		
+		quads[directionIndex].sort( (objOne, objTwo) -> objOne.compare(objTwo, mergeDirection) );
+		
+		long mergeCount = 0;
+		ListIterator<BufferQuad> iter = quads[directionIndex].listIterator();
+		BufferQuad currentQuad = iter.next();
+		while (iter.hasNext())
+		{
+			BufferQuad nextQuad = iter.next();
+			
+			if (currentQuad.tryMerge(nextQuad, mergeDirection))
+			{
+				// merge successful, attempt to merge the next quad
+				mergeCount++;
+				iter.set(null);
+			}
+			else
+			{
+				// merge fail, move on to the next quad
+				currentQuad = nextQuad;
+			}
+		}
+		quads[directionIndex].removeIf(o -> o == null);
+		return mergeCount;
+	}
+	
+	
+	
+	public Iterator<ByteBuffer> makeVertexBuffers()
+	{
+		return new Iterator<ByteBuffer>()
+		{
+			final ByteBuffer bb = ByteBuffer.allocateDirect(LodBufferBuilderFactory.FULL_SIZED_BUFFER)
+					.order(ByteOrder.nativeOrder());
+			int dir = skipEmpty(0);
+			int quad = 0;
+			
+			private int skipEmpty(int d)
+			{
+				while (d < 6 && quads[d].isEmpty())
+					d++;
+				return d;
+			}
+			
+			@Override
+			public boolean hasNext()
+			{
+				return dir < 6;
+			}
+			
+			@Override
+			public ByteBuffer next()
+			{
+				if (dir >= 6)
+				{
+					return null;
+				}
+				bb.clear();
+				bb.limit(LodBufferBuilderFactory.FULL_SIZED_BUFFER);
+				while (bb.hasRemaining() && dir < 6)
+				{
+					writeData();
+				}
+				bb.limit(bb.position());
+				bb.rewind();
+				return bb;
+			}
+			
+			private void writeData()
+			{
+				int i = quad;
+				for (; i < quads[dir].size(); i++)
+				{
+					if (!bb.hasRemaining())
+					{
+						break;
+					}
+					putQuad(bb, quads[dir].get(i));
+				}
+				
+				if (i >= quads[dir].size())
+				{
+					quad = 0;
+					dir++;
+					dir = skipEmpty(dir);
+				}
+				else
+				{
+					quad = i;
+				}
+			}
+		};
+	}
+	
+	public interface BufferFiller
+	{
+		/** If true: more data needs to be filled */
+		boolean fill(GLVertexBuffer vbo);
+	}
+	
+	public BufferFiller makeBufferFiller(GpuUploadMethod method)
+	{
+		return new BufferFiller()
+		{
+			int dir = 0;
+			int quad = 0;
+			
+			public boolean fill(GLVertexBuffer vbo)
+			{
+				if (dir >= 6)
+				{
+					vbo.setVertexCount(0);
+					return false;
+				}
+				
+				int numOfQuads = _countRemainingQuads();
+				if (numOfQuads > LodBufferBuilderFactory.MAX_QUADS_PER_BUFFER)
+					numOfQuads = LodBufferBuilderFactory.MAX_QUADS_PER_BUFFER;
+				if (numOfQuads == 0)
+				{
+					vbo.setVertexCount(0);
+					return false;
+				}
+				ByteBuffer bb = vbo.mapBuffer(numOfQuads * LodBufferBuilderFactory.QUADS_BYTE_SIZE, method,
+						LodBufferBuilderFactory.FULL_SIZED_BUFFER);
+				if (bb == null)
+					throw new NullPointerException("mapBuffer returned null");
+				bb.clear();
+				bb.limit(numOfQuads * LodBufferBuilderFactory.QUADS_BYTE_SIZE);
+				while (bb.hasRemaining() && dir < 6)
+				{
+					writeData(bb);
+				}
+				bb.rewind();
+				vbo.unmapBuffer();
+				vbo.setVertexCount(LodRenderer.ENABLE_IBO ? numOfQuads*4 : numOfQuads*6);
+				return dir < 6;
+			}
+			
+			private int _countRemainingQuads()
+			{
+				int a = quads[dir].size() - quad;
+				for (int i = dir + 1; i < quads.length; i++)
+				{
+					a += quads[i].size();
+				}
+				return a;
+			}
+			
+			private void writeData(ByteBuffer bb)
+			{
+				int startQ = quad;
+				
+				int i = startQ;
+				for (i = startQ; i < quads[dir].size(); i++)
+				{
+					if (!bb.hasRemaining())
+					{
+						break;
+					}
+					putQuad(bb, quads[dir].get(i));
+				}
+				
+				if (i >= quads[dir].size())
+				{
+					quad = 0;
+					dir++;
+					while (dir < 6 && quads[dir].isEmpty())
+						dir++;
+				}
+				else
+				{
+					quad = i;
+				}
+			}
+		};
+	}
+	
+	
+	
+	public int getCurrentQuadsCount()
+	{
+		int i = 0;
+		for (ArrayList<BufferQuad> qs : quads)
+			i += qs.size();
+		return i;
+	}
+
+	/** Returns how many Buffers will be needed to render everything in this builder. */
+	public int getCurrentNeededVertexBufferCount()
+	{
+		return LodUtil.ceilDiv(getCurrentQuadsCount(), LodBufferBuilderFactory.MAX_QUADS_PER_BUFFER);
+	}
+
+}

src/main/java/com/seibel/lod/core/builders/worldGeneration/BatchGenerator.java

@@ -0,0 +1,266 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2021 Tom Lee (TomTheFurry) & James Seibel (Original code)
+ *    
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.builders.worldGeneration;
+
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
+import com.seibel.lod.core.enums.config.DistanceGenerationMode;
+import com.seibel.lod.core.enums.config.GenerationPriority;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.objects.PosToGenerateContainer;
+import com.seibel.lod.core.objects.lod.LodDimension;
+import com.seibel.lod.core.util.LevelPosUtil;
+import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
+import com.seibel.lod.core.wrapperInterfaces.worldGeneration.AbstractBatchGenerationEnvionmentWrapper;
+import com.seibel.lod.core.wrapperInterfaces.worldGeneration.AbstractBatchGenerationEnvionmentWrapper.Steps;
+
+public class BatchGenerator {
+
+	public static final boolean ENABLE_GENERATOR_STATS_LOGGING = false;
+
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	private static final IWrapperFactory FACTORY = SingletonHandler.get(IWrapperFactory.class);
+	public AbstractBatchGenerationEnvionmentWrapper generationGroup;
+	public LodDimension targetLodDim;
+	public static final int generationGroupSize = 4;
+	public static int previousThreadCount = CONFIG.client().advanced().threading()._getWorldGenerationThreadPoolSize();
+
+	private int estimatedSampleNeeded = 128;
+	private int estimatedPointsToQueue = 1;
+
+	public BatchGenerator(LodBuilder newLodBuilder, LodDimension newLodDimension) {
+		IWorldWrapper world = LodUtil.getServerWorldFromDimension(newLodDimension.dimension);
+		targetLodDim = newLodDimension;
+		generationGroup = FACTORY.createBatchGenerator(newLodBuilder, newLodDimension, world);
+		MC.sendChatMessage("NOTE: You are currently using Distant Horizon's Batch Chunk Pre-Generator.");
+		ApiShared.LOGGER.info("Batch Chunk Generator initialized");
+	}
+
+	@SuppressWarnings("unused")
+	public void queueGenerationRequests(LodDimension lodDim, LodBuilder lodBuilder) {
+		if (lodDim != targetLodDim) {
+			stop(false);
+			IWorldWrapper dim = LodUtil.getServerWorldFromDimension(lodDim.dimension);
+			generationGroup = FACTORY.createBatchGenerator(lodBuilder, lodDim, dim);
+			targetLodDim = lodDim;
+			ApiShared.LOGGER.info("1.18 Experimental Chunk Generator reinitialized");
+		}
+
+		DistanceGenerationMode mode = CONFIG.client().worldGenerator().getDistanceGenerationMode();
+		int newThreadCount = CONFIG.client().advanced().threading()._getWorldGenerationThreadPoolSize();
+		if (newThreadCount != previousThreadCount) {
+			generationGroup.resizeThreadPool(newThreadCount);
+			previousThreadCount = newThreadCount;
+		}
+		if (estimatedPointsToQueue < newThreadCount)
+			estimatedPointsToQueue = newThreadCount;
+
+		GenerationPriority priority = CONFIG.client().worldGenerator().getGenerationPriority();
+		if (priority == GenerationPriority.AUTO)
+			priority = MC.hasSinglePlayerServer() ? GenerationPriority.FAR_FIRST : GenerationPriority.NEAR_FIRST;
+
+		generationGroup.updateAllFutures();
+		if (!MC.hasSinglePlayerServer())
+			return;
+		if (!LodUtil.checkRamUsage(0.1, 64)) return;
+		
+		int eventsCount = generationGroup.getEventCount();
+		// If we still all jobs running, return.
+		if (eventsCount >= estimatedPointsToQueue) {
+			estimatedPointsToQueue--;
+			if (estimatedPointsToQueue < newThreadCount)
+				estimatedPointsToQueue = newThreadCount;
+			return;
+		}
+
+		final int targetToGenerate = estimatedPointsToQueue - eventsCount;
+		int toGenerate = targetToGenerate;
+		int positionGoneThough = 0;
+
+		// round the player's block position down to the nearest chunk BlockPos
+		int playerPosX = MC.getPlayerBlockPos().getX();
+		int playerPosZ = MC.getPlayerBlockPos().getZ();
+		double runTimeRatio = CONFIG.client().advanced().threading()._getWorldGenerationPartialRunTime();
+
+		PosToGenerateContainer posToGenerate = lodDim.getPosToGenerate(estimatedSampleNeeded, playerPosX, playerPosZ,
+				priority, mode);
+
+		if (eventsCount == 0 && posToGenerate.getNumberOfPos() >= estimatedSampleNeeded) {
+			estimatedPointsToQueue++;
+			if (estimatedPointsToQueue > newThreadCount * 10)
+				estimatedPointsToQueue = newThreadCount * 10;
+		}
+
+		// ApiShared.LOGGER.info("PosToGenerate: {}", posToGenerate);
+
+		// Find the max number of iterations we need to go though.
+		// We are checking one FarPos, and one NearPos per iterations. This ensure we
+		// aren't just
+		// always picking one or the other.
+		Steps targetStep;
+		switch (mode) {
+		case NONE:
+			targetStep = Steps.Empty; // NOTE: Only load in existing chunks. No new chunk generation
+			break;
+		case BIOME_ONLY:
+			targetStep = Steps.Biomes; // NOTE: No block. Require fake height in LodBuilder
+			break;
+		case BIOME_ONLY_SIMULATE_HEIGHT:
+			targetStep = Steps.Noise; // NOTE: Stone only. Require fake surface
+			break;
+		case SURFACE:
+			targetStep = Steps.Surface; // Carvers or Surface???
+			break;
+		case FEATURES:
+		case FULL:
+			targetStep = Steps.Features;
+			break;
+		default:
+			assert false;
+			return;
+		}
+
+		if (ENABLE_GENERATOR_STATS_LOGGING)
+			ApiShared.LOGGER.info("WorldGen. Near:" + posToGenerate.getNumberOfNearPos() + " Far:"
+					+ posToGenerate.getNumberOfFarPos());
+		if (priority == GenerationPriority.FAR_FIRST || priority == GenerationPriority.BALANCED) {
+
+			int nearCount = posToGenerate.getNumberOfNearPos();
+			int farCount = posToGenerate.getNumberOfFarPos();
+			if (ENABLE_GENERATOR_STATS_LOGGING)
+				ApiShared.LOGGER.info("WorldGen. Near:" + nearCount + " Far:" + farCount);
+			int maxIteration = Math.max(nearCount, farCount);
+			for (int i = 0; i < maxIteration; i++) {
+
+				// We have farPos to go though
+				if (i < farCount && posToGenerate.getNthDetail(i, false) != 0) {
+					positionGoneThough++;
+					byte detailLevel = (byte) (posToGenerate.getNthDetail(i, false) - 1);
+					int chunkX = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosX(i, false));
+					int chunkZ = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosZ(i, false));
+					int genSize = detailLevel > LodUtil.CHUNK_DETAIL_LEVEL ? 0 : generationGroupSize;
+					if (generationGroup.tryAddPoint(chunkX, chunkZ, genSize, targetStep, false, runTimeRatio)) {
+						toGenerate--;
+					}
+				}
+				if (toGenerate <= 0)
+					break;
+
+				// We have nearPos to go though
+				if (i < nearCount && posToGenerate.getNthDetail(i, true) != 0) {
+					positionGoneThough++;
+					byte detailLevel = (byte) (posToGenerate.getNthDetail(i, true) - 1);
+					int chunkX = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosX(i, true));
+					int chunkZ = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosZ(i, true));
+					int genSize = detailLevel > LodUtil.CHUNK_DETAIL_LEVEL ? 0 : generationGroupSize;
+					if (generationGroup.tryAddPoint(chunkX, chunkZ, genSize, targetStep, true, runTimeRatio)) {
+						toGenerate--;
+					}
+				}
+
+				if (toGenerate <= 0)
+					break;
+			}
+		} else {
+			int nearCount = posToGenerate.getNumberOfNearPos();
+			for (int i = 0; i < nearCount; i++) {
+
+				// We have nearPos to go though
+				if (posToGenerate.getNthDetail(i, true) != 0) {
+					positionGoneThough++;
+					byte detailLevel = (byte) (posToGenerate.getNthDetail(i, true) - 1);
+					int chunkX = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosX(i, true));
+					int chunkZ = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosZ(i, true));
+					int genSize = detailLevel > LodUtil.CHUNK_DETAIL_LEVEL ? 0 : generationGroupSize;
+					if (generationGroup.tryAddPoint(chunkX, chunkZ, genSize, targetStep, true, runTimeRatio)) {
+						toGenerate--;
+					}
+					if (toGenerate <= 0)
+						break;
+				}
+			}
+			// Only do far gen if toGenerate is non 0 and that we have requested all samples
+			// we can get.
+			if (toGenerate > 0 && estimatedSampleNeeded > posToGenerate.getNumberOfPos()) {
+				int farCount = posToGenerate.getNumberOfFarPos();
+				for (int i = 0; i < farCount; i++) {
+					// We have farPos to go though
+					if (posToGenerate.getNthDetail(i, false) != 0) {
+						positionGoneThough++;
+						byte detailLevel = (byte) (posToGenerate.getNthDetail(i, false) - 1);
+						int chunkX = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosX(i, false));
+						int chunkZ = LevelPosUtil.getChunkPos(detailLevel, posToGenerate.getNthPosZ(i, false));
+						int genSize = detailLevel > LodUtil.CHUNK_DETAIL_LEVEL ? 0 : generationGroupSize;
+						if (generationGroup.tryAddPoint(chunkX, chunkZ, genSize, targetStep, false, runTimeRatio)) {
+							toGenerate--;
+						}
+					}
+					if (toGenerate <= 0)
+						break;
+				}
+			}
+		}
+
+		if (targetToGenerate != toGenerate && ENABLE_GENERATOR_STATS_LOGGING) {
+			if (toGenerate <= 0) {
+				ApiShared.LOGGER.info(
+						"WorldGenerator: Sampled " + posToGenerate.getNumberOfPos() + " out of " + estimatedSampleNeeded
+								+ " points, started all targeted " + targetToGenerate + " generations.");
+			} else {
+				ApiShared.LOGGER.info("WorldGenerator: Sampled " + posToGenerate.getNumberOfPos() + " out of "
+						+ estimatedSampleNeeded + " points, started " + (targetToGenerate - toGenerate)
+						+ " out of targeted " + targetToGenerate + " generations.");
+			}
+		}
+
+		if (toGenerate > 0 && estimatedSampleNeeded <= posToGenerate.getNumberOfPos()) {
+			// We failed to generate enough points from the samples.
+			// Let's increase the estimatedSampleNeeded.
+			estimatedSampleNeeded *= 1.3;
+			// Ensure wee don't go to basically infinity
+			if (estimatedSampleNeeded > 32768)
+				estimatedSampleNeeded = 32768;
+			if (ENABLE_GENERATOR_STATS_LOGGING)
+				ApiShared.LOGGER.info("WorldGenerator: Increasing estimatedSampleNeeeded to " + estimatedSampleNeeded);
+
+		} else if (toGenerate <= 0 && positionGoneThough * 1.5 < posToGenerate.getNumberOfPos()) {
+			// We haven't gone though half of them and it's already enough.
+			// Let's shink the estimatedSampleNeeded.
+			estimatedSampleNeeded /= 1.2;
+			// Ensure we don't go to near zero.
+			if (estimatedSampleNeeded < 4)
+				estimatedSampleNeeded = 4;
+			if (ENABLE_GENERATOR_STATS_LOGGING)
+				ApiShared.LOGGER.info("WorldGenerator: Decreasing estimatedSampleNeeeded to " + estimatedSampleNeeded);
+		}
+
+	}
+
+	public void stop(boolean blocking) {
+		ApiShared.LOGGER.info("1.18 Experimental Chunk Generator shutting down...");
+		generationGroup.stop(blocking);
+	}
+
+}

src/main/java/com/seibel/lod/core/builders/worldGeneration/LodWorldGenerator.java

@@ -1,373 +0,0 @@
-/*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
- *    licensed under the GNU GPL v3 License.
- *
- *    Copyright (C) 2020  James Seibel
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU General Public License as published by
- *    the Free Software Foundation, version 3.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU General Public License for more details.
- *
- *    You should have received a copy of the GNU General Public License
- *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.seibel.lod.core.builders.worldGeneration;
-
-import java.util.HashSet;
-import java.util.Set;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.atomic.AtomicInteger;
-
-import com.google.common.util.concurrent.ThreadFactoryBuilder;
-import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
-import com.seibel.lod.core.enums.config.DistanceGenerationMode;
-import com.seibel.lod.core.objects.PosToGenerateContainer;
-import com.seibel.lod.core.objects.lod.LodDimension;
-import com.seibel.lod.core.util.LevelPosUtil;
-import com.seibel.lod.core.util.LodThreadFactory;
-import com.seibel.lod.core.util.LodUtil;
-import com.seibel.lod.core.util.SingletonHandler;
-import com.seibel.lod.core.wrapperInterfaces.IVersionConstants;
-import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
-import com.seibel.lod.core.wrapperInterfaces.chunk.AbstractChunkPosWrapper;
-import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
-import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
-import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
-import com.seibel.lod.core.wrapperInterfaces.worldGeneration.AbstractExperimentalWorldGeneratorWrapper;
-import com.seibel.lod.core.wrapperInterfaces.worldGeneration.AbstractWorldGeneratorWrapper;
-
-/**
- * A singleton that handles all long distance LOD world generation.
- * @author Leonardo Amato
- * @author James Seibel
- * @version 12-11-2021
- */
-public class LodWorldGenerator
-{
-	private static final IMinecraftWrapper MC = SingletonHandler.get(IMinecraftWrapper.class);
-	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
-	private static final IWrapperFactory WRAPPER_FACTORY = SingletonHandler.get(IWrapperFactory.class);
-	private static final IVersionConstants VERSION_CONSTANTS = SingletonHandler.get(IVersionConstants.class);
-	
-	
-	/** This holds the thread used to create LOD generation requests off the main thread. */
-	private final ExecutorService mainGenThread = Executors.newSingleThreadExecutor(new LodThreadFactory(this.getClass().getSimpleName() + " world generator"));
-	private ExecutorService genSubThreads = Executors.newFixedThreadPool(CONFIG.client().advanced().threading().getNumberOfWorldGenerationThreads(),
-			new ThreadFactoryBuilder().setNameFormat("Gen-Worker-Thread-%d").build());
-	
-	
-	/** we only want to queue up one generator thread at a time */
-	private boolean generatorThreadRunning = false;
-	
-	/**
-	 * This keeps track of how many chunk generation requests are on going. This is
-	 * to limit how many chunks are queued at once. To prevent chunks from being
-	 * generated for a long time in an area the player is no longer in.
-	 */
-	public final AtomicInteger numberOfChunksWaitingToGenerate = new AtomicInteger(0);
-	
-	public final Set<AbstractChunkPosWrapper> positionsWaitingToBeGenerated = new HashSet<>();
-	
-	/**
-	 * Singleton copy of this object
-	 */
-	public static final LodWorldGenerator INSTANCE = new LodWorldGenerator();
-	public AbstractExperimentalWorldGeneratorWrapper experimentalWorldGenerator;
-	
-	private LodWorldGenerator() {}
-	
-	/**
-	 * Queues up LodNodeGenWorkers for the given lodDimension.
-	 * renderer needed so the LodNodeGenWorkers can flag that the
-	 * buffers need to be rebuilt.
-	 */
-	public void queueGenerationRequests(LodDimension lodDim, LodBuilder lodBuilder)
-	{
-		
-		IWorldWrapper world = LodUtil.getServerWorldFromDimension(lodDim.dimension);
-		
-		// TODO: Rename the config option
-		if (CONFIG.client().worldGenerator().getAllowUnstableFeatureGeneration()) {
-			if (experimentalWorldGenerator == null) {
-				experimentalWorldGenerator = WRAPPER_FACTORY.createExperimentalWorldGenerator(lodBuilder, lodDim, world);
-				if (experimentalWorldGenerator == null) CONFIG.client().worldGenerator().setAllowUnstableFeatureGeneration(false);
-			}
-		} else {
-			if (experimentalWorldGenerator != null) {
-				experimentalWorldGenerator.stop();
-				experimentalWorldGenerator = null;
-			}
-		}
-		
-		if (experimentalWorldGenerator != null) {
-			experimentalWorldGenerator.queueGenerationRequests(lodDim, lodBuilder);
-			return;
-		}
-		
-		// TODO: This currently doesn't use the DetailDistanceUtil.getDistanceGenerationMode(int detail) to get the mode.
-		// This is fine currently since DistanceGenerationMode doesn't care about the detail level for now.
-		// However, If that was to be changed, This will need to be fixed.
-		DistanceGenerationMode mode = CONFIG.client().worldGenerator().getDistanceGenerationMode();
-		
-		if (mode != DistanceGenerationMode.NONE
-				&& !generatorThreadRunning
-				&& MC.hasSinglePlayerServer())
-		{
-			// the thread is now running, don't queue up another thread
-			generatorThreadRunning = true;
-		
-			/**
-			 * How many chunks to generate outside the player's view distance at one
-			 * time. (or more specifically how many requests to make at one time). I
-			 * multiply by 8 to make sure there is always a buffer of chunk requests, to
-			 * make sure the CPU is always busy, and we can generate LODs as quickly as
-			 * possible.
-			 */
-			int genRequestPerThread = VERSION_CONSTANTS.getWorldGenerationCountPerThread();
-			int maxChunkGenRequests;
-			if (VERSION_CONSTANTS.isWorldGeneratorSingleThreaded(mode))
-				maxChunkGenRequests = CONFIG.client().advanced().threading().getNumberOfWorldGenerationThreads() * genRequestPerThread;
-			else maxChunkGenRequests = genRequestPerThread;
-			
-			Runnable generatorFunc = (() ->
-			{
-				try
-				{
-					// round the player's block position down to the nearest chunk BlockPos
-					int playerPosX = MC.getPlayerBlockPos().getX();
-					int playerPosZ = MC.getPlayerBlockPos().getZ();
-					
-					
-					//=======================================//
-					// fill in positionsWaitingToBeGenerated //
-					//=======================================//
-					
-					IWorldWrapper serverWorld = LodUtil.getServerWorldFromDimension(lodDim.dimension);
-					
-					PosToGenerateContainer posToGenerate = lodDim.getPosToGenerate(
-							maxChunkGenRequests,
-							playerPosX,
-							playerPosZ);
-					
-					byte detailLevel;
-					int posX;
-					int posZ;
-					int nearIndex = 0;
-					int farIndex = 0;
-					
-					for (int i = 0; i < posToGenerate.getNumberOfPos(); i++)
-					{
-						// I wish there was a way to compress this code, but I'm not aware of 
-						// an easy way to do so.
-						
-						// add the near positions
-						if (nearIndex < posToGenerate.getNumberOfNearPos() && posToGenerate.getNthDetail(nearIndex, true) != 0)
-						{
-							detailLevel = (byte) (posToGenerate.getNthDetail(nearIndex, true) - 1);
-							posX = posToGenerate.getNthPosX(nearIndex, true);
-							posZ = posToGenerate.getNthPosZ(nearIndex, true);
-							nearIndex++;
-							
-							AbstractChunkPosWrapper chunkPos = WRAPPER_FACTORY.createChunkPos(LevelPosUtil.getChunkPos(detailLevel, posX), LevelPosUtil.getChunkPos(detailLevel, posZ));
-							
-							// prevent generating the same chunk multiple times
-							if (positionsWaitingToBeGenerated.contains(chunkPos))
-								continue;
-							
-							// don't add more to the generation queue then allowed
-							if (numberOfChunksWaitingToGenerate.get() >= maxChunkGenRequests)
-								break;
-							
-							positionsWaitingToBeGenerated.add(chunkPos);
-							numberOfChunksWaitingToGenerate.addAndGet(1);
-							queueWork(chunkPos, mode, lodBuilder, lodDim, serverWorld);
-						}
-						
-						
-						// add the far positions
-						if (farIndex < posToGenerate.getNumberOfFarPos() && posToGenerate.getNthDetail(farIndex, false) != 0)
-						{
-							detailLevel = (byte) (posToGenerate.getNthDetail(farIndex, false) - 1);
-							posX = posToGenerate.getNthPosX(farIndex, false);
-							posZ = posToGenerate.getNthPosZ(farIndex, false);
-							farIndex++;
-							
-							AbstractChunkPosWrapper chunkPos = WRAPPER_FACTORY.createChunkPos(LevelPosUtil.getChunkPos(detailLevel, posX), LevelPosUtil.getChunkPos(detailLevel, posZ));
-							
-							// don't add more to the generation queue then allowed
-							if (numberOfChunksWaitingToGenerate.get() >= maxChunkGenRequests)
-								continue;
-							//break;
-							
-							// prevent generating the same chunk multiple times
-							if (positionsWaitingToBeGenerated.contains(chunkPos))
-								continue;
-							
-							positionsWaitingToBeGenerated.add(chunkPos);
-							numberOfChunksWaitingToGenerate.addAndGet(1);
-							queueWork(chunkPos, mode, lodBuilder, lodDim, serverWorld);
-						}
-					}
-					
-				}
-				catch (RuntimeException e)
-				{
-					// this shouldn't ever happen, but just in case
-					e.printStackTrace();
-				}
-				finally
-				{
-					generatorThreadRunning = false;
-				}
-			});
-			
-			if (VERSION_CONSTANTS.isWorldGeneratorSingleThreaded(mode))
-			{
-				generatorFunc.run();
-			}
-			else
-			{
-				mainGenThread.execute(generatorFunc);
-			}
-		} // if distanceGenerationMode != DistanceGenerationMode.NONE && !generatorThreadRunning
-	} // queueGenerationRequests
-	
-	private void queueWork(AbstractChunkPosWrapper newPos, DistanceGenerationMode newGenerationMode,
-			LodBuilder newLodBuilder,
-			LodDimension newLodDimension, IWorldWrapper serverWorld)
-	{
-		// just a few sanity checks
-		if (newPos == null)
-			throw new IllegalArgumentException("LodChunkGenWorker must have a non-null ChunkPos");
-		
-		if (newLodBuilder == null)
-			throw new IllegalArgumentException("LodChunkGenThread requires a non-null LodChunkBuilder");
-		
-		if (newLodDimension == null)
-			throw new IllegalArgumentException("LodChunkGenThread requires a non-null LodDimension");
-		
-		if (serverWorld == null)
-			throw new IllegalArgumentException("LodChunkGenThread requires a non-null ServerWorld");
-		
-		Runnable method = (() -> {generateChunk(newPos, newGenerationMode,
-				newLodBuilder, newLodDimension, serverWorld);});
-		
-		if (VERSION_CONSTANTS.isWorldGeneratorSingleThreaded(newGenerationMode))
-		{
-			// --Note: This is now using version constants--
-			// if we are using FULL generation there is no reason
-			// to queue up a bunch of generation requests,
-			// because MC's internal server (as of 1.16.5) only
-			// responds with a single thread. And we don't
-			// want to cause more lag than necessary or queue up
-			// requests that may end up being unneeded.
-			// In 1.17+, world generation becomes completely single
-			// threaded. So to allow that, we check the boolean for
-			// whether the wrapper requires single thread
-			method.run();
-		}
-		else
-		{
-			// Every other method can
-			// be done asynchronously
-			genSubThreads.execute(method);
-		}
-		
-		// useful for debugging
-//    	ClientProxy.LOGGER.info(thread.lodDim.getNumberOfLods());
-//    	ClientProxy.LOGGER.info(genThreads.toString());
-	}
-	
-	private void generateChunk(AbstractChunkPosWrapper pos, DistanceGenerationMode generationMode, 
-			LodBuilder newLodBuilder, LodDimension lodDim, IWorldWrapper worldWrapper)
-	{
-		// try
-		{
-			AbstractWorldGeneratorWrapper worldGenWrapper = WRAPPER_FACTORY.createWorldGenerator(newLodBuilder, lodDim, worldWrapper);
-			// only generate LodChunks if they can
-			// be added to the current LodDimension
-			
-			if (lodDim.regionIsInRange(pos.getX() / LodUtil.REGION_WIDTH_IN_CHUNKS, pos.getZ() / LodUtil.REGION_WIDTH_IN_CHUNKS))
-			{
-				switch (generationMode)
-				{
-				case NONE:
-					// don't generate
-					break;
-				case BIOME_ONLY:
-				case BIOME_ONLY_SIMULATE_HEIGHT:
-					// fastest
-					worldGenWrapper.generateBiomesOnly(pos, generationMode);
-					break;
-				case SURFACE:
-					// faster
-					worldGenWrapper.generateSurface(pos);
-					break;
-				case FEATURES:
-					// fast
-					worldGenWrapper.generateFeatures(pos);
-					break;
-				case FULL:
-					// very slow
-					worldGenWrapper.generateFull(pos);
-					break;
-				}
-
-//				boolean dataExistence = lodDim.doesDataExist(new LevelPos((byte) 3, pos.x, pos.z));
-//				if (dataExistence)
-//					ClientProxy.LOGGER.info(pos.x + " " + pos.z + " Success!");
-//				else
-//					ClientProxy.LOGGER.info(pos.x + " " + pos.z);
-
-				// shows the pool size, active threads, queued tasks and completed tasks
-//				ClientProxy.LOGGER.info(genThreads.toString());
-				
-			}// if in range
-		}
-		// catch (Exception e)
-		// {
-		// 	ClientApi.LOGGER.error(LodWorldGenerator.class.getSimpleName() + ": ran into an error: " + e.getMessage());
-		// 	e.printStackTrace();
-		// }
-		// finally
-		{
-			// decrement how many threads are running
-			LodWorldGenerator.INSTANCE.numberOfChunksWaitingToGenerate.addAndGet(-1);
-			
-			// this position is no longer being generated
-			LodWorldGenerator.INSTANCE.positionsWaitingToBeGenerated.remove(pos);
-		}
-	}// run
-	
-	/**
-	 * Stops the current genThreads if they are running
-	 * and then recreates the Executor service. <br><br>
-	 * <p>
-	 * This is done to clear any outstanding tasks
-	 * that may exist after the player leaves their current world.
-	 * If this isn't done unfinished tasks may be left in the queue
-	 * preventing new LodChunks form being generated.
-	 */
-	public void restartExecutorService()
-	{
-		if (experimentalWorldGenerator != null) {
-			experimentalWorldGenerator.stop();
-			experimentalWorldGenerator = null;
-		}
-		
-		if (genSubThreads != null && !genSubThreads.isShutdown())
-		{
-			genSubThreads.shutdownNow();
-		}
-		genSubThreads = Executors.newFixedThreadPool(CONFIG.client().advanced().threading().getNumberOfWorldGenerationThreads(),
-				new ThreadFactoryBuilder().setNameFormat("Gen-Worker-Thread-%d").build());
-	}
-	
-}

src/main/java/com/seibel/lod/core/config/ConfigAnnotations.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.config;
 
 import java.lang.annotation.ElementType;
@@ -7,44 +26,40 @@ import java.lang.annotation.Target;
 
 /**
  * Where the annotations for the config are defined
+ * If there is no annotation then the config will not touch it
  *
- * @author coolGi2007
- * @version 12-28-2021
+ * REMOVED IN a1.7
+ *
+ * @author coolGi
+ * @version 02-07-2022
  */
+@Deprecated
 public class ConfigAnnotations {
-    /** a textField, button, etc. that can be interacted with */
+    /** A textField, button, etc. that can be interacted with */
     @Retention(RetentionPolicy.RUNTIME)
     @Target(ElementType.FIELD)
     public @interface Entry
     {
         String name() default "";
-
+        
+        @Deprecated
         int width() default 150;
 
+        @Deprecated
         double minValue() default Double.MIN_NORMAL;
 
+        @Deprecated
         double maxValue() default Double.MAX_VALUE;
+
     }
 
-
-    @Retention(RetentionPolicy.RUNTIME)
-    @Target(ElementType.FIELD)
-    public @interface ScreenEntry
-    {
-        String name() default "";
-
-        int width() default 100;
-    }
-
-
-    /** Used when sorting the configs in the menu */
+    /** For making categories */
     @Retention(RetentionPolicy.RUNTIME)
     @Target(ElementType.FIELD)
     public @interface Category
     {
-        String value();
-    }
 
+    }
 
     /** Makes text (looks like @Entry but dosnt save and has no button */
     @Retention(RetentionPolicy.RUNTIME)
@@ -53,4 +68,26 @@ public class ConfigAnnotations {
     {
 
     }
+
+    /**
+     * Adds a comment to the file,
+     * This should only be used in special cases where comments from an entry cant reach
+     */
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.FIELD)
+    public @interface FileComment
+    {
+
+    }
+
+    /** DONT USE AS IT WILL BE REMOVED IN THE REWORK OF THE CONFIG */
+    @Deprecated
+    @Retention(RetentionPolicy.RUNTIME)
+    @Target(ElementType.FIELD)
+    public @interface ScreenEntry
+    {
+        String name() default "";
+
+        int width() default 100;
+    }
 }

src/main/java/com/seibel/lod/core/dataFormat/BlockDataFormat.java

@@ -1,502 +0,0 @@
-package com.seibel.lod.core.dataFormat;
-
-import com.seibel.lod.core.enums.config.DistanceGenerationMode;
-import com.seibel.lod.core.util.ColorUtil;
-import com.seibel.lod.core.util.DetailDistanceUtil;
-import com.seibel.lod.core.util.ThreadMapUtil;
-
-import static com.seibel.lod.core.builders.bufferBuilding.LodBufferBuilderFactory.skyLightPlayer;
-
-public class BlockDataFormat
-{
-	/*
-	|a  |a  |a  |a  |r  |r  |r  |r   |
-
-	|r  |r  |r  |r  |g  |g  |g  |g  |
-
-	|g  |g  |g  |g  |b  |b  |b  |b  |
-
-	|b  |b  |b  |b  |h  |h  |h  |h  |
-
-	|h  |h  |h  |h  |h  |h  |d  |d  |
-
-	|d  |d  |d  |d  |d  |d  |d  |d  |
-
-	|bl |bl |bl |bl |sl |sl |sl |sl |
-
-	|l  |l  |f  |g  |g  |g  |v  |e  |
-	
-	
-	 */
-	
-	// Reminder: bytes have range of [-128, 127].
-	// When converting to or from an int a 128 should be added or removed.
-	// If there is a bug with color then it's probably caused by this.
-	
-	//To be used in the future for negative value
-	//public final static int MIN_DEPTH = -64;
-	//public final static int MIN_HEIGHT = -64;
-	public final static int EMPTY_DATA = 0;
-	public static final short VERTICAL_OFFSET = -64;
-	public static int WORLD_HEIGHT = 1024;
-	
-	public final static int ALPHA_DOWNSIZE_SHIFT = 4;
-	
-	//public final static int BLUE_COLOR_SHIFT = 0;
-	//public final static int GREEN_COLOR_SHIFT = 8;
-	//public final static int RED_COLOR_SHIFT = 16;
-	//public final static int ALPHA_COLOR_SHIFT = 24;
-	
-	public final static int BLUE_SHIFT = 36;
-	public final static int GREEN_SHIFT = BLUE_SHIFT + 8;
-	public final static int RED_SHIFT = BLUE_SHIFT + 16;
-	public final static int ALPHA_SHIFT = BLUE_SHIFT + 24;
-	
-	public final static int COLOR_SHIFT = 36;
-	
-	public final static int HEIGHT_SHIFT = 26;
-	public final static int DEPTH_SHIFT = 16;
-	public final static int BLOCK_LIGHT_SHIFT = 12;
-	public final static int SKY_LIGHT_SHIFT = 8;
-	//public final static int LIGHTS_SHIFT = SKY_LIGHT_SHIFT;
-	//public final static int VERTICAL_INDEX_SHIFT = 6;
-	public final static int FLAG_SHIFT = 5;
-	public final static int GEN_TYPE_SHIFT = 2;
-	public final static int VOID_SHIFT = 1;
-	public final static int EXISTENCE_SHIFT = 0;
-	
-	public final static long ALPHA_MASK = 0b1111;
-	public final static long RED_MASK = 0b1111_1111;
-	public final static long GREEN_MASK = 0b1111_1111;
-	public final static long BLUE_MASK = 0b1111_1111;
-	public final static long COLOR_MASK = 0b11111111_11111111_11111111;
-	public final static long HEIGHT_MASK = 0b11_1111_1111;
-	public final static long DEPTH_MASK = 0b11_1111_1111;
-	//public final static long LIGHTS_MASK = 0b1111_1111;
-	public final static long BLOCK_LIGHT_MASK = 0b1111;
-	public final static long SKY_LIGHT_MASK = 0b1111;
-	//public final static long VERTICAL_INDEX_MASK = 0b11;
-	public final static long FLAG_MASK = 0b1;
-	public final static long GEN_TYPE_MASK = 0b111;
-	public final static long VOID_MASK = 1;
-	public final static long EXISTENCE_MASK = 1;
-	
-	
-	public static long createVoidDataPoint(int generationMode)
-	{
-		long dataPoint = 0;
-		dataPoint += (generationMode & GEN_TYPE_MASK) << GEN_TYPE_SHIFT;
-		dataPoint += VOID_MASK << VOID_SHIFT;
-		dataPoint += EXISTENCE_MASK << EXISTENCE_SHIFT;
-		return dataPoint;
-	}
-	
-	public static long createDataPoint(int height, int depth, int color, int lightSky, int lightBlock, int generationMode, boolean flag)
-	{
-		return createDataPoint(
-				ColorUtil.getAlpha(color),
-				ColorUtil.getRed(color),
-				ColorUtil.getGreen(color),
-				ColorUtil.getBlue(color),
-				height, depth, lightSky, lightBlock, generationMode, flag);
-	}
-	
-	public static long createDataPoint(int alpha, int red, int green, int blue, int height, int depth, int lightSky, int lightBlock, int generationMode, boolean flag)
-	{
-		long dataPoint = 0;
-		dataPoint += (long) (alpha >>> ALPHA_DOWNSIZE_SHIFT) << ALPHA_SHIFT;
-		dataPoint += (red & RED_MASK) << RED_SHIFT;
-		dataPoint += (green & GREEN_MASK) << GREEN_SHIFT;
-		dataPoint += (blue & BLUE_MASK) << BLUE_SHIFT;
-		dataPoint += (height & HEIGHT_MASK) << HEIGHT_SHIFT;
-		dataPoint += (depth & DEPTH_MASK) << DEPTH_SHIFT;
-		dataPoint += (lightBlock & BLOCK_LIGHT_MASK) << BLOCK_LIGHT_SHIFT;
-		dataPoint += (lightSky & SKY_LIGHT_MASK) << SKY_LIGHT_SHIFT;
-		dataPoint += (generationMode & GEN_TYPE_MASK) << GEN_TYPE_SHIFT;
-		if (flag)
-			dataPoint += FLAG_MASK << FLAG_SHIFT;
-		dataPoint += EXISTENCE_MASK << EXISTENCE_SHIFT;
-		
-		return dataPoint;
-	}
-	
-	public static short getHeight(long dataPoint)
-	{
-		return (short) ((dataPoint >>> HEIGHT_SHIFT) & HEIGHT_MASK);
-	}
-	
-	public static short getDepth(long dataPoint)
-	{
-		return (short) ((dataPoint >>> DEPTH_SHIFT) & DEPTH_MASK);
-	}
-	
-	public static short getAlpha(long dataPoint)
-	{
-		return (short) ((((dataPoint >>> ALPHA_SHIFT) & ALPHA_MASK) << ALPHA_DOWNSIZE_SHIFT) | 0b1111);
-	}
-	
-	public static short getRed(long dataPoint)
-	{
-		return (short) ((dataPoint >>> RED_SHIFT) & RED_MASK);
-	}
-	
-	public static short getGreen(long dataPoint)
-	{
-		return (short) ((dataPoint >>> GREEN_SHIFT) & GREEN_MASK);
-	}
-	
-	public static short getBlue(long dataPoint)
-	{
-		return (short) ((dataPoint >>> BLUE_SHIFT) & BLUE_MASK);
-	}
-	
-	public static byte getLightSky(long dataPoint)
-	{
-		return (byte) ((dataPoint >>> SKY_LIGHT_SHIFT) & SKY_LIGHT_MASK);
-	}
-	
-	public static byte getLightSkyAlt(long dataPoint)
-	{
-		if (skyLightPlayer == 0 && ((dataPoint >>> FLAG_SHIFT) & FLAG_MASK) == 1)
-			return 0;
-		else
-			return (byte) ((dataPoint >>> SKY_LIGHT_SHIFT) & SKY_LIGHT_MASK);
-	}
-	
-	public static byte getLightBlock(long dataPoint)
-	{
-		return (byte) ((dataPoint >>> BLOCK_LIGHT_SHIFT) & BLOCK_LIGHT_MASK);
-	}
-	
-	public static boolean getFlag(long dataPoint)
-	{
-		return ((dataPoint >>> FLAG_SHIFT) & FLAG_MASK) == 1;
-	}
-	
-	public static byte getGenerationMode(long dataPoint)
-	{
-		return (byte) ((dataPoint >>> GEN_TYPE_SHIFT) & GEN_TYPE_MASK);
-	}
-	
-	
-	public static boolean isVoid(long dataPoint)
-	{
-		return (((dataPoint >>> VOID_SHIFT) & VOID_MASK) == 1);
-	}
-	
-	public static boolean doesItExist(long dataPoint)
-	{
-		return (((dataPoint >>> EXISTENCE_SHIFT) & EXISTENCE_MASK) == 1);
-	}
-	
-	public static int getColor(long dataPoint)
-	{
-		return (int) (((dataPoint >>> COLOR_SHIFT) & COLOR_MASK) | (/*((dataPoint >>> (ALPHA_SHIFT - ALPHA_DOWNSIZE_SHIFT)) | 0b1111)*/255 << 24));
-	}
-	
-	/** This is used to convert a dataPoint to string (useful for the print function) */
-	@SuppressWarnings("unused")
-	public static String toString(long dataPoint)
-	{
-		return getHeight(dataPoint) + " " +
-					   getDepth(dataPoint) + " " +
-					   getAlpha(dataPoint) + " " +
-					   getRed(dataPoint) + " " +
-					   getBlue(dataPoint) + " " +
-					   getGreen(dataPoint) + " " +
-					   getLightBlock(dataPoint) + " " +
-					   getLightSky(dataPoint) + " " +
-					   getGenerationMode(dataPoint) + " " +
-					   isVoid(dataPoint) + " " +
-					   doesItExist(dataPoint) + '\n';
-	}
-	
-	public static void shrinkArray(short[] array, int packetSize, int start, int length, int arraySize)
-	{
-		start *= packetSize;
-		length *= packetSize;
-		arraySize *= packetSize;
-		for (int i = 0; i < arraySize - start; i++)
-		{
-			array[start + i] = array[start + length + i];
-			//remove comment to not leave garbage at the end
-			//array[start + packetSize + i] = 0;
-		}
-	}
-	
-	public static void extendArray(short[] array, int packetSize, int start, int length, int arraySize)
-	{
-		start *= packetSize;
-		length *= packetSize;
-		arraySize *= packetSize;
-		for (int i = arraySize - start - 1; i >= 0; i--)
-		{
-			array[start + length + i] = array[start + i];
-			array[start + i] = 0;
-		}
-	}
-	
-	/**
-	 * This method merge column of multiple data together
-	 * @param dataToMerge one or more columns of data
-	 * @param inputVerticalData vertical size of an input data
-	 * @param maxVerticalData max vertical size of the merged data
-	 * @return one column of correctly parsed data
-	 */
-	public static long[] mergeMultiData(long[] dataToMerge, int inputVerticalData, int maxVerticalData)
-	{
-		int size = dataToMerge.length / inputVerticalData;
-		
-		// We initialize the arrays that are going to be used
-		short[] heightAndDepth = ThreadMapUtil.getHeightAndDepth((WORLD_HEIGHT / 2 + 1) * 2);
-		long[] dataPoint = ThreadMapUtil.getVerticalDataArray(DetailDistanceUtil.getMaxVerticalData(0));
-		
-		
-		int genMode = DistanceGenerationMode.FULL.complexity;
-		boolean allEmpty = true;
-		boolean allVoid = true;
-		boolean allDefault;
-		long singleData;
-		
-		
-		short depth;
-		short height;
-		int count = 0;
-		int i;
-		int ii;
-		int dataIndex;
-		//We collect the indexes of the data, ordered by the depth
-		for (int index = 0; index < size; index++)
-		{
-			for (dataIndex = 0; dataIndex < inputVerticalData; dataIndex++)
-			{
-				singleData = dataToMerge[index * inputVerticalData + dataIndex];
-				if (doesItExist(singleData))
-				{
-					genMode = Math.min(genMode, getGenerationMode(singleData));
-					allEmpty = false;
-					if (!isVoid(singleData))
-					{
-						allVoid = false;
-						depth = getDepth(singleData);
-						height = getHeight(singleData);
-						
-						int botPos = -1;
-						int topPos = -1;
-						//values fall in between and possibly require extension of array
-						boolean botExtend = false;
-						boolean topExtend = false;
-						for (i = 0; i < count; i++)
-						{
-							if (depth <= heightAndDepth[i * 2] && depth >= heightAndDepth[i * 2 + 1])
-							{
-								botPos = i;
-								break;
-							}
-							else if (depth < heightAndDepth[i * 2 + 1] && ((i + 1 < count && depth > heightAndDepth[(i + 1) * 2]) || i + 1 == count))
-							{
-								botPos = i;
-								botExtend = true;
-								break;
-							}
-						}
-						for (i = 0; i < count; i++)
-						{
-							if (height <= heightAndDepth[i * 2] && height >= heightAndDepth[i * 2 + 1])
-							{
-								topPos = i;
-								break;
-							}
-							else if (height < heightAndDepth[i * 2 + 1] && ((i + 1 < count && height > heightAndDepth[(i + 1) * 2]) || i + 1 == count))
-							{
-								topPos = i;
-								topExtend = true;
-								break;
-							}
-						}
-						if (topPos == -1)
-						{
-							if (botPos == -1)
-							{
-								//whole block falls above
-								extendArray(heightAndDepth, 2, 0, 1, count);
-								heightAndDepth[0] = height;
-								heightAndDepth[1] = depth;
-								count++;
-							}
-							else if (!botExtend)
-							{
-								//only top falls above extending it there, while bottom is inside existing
-								shrinkArray(heightAndDepth, 2, 0, botPos, count);
-								heightAndDepth[0] = height;
-								count -= botPos;
-							}
-							else
-							{
-								//top falls between some blocks, extending those as well
-								shrinkArray(heightAndDepth, 2, 0, botPos, count);
-								heightAndDepth[0] = height;
-								heightAndDepth[1] = depth;
-								count -= botPos;
-							}
-						}
-						else if (!topExtend)
-						{
-							if (!botExtend)
-								//both top and bottom are within some exiting blocks, possibly merging them
-								heightAndDepth[topPos * 2 + 1] = heightAndDepth[botPos * 2 + 1];
-							else
-								//top falls between some blocks, extending it there
-								heightAndDepth[topPos * 2 + 1] = depth;
-							shrinkArray(heightAndDepth, 2, topPos + 1, botPos - topPos, count);
-							count -= botPos - topPos;
-						}
-						else
-						{
-							if (!botExtend)
-							{
-								//only top is within some exiting block, extending it
-								topPos++; //to make it easier
-								heightAndDepth[topPos * 2] = height;
-								heightAndDepth[topPos * 2 + 1] = heightAndDepth[botPos * 2 + 1];
-								shrinkArray(heightAndDepth, 2, topPos + 1, botPos - topPos, count);
-								count -= botPos - topPos;
-							}
-							else
-							{
-								//both top and bottom are outside existing blocks
-								shrinkArray(heightAndDepth, 2, topPos + 1, botPos - topPos, count);
-								count -= botPos - topPos;
-								extendArray(heightAndDepth, 2, topPos + 1, 1, count);
-								count++;
-								heightAndDepth[topPos * 2 + 2] = height;
-								heightAndDepth[topPos * 2 + 3] = depth;
-							}
-						}
-					}
-				}
-				else
-					break;
-			}
-		}
-		
-		//We check if there is any data that's not empty or void
-		if (allEmpty)
-			return dataPoint;
-		if (allVoid)
-		{
-			dataPoint[0] = createVoidDataPoint(genMode);
-			return dataPoint;
-		}
-		
-		//we limit the vertical portion to maxVerticalData
-		int j = 0;
-		while (count > maxVerticalData)
-		{
-			ii = WORLD_HEIGHT - VERTICAL_OFFSET;
-			for (i = 0; i < count - 1; i++)
-			{
-				if (heightAndDepth[i * 2 + 1] - heightAndDepth[(i + 1) * 2] <= ii)
-				{
-					ii = heightAndDepth[i * 2 + 1] - heightAndDepth[(i + 1) * 2];
-					j = i;
-				}
-			}
-			heightAndDepth[j * 2 + 1] = heightAndDepth[(j + 1) * 2 + 1];
-			for (i = j + 1; i < count - 1; i++)
-			{
-				heightAndDepth[i * 2] = heightAndDepth[(i + 1) * 2];
-				heightAndDepth[i * 2 + 1] = heightAndDepth[(i + 1) * 2 + 1];
-			}
-			//System.arraycopy(heightAndDepth, j + 1, heightAndDepth, j, count - j - 1);
-			count--;
-		}
-		//As standard the vertical lods are ordered from top to bottom
-		for (j = count - 1; j >= 0; j--)
-		{
-			height = heightAndDepth[j * 2];
-			depth = heightAndDepth[j * 2 + 1];
-			
-			if ((depth == 0 && height == 0) || j >= heightAndDepth.length / 2)
-				break;
-			
-			int numberOfChildren = 0;
-			int tempAlpha = 0;
-			int tempRed = 0;
-			int tempGreen = 0;
-			int tempBlue = 0;
-			int tempLightBlock = 0;
-			int tempLightSky = 0;
-			byte tempGenMode = DistanceGenerationMode.FULL.complexity;
-			allEmpty = true;
-			allVoid = true;
-			allDefault = true;
-			long data = 0;
-			
-			for (int index = 0; index < size; index++)
-			{
-				for (dataIndex = 0; dataIndex < inputVerticalData; dataIndex++)
-				{
-					singleData = dataToMerge[index * inputVerticalData + dataIndex];
-					if (doesItExist(singleData) && !isVoid(singleData))
-					{
-						
-						if ((depth <= getDepth(singleData) && getDepth(singleData) <= height)
-									|| (depth <= getHeight(singleData) && getHeight(singleData) <= height))
-						{
-							if (getHeight(singleData) > getHeight(data))
-								data = singleData;
-						}
-					}
-					else
-						break;
-				}
-				if (!doesItExist(data))
-				{
-					singleData = dataToMerge[index * inputVerticalData];
-					data = createVoidDataPoint(getGenerationMode(singleData));
-				}
-				
-				if (doesItExist(data))
-				{
-					allEmpty = false;
-					if (!isVoid(data))
-					{
-						numberOfChildren++;
-						allVoid = false;
-						tempAlpha += getAlpha(data);
-						tempRed += getRed(data);
-						tempGreen += getGreen(data);
-						tempBlue += getBlue(data);
-						tempLightBlock += getLightBlock(data);
-						tempLightSky += getLightSky(data);
-						if (!getFlag(data))
-							allDefault = false;
-					}
-					tempGenMode = (byte) Math.min(tempGenMode, getGenerationMode(data));
-				}
-				else
-					tempGenMode = (byte) Math.min(tempGenMode, DistanceGenerationMode.NONE.complexity);
-			}
-			
-			if (allEmpty)
-				//no child has been initialized
-				dataPoint[j] = EMPTY_DATA;
-			else if (allVoid)
-				//all the children are void
-				dataPoint[j] = createVoidDataPoint(tempGenMode);
-			else
-			{
-				//we have at least 1 child
-				tempAlpha = tempAlpha / numberOfChildren;
-				tempRed = tempRed / numberOfChildren;
-				tempGreen = tempGreen / numberOfChildren;
-				tempBlue = tempBlue / numberOfChildren;
-				tempLightBlock = tempLightBlock / numberOfChildren;
-				tempLightSky = tempLightSky / numberOfChildren;
-				dataPoint[j] = createDataPoint(tempAlpha, tempRed, tempGreen, tempBlue, height, depth, tempLightSky, tempLightBlock, tempGenMode, allDefault);
-			}
-		}
-		return dataPoint;
-	}
-}

src/main/java/com/seibel/lod/core/dataFormat/ColorFormat.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.dataFormat;
 
 public class ColorFormat

src/main/java/com/seibel/lod/core/dataFormat/DataMergeUtil.java

@@ -1,5 +1,25 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.dataFormat;
 
+@Deprecated //Unused
 public class DataMergeUtil
 {
 	public static void shrinkArray(short[] array, int packetSize, int start, int length, int arraySize)

src/main/java/com/seibel/lod/core/dataFormat/LightFormat.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.dataFormat;
 
 public class LightFormat

src/main/java/com/seibel/lod/core/dataFormat/PositionDataFormat.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.dataFormat;
 
 public class PositionDataFormat

src/main/java/com/seibel/lod/core/dataFormat/VerticalDataFormat.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.dataFormat;
 
 public class VerticalDataFormat

src/main/java/com/seibel/lod/core/enums/LodDirection.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.enums;
 
 import java.util.Arrays;
@@ -9,11 +28,18 @@ import java.util.stream.Collectors;
 import com.seibel.lod.core.objects.math.Vec3i;
 
 /**
- * A (almost) exact copy of Minecraft's
+ * An (almost) exact copy of Minecraft's
  * Direction enum.
- * 
+ *
+ * Up <Br>
+ * Down <Br>
+ * North <Br>
+ * South <Br>
+ * East <Br>
+ * West <Br>
+ *
  * @author James Seibel
- * @version 11-13-2021
+ * @version 2021-11-13
  */
 public enum LodDirection
 {
@@ -23,7 +49,27 @@ public enum LodDirection
 	SOUTH(3, 2, 0, "south", LodDirection.AxisDirection.POSITIVE, LodDirection.Axis.Z, new Vec3i(0, 0, 1)),
 	WEST(4, 5, 1, "west", LodDirection.AxisDirection.NEGATIVE, LodDirection.Axis.X, new Vec3i(-1, 0, 0)),
 	EAST(5, 4, 3, "east", LodDirection.AxisDirection.POSITIVE, LodDirection.Axis.X, new Vec3i(1, 0, 0));
-
+	public static final LodDirection[] DIRECTIONS = new LodDirection[] {
+			LodDirection.UP,
+			LodDirection.DOWN,
+			LodDirection.WEST,
+			LodDirection.EAST,
+			LodDirection.NORTH,
+			LodDirection.SOUTH };
+	
+	public static final LodDirection[] OPPOSITE_DIRECTIONS = new LodDirection[] {
+			LodDirection.UP,
+			LodDirection.DOWN,
+			LodDirection.SOUTH,
+			LodDirection.NORTH,
+			LodDirection.EAST,
+			LodDirection.WEST };
+	/** North, South, East, West */
+	public static final LodDirection[] ADJ_DIRECTIONS = new LodDirection[] {
+			LodDirection.EAST,
+			LodDirection.WEST,
+			LodDirection.SOUTH,
+			LodDirection.NORTH };
 //	private final int data3d;
 //	private final int oppositeIndex;
 //	private final int data2d;

src/main/java/com/seibel/lod/core/enums/WorldType.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/config/BlocksToAvoid.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/config/BufferRebuildTimes.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -31,6 +31,8 @@ package com.seibel.lod.core.enums.config;
  */
 public enum BufferRebuildTimes
 {
+	CONSTANT(0, 0, 0, 1),
+	
 	FREQUENT(1000, 500, 2500, 1),
 	
 	NORMAL(2000, 1000, 5000, 4),

src/main/java/com/seibel/lod/core/enums/config/DistanceGenerationMode.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,8 +19,6 @@
 
 package com.seibel.lod.core.enums.config;
 
-import org.jetbrains.annotations.Nullable;
-
 /**
  * NONE <br>
  * BIOME_ONLY <br>
@@ -38,9 +36,9 @@ import org.jetbrains.annotations.Nullable;
 public enum DistanceGenerationMode
 {
 	/**
-	 * Don't generate anything
+	 * Don't generate anything except just load in already existing chunks
 	 */
-	NONE((byte) 0),
+	NONE((byte) 1),
 	
 	/**
 	 * Only generate the biomes and use biome
@@ -49,7 +47,7 @@ public enum DistanceGenerationMode
 	 * Doesn't generate height, everything is shown at sea level.
 	 * Multithreaded - Fastest (2-5 ms)
 	 */
-	BIOME_ONLY((byte) 1),
+	BIOME_ONLY((byte) 2),
 	
 	/**
 	 * Same as BIOME_ONLY, except instead
@@ -57,7 +55,7 @@ public enum DistanceGenerationMode
 	 * different biome types (mountain, ocean, forest, etc.)
 	 * use predetermined heights to simulate having height data.
 	 */
-	BIOME_ONLY_SIMULATE_HEIGHT((byte) 2),
+	BIOME_ONLY_SIMULATE_HEIGHT((byte) 3),
 	
 	/**
 	 * Generate the world surface,
@@ -65,7 +63,7 @@ public enum DistanceGenerationMode
 	 * or structures.
 	 * Multithreaded - Faster (10-20 ms)
 	 */
-	SURFACE((byte) 3),
+	SURFACE((byte) 4),
 	
 	/**
 	 * Generate everything except structures.
@@ -73,7 +71,7 @@ public enum DistanceGenerationMode
 	 * since some features cause concurrentModification exceptions.
 	 * Multithreaded - Fast (15-20 ms)
 	 */
-	FEATURES((byte) 4),
+	FEATURES((byte) 5),
 	
 	/**
 	 * Ask the server to generate/load each chunk.
@@ -82,8 +80,9 @@ public enum DistanceGenerationMode
 	 * are adding the mod on a pre-existing world.
 	 * Singlethreaded - Slow (15-50 ms, with spikes up to 200 ms)
 	 */
-	FULL((byte) 5);
+	FULL((byte) 6);
 	
+	public static DistanceGenerationMode RENDERABLE = DistanceGenerationMode.BIOME_ONLY;
 	
 	/**
 	 * The higher the number the more complete the generation is.
@@ -96,7 +95,6 @@ public enum DistanceGenerationMode
 	}
 	
 	// Note: return null if out of range
-	@Nullable
 	public static DistanceGenerationMode previous(DistanceGenerationMode mode) {
 		switch (mode) {
 		case FULL:
@@ -110,18 +108,14 @@ public enum DistanceGenerationMode
 		case BIOME_ONLY:
 			return DistanceGenerationMode.NONE;
 		case NONE:
-			return null;
 		default:
 			return null;
 		}
 	}
 	
 	// Note: return null if out of range
-	@Nullable
 	public static DistanceGenerationMode next(DistanceGenerationMode mode) {
 		switch (mode) {
-		case FULL:
-			return null;
 		case FEATURES:
 			return DistanceGenerationMode.FULL;
 		case SURFACE:
@@ -132,6 +126,7 @@ public enum DistanceGenerationMode
 			return DistanceGenerationMode.BIOME_ONLY_SIMULATE_HEIGHT;
 		case NONE:
 			return DistanceGenerationMode.BIOME_ONLY;
+		case FULL:
 		default:
 			return null;
 		}

src/main/java/com/seibel/lod/core/enums/config/DropoffQuality.java

@@ -0,0 +1,49 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2022  Tom Lee (TomTheFurry)
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.enums.config;
+
+/**
+ * AUTO <br>
+ * SMOOTH_DROPOFF <br>
+ * PERFORMANCE_FOCUSED <br>
+ * <br>
+ * Determines how lod level drop off should be done
+ * 
+ * @author Tom Lee
+ * @version 7-1-2022
+ */
+public enum DropoffQuality {
+
+	/** SMOOTH_DROPOFF when <128 lod view distance, or PERFORMANCE_FOCUSED otherwise */
+	AUTO(-1),
+	
+	SMOOTH_DROPOFF(10),
+	
+	PERFORMANCE_FOCUSED(0);
+	
+	public final int fastModeSwitch;
+	
+	DropoffQuality(int fastModeSwitch) {
+		this.fastModeSwitch = fastModeSwitch;
+	}
+	
+	
+}

src/main/java/com/seibel/lod/core/enums/config/GenerationPriority.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -32,10 +32,12 @@ package com.seibel.lod.core.enums.config;
  */
 public enum GenerationPriority
 {
-	/** NEAR_FIRST when connected to servers and FAR_FIRST when on single player */
+	/** NEAR_FIRST when connected to servers and BALANCED when on single player */
 	AUTO,
 	
 	NEAR_FIRST,
 	
+	BALANCED,
+	
 	FAR_FIRST
 }

src/main/java/com/seibel/lod/core/enums/config/GpuUploadMethod.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -20,7 +20,7 @@
 package com.seibel.lod.core.enums.config;
 
 /**
- * Auto, Buffer_Storage, Sub_Data, Buffer_Mapping, Data
+ * Auto, BUFFER_STORAGE_MAPPING, Buffer_Storage, Sub_Data, Buffer_Mapping, Data
  * 
  * @author James Seibel
  * @version 12-1-2021
@@ -28,19 +28,23 @@ package com.seibel.lod.core.enums.config;
 public enum GpuUploadMethod
 {
 	/** Picks the best option based on the GPU the user has. */
-	AUTO,
+	AUTO(false, false),
+
+	/*
+	 */
+	BUFFER_STORAGE_MAPPING(true, true),
 	
 	/**
 	 * Default for NVIDIA if OpenGL 4.5 is supported. <br>
 	 * Fast rendering, no stuttering.
 	 */
-	BUFFER_STORAGE,
+	BUFFER_STORAGE(false, true),
 	
 	/**
 	 * Backup option for NVIDIA. <br>
 	 * Fast rendering but may stutter when uploading.
 	 */
-	SUB_DATA,
+	SUB_DATA(false, false),
 
 	/** 
 	 * Default option for AMD/Intel. <br>
@@ -48,12 +52,19 @@ public enum GpuUploadMethod
 	 * Fast rending if in GPU memory, slow if in system memory, <br>
 	 * but won't stutter when uploading. 
 	 */
-	BUFFER_MAPPING,
+	BUFFER_MAPPING(true, false),
 
 	/** 
 	 * Backup option for AMD/Intel. <br>
 	 * Fast rendering but may stutter when uploading. 
 	 */
-	DATA,
+	DATA(false, false);
+	
+	public final boolean useEarlyMapping;
+	public final boolean useBufferStorage;
+	GpuUploadMethod(boolean useEarlyMapping, boolean useBufferStorage) {
+		this.useEarlyMapping = useEarlyMapping;
+		this.useBufferStorage = useBufferStorage;
+	}
 	
 }

src/main/java/com/seibel/lod/core/enums/config/HorizontalQuality.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/config/HorizontalResolution.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/config/HorizontalScale.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/config/LightGenerationMode.java

@@ -0,0 +1,30 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.enums.config;
+
+public enum LightGenerationMode
+{
+	
+	// Fake in light values based on height maps
+	FAST,
+	
+	// Run the light engine though the chunk to generate proper light values
+	FANCY
+}

src/main/java/com/seibel/lod/core/enums/config/LoggerMode.java

@@ -0,0 +1,44 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.enums.config;
+import org.apache.logging.log4j.Level;
+
+public enum LoggerMode {
+    DISABLED(Level.OFF, Level.OFF),
+    LOG_ALL_TO_FILE(Level.ALL, Level.OFF),
+    LOG_ERROR_TO_CHAT(Level.ALL, Level.ERROR),
+    LOG_WARNING_TO_CHAT(Level.ALL, Level.WARN),
+    LOG_INFO_TO_CHAT(Level.ALL, Level.INFO),
+    LOG_DEBUG_TO_CHAT(Level.ALL, Level.DEBUG),
+    LOG_ALL_TO_CHAT(Level.ALL, Level.ALL),
+    LOG_ERROR_TO_CHAT_AND_FILE(Level.ERROR, Level.ERROR),
+    LOG_WARNING_TO_CHAT_AND_FILE(Level.WARN, Level.WARN),
+    LOG_INFO_TO_CHAT_AND_FILE(Level.INFO, Level.INFO),
+    LOG_DEBUG_TO_CHAT_AND_FILE(Level.DEBUG, Level.DEBUG),
+    LOG_WARNING_TO_CHAT_AND_INFO_TO_FILE(Level.INFO, Level.WARN),
+    LOG_ERROR_TO_CHAT_AND_INFO_TO_FILE(Level.INFO, Level.ERROR),
+    ;
+    public final Level levelForFile;
+    public final Level levelForChat;
+    LoggerMode(Level levelForFile, Level levelForChat) {
+        this.levelForFile = levelForFile;
+        this.levelForChat = levelForChat;
+    }
+}

src/main/java/com/seibel/lod/core/enums/config/ServerFolderNameMode.java

@@ -0,0 +1,69 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2022  Tom Lee (TomTheFurry)
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.enums.config;
+
+/**
+ * AUTO <br>
+ * NAME_ONLY <br>
+ * NAME_IP <br>
+ * NAME_IP_PORT <br>
+ * <br>
+ * Determines how the multiplayer folders should be named.
+ * 
+ * @author James Seibel
+ * @version 3-7-2022
+ */
+public enum ServerFolderNameMode
+{
+	/**
+	 * NAME_IP for LAN connections <Br>
+	 * NAME_IP_PORT for all others
+	 */
+	AUTO,
+	
+	/** Only use the server name */
+	NAME_ONLY,
+	
+	/** 
+	 * {SERVER_NAME} IP {IP} <br>
+	 * Minecraft Server IP 192.168.1.40 
+	 */
+	NAME_IP,
+	
+	/** 
+	 * {SERVER_NAME} IP {IP} <br>
+	 * Minecraft Server IP 192.168.1.40:25565
+	 */
+	NAME_IP_PORT,
+	
+	/** 
+	 * {SERVER_NAME} IP {IP} <br>
+	 * Minecraft Server IP 192.168.1.40:25565 GameVersion 1.16.5 <Br> <br>
+	 * 
+	 * Not normally recommended, since the game version can change if the
+	 * server installs paper or some other jar. <br>
+	 * This is just here to provide backwards compatibility.
+	 * 
+	 * TODO add this to config desc
+	 */
+	NAME_IP_PORT_MC_VERSION;
+	
+}

src/main/java/com/seibel/lod/core/enums/config/ShadingMode.java

@@ -1,3 +1,22 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.enums.config;
 
 /**

src/main/java/com/seibel/lod/core/enums/config/VanillaOverdraw.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -31,15 +31,12 @@ package com.seibel.lod.core.enums.config;
  */
 public enum VanillaOverdraw
 {
-	/** Never draw LODs where a minecraft chunk could be. */
+	/** Dont draw LODs where a minecraft chunk could be. Use Overdraw Offset to tweak the border thickness */
 	NEVER,
 	
-	/** Draw LODs over the farther minecraft chunks. */
+	/** Draw LODs over the farther minecraft chunks. Dynamically decides the border thickness */
 	DYNAMIC,
 	
 	/** Draw LODs over all minecraft chunks. */
 	ALWAYS,
-	
-	/** Draw LODs over border chunks. */
-	BORDER,
 }

src/main/java/com/seibel/lod/core/enums/config/VerticalQuality.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,94 +19,101 @@
 
 package com.seibel.lod.core.enums.config;
 
-import org.jetbrains.annotations.Nullable;
-
 /**
  * heightmap <br>
  * multi_lod <br>
- * 
+ *
  * @author Leonardo Amato
- * @version 10-07-2021
+ * @version 2022-3-26
  */
 public enum VerticalQuality
 {
 	LOW(
-			new int[] { 2,
-					2,
-					2,
-					2,
-					1,
-					1,
-					1,
-					1,
-					1,
-					1,
-					1 }
+			new int[] { 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1 },
+			2
 	),
 	
 	MEDIUM(
-			new int[] { 4,
-					4,
-					2,
-					2,
-					2,
-					1,
-					1,
-					1,
-					1,
-					1,
-					1 }
+			new int[] { 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1 },
+			4
 	),
 	
 	HIGH(
-			new int[] {
-					8,
-					8,
-					4,
-					4,
-					2,
-					2,
-					2,
-					1,
-					1,
-					1,
-					1 }
+			new int[] { 8, 6, 4, 2, 2, 2, 2, 1, 1, 1, 1 },
+			6
+	),
+	
+	ULTRA(
+			new int[] { 16, 8, 4, 2, 2, 2, 2, 1, 1, 1, 1 },
+			12
 	);
 	
 	public final int[] maxVerticalData;
 	
-	VerticalQuality(int[] maxVerticalData)
+	@Deprecated // Will find other ways to optimize
+	public final int maxConnectedLods;
+	
+	VerticalQuality(int[] maxVerticalData, int maxConnectedLods)
 	{
 		this.maxVerticalData = maxVerticalData;
+		this.maxConnectedLods = maxConnectedLods;
 	}
 	
-	// Note: return null if out of range
-	@Nullable
-	public static VerticalQuality previous(VerticalQuality mode) {
-		switch (mode) {
+	/** returns null if out of range */
+	public static VerticalQuality previous(VerticalQuality mode)
+	{
+		switch (mode)
+		{
+		case ULTRA:
+			return VerticalQuality.HIGH;
 		case HIGH:
 			return VerticalQuality.MEDIUM;
 		case MEDIUM:
 			return VerticalQuality.LOW;
 		case LOW:
-			return null;
 		default:
 			return null;
 		}
 	}
-
-	// Note: return null if out of range
-	@Nullable
-	public static VerticalQuality next(VerticalQuality mode) {
-		switch (mode) {
-		case HIGH:
-			return null;
+	
+	/** returns null if out of range */
+	public static VerticalQuality next(VerticalQuality mode)
+	{
+		switch (mode)
+		{
 		case MEDIUM:
 			return VerticalQuality.HIGH;
 		case LOW:
 			return VerticalQuality.MEDIUM;
+		case HIGH:
+			return VerticalQuality.ULTRA;
+		case ULTRA:
 		default:
 			return null;
 		}
 	}
+	
+	/**
+	 * Returns the value with the given name, case-insensitive. <br>
+	 * Returns null if no enums match the name. <br>
+	 * Similar to valueOf(String value)
+	 */
+	public static VerticalQuality getByName(String name)
+	{
+		switch (name.toUpperCase())
+		{
+		case "ULTRA":
+			return VerticalQuality.ULTRA;
+		case "HIGH":
+			return VerticalQuality.HIGH;
+		case "MEDIUM":
+			return VerticalQuality.MEDIUM;
+		case "LOW":
+			return VerticalQuality.LOW;
+			
+		default:
+			return null;
+		}
+	}
+	
 }

src/main/java/com/seibel/lod/core/enums/rendering/DebugMode.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -29,21 +29,41 @@ public enum DebugMode
 {
 	/** LODs are rendered normally */
 	OFF,
+
+	/** LOD draws in wireframe. */
+	SHOW_WIREFRAME,
 	
 	/** LOD colors are based on their detail */
 	SHOW_DETAIL,
 	
 	/** LOD colors are based on their detail, and draws in wireframe. */
-	SHOW_DETAIL_WIREFRAME;
+	SHOW_DETAIL_WIREFRAME,
+	
+	/** LOD colors are based on their gen mode. */
+	SHOW_GENMODE,
+	
+	/** LOD colors are based on their gen mode, and draws in wireframe. */
+	SHOW_GENMODE_WIREFRAME,
+
+	/** Only draw overlapping LOD quads. */
+	SHOW_OVERLAPPING_QUADS,
+
+	/** Only draw overlapping LOD quads, and draws in wireframe. */
+	SHOW_OVERLAPPING_QUADS_WIREFRAME;
 	
 	/** used when cycling through the different modes */
 	private DebugMode next;
 	
 	static
 	{
-		OFF.next = SHOW_DETAIL;
+		OFF.next = SHOW_WIREFRAME;
+		SHOW_WIREFRAME.next = SHOW_DETAIL;
 		SHOW_DETAIL.next = SHOW_DETAIL_WIREFRAME;
-		SHOW_DETAIL_WIREFRAME.next = OFF;
+		SHOW_DETAIL_WIREFRAME.next = SHOW_GENMODE;
+		SHOW_GENMODE.next = SHOW_GENMODE_WIREFRAME;
+		SHOW_GENMODE_WIREFRAME.next = SHOW_OVERLAPPING_QUADS;
+		SHOW_OVERLAPPING_QUADS.next = SHOW_OVERLAPPING_QUADS_WIREFRAME;
+		SHOW_OVERLAPPING_QUADS_WIREFRAME.next = OFF;
 	}
 	
 	/** returns the next debug mode */

src/main/java/com/seibel/lod/core/enums/rendering/FogColorMode.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/rendering/FogDistance.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/rendering/FogDrawMode.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/rendering/FogSetting.java

@@ -0,0 +1,78 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.enums.rendering;
+
+import java.util.Objects;
+
+/**
+ * Contains all configurable options related to fog.
+ *
+ * @version 2022-4-13
+ */
+public class FogSetting
+{
+    /** a FogSetting object with 0 for every value */
+    public static final FogSetting EMPTY = new FogSetting(0, 0, 0, 0,0, FogSetting.FogType.LINEAR);
+    
+    
+	public final double start;
+	public final double end;
+	public final double min;
+	public final double max;
+	public final double density;
+	public final FogType fogType;
+	
+	public FogSetting(double start, double end, double min, double max, double density, FogType fogType)
+	{
+		this.start = start;
+		this.end = end;
+		this.min = min;
+		this.max = max;
+		this.density = density;
+		this.fogType = fogType;
+	}
+	
+	@Override
+	public boolean equals(Object o)
+	{
+		if (this == o)
+			return true;
+		if (o == null || getClass() != o.getClass())
+			return false;
+		FogSetting that = (FogSetting) o;
+		return Double.compare(that.start, start) == 0 && Double.compare(that.end, end) == 0 && Double.compare(that.min, min) == 0 && Double.compare(that.max, max) == 0 && Double.compare(that.density, density) == 0 && fogType == that.fogType;
+	}
+	
+	@Override
+	public int hashCode()
+	{
+		return Objects.hash(start, end, min, max, density, fogType);
+	}
+	
+	public enum FogType
+	{
+		LINEAR,
+		EXPONENTIAL,
+		EXPONENTIAL_SQUARED,
+		// TEXTURE_BASED, // TODO: Impl this
+	}
+	
+	
+}

src/main/java/com/seibel/lod/core/enums/rendering/GLProxyContext.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/enums/rendering/HeightFogMixMode.java

@@ -0,0 +1,49 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.enums.rendering;
+
+/**
+ * basic                        <br>
+ * Ignore_Height                <br>
+ * Addition                     <br>
+ * Max                          <br>
+ * Multiply                     <br>
+ * Inverse_Multiply             <br>
+ * Limited_Addition             <br>
+ * Multiply_Addition            <br>
+ * Inverse_Multiply_Addition    <br>
+ * Average                      <br>
+ *
+ * @author Leetom
+ * @version 2022-4-14
+ */
+public enum HeightFogMixMode
+{
+    BASIC,
+    IGNORE_HEIGHT,
+    ADDITION,
+    MAX,
+    MULTIPLY,
+    INVERSE_MULTIPLY,
+    LIMITED_ADDITION,
+    MULTIPLY_ADDITION,
+    INVERSE_MULTIPLY_ADDITION,
+    AVERAGE,
+}

src/main/java/com/seibel/lod/core/enums/rendering/HeightFogMode.java

@@ -0,0 +1,41 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.enums.rendering;
+
+public enum HeightFogMode
+{
+	ABOVE_CAMERA(true, true, false),
+	BELOW_CAMERA(true, false, true),
+	ABOVE_AND_BELOW_CAMERA(true, true, true),
+	ABOVE_SET_HEIGHT(false, true, false),
+	BELOW_SET_HEIGHT(false, false, true),
+	ABOVE_AND_BELOW_SET_HEIGHT(false, true, true);
+	
+	public final boolean basedOnCamera;
+	public final boolean above;
+	public final boolean below;
+	
+	HeightFogMode(boolean basedOnCamera, boolean above, boolean below)
+	{
+		this.basedOnCamera = basedOnCamera;
+		this.above = above;
+		this.below = below;
+	}
+}

src/main/java/com/seibel/lod/core/enums/rendering/RendererType.java

@@ -0,0 +1,43 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.enums.rendering;
+
+public enum RendererType {
+    DEFAULT,
+    DEBUG,
+    DISABLED,
+    ;
+
+    public static RendererType next(RendererType type) {
+        switch (type) {
+            case DEFAULT: return DEBUG;
+            case DEBUG: return DISABLED;
+            default: return DEFAULT;
+        }
+    }
+
+    public static RendererType previous(RendererType type) {
+        switch (type) {
+            case DEFAULT: return DISABLED;
+            case DEBUG: return DEFAULT;
+            default: return DEBUG;
+        }
+    }
+}

src/main/java/com/seibel/lod/core/handlers/ChunkFileLoader.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/handlers/IReflectionHandler.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -20,6 +20,7 @@
 package com.seibel.lod.core.handlers;
 
 import com.seibel.lod.core.enums.rendering.FogDrawMode;
+import com.seibel.lod.core.handlers.dependencyInjection.IBindable;
 
 /**
  * A singleton used to get variables from methods
@@ -34,9 +35,9 @@ import com.seibel.lod.core.enums.rendering.FogDrawMode;
  * different MC versions.
  * 
  * @author James Seibel
- * @version 12-14-2021
+ * @version 3-5-2022
  */
-public interface IReflectionHandler
+public interface IReflectionHandler extends IBindable
 {
 	/** @returns Whether Optifine is set to render fog or not. */
 	FogDrawMode getFogDrawMode();
@@ -46,4 +47,6 @@ public interface IReflectionHandler
 	
 	/** @returns if Sodium (or a sodium like) mod is present. Attempts to find the "SodiumWorldRenderer" class. */
 	boolean sodiumPresent();
+
+	boolean optifinePresent();
 }

src/main/java/com/seibel/lod/core/handlers/LodDimensionFileHandler.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -21,26 +21,38 @@ package com.seibel.lod.core.handlers;
 
 import java.io.*;
 import java.nio.file.Files;
-import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
-import java.util.Arrays;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.ConcurrentModificationException;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.locks.ReentrantLock;
 
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.logging.ConfigBasedLogger;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+import com.seibel.lod.core.api.ClientApi;
 import org.apache.commons.compress.compressors.xz.XZCompressorInputStream;
 import org.apache.commons.compress.compressors.xz.XZCompressorOutputStream;
-import org.jetbrains.annotations.Nullable;
 
-import com.seibel.lod.core.api.ClientApi;
 import com.seibel.lod.core.enums.config.DistanceGenerationMode;
 import com.seibel.lod.core.enums.config.VerticalQuality;
+import com.seibel.lod.core.objects.lod.LevelContainer;
 import com.seibel.lod.core.objects.lod.LodDimension;
 import com.seibel.lod.core.objects.lod.LodRegion;
 import com.seibel.lod.core.objects.lod.RegionPos;
 import com.seibel.lod.core.objects.lod.VerticalLevelContainer;
 import com.seibel.lod.core.util.LodThreadFactory;
 import com.seibel.lod.core.util.LodUtil;
-import com.seibel.lod.core.util.ThreadMapUtil;
+import com.seibel.lod.core.logging.SpamReducedLogger;
+import com.seibel.lod.core.util.UnitBytes;
+import org.apache.logging.log4j.LogManager;
+
 
 /**
  * This object handles creating LodRegions
@@ -49,22 +61,31 @@ import com.seibel.lod.core.util.ThreadMapUtil;
  * 
  * @author James Seibel
  * @author Cola
- * @version 9-25-2021
+ * @version 2022-3-30
  */
 public class LodDimensionFileHandler
 {
-	/** This is the dimension that owns this file handler */
-	private LodDimension lodDimension;
+	private static final ILodConfigWrapperSingleton config = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	public static final ConfigBasedLogger LOGGER = new ConfigBasedLogger(LogManager.getLogger(LodDimensionFileHandler.class),
+			() -> config.client().advanced().debugging().debugSwitch().getLogFileReadWriteEvent());
 	
-	private final File dimensionDataSaveFolder;
+	public static final boolean ENABLE_SAVE_THREAD_LOGGING = true;
+	public static final boolean ENABLE_SAVE_REGION_LOGGING = false;
+	
+	/** This is the dimension that owns this file handler */
+	private final LodDimension lodDimension;
+	
+	public final File dimensionDataSaveFolder;
 	
 	/** lod */
 	private static final String FILE_NAME_PREFIX = "lod";
-	/** .txt */
+	/** .xz */
 	private static final String FILE_EXTENSION = ".xz";
 	/** detail- */
 	private static final String DETAIL_FOLDER_NAME_PREFIX = "detail-";
 	
+	public static final String MULTIPLAYER_FOLDER_NAME = "Distant_Horizons_server_data";
+	
 	/**
 	 * .tmp <br>
 	 * Added to the end of the file path when saving to prevent
@@ -74,20 +95,29 @@ public class LodDimensionFileHandler
 	 */
 	private static final String TMP_FILE_EXTENSION = ".tmp";
 	
+	/**
+	 * This is compression level set in XZ
+	 * lower values are faster
+	 * difference in size should be only 2x
+	 */
+	private static final int COMPRESSION_LEVEL = 1;
+	
 	/**
 	 * This is the file version currently accepted by this
 	 * file handler, older versions (smaller numbers) will be deleted and overwritten,
 	 * newer versions (larger numbers) will be ignored and won't be read.
 	 */
-	public static final int LOD_SAVE_FILE_VERSION = 8;
+	public static final int LOD_SAVE_FILE_VERSION = 9;
 	
 	/**
 	 * Allow saving asynchronously, but never try to save multiple regions
 	 * at a time
 	 */
-	private final ExecutorService fileWritingThreadPool = Executors.newSingleThreadExecutor(new LodThreadFactory(this.getClass().getSimpleName()));
-	
+	private final AtomicBoolean isFileWritingThreadRunning = new AtomicBoolean(false);
+	private ExecutorService fileWritingThreadPool = Executors.newSingleThreadExecutor(
+			new LodThreadFactory(this.getClass().getSimpleName(), Thread.NORM_PRIORITY + 1));
 	
+	private final ConcurrentHashMap<RegionPos, LodRegion> regionToSave = new ConcurrentHashMap<RegionPos, LodRegion>();
 	
 	
 	public LodDimensionFileHandler(File newSaveFolder, LodDimension newLodDimension)
@@ -97,9 +127,67 @@ public class LodDimensionFileHandler
 		
 		dimensionDataSaveFolder = newSaveFolder;
 		lodDimension = newLodDimension;
+		
+		checkForOldSaveStructure();
 	}
 	
+	private ReentrantLock mergeOldFileLock = new ReentrantLock();
 	
+	private void checkForOldSaveStructure()
+	{
+		File file = new File(getFileBasePath());
+		if (!file.exists())
+			return;
+		
+		File[] vertQualFiles = file.listFiles();
+		for (File vertQualFile : vertQualFiles)
+		{
+			if (!vertQualFile.isDirectory())
+				continue;
+			
+			if (vertQualFile.getName().equals(VerticalQuality.HIGH.toString()) ||
+					vertQualFile.getName().equals(VerticalQuality.MEDIUM.toString()) ||
+					vertQualFile.getName().equals(VerticalQuality.LOW.toString()))
+			{
+				File[] subFiles = vertQualFile.listFiles();
+				for (File subFile : subFiles)
+				{
+					if (!subFile.isDirectory())
+						continue;
+					
+					if (subFile.getName().equals(DistanceGenerationMode.FULL.toString()) ||
+							subFile.getName().equals(DistanceGenerationMode.FEATURES.toString()) ||
+							subFile.getName().equals(DistanceGenerationMode.SURFACE.toString()) ||
+							subFile.getName().equals(DistanceGenerationMode.BIOME_ONLY_SIMULATE_HEIGHT.toString()) ||
+							subFile.getName().equals(DistanceGenerationMode.BIOME_ONLY.toString()) ||
+							subFile.getName().equals(DistanceGenerationMode.NONE.toString()))
+					{
+						LOGGER.info("Noticed old save structure files. Starting merge process...");
+						LodDimensionOldFileStructureHandler oldFileStructHandler = new LodDimensionOldFileStructureHandler(this);
+						if (mergeOldFileLock.tryLock())
+						{
+							// I got the lock to merge file.
+							LOGGER.info("Updating VerticalQuality LOW...");
+							oldFileStructHandler.mergeOldFileStructureForVertQuality(VerticalQuality.LOW);
+							LOGGER.info("Updating VerticalQuality MEDIUM...");
+							oldFileStructHandler.mergeOldFileStructureForVertQuality(VerticalQuality.MEDIUM);
+							LOGGER.info("Updating VerticalQuality HIGH...");
+							oldFileStructHandler.mergeOldFileStructureForVertQuality(VerticalQuality.HIGH);
+							LOGGER.info("Update completed.");
+						}
+						else
+						{
+							// Someone is already doing it. I just need to wait until they are done.
+							mergeOldFileLock.lock();
+							mergeOldFileLock.unlock();
+						}
+						LOGGER.info("Merge process completed.");
+						return;
+					}
+				}
+			}
+		}
+	}
 	
 	
 	
@@ -108,24 +196,53 @@ public class LodDimensionFileHandler
 	//================//
 	
 	/**
-	 * Returns the LodRegion at the given coordinates.
+	 * Returns a new LodRegion at the given coordinates.
 	 * Returns an empty region if the file doesn't exist.
 	 */
-	public LodRegion loadRegionFromFile(byte detailLevel, RegionPos regionPos, DistanceGenerationMode generationMode, VerticalQuality verticalQuality)
+	public LodRegion loadRegionFromFile(byte detailLevel, RegionPos regionPos, VerticalQuality verticalQuality)
 	{
-		int regionX = regionPos.x;
-		int regionZ = regionPos.z;
-		LodRegion region = new LodRegion(LodUtil.REGION_DETAIL_LEVEL, regionPos, generationMode, verticalQuality);
-		
-		for (byte tempDetailLevel = LodUtil.REGION_DETAIL_LEVEL; tempDetailLevel >= detailLevel; tempDetailLevel--)
+		// Get one from the region hot cache
+		LodRegion region = regionToSave.get(regionPos);
+		if (region != null && region.getMinDetailLevel() <= detailLevel &&
+				region.getVerticalQuality().compareTo(verticalQuality) >= 0)
+			return region; // The current hot cache to-be-saved region match our requirement.
+		region = new LodRegion((byte) (LodUtil.REGION_DETAIL_LEVEL + 1), regionPos, verticalQuality);
+		return loadRegionFromFile(detailLevel, region, verticalQuality);
+	}
+	
+	/**
+	 * Returns the LodRegion that is filled at the given coordinates.
+	 * Returns an empty region if the file doesn't exist.
+	 */
+	public LodRegion loadRegionFromFile(byte detailLevel, LodRegion region, VerticalQuality verticalQuality)
+	{
+		if (region.getVerticalQuality().compareTo(verticalQuality) < 0)
 		{
-			File file = getBestMatchingRegionFile(tempDetailLevel, regionX, regionZ, generationMode, verticalQuality);
-			if (file == null) continue; // Failed to find the file for this detail level. continue and try next one
+			regionToSave.put(region.getRegionPos(), region); //FIXME: The hashMap key should prob be a {regionPos,VertQual} pair. 
+			region = new LodRegion((byte) (LodUtil.REGION_DETAIL_LEVEL + 1), region.getRegionPos(), verticalQuality);
+		}
+		int regionX = region.regionPosX;
+		int regionZ = region.regionPosZ;
+		
+		for (byte tempDetailLevel = (byte) (region.getMinDetailLevel() - 1); tempDetailLevel >= detailLevel; tempDetailLevel--)
+		{
+			
+			File file = getBestMatchingRegionFile(tempDetailLevel, regionX, regionZ, verticalQuality);
+			if (file == null)
+			{
+				region.addLevelContainer(new VerticalLevelContainer(tempDetailLevel));
+				continue; // Failed to find the file for this detail level. continue and try next one
+			}
 			
 			long fileSize = file.length();
-			if (fileSize == 0) continue; // file is empty. Let's not try parsing empty files
-			try (XZCompressorInputStream inputStream = new XZCompressorInputStream(new FileInputStream(file)))
+			if (fileSize == 0)
 			{
+				region.addLevelContainer(new VerticalLevelContainer(tempDetailLevel));
+				continue; // file is empty. Let's not try parsing empty files
+			}
+			try (FileInputStream fileInStream = new FileInputStream(file))
+			{
+				XZCompressorInputStream inputStream = new XZCompressorInputStream(fileInStream);
 				int fileVersion;
 				fileVersion = inputStream.read();
 				
@@ -136,12 +253,12 @@ public class LodDimensionFileHandler
 					// close the reader and delete the file.
 					inputStream.close();
 					file.delete();
-					ClientApi.LOGGER.info("Outdated LOD region file for region: (" + regionX + "," + regionZ + ")"
+					LOGGER.info("Outdated LOD region file for region: (" + regionX + "," + regionZ + ")[" + tempDetailLevel + "]"
 							+ " version found: " + fileVersion
 							+ ", version requested: " + LOD_SAVE_FILE_VERSION
 							+ ". File has been deleted.");
 					// This should not break, but be continue to see whether other detail levels can be loaded or updated
-					continue;
+					region.addLevelContainer(new VerticalLevelContainer(tempDetailLevel));
 				}
 				else if (fileVersion > LOD_SAVE_FILE_VERSION)
 				{
@@ -149,40 +266,43 @@ public class LodDimensionFileHandler
 					// close the reader and ignore the file, we don't
 					// want to accidentally delete anything the user may want.
 					inputStream.close();
-					ClientApi.LOGGER.info("Newer LOD region file for region: (" + regionX + "," + regionZ + ")"
+					LOGGER.info("Newer LOD region file for region: (" + regionX + "," + regionZ + ")[" + tempDetailLevel + "]"
 							+ " version found: " + fileVersion
 							+ ", version requested: " + LOD_SAVE_FILE_VERSION
 							+ " this region will not be written to in order to protect the newer file.");
 					// This should not break, but be continue to see whether other detail levels can be loaded or updated
-					continue;
+					region.addLevelContainer(new VerticalLevelContainer(tempDetailLevel));
 				}
 				else if (fileVersion < LOD_SAVE_FILE_VERSION)
 				{
-					ClientApi.LOGGER.debug("Old LOD region file for region: (" + regionX + "," + regionZ + ")"
+					LOGGER.info("Old LOD region file for region: (" + regionX + "," + regionZ + ")[" + tempDetailLevel + "]"
 							+ " version found: " + fileVersion
 							+ ", version requested: " + LOD_SAVE_FILE_VERSION
 							+ ". File will be loaded and updated to new format in next save.");
 					// this is old, but readable version
 					// read and add the data to our region
-					region.addLevelContainer(new VerticalLevelContainer(new DataInputStream(inputStream), fileVersion));
+					DataInputStream dataStream = new DataInputStream(inputStream);
+					region.addLevelContainer(new VerticalLevelContainer(dataStream, fileVersion, tempDetailLevel));
+					dataStream.close();
 					inputStream.close();
-				} else
+				}
+				else
 				{
+					LOGGER.debug("Loading LOD region file for region: (" + regionX + "," + regionZ + ")[" + tempDetailLevel + "]");
 					// this file is a readable version,
 					// read and add the data to our region
-					region.addLevelContainer(new VerticalLevelContainer(new DataInputStream(inputStream), LOD_SAVE_FILE_VERSION));
+					DataInputStream dataStream = new DataInputStream(inputStream);
+					region.addLevelContainer(new VerticalLevelContainer(dataStream, LOD_SAVE_FILE_VERSION, tempDetailLevel));
+					dataStream.close();
 					inputStream.close();
 				}
 			}
 			catch (IOException ioEx)
 			{
-				ClientApi.LOGGER.error("LOD file read error. Unable to read xz compressed file [" + file + "] error [" + ioEx.getMessage() + "]: ");
-				ioEx.printStackTrace();
+				LOGGER.error("LOD file read error. Unable to read xz compressed file [" + file + "]: ", ioEx);
+				region.addLevelContainer(new VerticalLevelContainer(tempDetailLevel));
 			}
-		}// for each detail level
-		
-		if (region.getMinDetailLevel() >= detailLevel)
-			region.growTree(detailLevel);
+		} // for each detail level
 		
 		return region;
 	}
@@ -192,33 +312,226 @@ public class LodDimensionFileHandler
 	// Save to File //
 	//==============//
 	
-	/** Save all dirty regions in this LodDimension to file */
-	public void saveDirtyRegionsToFileAsync()
-	{
-		fileWritingThreadPool.execute(saveDirtyRegionsThread);
-	}
-	
-	private final Thread saveDirtyRegionsThread = new Thread(() ->
+	public void saveDirect(int posX, int posZ, VerticalQuality vertQual, VerticalLevelContainer dataContainer)
 	{
+		File file = new File(getFileBasePath() + vertQual + File.separatorChar +
+				DETAIL_FOLDER_NAME_PREFIX + dataContainer.detailLevel + File.separatorChar +
+				FILE_NAME_PREFIX + "." + posX + "." + posZ + FILE_EXTENSION);
+		if (file.exists())
+		{
+			LOGGER.warn("LOD file write warn. Unable to write [" + file + "] because the newer version file already exist! Skipping this position...");
+			return;
+		}
+		if (!file.getParentFile().exists())
+			file.getParentFile().mkdirs();
 		try
 		{
-			for (int i = 0; i < lodDimension.getWidth(); i++)
+			file.createNewFile();
+		}
+		catch (IOException e)
+		{
+			LOGGER.error("LOD file write error. Unable to create parent directory for [" + file + "]: ", e);
+			return;
+		}
+		try (FileOutputStream fileOutStream = new FileOutputStream(file))
+		{
+			XZCompressorOutputStream outputStream = new XZCompressorOutputStream(fileOutStream, COMPRESSION_LEVEL);
+			// add the version of this file
+			outputStream.write(LOD_SAVE_FILE_VERSION);
+			// add each LodChunk to the file
+			DataOutputStream dataStream = new DataOutputStream(outputStream);
+			dataContainer.writeData(dataStream);
+			dataStream.close();
+			outputStream.close();
+		}
+		catch (IOException e)
+		{
+			LOGGER.error("LOD file write error. Unable to write to temp file [" + file + "]: ", e);
+		}
+	}
+	
+	
+	public void addRegionsToSave(LodRegion r)
+	{
+		regionToSave.put(r.getRegionPos(), r);
+	}
+	
+	private final SpamReducedLogger ramLogger = new SpamReducedLogger(1);
+	
+	public void dumpBufferMemoryUsage()
+	{
+		if (!ramLogger.canMaybeLog())
+			return;
+		ArrayList<LodRegion> regions = new ArrayList<LodRegion>(regionToSave.values());
+		ramLogger.info("Dumping Ram Usage for file writer for {} with {} regions...",
+				lodDimension.dimension.getDimensionName(), regions.size());
+		int nonNullRegionCount = 0;
+		int nonDirtiedRegionCount = 0;
+		int writingRegionCount = 0;
+		long totalUsage = 0;
+		int[] detailCount = new int[LodUtil.DETAIL_OPTIONS];
+		long[] detailUsage = new long[LodUtil.DETAIL_OPTIONS];
+		for (LodRegion r : regions)
+		{
+			if (r == null)
+				continue;
+			nonNullRegionCount++;
+			if (!r.needSaving)
+				nonDirtiedRegionCount++;
+			if (r.isWriting.get() != 0)
+				writingRegionCount++;
+			LevelContainer[] container = r.debugGetDataContainers().clone();
+			if (container == null || container.length != LodUtil.DETAIL_OPTIONS)
 			{
-				for (int j = 0; j < lodDimension.getWidth(); j++)
+				LOGGER.error("DumpRamUsage encountered an invalid region!");
+				continue;
+			}
+			for (int i = 0; i < LodUtil.DETAIL_OPTIONS; i++)
+			{
+				if (container[i] == null)
+					continue;
+				detailCount[i]++;
+				long byteUsage = container[i].getRoughRamUsage();
+				detailUsage[i] += byteUsage;
+				totalUsage += byteUsage;
+			}
+		}
+		ramLogger.info("================================================");
+		ramLogger.info("Non Null Regions: [{}], Non-Dirtied Regions: [{}], Writing Regions: [{}], Bytes: [{}]",
+				nonNullRegionCount, nonDirtiedRegionCount, writingRegionCount, new UnitBytes(totalUsage));
+		ramLogger.info("------------------------------------------------");
+		for (int i = 0; i < LodUtil.DETAIL_OPTIONS; i++)
+		{
+			ramLogger.info("DETAIL {}: Containers: [{}], Bytes: [{}]", i, detailCount[i], new UnitBytes(detailUsage[i]));
+		}
+		ramLogger.info("================================================");
+		ramLogger.incLogTries();
+	}
+	
+	/** Save all dirty regions in this LodDimension to file */
+	public void saveDirtyRegionsToFile(boolean blockUntilFinished)
+	{
+		// determine the regions to save
+		for (int i = 0; i < lodDimension.getWidth(); i++)
+		{
+			for (int j = 0; j < lodDimension.getWidth(); j++)
+			{
+				LodRegion r = lodDimension.getRegionByArrayIndex(i, j);
+				
+				// FIXME: Note that the isWriting is a crude attempt at syncing. It won't work.
+				// It just reduces the chance of a race condition
+				if (r != null && r.needSaving)
 				{
-					if (lodDimension.GetIsRegionDirty(i, j) && lodDimension.getRegionByArrayIndex(i, j) != null)
-					{
-						saveRegionToFile(lodDimension.getRegionByArrayIndex(i, j));
-						lodDimension.SetIsRegionDirty(i, j, false);
-					}
+					regionToSave.put(r.getRegionPos(), r);
 				}
 			}
 		}
-		catch (Exception e)
+		
+		// save the dimension data
+		ClientApi.DIMENSION_FINDER.saveDimensionPlayerData(this.dimensionDataSaveFolder);
+		trySaveRegionsToBeSaved();
+		
+		// wait for the saving to finish if requested
+		if (blockUntilFinished)
 		{
-			e.printStackTrace();
+			if (ENABLE_SAVE_THREAD_LOGGING)
+				LOGGER.info("Blocking until lod file save finishes!");
+			
+			try
+			{
+				fileWritingThreadPool.shutdown();
+				boolean worked = fileWritingThreadPool.awaitTermination(30, TimeUnit.SECONDS);
+				if (!worked)
+					LOGGER.error("File writing timed out! File data may not be saved correctly and may cause corruptions!!!");
+			}
+			catch (InterruptedException e)
+			{
+				LOGGER.error("File writing wait is interrupted! File data may not be saved correctly and may cause corruptions!!!: ", e);
+			}
+			finally
+			{
+				fileWritingThreadPool = Executors.newSingleThreadExecutor(new LodThreadFactory(this.getClass().getSimpleName(), Thread.NORM_PRIORITY + 1));
+			}
 		}
-	});
+	}
+	
+	public void trySaveRegionsToBeSaved()
+	{
+		if (regionToSave.isEmpty())
+			return;
+		// Use Memory order Acquire to acquire any memory changes on getting this boolean
+		// (Corresponding call is the this::writerMain(...)::...setRelease(false);)
+		//boolean haventStarted = !isFileWritingThreadRunning.compareAndExchangeAcquire(false, true);
+		// The above needs java 9!
+		boolean haventStarted = isFileWritingThreadRunning.compareAndSet(false, true);
+		
+		if (haventStarted)
+		{
+			// We acquired the atomic lock.
+			fileWritingThreadPool.execute(this::writerMain);
+		}
+	}
+	
+	private void writerMain()
+	{
+		// Use Memory order Relaxed as no additional memory changes needed to be visible.
+		// (This is just a safety checks)
+		// boolean isStarted = isFileWritingThreadRunning.getPlain();
+		// The above needs java 9!
+		boolean isStarted = isFileWritingThreadRunning.get();
+		
+		if (!isStarted)
+			throw new ConcurrentModificationException("WriterMain Triggered but the thead state is not started!?");
+		
+		if (ENABLE_SAVE_THREAD_LOGGING)
+			LOGGER.info("Lod File Writer started. To-be-written-regions: " + regionToSave.size());
+		
+		Instant start = Instant.now();
+		// Note: Since regionToSave is a ConcurrentHashMap, and the .values() return one that support concurrency,
+		//       this for loop should be safe and loop until all values are gone.
+		while (!regionToSave.isEmpty())
+		{
+			for (LodRegion r : regionToSave.values())
+			{
+				
+				try
+				{
+					if (r.isWriting.getAndIncrement() > 0)
+						continue;
+					//Check if the data has been swapped out right under me. Otherwise remove it from the entry
+					if (!regionToSave.remove(r.getRegionPos(), r))
+						continue;
+					r.needSaving = false;
+					Instant i = Instant.now();
+					if (ENABLE_SAVE_REGION_LOGGING)
+						LOGGER.info("Lod: Saving Region " + r.getRegionPos());
+					saveRegionToFile(r);
+					Instant j = Instant.now();
+					Duration d = Duration.between(i, j);
+					if (ENABLE_SAVE_REGION_LOGGING)
+						LOGGER.info("Lod: Region " + r.getRegionPos() + " save finish. Took " + d);
+				}
+				catch (Exception e)
+				{
+					LOGGER.error("Lod: UNCAUGHT exception when saving region " + r.getRegionPos() + ": ", e);
+				}
+				finally
+				{
+					r.isWriting.decrementAndGet();
+				}
+			}
+		}
+		Instant end = Instant.now();
+		
+		if (ENABLE_SAVE_THREAD_LOGGING)
+			LOGGER.info("Lod File Writer completed. Took " + Duration.between(start, end));
+		
+		// Use Memory order Release to release any memory changes on setting this boolean
+		// (Corresponding call is the this::saveRegions(...)::...compareAndExchangeAcquire(false, true);)
+		// isFileWritingThreadRunning.setRelease(false);
+		// The above needs java 9!
+		isFileWritingThreadRunning.set(false);
+	}
 	
 	/**
 	 * Save a specific region to disk.<br>
@@ -233,8 +546,9 @@ public class LodDimensionFileHandler
 		for (byte detailLevel = region.getMinDetailLevel(); detailLevel <= LodUtil.REGION_DETAIL_LEVEL; detailLevel++)
 		{
 			// Get the old file
-			File oldFile = getRegionFile(region.regionPosX, region.regionPosZ, region.getGenerationMode(), detailLevel, region.getVerticalQuality());
-			ClientApi.LOGGER.debug("saving region [" + region.regionPosX + ", " + region.regionPosZ + "] to file.");
+			File oldFile = getRegionFile(region.regionPosX, region.regionPosZ, detailLevel, region.getVerticalQuality());
+			if (ENABLE_SAVE_REGION_LOGGING)
+				LOGGER.debug("saving region [" + region.regionPosX + ", " + region.regionPosZ + "] detail " + detailLevel + " to file.");
 			
 			boolean isFileFullyGened = false;
 			// make sure the file and folder exists
@@ -244,10 +558,14 @@ public class LodDimensionFileHandler
 				// create it and the folder if need be
 				if (!oldFile.getParentFile().exists())
 					oldFile.getParentFile().mkdirs();
-				try {
+				
+				try
+				{
 					oldFile.createNewFile();
-				} catch (IOException e) {
-					ClientApi.LOGGER.error("LOD file write error. Unable to create parent directory for [" + oldFile + "] error [" + e.getMessage() + "]: ");
+				}
+				catch (IOException e)
+				{
+					LOGGER.error("LOD file write error. Unable to create parent directory for [" + oldFile + "] error [" + e.getMessage() + "]: ");
 					e.printStackTrace();
 					continue;
 				}
@@ -259,8 +577,9 @@ public class LodDimensionFileHandler
 				// (to make sure we don't overwrite a newer
 				// version file if it exists)
 				int fileVersion = LOD_SAVE_FILE_VERSION;
-				try (XZCompressorInputStream inputStream = new XZCompressorInputStream(new FileInputStream(oldFile)))
+				try (FileInputStream fileInStream = new FileInputStream(oldFile))
 				{
+					XZCompressorInputStream inputStream = new XZCompressorInputStream(fileInStream);
 					fileVersion = inputStream.read();
 					inputStream.skip(1);
 					isFileFullyGened = (inputStream.read() & 0b10000000) != 0;
@@ -268,7 +587,7 @@ public class LodDimensionFileHandler
 				}
 				catch (IOException e)
 				{
-					ClientApi.LOGGER.warn("LOD file write warning. Unable to read existing file [" + oldFile + "] version. Treating it as latest version. [" + e.getMessage() + "]: ");
+					LOGGER.warn("LOD file write warning. Unable to read existing file [" + oldFile + "] version. Treating it as latest version. [" + e.getMessage() + "]: ");
 					e.printStackTrace();
 				}
 				
@@ -285,21 +604,16 @@ public class LodDimensionFileHandler
 			}
 			
 			// Now create a new temporary save file
-			File tempFile;
-			try {
-				tempFile = File.createTempFile(oldFile.getName(), TMP_FILE_EXTENSION);
-			} catch (IOException e) {
-				ClientApi.LOGGER.error("LOD file write error. Unable to create temp file for [" + oldFile + "] error [" + e.getMessage() + "]: ");
-				e.printStackTrace();
-				continue;
-			}
-			tempFile.deleteOnExit(); // Mark it to be deleted on exit if any unexcepted terminations happen
-			try (XZCompressorOutputStream outputStream = new XZCompressorOutputStream(new FileOutputStream(tempFile), 3))
+			File tempFile = new File(oldFile.getPath() + TMP_FILE_EXTENSION);
+			try (FileOutputStream fileOutStream = new FileOutputStream(tempFile))
 			{
+				XZCompressorOutputStream outputStream = new XZCompressorOutputStream(fileOutStream, 3);
 				// add the version of this file
 				outputStream.write(LOD_SAVE_FILE_VERSION);
 				// add each LodChunk to the file
-				boolean isNewDataFullyGened = region.getLevel(detailLevel).writeData(new DataOutputStream(outputStream));
+				DataOutputStream dataStream = new DataOutputStream(outputStream);
+				boolean isNewDataFullyGened = region.getLevel(detailLevel).writeData(dataStream);
+				dataStream.close();
 				outputStream.close();
 				
 				if (!isNewDataFullyGened && isFileFullyGened)
@@ -307,10 +621,13 @@ public class LodDimensionFileHandler
 					// existing file is complete while new one is only partially generate
 					// this can happen is for some reason loading failed
 					// this doesn't fix the bug, but at least protects old data
-					ClientApi.LOGGER.error("LOD file write error. Attempted to overwrite complete region with incomplete one [" + oldFile + "]");
-					try {
+					LOGGER.error("LOD file write error. Attempted to overwrite complete region with incomplete one [" + oldFile + "]");
+					try
+					{
 						tempFile.delete();
-					} catch (SecurityException e) {
+					}
+					catch (SecurityException e)
+					{
 						// Failed to delete temp file... just continue.
 					}
 					continue;
@@ -318,17 +635,18 @@ public class LodDimensionFileHandler
 			}
 			catch (IOException e)
 			{
-				ClientApi.LOGGER.error("LOD file write error. Unable to write to temp file [" + tempFile + "] error [" + e.getMessage() + "]: ");
-				e.printStackTrace();
+				LOGGER.error("LOD file write error. Unable to write to temp file [" + tempFile + "]: ", e);
 				continue;
 			}
 			
 			// overwrite the old file with the new one
-			try {
+			try
+			{
 				Files.move(tempFile.toPath(), oldFile.toPath(), StandardCopyOption.ATOMIC_MOVE, StandardCopyOption.REPLACE_EXISTING);
-			} catch (IOException e) {
-				ClientApi.LOGGER.error("LOD file write error. Unable to update file [" + oldFile + "] error [" + e.getMessage() + "]: ");
-				e.printStackTrace();
+			}
+			catch (IOException e)
+			{
+				LOGGER.error("LOD file write error. Unable to update file [" + oldFile + "]: ", e);
 			}
 		}
 	}
@@ -337,6 +655,24 @@ public class LodDimensionFileHandler
 	// helper methods //
 	//================//
 	
+	/**
+	 * Returns the save folder used for this dimension.
+	 * 
+	 * @throws RuntimeException if there was an error getting the folder
+	 */
+	private String getFileBasePath() throws RuntimeException
+	{
+		try
+		{
+			return dimensionDataSaveFolder.getCanonicalPath() + File.separatorChar;
+		}
+		catch (IOException e)
+		{
+			LOGGER.warn("Unable to get the base save file path. Error: " + e.getMessage(), e);
+			throw new RuntimeException("DistantHorizons Get Save File Path Failure");
+		}
+	}
+	
 	/**
 	 * Return the name of the file that should contain the
 	 * region at the given x and z. <br>
@@ -346,38 +682,27 @@ public class LodDimensionFileHandler
 	 * <p>
 	 * Returns null if there is an IO or security Exception.
 	 */
-	
-	private String getFileBasePath() {
-		try {
-			return dimensionDataSaveFolder.getCanonicalPath() + File.separatorChar;
-		} catch (IOException e) {
-			ClientApi.LOGGER.warn("Unable to get the base save file path. One possible cause is that"
-					+ " the process failed to read the current path location due to security configs.");
-			throw new RuntimeException("DistantHorizons Get Save File Path Failure");
-		}
-	}
-	
-	private File getRegionFile(int regionX, int regionZ, DistanceGenerationMode genMode, byte detail, VerticalQuality vertQuality) {
+	private File getRegionFile(int regionX, int regionZ, byte detail, VerticalQuality vertQuality)
+	{
 		return new File(getFileBasePath() + vertQuality + File.separatorChar +
-				genMode + File.separatorChar +
 				DETAIL_FOLDER_NAME_PREFIX + detail + File.separatorChar +
 				FILE_NAME_PREFIX + "." + regionX + "." + regionZ + FILE_EXTENSION);
 	}
 	
-	// Return null if no file found
-	@Nullable
-	private File getBestMatchingRegionFile(byte detailLevel, int regionX, int regionZ, DistanceGenerationMode targetGenMode, VerticalQuality targetVertQuality) {
-		DistanceGenerationMode genMode = targetGenMode;
-		// Search from least GenMode to max GenMode, than least vertQuality to max vertQuality
-		do {
-			File file = getRegionFile(regionX, regionZ, genMode, detailLevel, targetVertQuality);
-			if (file.exists()) return file; // Found target file.
-			targetGenMode = DistanceGenerationMode.next(targetGenMode);
-			if (targetGenMode == null) { // Failed to find any files for this vertQuality. Try next one up.
-				targetGenMode = genMode;
-				targetVertQuality = VerticalQuality.next(targetVertQuality);
-			}
-		} while (targetVertQuality != null);
+	/** Returns null if no file is found */
+	private File getBestMatchingRegionFile(byte detailLevel, int regionX, int regionZ, VerticalQuality targetVertQuality)
+	{
+		// Search from least vertQuality to max vertQuality
+		do
+		{
+			File file = getRegionFile(regionX, regionZ, detailLevel, targetVertQuality);
+			if (file.exists())
+				return file; // Found target file.
+			
+			targetVertQuality = VerticalQuality.next(targetVertQuality);
+		}
+		while (targetVertQuality != null);
+		
 		return null;
 	}
 	

src/main/java/com/seibel/lod/core/handlers/LodDimensionFinder.java

@@ -0,0 +1,585 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.handlers;
+
+import com.electronwill.nightconfig.core.file.CommentedFileConfig;
+
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.handlers.dimensionFinder.PlayerData;
+import com.seibel.lod.core.handlers.dimensionFinder.SubDimCompare;
+import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
+import com.seibel.lod.core.builders.lodBuilding.LodBuilderConfig;
+import com.seibel.lod.core.enums.config.DistanceGenerationMode;
+import com.seibel.lod.core.enums.config.VerticalQuality;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.logging.ConfigBasedLogger;
+import com.seibel.lod.core.objects.lod.LodDimension;
+import com.seibel.lod.core.objects.lod.LodRegion;
+import com.seibel.lod.core.objects.lod.RegionPos;
+import com.seibel.lod.core.util.DataPointUtil;
+import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
+import com.seibel.lod.core.wrapperInterfaces.chunk.AbstractChunkPosWrapper;
+import com.seibel.lod.core.wrapperInterfaces.chunk.IChunkWrapper;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+import com.seibel.lod.core.wrapperInterfaces.world.IDimensionTypeWrapper;
+import com.seibel.lod.core.wrapperInterfaces.world.IWorldWrapper;
+import org.apache.logging.log4j.LogManager;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.UUID;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Used to guess the world folder for the player's current dimension.
+ *
+ * @author James Seibel
+ * @version 2022-3-31
+ */
+public class LodDimensionFinder
+{
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	private static final IWrapperFactory FACTORY = SingletonHandler.get(IWrapperFactory.class);
+	public static final ConfigBasedLogger LOGGER = new ConfigBasedLogger(LogManager.getLogger(LodDimensionFinder.class),
+			() -> CONFIG.client().advanced().debugging().debugSwitch().getLogFileSubDimEvent());
+	
+	/** Increasing this will increase accuracy but increase calculation time */
+	private static final VerticalQuality VERTICAL_QUALITY_TO_TEST_WITH = VerticalQuality.LOW;
+	
+	public static final String THREAD_NAME = "Sub-Dimension-Finder";
+	public static final String DEFAULT_SAVE_DIMENSION_FOLDER = "_Default-Sub-Dimension";
+	
+	private PlayerData playerData = new PlayerData(MC);
+	private PlayerData firstSeenPlayerData = null;
+	
+	private volatile LodDimension foundLodDimension = null;
+	
+	/** If true the LodDimensionFileHelper is attempting to determine the folder for this dimension */
+	private AtomicBoolean determiningWorldFolder = new AtomicBoolean(false);
+	
+	
+	
+	public LodDimensionFinder()
+	{
+	
+	}
+	
+	
+	
+	/** Returns true if a LodDimension has been found */
+	public boolean isDone()
+	{
+		return foundLodDimension != null;
+	}
+	
+	/** Returns the found LodDimension */
+	public LodDimension getAndClearFoundLodDimension()
+	{
+		// clear the found dimension
+		LodDimension returnDim = this.foundLodDimension;
+		this.foundLodDimension = null;
+		
+		return returnDim;
+	}
+	
+	
+	
+	public void AttemptToDetermineSubDimensionAsync(IDimensionTypeWrapper dimensionTypeWrapper)
+	{
+		// prevent multiple threads running at the same time
+		if (determiningWorldFolder.getAndSet(true))
+			return;
+
+		// run asynchronously since this could take a while
+		Thread thread = new Thread(() ->
+		{
+			try
+			{
+				// attempt to get the file handler
+				File saveDir;
+				if (CONFIG.client().multiplayer().getMultiDimensionRequiredSimilarity() == 0)
+				{
+					// only allow 1 sub dimension per world
+					saveDir = getDefaultSubDimensionFolder(dimensionTypeWrapper);
+				}
+				else
+				{
+					saveDir = attemptToDetermineSubDimensionFolder();
+				}
+				
+				if (saveDir == null)
+					return;
+				
+				foundLodDimension = new LodDimension(dimensionTypeWrapper, ApiShared.lodBuilder.defaultDimensionWidthInRegions, saveDir);
+			}
+			catch (IOException e)
+			{
+				ApiShared.LOGGER.error("Unable to set the dimension file handler for dimension type [" + dimensionTypeWrapper.getDimensionName() + "]. Error: " + e.getMessage(), e);
+			}
+			finally
+			{
+				// make sure we unlock this method
+				determiningWorldFolder.set(false);
+			}
+		});
+		thread.setName(THREAD_NAME);
+		thread.start();
+	}
+	
+	/**
+	 * Returns the default save folder if it exists
+	 * otherwise the first valid subDimension folder lexicographically.
+	 *
+	 * @throws IOException if the folder doesn't exist or can't be accessed
+	 */
+	public File getDefaultSubDimensionFolder(IDimensionTypeWrapper dimensionTypeWrapper) throws IOException
+	{
+		File subDimFolder = null;
+		LOGGER.info("Attempting to determine default sub-dimension for [" + MC.getCurrentDimension().getDimensionName() + "]");
+		
+		// move any old data folders if they exist
+		File dimensionFolder = GetDimensionFolder(MC.getCurrentDimension(), "");
+		moveOldSaveFoldersIfNecessary(dimensionFolder, MC.getCurrentDimension(), DEFAULT_SAVE_DIMENSION_FOLDER);
+		
+		// check if a sub dimension folder exists
+		if (dimensionFolder.listFiles() != null)
+		{
+			// at least one folder exists
+			LOGGER.info("Potential Sub Dimension folders: [" + dimensionFolder.listFiles(File::isDirectory).length + "]");
+			
+			
+			// search for a valid sub dimension folder
+			File[] potentialSubDimFolders = dimensionFolder.listFiles();
+			Arrays.sort(potentialSubDimFolders); // listFiles isn't necessarily sorted
+			for (File potentialSubDim : potentialSubDimFolders)
+			{
+				if (isValidSubDimensionDirectory(potentialSubDim))
+				{
+					if (potentialSubDim.getName().equals(DEFAULT_SAVE_DIMENSION_FOLDER))
+					{
+						// use the default save folder if possible
+						subDimFolder = potentialSubDim;
+						break;
+					}
+					else if (subDimFolder == null)
+					{
+						// only get the first non-default sub folder
+						subDimFolder = potentialSubDim;
+					}
+				}
+			}
+		}
+		
+		// if no valid sub dimension was found, create a new one
+		if (subDimFolder == null)
+		{
+			subDimFolder = GetDimensionFolder(dimensionTypeWrapper, DEFAULT_SAVE_DIMENSION_FOLDER);
+			LOGGER.info("Default Sub Dimension not found. Creating: [" +  DEFAULT_SAVE_DIMENSION_FOLDER + "]");
+		}
+		else
+		{
+			LOGGER.info("Default Sub Dimension set to: [" +  LodUtil.shortenString(subDimFolder.getName(), 8) + "...]");
+		}
+		
+		return subDimFolder;
+	}
+	
+	
+	/**
+	 * Currently this method checks a single chunk (where the player is)
+	 * and compares it against the same chunk position in the other dimension worlds to
+	 * guess which world the player is in.
+	 *
+	 * @throws IOException if the folder doesn't exist or can't be accessed
+	 */
+	public File attemptToDetermineSubDimensionFolder() throws IOException
+	{
+		if (firstSeenPlayerData == null)
+		{
+			firstSeenPlayerData = playerData;
+			playerData = new PlayerData(MC);
+		}
+		
+		// relevant positions
+		AbstractChunkPosWrapper playerChunkPos = FACTORY.createChunkPos(playerData.playerBlockPos);
+		int startingBlockPosX = playerChunkPos.getMinBlockX();
+		int startingBlockPosZ = playerChunkPos.getMinBlockZ();
+		RegionPos playerRegionPos = new RegionPos(playerChunkPos);
+		
+		
+		// chunk from the newly loaded dimension
+		IChunkWrapper newlyLoadedChunk = MC.getWrappedClientWorld().tryGetChunk(playerChunkPos);
+		// check if this chunk is valid to test
+		if (!CanDetermineDimensionFolder(newlyLoadedChunk))
+			return null;
+		
+		// create a temporary dimension to store the test LOD
+		LodDimension newlyLoadedDim = new LodDimension(MC.getCurrentDimension(), 1, null, false);
+		newlyLoadedDim.move(playerRegionPos);
+		newlyLoadedDim.regions.set(playerRegionPos.x, playerRegionPos.z, new LodRegion(LodUtil.BLOCK_DETAIL_LEVEL, playerRegionPos, VERTICAL_QUALITY_TO_TEST_WITH));
+		
+		// generate a LOD to test against
+		boolean lodGenerated = ApiShared.lodBuilder.generateLodNodeFromChunk(newlyLoadedDim, newlyLoadedChunk, new LodBuilderConfig(DistanceGenerationMode.FULL), true, true);
+		if (!lodGenerated)
+			return null;
+		
+		
+		// log the start of this attempt
+		LOGGER.info("Attempting to determine sub-dimension for [" + MC.getCurrentDimension().getDimensionName() + "]");
+		LOGGER.info("Player block pos in dimension: [" + playerData.playerBlockPos.getX() + "," + playerData.playerBlockPos.getY() + "," + playerData.playerBlockPos.getZ() + "]");
+		
+		
+		// new chunk data
+		long[][][] newChunkData = new long[LodUtil.CHUNK_WIDTH][LodUtil.CHUNK_WIDTH][];
+		for (int x = 0; x < LodUtil.CHUNK_WIDTH; x++)
+		{
+			for (int z = 0; z < LodUtil.CHUNK_WIDTH; z++)
+			{
+				long[] array = newlyLoadedDim.getRegion(playerRegionPos.x, playerRegionPos.z).getAllData(LodUtil.BLOCK_DETAIL_LEVEL, x + startingBlockPosX, z + startingBlockPosZ);
+				newChunkData[x][z] = array;
+			}
+		}
+		boolean newChunkHasData = !isDataEmpty(newChunkData);
+		
+		// check if the chunk is actually empty
+		if (!newChunkHasData)
+		{
+			if (newlyLoadedChunk.getHeight() != 0)
+			{
+				// the chunk isn't empty but the LOD is...
+				
+				String message = "Error: the chunk at (" + playerChunkPos.getX() + "," + playerChunkPos.getZ() + ") has a height of [" + newlyLoadedChunk.getHeight() + "] but the LOD generated is empty!";
+				LOGGER.error(message);
+			}
+			else
+			{
+				String message = "Warning: The chunk at (" + playerChunkPos.getX() + "," + playerChunkPos.getZ() + ") is empty.";
+				LOGGER.warn(message);
+			}
+			return null;
+		}
+		
+		
+		
+		
+		// get every folder (world) we have for this dimension
+		File dimensionFolder = GetDimensionFolder(newlyLoadedDim.dimension, "");
+		// check if the folder exists
+		if (dimensionFolder.listFiles() == null)
+		{
+			if (!dimensionFolder.exists())
+			{
+				// create the directory since it doesn't exist
+				dimensionFolder.mkdirs();
+			}
+		}
+		
+		
+		// move any old data folders if they exist
+		moveOldSaveFoldersIfNecessary(dimensionFolder, MC.getCurrentDimension(), UUID.randomUUID().toString());
+		
+		
+		
+		
+		
+		// compare each world with the newly loaded one
+		SubDimCompare mostSimilarSubDim = null;
+
+		LOGGER.info("Potential Sub Dimension folders: [" + dimensionFolder.listFiles(File::isDirectory).length + "]");
+		for (File testDimFolder : dimensionFolder.listFiles())
+		{
+			if (!testDimFolder.isDirectory())
+				continue;
+			
+			LOGGER.info("Testing sub dimension: [" + LodUtil.shortenString(testDimFolder.getName(), 8) + "]");
+			
+			try
+			{
+				// get a LOD from this dimension folder
+				LodDimension tempLodDim = new LodDimension(null, 1, null, false);
+				tempLodDim.move(playerRegionPos);
+				LodDimensionFileHandler tempFileHandler = new LodDimensionFileHandler(testDimFolder, tempLodDim);
+				LodRegion testRegion = tempFileHandler.loadRegionFromFile(LodUtil.BLOCK_DETAIL_LEVEL, playerRegionPos, VERTICAL_QUALITY_TO_TEST_WITH);
+				// get data from this LOD
+				long[][][] testChunkData = new long[LodUtil.CHUNK_WIDTH][LodUtil.CHUNK_WIDTH][];
+				for (int x = 0; x < LodUtil.CHUNK_WIDTH; x++)
+				{
+					for (int z = 0; z < LodUtil.CHUNK_WIDTH; z++)
+					{
+						long[] array = testRegion.getAllData(LodUtil.BLOCK_DETAIL_LEVEL, x + startingBlockPosX, z + startingBlockPosZ);
+						testChunkData[x][z] = array;
+					}
+				}
+				
+				
+				// get the player data for this dimension folder
+				PlayerData testPlayerData = new PlayerData(testDimFolder);
+				LOGGER.info("Last known player pos: [" + testPlayerData.playerBlockPos.getX() + "," + testPlayerData.playerBlockPos.getY() + "," + testPlayerData.playerBlockPos.getZ() + "]");
+				
+				// check if the block positions are close
+				int playerBlockDist = testPlayerData.playerBlockPos.getManhattanDistance(playerData.playerBlockPos);
+				ApiShared.LOGGER.info("Player block position distance between saved sub dimension and first seen is [" + playerBlockDist + "]");
+				
+				
+				// check if the chunk is actually empty
+				if (isDataEmpty(testChunkData))
+				{
+					String message = "The test chunk for dimension folder [" + LodUtil.shortenString(testDimFolder.getName(), 8) + "] and chunk pos (" + playerChunkPos.getX() + "," + playerChunkPos.getZ() + ") is empty. This is expected if the position is outside the sub-dimension's generated area.";
+					LOGGER.info(message);
+					continue;
+				}
+				
+				
+				// compare the two LODs
+				int equalDataPoints = 0;
+				int totalDataPointCount = 0;
+				for (int x = 0; x < LodUtil.CHUNK_WIDTH; x++)
+				{
+					for (int z = 0; z < LodUtil.CHUNK_WIDTH; z++)
+					{
+						for (int y = 0; y < newChunkData[x][z].length; y++)
+						{
+							if (newChunkData[x][z][y] == testChunkData[x][z][y])
+							{
+								equalDataPoints++;
+							}
+							totalDataPointCount++;
+							
+							if (!DataPointUtil.doesItExist(newChunkData[x][z][y]) || !DataPointUtil.doesItExist(testChunkData[x][z][y]))
+								break;
+						}
+					}
+				}
+				
+				
+				// determine if this world is closer to the newly loaded world
+				SubDimCompare subDimCompare = new SubDimCompare(equalDataPoints, totalDataPointCount, playerBlockDist, testDimFolder);
+				if (mostSimilarSubDim == null || subDimCompare.compareTo(mostSimilarSubDim) > 0)
+				{
+					mostSimilarSubDim = subDimCompare;
+				}
+				
+				LOGGER.info("Sub dimension [" + LodUtil.shortenString(testDimFolder.getName(), 8) + "...] is current dimension probability: " + LodUtil.shortenString(subDimCompare.getPercentEqual() + "", 5) + " (" + equalDataPoints + "/" + totalDataPointCount + ")");
+			}
+			catch (Exception e)
+			{
+				// this sub dimension isn't formatted correctly
+				// for now we are just assuming it is an unrelated file
+			}
+		}
+		
+		// TODO if two sub dimensions contain the same LODs merge them
+		
+		
+		
+		// the first seen player data is no longer needed, the sub dimension has been determined
+		firstSeenPlayerData = null;
+		
+		
+		if (mostSimilarSubDim != null && mostSimilarSubDim.isValidSubDim())
+		{
+			// we found a world folder that is similar, use it
+			
+			LOGGER.info("Sub Dimension set to: [" +  LodUtil.shortenString(mostSimilarSubDim.folder.getName(), 8) + "...] with an equality of [" + mostSimilarSubDim.getPercentEqual() + "]");
+			return mostSimilarSubDim.folder;
+		}
+		else
+		{
+			// no world folder was found, create a new one
+			
+			double highestEqualityPercent = mostSimilarSubDim != null ? mostSimilarSubDim.getPercentEqual() : 0;
+			
+			String newId = UUID.randomUUID().toString();
+			String message = "No suitable sub dimension found. The highest equality was [" + LodUtil.shortenString(highestEqualityPercent + "", 5) + "]. Creating a new sub dimension with ID: " + LodUtil.shortenString(newId, 8) + "...";
+			LOGGER.info(message);
+			return GetDimensionFolder(newlyLoadedDim.dimension, newId);
+		}
+	}
+	
+	/**
+	 * Returns the dimension folder with the specific ID if specified. <br>
+	 * If the worldId is empty or null this returns the dimension parent folder <br>
+	 * Example folder names: "dim_overworld/worldId", "dim_the_nether/worldId"
+	 */
+	public static File GetDimensionFolder(IDimensionTypeWrapper newDimensionType, String worldId)
+	{
+		// prevent null pointers
+		if (worldId == null)
+			worldId = "";
+		
+		// make sure the ID is a valid path
+		worldId = worldId.replaceAll(LodUtil.INVALID_FILE_CHARACTERS_REGEX, "");
+		
+		try
+		{
+			if (MC.hasSinglePlayerServer())
+			{
+				// local world
+				
+				IWorldWrapper serverWorld = LodUtil.getServerWorldFromDimension(newDimensionType);
+				return new File(serverWorld.getSaveFolder().getCanonicalFile().getPath() + File.separatorChar + "lod" + File.separatorChar + worldId);
+			}
+			else
+			{
+				// multiplayer
+				return new File(MC.getGameDirectory().getCanonicalFile().getPath() +
+						File.separatorChar + "Distant_Horizons_server_data" + File.separatorChar + MC.getCurrentDimensionId() + File.separatorChar + worldId);
+			}
+		}
+		catch (IOException e)
+		{
+			LOGGER.error("Unable to get dimension folder for dimension [" + newDimensionType.getDimensionName() + "]", e);
+			return null;
+		}
+	}
+	
+	
+	/** Returns true if the given chunk is valid to test */
+	public boolean CanDetermineDimensionFolder(IChunkWrapper chunk)
+	{
+		// we can only guess if the given chunk can be converted into a LOD
+		return LodBuilder.canGenerateLodFromChunk(chunk);
+	}
+	
+	
+	/** Used for debugging, returns true if every data point is 0 */
+	private static boolean isDataEmpty(long[][][] chunkData)
+	{
+		for (long[][] xArray : chunkData)
+		{
+			for (long[] zArray : xArray)
+			{
+				for (long dataPoint : zArray)
+				{
+					if (dataPoint != 0)
+					{
+						return false;
+					}
+				}
+			}
+		}
+		
+		return true;
+	}
+	
+	/** Returns true if the given folder holds valid Lod Dimension data */
+	public static boolean isValidSubDimensionDirectory(File potentialFolder)
+	{
+		if (!potentialFolder.isDirectory())
+			// it needs to be a folder
+			return false;
+		
+		if (potentialFolder.listFiles() == null)
+			// it needs to have folders in it
+			return false;
+		
+		// check if there is at least one VerticalQuality folder in this directory
+		for (File internalFolder : potentialFolder.listFiles())
+		{
+			if (VerticalQuality.getByName(internalFolder.getName()) != null)
+			{
+				// one of the internal folders is a VerticalQuality folder
+				return true;
+			}
+		}
+		
+		return false;
+	}
+	
+	/**
+	 * Moves any folders from the old save location
+	 * (directly under the dimension type)
+	 * to a sub-dimension folder with the given name.
+	 */
+	private void moveOldSaveFoldersIfNecessary(File dimensionFolder, IDimensionTypeWrapper dimensionType, String subDimensionName) throws IOException
+	{
+		// if there are no files this will return null
+		if (dimensionFolder.listFiles() == null)
+			return;
+		
+		
+		for (File folder : dimensionFolder.listFiles())
+		{
+			if (VerticalQuality.getByName(folder.getName()) != null)
+			{
+				// this is a LOD save folder
+				// create a new sub dimension and move the data into it
+				
+				File newDimension = GetDimensionFolder(dimensionType, subDimensionName);
+				newDimension.mkdirs();
+				
+				File oldDataNewPath = new File(newDimension.getPath() + File.separatorChar + folder.getName());
+				Files.move(folder.toPath(), oldDataNewPath.toPath(), StandardCopyOption.REPLACE_EXISTING);
+			}
+			else
+			{
+				// ignore this folder
+			}
+		}
+	}
+	
+	
+	
+	
+	
+	
+	
+	public void updatePlayerData()
+	{
+		playerData.updateData(MC);
+	}
+	
+	/** saves any necessary player data to the given world folder */
+	public void saveDimensionPlayerData(File worldFolder)
+	{
+		// get and create the file and path if they don't exist
+		File file = PlayerData.getFileForDimensionFolder(worldFolder);
+		if (!file.exists())
+		{
+			try
+			{
+				file.getParentFile().mkdirs();
+				file.createNewFile();
+			}
+			catch (IOException e)
+			{
+				LOGGER.error("Unable to save player dimension data for world folder [" + worldFolder.getPath() + "].", e);
+				return;
+			}
+		}
+		
+		// determine the playerData
+		IMinecraftClientWrapper mc = SingletonHandler.get(IMinecraftClientWrapper.class);
+		PlayerData playerdata = new PlayerData(mc);
+		
+		// write the data to file
+		CommentedFileConfig toml = CommentedFileConfig.builder(file).build();
+		playerdata.toTomlFile(toml);
+	}
+	
+	
+}

src/main/java/com/seibel/lod/core/handlers/LodDimensionOldFileStructureHandler.java

@@ -0,0 +1,277 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.handlers;
+
+import java.io.DataInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.locks.ReentrantLock;
+
+import com.seibel.lod.core.api.ApiShared;
+import org.apache.commons.compress.compressors.xz.XZCompressorInputStream;
+
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.enums.config.DistanceGenerationMode;
+import com.seibel.lod.core.enums.config.VerticalQuality;
+import com.seibel.lod.core.objects.lod.RegionPos;
+import com.seibel.lod.core.objects.lod.VerticalLevelContainer;
+import com.seibel.lod.core.util.LodUtil;
+
+public class LodDimensionOldFileStructureHandler
+{
+
+	/** This is the dimension that owns this file handler */
+	private final File dimensionDataSaveFolder;
+	private final LodDimensionFileHandler newFileHandler;
+	
+	enum OldDistanceGenerationMode {
+		NONE,
+		BIOME_ONLY,
+		BIOME_ONLY_SIMULATE_HEIGHT,
+		SURFACE,
+		FEATURES,
+		FULL
+	}
+	
+	
+	
+	/** lod */
+	private static final String FILE_NAME_PREFIX = "lod";
+	/** .txt */
+	private static final String FILE_EXTENSION = ".xz";
+	/** detail- */
+	private static final String DETAIL_FOLDER_NAME_PREFIX = "detail-";
+	
+	private static final String RETIRED_OLD_STRUCT_POSTFIX = "-RETIRED-CAN-BE-DELETED";
+	
+	public static final int LOD_SAVE_FILE_VERSION = 8;
+	public static final ExecutorService mergerThreads = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
+	
+	private static class TempLodRegion {
+		final VerticalLevelContainer[] containers;
+		final VerticalQuality vertQual;
+		final int posX;
+		final int posZ;
+		TempLodRegion(VerticalQuality vertQual, RegionPos pos) {
+			this.vertQual = vertQual;
+			posX = pos.x;
+			posZ = pos.z;
+			containers = new VerticalLevelContainer[LodUtil.REGION_DETAIL_LEVEL+1];
+		}
+	}
+	
+	
+	
+	public LodDimensionOldFileStructureHandler(LodDimensionFileHandler fileHandler)
+	{
+		dimensionDataSaveFolder = fileHandler.dimensionDataSaveFolder;
+		newFileHandler = fileHandler;
+	}
+	
+
+	private void loadGenModeToRegion(TempLodRegion region, OldDistanceGenerationMode genMode)
+	{
+		int regionX = region.posX;
+		int regionZ = region.posZ;
+		for (byte detail = LodUtil.REGION_DETAIL_LEVEL; detail >= 0; detail--) {
+			File file = new File(getFileBasePath() + region.vertQual + File.separatorChar +
+					genMode + File.separatorChar + DETAIL_FOLDER_NAME_PREFIX + detail + File.separatorChar +
+					FILE_NAME_PREFIX + "." + regionX + "." + regionZ + FILE_EXTENSION);
+			if (!file.exists()) continue;
+			if (!file.isFile()) continue;
+			long fileSize = file.length();
+			if (fileSize == 0) continue;
+
+			try (FileInputStream fileInStream = new FileInputStream(file))
+			{
+				XZCompressorInputStream inputStream = new XZCompressorInputStream(fileInStream);
+				int fileVersion;
+				fileVersion = inputStream.read();
+				
+				// check if this file can be read by this file handler
+				if (fileVersion < 6)
+				{
+					// the file we are reading is too old.
+					// close the reader and delete the file.
+					inputStream.close();
+					ApiShared.LOGGER.info("Outdated LOD region file for region: (" + regionX + "," + regionZ + ")"
+							+ " version found: " + fileVersion
+							+ ", version requested: " + LOD_SAVE_FILE_VERSION
+							+ ". this region file will not be read and merged into the new save structure.");
+					continue;
+				}
+				else if (fileVersion > LOD_SAVE_FILE_VERSION)
+				{
+					// the file we are reading is a newer version,
+					// close the reader and ignore the file, we don't
+					// want to accidentally delete anything the user may want.
+					inputStream.close();
+					ApiShared.LOGGER.info("Unexpected newer LOD region file for region: (" + regionX + "," + regionZ + ")"
+							+ " version found: " + fileVersion
+							+ ", version requested: " + LOD_SAVE_FILE_VERSION
+							+ " this region file will not be read and merged into the new save structure.");
+					continue;
+				}
+				else if (fileVersion < LOD_SAVE_FILE_VERSION)
+				{
+					ApiShared.LOGGER.debug("Old LOD region file for region: (" + regionX + "," + regionZ + ")"
+							+ " version found: " + fileVersion
+							+ ", version requested: " + LOD_SAVE_FILE_VERSION
+							+ ". this region file be read, updated, and merged into the new save structure.");
+				}
+				VerticalLevelContainer data = new VerticalLevelContainer(new DataInputStream(inputStream), fileVersion, detail);
+				if (region.containers[detail] == null) {
+					region.containers[detail] = data;
+				} else {
+					region.containers[detail].addChunkOfData(data.dataContainer, 0, 0, data.size, data.size, false);
+				}
+				inputStream.close();
+			}
+			catch (IOException ioEx)
+			{
+				ApiShared.LOGGER.error("LOD file read error. Unable to read xz compressed file [" + file + "] error [" + ioEx.getMessage() + "]: ");
+				ioEx.printStackTrace();
+			}
+		}
+	}
+	
+	private void saveRegion(TempLodRegion region) {
+		for (int detail=0; detail<=LodUtil.REGION_DETAIL_LEVEL; detail++) {
+			if (region.containers[detail] == null) continue;
+			newFileHandler.saveDirect(region.posX, region.posZ, region.vertQual, region.containers[detail]);
+		}
+	}
+	
+	private void loadAndMergeAndSaveRegion(VerticalQuality verticalQuality, RegionPos regionPos)
+	{
+		ApiShared.LOGGER.info("Merging region "+regionPos+" at "+verticalQuality+"...");
+		TempLodRegion region = new TempLodRegion(verticalQuality, regionPos);
+		ApiShared.LOGGER.info("Reading data...");
+		loadGenModeToRegion(region, OldDistanceGenerationMode.FULL);
+		loadGenModeToRegion(region, OldDistanceGenerationMode.FEATURES);
+		loadGenModeToRegion(region, OldDistanceGenerationMode.SURFACE);
+		loadGenModeToRegion(region, OldDistanceGenerationMode.BIOME_ONLY_SIMULATE_HEIGHT);
+		loadGenModeToRegion(region, OldDistanceGenerationMode.BIOME_ONLY);
+		loadGenModeToRegion(region, OldDistanceGenerationMode.NONE);
+		ApiShared.LOGGER.info("Writing data...");
+		saveRegion(region);
+		ApiShared.LOGGER.info("region "+regionPos+" at "+verticalQuality+" merged");
+	}
+	
+	
+	
+	private RegionPos parseFileName(String fileName) {
+		if (!fileName.endsWith(FILE_EXTENSION)) return null;
+		if (!fileName.startsWith(FILE_NAME_PREFIX)) return null;
+		String[] array = fileName.split("\\."); // Array content: "lod", "-1", "1", ".xz"
+		if (array.length!=4) return null;
+		try {
+			return new RegionPos(Integer.parseInt(array[1]), Integer.parseInt(array[2]));
+		} catch (NumberFormatException e) {
+			return null;
+		}
+	}
+	
+	private HashSet<RegionPos> scanOldRegionFiles(VerticalQuality vertQual, OldDistanceGenerationMode genMode) {
+		HashSet<RegionPos> result = new HashSet<RegionPos>();
+		File baseBaseFolder = new File(getFileBasePath() + vertQual + File.separatorChar + genMode);
+		if (!baseBaseFolder.exists()) return result;
+		for (byte detail=0; detail <= LodUtil.REGION_DETAIL_LEVEL; detail++) {
+			File baseFolder = new File(getFileBasePath() + vertQual + File.separatorChar +
+					genMode + File.separatorChar + DETAIL_FOLDER_NAME_PREFIX + detail);
+			if (!baseFolder.exists()) continue;
+			if (!baseFolder.isDirectory()) continue;
+			File[] subFiles = baseFolder.listFiles();
+			for (File subFile : subFiles) {
+				if (!subFile.isFile()) continue;
+				if (!subFile.canRead()) continue;
+				RegionPos pos = parseFileName(subFile.getName());
+				if (pos != null) result.add(pos);
+			}
+		}
+		return result;
+	}
+	
+	private void renameOldFileStructure(VerticalQuality vertQual, OldDistanceGenerationMode genMode) {
+		File baseBaseFolder = new File(getFileBasePath() + vertQual + File.separatorChar + genMode);
+		if (!baseBaseFolder.exists()) return;
+		baseBaseFolder.renameTo(new File(getFileBasePath() + vertQual + File.separatorChar + genMode + RETIRED_OLD_STRUCT_POSTFIX));
+	}
+	
+	public void mergeOldFileStructureForVertQuality(VerticalQuality vertQual) {
+		File baseFile = new File(getFileBasePath() + vertQual);
+		if (!baseFile.exists()) return;
+		if (!baseFile.isDirectory()) return;
+		HashSet<RegionPos> totalPos = new HashSet<RegionPos>();
+		totalPos.addAll(scanOldRegionFiles(vertQual, OldDistanceGenerationMode.NONE));
+		totalPos.addAll(scanOldRegionFiles(vertQual, OldDistanceGenerationMode.BIOME_ONLY));
+		totalPos.addAll(scanOldRegionFiles(vertQual, OldDistanceGenerationMode.BIOME_ONLY_SIMULATE_HEIGHT));
+		totalPos.addAll(scanOldRegionFiles(vertQual, OldDistanceGenerationMode.SURFACE));
+		totalPos.addAll(scanOldRegionFiles(vertQual, OldDistanceGenerationMode.FEATURES));
+		totalPos.addAll(scanOldRegionFiles(vertQual, OldDistanceGenerationMode.FULL));
+		ArrayList<Future<?>> futures = new ArrayList<Future<?>>();
+		for (RegionPos pos : totalPos) {
+			futures.add(mergerThreads.submit(() -> {
+				loadAndMergeAndSaveRegion(vertQual, pos);
+				return true;
+			}));
+		}
+		futures.forEach(t ->
+		{
+			try
+			{
+				t.get();
+			}
+			catch (Exception e)
+			{
+				e.printStackTrace();
+			}
+		});
+		
+		renameOldFileStructure(vertQual, OldDistanceGenerationMode.NONE);
+		renameOldFileStructure(vertQual, OldDistanceGenerationMode.BIOME_ONLY);
+		renameOldFileStructure(vertQual, OldDistanceGenerationMode.BIOME_ONLY_SIMULATE_HEIGHT);
+		renameOldFileStructure(vertQual, OldDistanceGenerationMode.SURFACE);
+		renameOldFileStructure(vertQual, OldDistanceGenerationMode.FEATURES);
+		renameOldFileStructure(vertQual, OldDistanceGenerationMode.FULL);
+	}
+
+	private String getFileBasePath()
+	{
+		try
+		{
+			return dimensionDataSaveFolder.getCanonicalPath() + File.separatorChar;
+		}
+		catch (IOException e)
+		{
+			ApiShared.LOGGER.warn("Unable to get the base save file path. Error: " + e.getMessage(), e);
+			throw new RuntimeException("DistantHorizons Get Save File Path Failure");
+		}
+	}
+	
+}

src/main/java/com/seibel/lod/core/handlers/ReflectionHandler.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -46,6 +46,7 @@ public class ReflectionHandler implements IReflectionHandler
 	private final Object mcOptionsObject;
 	
 	private Boolean sodiumPresent = null;
+	private boolean optifinePresent = false;
 	
 	
 	
@@ -87,6 +88,7 @@ public class ReflectionHandler implements IReflectionHandler
 		{
 			if (field.getName().equals("ofFogType"))
 			{
+				optifinePresent = true;
 				ofFogField = field;
 				return;
 			}
@@ -158,7 +160,11 @@ public class ReflectionHandler implements IReflectionHandler
 		}
 		return false;
 	}
-	
+	@Override
+	public boolean optifinePresent()
+	{
+		return optifinePresent;
+	}
 	
 	
 	

src/main/java/com/seibel/lod/core/handlers/dependencyInjection/DependencyHandler.java

@@ -0,0 +1,164 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.handlers.dependencyInjection;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This class takes care of tracking objects used in dependency injection.
+ * 
+ * @author James Seibel
+ * @version 3-4-2022
+ */
+public class DependencyHandler
+{
+	private final Map<Class<?>, Object> dependencies = new HashMap<Class<?>, Object>();
+	private boolean bindingFinished = false;
+	
+
+	/**
+	 * Links the given implementation object to an interface so it can be referenced later.
+	 * 
+	 * @param depenencyInterface The interface the implementation object should implement.
+	 * @param dependencyImplementation A object that implements the depenencyInterface interface.
+	 * @throws IllegalStateException if the implementation object doesn't implement 
+	 *                               the interface or the interface has already been bound.
+	 */
+	public void bind(Class<?> depenencyInterface, Object dependencyImplementation) throws IllegalStateException
+	{
+		// only allow binding before the finishBinding method is called
+		if (bindingFinished)
+		{
+			throw new IllegalStateException("The dependency [" + depenencyInterface.getSimpleName() + "] cannot be bound, Binding is finished for [" + this.getClass().getSimpleName() + "]. Make sure your bindings are happening before the [bindingFinished] method is being called.");
+		}
+		
+		
+		// make sure we haven't already bound this dependency
+		if (dependencies.containsKey(depenencyInterface))
+		{
+			throw new IllegalStateException("The dependency [" + depenencyInterface.getSimpleName() + "] has already been bound.");
+		}
+		
+		
+		// make sure the given dependency implements the necessary interfaces
+		boolean implementsInterface = checkIfClassImplements(dependencyImplementation.getClass(), depenencyInterface);
+		boolean implementsBindable = checkIfClassImplements(dependencyImplementation.getClass(), IBindable.class);
+		
+		// display any errors
+		if (!implementsInterface)
+		{
+			throw new IllegalStateException("The dependency [" + dependencyImplementation.getClass().getSimpleName() + "] doesn't implement the interface [" + depenencyInterface.getSimpleName() + "].");
+		}
+		if (!implementsBindable)
+		{
+			throw new IllegalStateException("The dependency [" + dependencyImplementation.getClass().getSimpleName() + "] doesn't implement the interface [" + IBindable.class.getSimpleName() + "].");
+		}
+		
+		
+		dependencies.put(depenencyInterface, dependencyImplementation);
+	}
+	/**
+	 * Checks if classToTest (or one of its ancestors)
+	 * implements the given interface.
+	 */
+	private boolean checkIfClassImplements(Class<?> classToTest, Class<?> interfaceToLookFor)
+	{
+		// check the parent class (if applicable)
+		if (classToTest.getSuperclass() != Object.class && classToTest.getSuperclass() != null)
+		{
+			if (checkIfClassImplements(classToTest.getSuperclass(), interfaceToLookFor))
+			{
+				return true;
+			}
+		}
+		
+		
+		// check interfaces
+		for (Class<?> implementationInterface : classToTest.getInterfaces())
+		{
+			// recurse to check interface parents if necessary
+			if (implementationInterface.getInterfaces().length != 0)
+			{
+				if (checkIfClassImplements(implementationInterface, interfaceToLookFor))
+				{
+					return true;
+				}
+			}
+			
+			if (implementationInterface.equals(interfaceToLookFor))
+			{
+				return true;
+			}
+		}
+		
+		return false;
+	}
+	
+
+	/**
+	 * Returns a dependency of type T if one has been bound.
+	 * Returns null otherwise.
+	 * 
+	 * @param <T> class of the dependency
+	 *            (inferred from the objectClass parameter)
+	 * @param interfaceClass Interface of the dependency
+	 * @return the dependency of type T
+	 * @throws ClassCastException If the dependency isn't able to be cast to type T. 
+	 *                            (this shouldn't normally happen, unless the bound object changed somehow)
+	 */
+	@SuppressWarnings("unchecked")
+	public <T extends IBindable> T get(Class<?> interfaceClass) throws ClassCastException
+	{
+		// getting dependencies should only happen after everything has been bound
+		if (!bindingFinished)
+		{
+			throw new IllegalStateException("Binding hasn't been finished for [" + this.getClass().getSimpleName() + "]. Make sure you are calling the [bindingFinished] method before calling [get].");
+		}
+		
+		return (T) dependencies.get(interfaceClass);
+	}
+	
+	
+	/**
+	 * Should only be called after all Binds have been done.
+	 * Calls the delayedSetup method for each dependency. <br> <br>
+	 * 
+	 * This is done so we can have circular dependencies.
+	 */
+	public void finishBinding()
+	{
+		// (yes technically the binding isn't finished,
+		// but this needs to be set to "true" so we can use "get")
+		bindingFinished = true;
+		
+		for (Class<?> interfaceKey : dependencies.keySet())
+		{
+			IBindable concreteObject = get(interfaceKey);
+			concreteObject.finishDelayedSetup();
+		}
+	}
+	
+	/** returns whether the finishBinding method has been called */
+	public boolean getBindingFinished()
+	{
+		return bindingFinished;
+	}
+}

src/main/java/com/seibel/lod/core/handlers/dependencyInjection/IBindable.java

@@ -0,0 +1,44 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.handlers.dependencyInjection;
+
+/**
+ * Necessary for all singletons that can be dependency injected.
+ * 
+ * @author James Seibel
+ * @version 3-4-2022
+ */
+public interface IBindable
+{
+	/**
+	 * Finish initializing this object. <br> <br>
+	 * 
+	 * Generally this should just used for getting other objects through
+	 * dependency injection and is specifically designed to allow 
+	 * for circular references. <br><br>
+	 * 
+	 * If no circular dependencies are required this method 
+	 * doesn't have to be implemented.
+	 */
+	public default void finishDelayedSetup()
+	{
+		
+	}
+}

src/main/java/com/seibel/lod/core/handlers/dependencyInjection/ModAccessorHandler.java

@@ -0,0 +1,91 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.handlers.dependencyInjection;
+
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.wrapperInterfaces.modAccessor.IModAccessor;
+
+/**
+ * This class takes care of dependency injection for mods accessors. (for mod compatibility
+ * support).
+ * 
+ * This is basically the same as the SingletonHandler, except it can return null. 
+ * Getting null either means the mod isn't loaded in the game
+ * or it hasn't been implemented for the given Minecraft version.
+ * 
+ * @author James Seibel
+ * @author Leetom
+ * @version 3-1-2022
+ */
+public class ModAccessorHandler
+{
+	private static final DependencyHandler dependencyHandler = new DependencyHandler();
+	
+	
+	/**
+	 * Links the given mod accessor to an interface so it can be referenced later.
+	 * 
+	 * @param interfaceClass The interface the mod accessor should implement.
+	 * @param modAccessor An object that implements the interfaceClass interface.
+	 * @throws IllegalStateException if the mod accessor doesn't implement 
+	 *                               the interface or the interface has already been bound.
+	 */
+	public static void bind(Class<? extends IModAccessor> interfaceClass, IModAccessor modAccessor)
+			throws IllegalStateException
+	{
+		dependencyHandler.bind(interfaceClass, modAccessor);
+		ApiShared.LOGGER.info("Registored mod comatibility accessor for " + modAccessor.getModName());
+	}
+	
+	/**
+	 * Returns a mod accessor of type T if one has been bound.
+	 * Returns null otherwise.
+	 * 
+	 * @param <T> class of the mod accessor
+	 *            (inferred from the objectClass parameter)
+	 * @param interfaceClass Interface of the mod accessor
+	 * @return the dependency of type T
+	 * @throws ClassCastException If the mod accessor isn't able to be cast to type T. 
+	 *                            (this shouldn't normally happen, unless the bound object changed somehow)
+	 */
+	public static <T extends IModAccessor> T get(Class<T> objectClass) throws ClassCastException
+	{
+		return dependencyHandler.get(objectClass);
+	}
+	
+	
+	/**
+	 * Should only be called after all Binds have been done.
+	 * Calls the delayedSetup method for each dependency. <br> <br>
+	 * 
+	 * This is done so we can have circular dependencies.
+	 */
+	public static void finishBinding()
+	{
+		dependencyHandler.finishBinding();
+	}
+	
+	/** returns whether the finishBinding method has been called */
+	public static boolean bindingFinished() 
+	{
+		return dependencyHandler.getBindingFinished();
+	}
+	
+}

src/main/java/com/seibel/lod/core/handlers/dependencyInjection/SingletonHandler.java

@@ -0,0 +1,90 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.handlers.dependencyInjection;
+
+/**
+ * This class takes care of dependency injection
+ * for singletons.
+ * 
+ * @author James Seibel
+ * @version 3-5-2022
+ */
+public class SingletonHandler
+{
+	private static final DependencyHandler dependencyHandler = new DependencyHandler();
+		
+	
+	/**
+	 * Links the given implementation object to an interface so it can be referenced later.
+	 * 
+	 * @param depenencyInterface The interface the implementation object should implement.
+	 * @param dependencyImplementation A object that implements the depenencyInterface interface.
+	 * @throws IllegalStateException if the implementation object doesn't implement 
+	 *                               the interface or the interface has already been bound.
+	 */
+	public static void bind(Class<?> interfaceClass, Object singletonReference) throws IllegalStateException
+	{
+		dependencyHandler.bind(interfaceClass, singletonReference);
+	}
+
+	/**
+	 * Returns a dependency of type T if one has been bound.
+	 * Returns null otherwise.
+	 * 
+	 * @param <T> class of the dependency
+	 *            (inferred from the objectClass parameter)
+	 * @param interfaceClass Interface of the dependency
+	 * @return the dependency of type T
+	 * @throws NullPointerException If no dependency was bound.
+	 * @throws ClassCastException If the dependency isn't able to be cast to type T. 
+	 *                            (this shouldn't normally happen, unless the bound object changed somehow)
+	 */
+	public static <T> T get(Class<T> interfaceClass) throws NullPointerException, ClassCastException
+	{
+		T foundObject = dependencyHandler.get(interfaceClass);
+		
+		// throw an error if the given singleton doesn't exist.
+		if (foundObject == null)
+		{
+			throw new NullPointerException("The singleton [" + interfaceClass.getSimpleName() + "] was never bound. If you are calling [bind], make sure it is happening before you call [get].");
+		}
+		
+		return foundObject;
+	}
+	
+	
+	/**
+	 * Should only be called after all Binds have been done.
+	 * Calls the delayedSetup method for each dependency. <br> <br>
+	 * 
+	 * This is done so we can have circular dependencies.
+	 */
+	public static void finishBinding()
+	{
+		dependencyHandler.finishBinding();
+	}
+	
+	/** returns whether the finishBinding method has been called */
+	public static boolean getBindingFinished() 
+	{
+		return dependencyHandler.getBindingFinished();
+	}
+	
+}

src/main/java/com/seibel/lod/core/handlers/dimensionFinder/PlayerData.java

@@ -0,0 +1,131 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.handlers.dimensionFinder;
+
+
+import com.electronwill.nightconfig.core.file.CommentedFileConfig;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
+import com.seibel.lod.core.wrapperInterfaces.block.AbstractBlockPosWrapper;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+
+import java.io.File;
+
+/**
+ * Data container for any player data we can use to differentiate one dimension from another.
+ *
+ * @author James Seibel
+ * @version 2022-3-26
+ */
+public class PlayerData
+{
+	public static final IWrapperFactory FACTORY = SingletonHandler.get(IWrapperFactory.class);
+	
+	private static final String playerDataFileName = "_playerData.toml";
+	
+	
+	public static final String PLAYER_BLOCK_POS_X_PATH = "playerBlockPosX";
+	public static final String PLAYER_BLOCK_POS_Y_PATH = "playerBlockPosY";
+	public static final String PLAYER_BLOCK_POS_Z_PATH = "playerBlockPosZ";
+	public AbstractBlockPosWrapper playerBlockPos;
+	
+	// not implemented yet
+	public static final String WORLD_SPAWN_POS_X_PATH = "worldSpawnBlockPosX";
+	public static final String WORLD_SPAWN_POS_Y_PATH = "worldSpawnBlockPosY";
+	public static final String WORLD_SPAWN_POS_Z_PATH = "worldSpawnBlockPosZ";
+	/**
+	 * The client world has access to a spawn point, so this should be possible to fill in.
+	 * I'm not sure what this will look like for worlds that don't have a spawn point.
+	 */
+	public AbstractBlockPosWrapper worldSpawnPointBlockPos;
+	
+	
+	
+	public PlayerData(IMinecraftClientWrapper mc)
+	{
+		updateData(mc);
+	}
+	
+	public PlayerData(File dimensionFolder)
+	{
+		File file = getFileForDimensionFolder(dimensionFolder);
+		CommentedFileConfig toml = CommentedFileConfig.builder(file).build();
+		
+		toml.load();
+		
+		
+		// get the player block pos if it is specified
+		if (toml.contains(PLAYER_BLOCK_POS_X_PATH)
+				&& toml.contains(PLAYER_BLOCK_POS_Y_PATH)
+				&& toml.contains(PLAYER_BLOCK_POS_Z_PATH))
+		{
+			int x = toml.getIntOrElse(PLAYER_BLOCK_POS_X_PATH, 0);
+			int y = toml.getIntOrElse(PLAYER_BLOCK_POS_Y_PATH, 0);
+			int z = toml.getIntOrElse(PLAYER_BLOCK_POS_Z_PATH, 0);
+			this.playerBlockPos = FACTORY.createBlockPos(x, y, z);
+		}
+		else
+		{
+			this.playerBlockPos = FACTORY.createBlockPos(0, 0, 0);
+		}
+	}
+	
+	
+	
+	public static File getFileForDimensionFolder(File file)
+	{
+		return new File(file.getPath() + File.separatorChar + playerDataFileName);
+	}
+	
+	
+	/** Should be called often to make sure this object is up to date with the player's info */
+	public void updateData(IMinecraftClientWrapper mc)
+	{
+		if (mc.playerExists())
+		{
+			this.playerBlockPos = mc.getPlayerBlockPos();
+		}
+	}
+	
+	/** Writes everything from this object to the file given. */
+	public void toTomlFile(CommentedFileConfig toml)
+	{
+		if (playerBlockPos == null)
+		{
+			toml.remove(PLAYER_BLOCK_POS_X_PATH);
+			toml.remove(PLAYER_BLOCK_POS_Y_PATH);
+			toml.remove(PLAYER_BLOCK_POS_Z_PATH);
+		} else {
+			// player block pos
+			toml.add(PLAYER_BLOCK_POS_X_PATH, playerBlockPos.getX());
+			toml.add(PLAYER_BLOCK_POS_Y_PATH, playerBlockPos.getY());
+			toml.add(PLAYER_BLOCK_POS_Z_PATH, playerBlockPos.getZ());
+		}
+		toml.save();
+	}
+	
+	
+	@Override
+	public String toString()
+	{
+		return "PlayerBlockPos: [" + playerBlockPos.getX() + "," + playerBlockPos.getY() + "," + playerBlockPos.getZ() + "]";
+	}
+}
+

src/main/java/com/seibel/lod/core/handlers/dimensionFinder/SubDimCompare.java

@@ -0,0 +1,85 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.handlers.dimensionFinder;
+
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+
+/**
+ * Contains data used to compare different sub LodDimensions.
+ * Sub Dimensions are the different folders under a dimension.
+ * For example: "\Distant_Horizons_server_data\server_1\dim_the_nether\6fb97c01-e4c7-4634-87db-36b1e490e4c3"
+ * is a sub dimension for the server "server_1" in the nether.
+ *
+ * @author James Seibel
+ * @version 2022-3-26
+ */
+public class SubDimCompare implements Comparable<SubDimCompare>
+{
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	
+	
+	public int equalDataPoints = 0;
+	public int totalDataPoints = 0;
+	public int playerPosDist = 0;
+	public File folder = null;
+	
+	
+	public SubDimCompare(int newEqualDataPoints, int newTotalDataPoints, int newPlayerPosDistance, File newSubDimFolder)
+	{
+		this.equalDataPoints = newEqualDataPoints;
+		this.totalDataPoints = newTotalDataPoints;
+		this.playerPosDist = newPlayerPosDistance;
+		
+		this.folder = newSubDimFolder;
+	}
+	
+	/** returns a number between 0 (not equal) and 1 (totally equal) */
+	public double getPercentEqual()
+	{
+		return (double) equalDataPoints / (double) totalDataPoints;
+	}
+	
+	
+	@Override
+	public int compareTo(@NotNull SubDimCompare other)
+	{
+		if (this.equalDataPoints != other.equalDataPoints)
+		{
+			// compare based on data points
+			return Integer.compare(this.equalDataPoints, other.equalDataPoints);
+		}
+		else
+		{
+			// break ties based on player position
+			return Integer.compare(this.playerPosDist, other.playerPosDist);
+		}
+	}
+	
+	/** Returns true if this sub dimension is close enough to be considered a valid sub dimension */
+	public boolean isValidSubDim()
+	{
+		double minimumSimilarityRequired = CONFIG.client().multiplayer().getMultiDimensionRequiredSimilarity();
+		return this.getPercentEqual() >= minimumSimilarityRequired || this.playerPosDist <= 3;
+	}
+}

src/main/java/com/seibel/lod/core/logging/ConfigBasedLogger.java

@@ -0,0 +1,92 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.logging;
+
+import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.enums.config.LoggerMode;
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.message.Message;
+
+import java.lang.ref.WeakReference;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.function.Supplier;
+
+public class ConfigBasedLogger {
+    public static final List<WeakReference<ConfigBasedLogger>> loggers
+            = Collections.synchronizedList(new LinkedList<WeakReference<ConfigBasedLogger>>());
+    public static synchronized void updateAll() {
+        loggers.removeIf((logger) -> logger.get()==null);
+        loggers.forEach((logger) -> {
+            ConfigBasedLogger l = logger.get();
+            if (l!=null) l.update();
+        });
+    }
+
+    private LoggerMode mode;
+    private final Supplier<LoggerMode> getter;
+    private final Logger logger;
+    public ConfigBasedLogger(Logger logger, Supplier<LoggerMode> configQuery) {
+        getter = configQuery;
+        mode = getter.get();
+        this.logger = logger;
+        loggers.add(new WeakReference<>(this));
+    }
+    public void update() {
+        mode = getter.get();
+    }
+    public boolean canMaybeLog() {return mode != LoggerMode.DISABLED;}
+
+    public void log(Level level, String str, Object... param) {
+
+        Message msg = logger.getMessageFactory().newMessage(str, param);
+        String msgStr = msg.getFormattedMessage();
+        if (mode.levelForFile.isLessSpecificThan(level)) {
+            Level logLevel = level.isLessSpecificThan(Level.INFO) ? Level.INFO : level;
+            if (param.length > 0 && param[param.length-1] instanceof Throwable)
+                logger.log(logLevel, msgStr, (Throwable)param[param.length-1]);
+            else logger.log(logLevel, msgStr);
+        }
+        if (mode.levelForChat.isLessSpecificThan(level)) {
+            if (param.length > 0 && param[param.length-1] instanceof Throwable)
+                ClientApi.logToChat(level, msgStr + "\nat\n" + Arrays.toString(((Throwable) param[param.length - 1]).getStackTrace()));
+            else ClientApi.logToChat(level, msgStr);
+        }
+    }
+
+    public void error(String str, Object... param) {
+        log(Level.ERROR, str, param);
+    }
+    public void warn(String str, Object... param) {
+        log(Level.WARN, str, param);
+    }
+    public void info(String str, Object... param) {
+        log(Level.INFO, str, param);
+    }
+    public void debug(String str, Object... param) {
+        log(Level.DEBUG, str, param);
+    }
+    public void trace(String str, Object... param) {
+        log(Level.TRACE, str, param);
+    }
+}

src/main/java/com/seibel/lod/core/logging/ConfigBasedSpamLogger.java

@@ -0,0 +1,139 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.logging;
+
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.enums.config.LoggerMode;
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.Logger;
+import org.apache.logging.log4j.message.Message;
+
+import java.lang.ref.WeakReference;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Supplier;
+
+public class ConfigBasedSpamLogger {
+    public static final List<WeakReference<ConfigBasedSpamLogger>> loggers
+            = Collections.synchronizedList(new LinkedList<WeakReference<ConfigBasedSpamLogger>>());
+    public static synchronized void updateAll(boolean flush) {
+        loggers.removeIf((logger) -> logger.get()==null);
+        loggers.forEach((logger) -> {
+            ConfigBasedSpamLogger l = logger.get();
+            if (l!=null) l.update();
+            if (l!=null && flush) l.reset();
+        });
+    }
+
+    private LoggerMode mode;
+    private final Supplier<LoggerMode> getter;
+    private final int maxLogCount;
+    private final AtomicInteger logTries = new AtomicInteger(0);
+    private final Logger logger;
+
+    public ConfigBasedSpamLogger(Logger logger, Supplier<LoggerMode> configQuery, int maxLogPerSec) {
+        getter = configQuery;
+        mode = getter.get();
+        maxLogCount = maxLogPerSec;
+        this.logger = logger;
+        loggers.add(new WeakReference<>(this));
+    }
+    public void reset() {logTries.set(0);}
+    public boolean canMaybeLog() {return mode != LoggerMode.DISABLED && logTries.get() < maxLogCount;}
+    public void update() {
+        mode = getter.get();
+    }
+
+    public void log(Level level, String str, Object... param) {
+        if (logTries.get() >= maxLogCount) return;
+
+        Message msg = logger.getMessageFactory().newMessage(str, param);
+        String msgStr = msg.getFormattedMessage();
+        if (mode.levelForFile.isLessSpecificThan(level)) {
+            Level logLevel = level.isLessSpecificThan(Level.INFO) ? Level.INFO : level;
+            if (param.length > 0 && param[param.length-1] instanceof Throwable)
+                logger.log(logLevel, msgStr, (Throwable)param[param.length-1]);
+            else logger.log(logLevel, msgStr);
+        }
+        if (mode.levelForChat.isLessSpecificThan(level)) {
+            if (param.length > 0 && param[param.length - 1] instanceof Throwable)
+                ClientApi.logToChat(level, msgStr + "\nat\n" + Arrays.toString(((Throwable) param[param.length - 1]).getStackTrace()));
+            else ClientApi.logToChat(level, msgStr);
+        }
+    }
+
+    public void error(String str, Object... param) {
+        log(Level.ERROR, str, param);
+    }
+    public void warn(String str, Object... param) {
+        log(Level.WARN, str, param);
+    }
+    public void info(String str, Object... param) {
+        log(Level.INFO, str, param);
+    }
+    public void debug(String str, Object... param) {
+        log(Level.DEBUG, str, param);
+    }
+    public void trace(String str, Object... param) {
+        log(Level.TRACE, str, param);
+    }
+
+    public void incLogTries() {
+        logTries.getAndIncrement();
+    }
+
+    public void logInc(Level level, String str, Object... param) {
+        if (logTries.getAndIncrement() >= maxLogCount) return;
+
+        Message msg = logger.getMessageFactory().newMessage(str, param);
+        String msgStr = msg.getFormattedMessage();
+        if (mode.levelForFile.isLessSpecificThan(level)) {
+            Level logLevel = level.isLessSpecificThan(Level.INFO) ? Level.INFO : level;
+            if (param.length > 0 && param[param.length-1] instanceof Throwable)
+                logger.log(logLevel, msgStr, (Throwable)param[param.length-1]);
+            else logger.log(logLevel, msgStr);
+        }
+        if (mode.levelForChat.isLessSpecificThan(level)) {
+            if (param.length > 0 && param[param.length - 1] instanceof Throwable)
+                ClientApi.logToChat(level, msgStr + "\nat\n" + Arrays.toString(((Throwable) param[param.length - 1]).getStackTrace()));
+            else ClientApi.logToChat(level, msgStr);
+        }
+    }
+
+    public void errorInc(String str, Object... param) {
+        logInc(Level.ERROR, str, param);
+    }
+    public void warnInc(String str, Object... param) {
+        logInc(Level.WARN, str, param);
+    }
+    public void infoInc(String str, Object... param) {
+        logInc(Level.INFO, str, param);
+    }
+    public void debugInc(String str, Object... param) {
+        logInc(Level.DEBUG, str, param);
+    }
+    public void traceInc(String str, Object... param) {
+        logInc(Level.TRACE, str, param);
+    }
+}

src/main/java/com/seibel/lod/core/logging/SpamReducedLogger.java

@@ -0,0 +1,97 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.logging;
+
+import java.lang.ref.WeakReference;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import com.seibel.lod.core.api.ApiShared;
+import org.apache.logging.log4j.Level;
+
+public class SpamReducedLogger {
+	public static final List<WeakReference<SpamReducedLogger>> loggers
+			= Collections.synchronizedList(new LinkedList<WeakReference<SpamReducedLogger>>());
+	public static synchronized void flushAll() {
+		loggers.removeIf((logger) -> logger.get()==null);
+		loggers.forEach((logger) -> {
+			SpamReducedLogger l = logger.get();
+			if (l!=null) l.reset();
+		});
+	}
+
+	private final int maxLogCount;
+	private final AtomicInteger logTries = new AtomicInteger(0);
+
+	public SpamReducedLogger(int maxLogPerSec) {
+		maxLogCount = maxLogPerSec;
+		loggers.add(new WeakReference<SpamReducedLogger>(this));
+	}
+	public void reset() {logTries.set(0);}
+	public boolean canMaybeLog() {return logTries.get() < maxLogCount;}
+
+	public void log(Level level, String str, Object... param) {
+		if (logTries.get() >= maxLogCount) return;
+		ApiShared.LOGGER.log(level.isLessSpecificThan(Level.INFO) ? Level.INFO : level, str, param);
+	}
+
+	public void error(String str, Object... param) {
+		log(Level.ERROR, str, param);
+	}
+	public void warn(String str, Object... param) {
+		log(Level.WARN, str, param);
+	}
+	public void info(String str, Object... param) {
+		log(Level.INFO, str, param);
+	}
+	public void debug(String str, Object... param) {
+		log(Level.DEBUG, str, param);
+	}
+	public void trace(String str, Object... param) {
+		log(Level.TRACE, str, param);
+	}
+
+	public void incLogTries() {
+		logTries.getAndIncrement();
+	}
+
+	public void logInc(Level level, String str, Object... param) {
+		if (logTries.getAndIncrement() >= maxLogCount) return;
+		ApiShared.LOGGER.log(level.isLessSpecificThan(Level.INFO) ? Level.INFO : level, str, param);
+	}
+
+	public void errorInc(String str, Object... param) {
+		logInc(Level.ERROR, str, param);
+	}
+	public void warnInc(String str, Object... param) {
+		logInc(Level.WARN, str, param);
+	}
+	public void infoInc(String str, Object... param) {
+		logInc(Level.INFO, str, param);
+	}
+	public void debugInc(String str, Object... param) {
+		logInc(Level.DEBUG, str, param);
+	}
+	public void traceInc(String str, Object... param) {
+		logInc(Level.TRACE, str, param);
+	}
+}

src/main/java/com/seibel/lod/core/objects/BlockBiomeCouple.java

@@ -1,24 +1,43 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
 package com.seibel.lod.core.objects;
 
-import com.seibel.lod.core.wrapperInterfaces.block.IBlockColorWrapper;
+/*
+import com.seibel.lod.core.wrapperInterfaces.block.BlockDetail;
 import com.seibel.lod.core.wrapperInterfaces.world.IBiomeWrapper;
 
-import java.util.HashMap;
 import java.util.Objects;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
 public class BlockBiomeCouple
 {
-	public static ConcurrentMap<IBlockColorWrapper, BlockBiomeCouple> noBiomeIstanceCache = new ConcurrentHashMap<>();
-	public static ConcurrentMap<IBiomeWrapper, ConcurrentMap<IBlockColorWrapper, BlockBiomeCouple>> withBiomeIstanceCache = new ConcurrentHashMap<>();
+	public static final ConcurrentMap<BlockDetail, BlockBiomeCouple> noBiomeIstanceCache = new ConcurrentHashMap<>();
+	public static ConcurrentMap<IBiomeWrapper, ConcurrentMap<BlockDetail, BlockBiomeCouple>> withBiomeIstanceCache = new ConcurrentHashMap<>();
 	
 	String blockName;
 	String biomeName;
 	String coupleName;
 	
 	IBiomeWrapper biomeColor;
-	IBlockColorWrapper blockColor;
+	BlockDetail blockColor;
 	
 	public static void addBlockBiomeToCache(IBlockColorWrapper blockColor){
 	}
@@ -102,3 +121,4 @@ public class BlockBiomeCouple
 	
 	
 }
+*/

src/main/java/com/seibel/lod/core/objects/BoolType.java

@@ -0,0 +1,26 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.objects;
+
+public final class BoolType {
+    public static final BoolType TRUE = new BoolType();
+    public static final BoolType FALSE = null;
+    private BoolType() {}
+}

src/main/java/com/seibel/lod/core/objects/MinDefaultMax.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/objects/ParsedIp.java

@@ -0,0 +1,109 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.objects;
+
+
+/**
+ * Represents an IP and includes a couple helper methods.
+ * 
+ * @author James Seibel
+ * @version 3-7-2022
+ */
+public class ParsedIp
+{
+	/** can be used to find numeric IPs, IE: "192.168.1.19" */
+	public static final String NUMERIC_IP_REGEX = "^[0-9]*\\.[0-9]*\\.[0-9]*\\.[0-9]*(:[0-9]*)?$";
+	
+	/**
+	 * Can be used to find if a numeric IP is a LAN IP
+	 * 
+	 * Ip list source: <br>
+	 * https://networkengineering.stackexchange.com/questions/5825/why-192-168-for-local-addresses
+	 */
+	public static final String LAN_IP_REGEX = "(10|172\\.16|192\\.168).*";
+	
+	
+	/** Examples: "192.168.1.19", "mc.hypixel.net", or "localhost" */
+	public final String ip;
+	/** 
+	 * null if the ip isn't numeric (IE: "mc.hypixel.net" or "localhost") <br>
+	 * Example: "25586"
+	 */
+	public final String port;
+	public final boolean isNumeric;
+	
+	
+	/** parses a standard IP string */
+	public ParsedIp(String fullIp)
+	{
+		fullIp = fullIp.trim();
+		
+		isNumeric = fullIp.matches(NUMERIC_IP_REGEX);
+		if (isNumeric)
+		{
+			// attempt to separate the IP and the Port
+			String[] list = fullIp.split(":");
+			if (list.length == 2)
+			{
+				// IP and Port successfully separated
+				ip = list[0];
+				port = list[1];
+			}
+			else
+			{
+				// this IP must not have a port
+				ip = fullIp;
+				port = null;
+			}
+		}
+		else
+		{
+			// text based IP, IE: "localhost"
+			ip = fullIp;
+			port = null;
+		}
+	}
+	
+	public ParsedIp(String newIp, String newPort)
+	{
+		ip = newIp;
+		port = newPort;
+		isNumeric = ip.matches(NUMERIC_IP_REGEX);
+	}
+	
+	
+	
+	
+	/** Returns if this IP is for a Local Area Network connection */
+	public boolean isLan()
+	{
+		return ip.toLowerCase().equals("localhost") || ip.matches(LAN_IP_REGEX);
+	}
+	
+	@Override
+	public String toString()
+	{
+		return ip + 
+				// only print the ":port" if a port is present
+				(port != null ? (":" + port) : "");
+	}
+}
+
+

src/main/java/com/seibel/lod/core/objects/Pos2D.java

@@ -0,0 +1,29 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.objects;
+
+public final class Pos2D {
+    public final int x;
+    public final int y;
+    public Pos2D(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+}

src/main/java/com/seibel/lod/core/objects/PosToGenerateContainer.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -31,7 +31,6 @@ public class PosToGenerateContainer
 {
 	private final int playerPosX;
 	private final int playerPosZ;
-	private final byte farMinDetail;
 	private int nearSize;
 	private int farSize;
 	
@@ -39,14 +38,10 @@ public class PosToGenerateContainer
 	private final int[][] nearPosToGenerate;
 	private final int[][] farPosToGenerate;
 	
-	
-	
-	
-	public PosToGenerateContainer(byte farMinDetail, int maxDataToGenerate, int playerPosX, int playerPosZ)
+	public PosToGenerateContainer(int maxDataToGenerate, int playerPosX, int playerPosZ)
 	{
 		this.playerPosX = playerPosX;
 		this.playerPosZ = playerPosZ;
-		this.farMinDetail = farMinDetail;
 		nearSize = 0;
 		farSize = 0;
 		nearPosToGenerate = new int[maxDataToGenerate][4];
@@ -56,46 +51,24 @@ public class PosToGenerateContainer
 	
 	
 	// TODO what is going on in this method?
-	public void addPosToGenerate(byte detailLevel, int posX, int posZ)
+	public void addNearPosToGenerate(byte detailLevel, int posX, int posZ, boolean sort)
 	{
-		int distance = LevelPosUtil.minDistance(detailLevel, posX, posZ, playerPosX, playerPosZ);
+		// FIXME: This is a cast from double to int!!! OVERFLOW MAY HAPPEN!
+		int distance = (int)LevelPosUtil.minDistance(detailLevel, posX, posZ, playerPosX, playerPosZ);
 		int index;
 		
-		if (detailLevel >= farMinDetail)
-		{
-			// We are introducing a position in the far array
-			
-			if (farSize < farPosToGenerate.length)
-				farSize++;
-			
-			index = farSize - 1;
-			while (index > 0 && LevelPosUtil.compareDistance(distance, farPosToGenerate[index - 1][3]) <= 0)
-			{
-				farPosToGenerate[index][0] = farPosToGenerate[index - 1][0];
-				farPosToGenerate[index][1] = farPosToGenerate[index - 1][1];
-				farPosToGenerate[index][2] = farPosToGenerate[index - 1][2];
-				farPosToGenerate[index][3] = farPosToGenerate[index - 1][3];
-				index--;
+		//We are introducing a position in the near array
+
+		index = nearSize;
+		if (index == nearPosToGenerate.length) {
+			if (Integer.compare(distance, nearPosToGenerate[index - 1][3]) > 0) {
+				return;
 			}
-			
-			
-			if (index != farSize - 1 || farSize != farPosToGenerate.length)
-			{
-				farPosToGenerate[index][0] = detailLevel + 1;
-				farPosToGenerate[index][1] = posX;
-				farPosToGenerate[index][2] = posZ;
-				farPosToGenerate[index][3] = distance;
-			}
-		}
-		else
-		{
-			//We are introducing a position in the near array
-			
-			if (nearSize < nearPosToGenerate.length)
-				nearSize++;
-			
-			index = nearSize - 1;
-			while (index > 0 && LevelPosUtil.compareDistance(distance, nearPosToGenerate[index - 1][3]) <= 0)
+			index--;
+		} else nearSize++;
+		
+		if (sort) {
+			while (index > 0 && Integer.compare(distance, nearPosToGenerate[index - 1][3]) <= 0)
 			{
 				nearPosToGenerate[index][0] = nearPosToGenerate[index - 1][0];
 				nearPosToGenerate[index][1] = nearPosToGenerate[index - 1][1];
@@ -103,16 +76,48 @@ public class PosToGenerateContainer
 				nearPosToGenerate[index][3] = nearPosToGenerate[index - 1][3];
 				index--;
 			}
-			
-			
-			if (index != nearSize - 1 || nearSize != nearPosToGenerate.length)
+		}
+		nearPosToGenerate[index][0] = detailLevel + 1;
+		nearPosToGenerate[index][1] = posX;
+		nearPosToGenerate[index][2] = posZ;
+		nearPosToGenerate[index][3] = distance;
+	}
+
+	// TODO what is going on in this method?
+	public void addFarPosToGenerate(byte detailLevel, int posX, int posZ, boolean sort)
+	{
+		// FIXME: This is a cast from double to int!!! OVERFLOW MAY HAPPEN!
+		int distance = (int)LevelPosUtil.minDistance(detailLevel, posX, posZ, playerPosX, playerPosZ);
+		int index;
+	
+		// We are introducing a position in the far array
+		
+		index = farSize;
+		if (index == farPosToGenerate.length) {
+			if (Integer.compare(distance, farPosToGenerate[index - 1][3]) > 0) {
+				return;
+			}
+			index--;
+		} else farSize++;
+		
+		if (sort) {
+			while (index > 0 && Integer.compare(distance, farPosToGenerate[index - 1][3]) <= 0)
 			{
-				nearPosToGenerate[index][0] = detailLevel + 1;
-				nearPosToGenerate[index][1] = posX;
-				nearPosToGenerate[index][2] = posZ;
-				nearPosToGenerate[index][3] = distance;
+				farPosToGenerate[index][0] = farPosToGenerate[index - 1][0];
+				farPosToGenerate[index][1] = farPosToGenerate[index - 1][1];
+				farPosToGenerate[index][2] = farPosToGenerate[index - 1][2];
+				farPosToGenerate[index][3] = farPosToGenerate[index - 1][3];
+				index--;
 			}
 		}
+		farPosToGenerate[index][0] = detailLevel + 1;
+		farPosToGenerate[index][1] = posX;
+		farPosToGenerate[index][2] = posZ;
+		farPosToGenerate[index][3] = distance;
+	}
+	
+	public boolean isFull() {
+		return nearSize == nearPosToGenerate.length && farSize == farPosToGenerate.length;
 	}
 	
 	
@@ -132,6 +137,16 @@ public class PosToGenerateContainer
 		return farSize;
 	}
 	
+	public int getMaxNumberOfNearPos()
+	{
+		return nearPosToGenerate.length;
+	}
+	
+	public int getMaxNumberOfFarPos()
+	{
+		return farPosToGenerate.length;
+	}
+	
 	// TODO what does getNth mean? could the name be more descriptive or is it just a index?
 	public int getNthDetail(int n, boolean near)
 	{

src/main/java/com/seibel/lod/core/objects/PosToRenderContainer.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -21,7 +21,7 @@ package com.seibel.lod.core.objects;
 
 import java.util.Arrays;
 
-import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.api.ApiShared;
 import com.seibel.lod.core.util.LevelPosUtil;
 import com.seibel.lod.core.util.LodUtil;
 
@@ -60,7 +60,7 @@ public class PosToRenderContainer
 		{
 			// This is might be due to dimensions having a different width
 			// when first loading in
-			ClientApi.LOGGER.error("Unable to addPosToRender. numberOfPosToRender [" + numberOfPosToRender + "] detailLevel [" + detailLevel + "] Pos [" + posX + "," + posZ + "]");
+			ApiShared.LOGGER.error("Unable to addPosToRender. numberOfPosToRender [" + numberOfPosToRender + "] detailLevel [" + detailLevel + "] Pos [" + posX + "," + posZ + "]");
 			numberOfPosToRender++; // incrementing so we can see how many pos over the limit we would go
 			return;
 		}

src/main/java/com/seibel/lod/core/objects/VertexOptimizer.java

@@ -1,590 +0,0 @@
-/*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
- *    licensed under the GNU GPL v3 License.
- *
- *    Copyright (C) 2020  James Seibel
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU General Public License as published by
- *    the Free Software Foundation, version 3.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU General Public License for more details.
- *
- *    You should have received a copy of the GNU General Public License
- *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.seibel.lod.core.objects;
-
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Map;
-
-import com.seibel.lod.core.enums.LodDirection;
-import com.seibel.lod.core.enums.rendering.DebugMode;
-import com.seibel.lod.core.objects.math.Vec3i;
-import com.seibel.lod.core.util.ColorUtil;
-import com.seibel.lod.core.util.DataPointUtil;
-import com.seibel.lod.core.util.LodUtil;
-import com.seibel.lod.core.util.SingletonHandler;
-import com.seibel.lod.core.wrapperInterfaces.block.AbstractBlockPosWrapper;
-import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
-import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
-
-/**
- * This class handles all the vertex optimization that's needed for a column of lods. W
- * @author Leonardo Amato
- * @version 10-2-2021
- */
-public class VertexOptimizer
-{
-	private static final IMinecraftWrapper MC = SingletonHandler.get(IMinecraftWrapper.class);
-	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
-	
-	public static final int ADJACENT_HEIGHT_INDEX = 0;
-	public static final int ADJACENT_DEPTH_INDEX = 1;
-	
-	public static final int X = 0;
-	public static final int Y = 1;
-	public static final int Z = 2;
-	
-	public static final int MIN = 0;
-	public static final int MAX = 1;
-	
-	public static final int VOID_FACE = 0;
-	
-	/** The six cardinal directions */
-	public static final LodDirection[] DIRECTIONS = new LodDirection[] {
-			LodDirection.UP,
-			LodDirection.DOWN,
-			LodDirection.WEST,
-			LodDirection.EAST,
-			LodDirection.NORTH,
-			LodDirection.SOUTH };
-	
-	/** North, South, East, West */
-	public static final LodDirection[] ADJ_DIRECTIONS = new LodDirection[] {
-			LodDirection.EAST,
-			LodDirection.WEST,
-			LodDirection.SOUTH,
-			LodDirection.NORTH };
-	
-	/** All the faces and vertices of a cube. This is used to extract the vertex from the column */
-	@SuppressWarnings("serial")
-	public static final Map<LodDirection, int[][]> DIRECTION_VERTEX_MAP = new HashMap<LodDirection, int[][]>()
-	{{
-		put(LodDirection.UP, new int[][] {
-				{ 0, 1, 0 }, // 0
-				{ 0, 1, 1 }, // 1
-				{ 1, 1, 1 }, // 2
-				
-				{ 0, 1, 0 }, // 0
-				{ 1, 1, 1 }, // 2
-				{ 1, 1, 0 } // 3
-		});
-		put(LodDirection.DOWN, new int[][] {
-				{ 1, 0, 0 }, // 0
-				{ 1, 0, 1 }, // 1
-				{ 0, 0, 1 }, // 2
-				
-				{ 1, 0, 0 }, // 0
-				{ 0, 0, 1 }, // 2
-				{ 0, 0, 0 } // 3
-		 });
-		put(LodDirection.EAST, new int[][] {
-				{ 1, 1, 0 }, // 0
-				{ 1, 1, 1 }, // 1
-				{ 1, 0, 1 }, // 2
-				
-				{ 1, 1, 0 }, // 0
-				{ 1, 0, 1 }, // 2
-				{ 1, 0, 0 } }); // 3
-		put(LodDirection.WEST, new int[][] {
-				{ 0, 0, 0 }, // 0
-				{ 0, 0, 1 }, // 1
-				{ 0, 1, 1 }, // 2
-				
-				{ 0, 0, 0 }, // 0
-				{ 0, 1, 1 }, // 2
-				{ 0, 1, 0 } // 3
-		});
-		put(LodDirection.SOUTH, new int[][] {
-				{ 1, 0, 1 }, // 0
-				{ 1, 1, 1 }, // 1
-				{ 0, 1, 1 }, // 2
-				
-				{ 1, 0, 1 }, // 0
-				{ 0, 1, 1 }, // 2
-				{ 0, 0, 1 } // 3
-		});
-		put(LodDirection.NORTH, new int[][] {
-				{ 0, 0, 0 }, // 0
-				{ 0, 1, 0 }, // 1
-				{ 1, 1, 0 }, // 2
-				
-				{ 0, 0, 0 }, // 0
-				{ 1, 1, 0 }, // 2
-				{ 1, 0, 0 } // 3
-		});
-	}};
-	
-	
-	/**
-	 * This indicates which position is invariable in the DIRECTION_VERTEX_MAP.
-	 * Is used to extract the vertex
-	 */
-	@SuppressWarnings("serial")
-	public static final Map<LodDirection, int[]> FACE_DIRECTION = new HashMap<LodDirection, int[]>()
-	{{
-		put(LodDirection.UP, new int[] { Y, MAX });
-		put(LodDirection.DOWN, new int[] { Y, MIN });
-		put(LodDirection.EAST, new int[] { X, MAX });
-		put(LodDirection.WEST, new int[] { X, MIN });
-		put(LodDirection.SOUTH, new int[] { Z, MAX });
-		put(LodDirection.NORTH, new int[] { Z, MIN });
-	}};
-	
-	
-	/**
-	 * This is a map from Direction to the relative normal vector
-	 * we are using this since I'm not sure if the getNormal create new object at every call
-	 */
-	@SuppressWarnings("serial")
-	public static final Map<LodDirection, Vec3i> DIRECTION_NORMAL_MAP = new HashMap<LodDirection, Vec3i>()
-	{{
-		put(LodDirection.UP, LodDirection.UP.getNormal());
-		put(LodDirection.DOWN, LodDirection.DOWN.getNormal());
-		put(LodDirection.EAST, LodDirection.EAST.getNormal());
-		put(LodDirection.WEST, LodDirection.WEST.getNormal());
-		put(LodDirection.SOUTH, LodDirection.SOUTH.getNormal());
-		put(LodDirection.NORTH, LodDirection.NORTH.getNormal());
-	}};
-	
-	/** We use this index for all array that are going to */
-	@SuppressWarnings("serial")
-	public static final Map<LodDirection, Integer> DIRECTION_INDEX = new HashMap<LodDirection, Integer>()
-	{{
-		put(LodDirection.UP, 0);
-		put(LodDirection.DOWN, 1);
-		put(LodDirection.EAST, 2);
-		put(LodDirection.WEST, 3);
-		put(LodDirection.SOUTH, 4);
-		put(LodDirection.NORTH, 5);
-	}};
-	
-	@SuppressWarnings("serial")
-	public static final Map<LodDirection, Integer> ADJ_DIRECTION_INDEX = new HashMap<LodDirection, Integer>()
-	{{
-		put(LodDirection.EAST, 0);
-		put(LodDirection.WEST, 1);
-		put(LodDirection.SOUTH, 2);
-		put(LodDirection.NORTH, 3);
-	}};
-	/** holds the box's x, y, z offset */
-	public final int[] boxOffset;
-	/** holds the box's x, y, z width */
-	public final int[] boxWidth;
-	
-	/** Holds each direction's color */
-	public final int[] colorMap;
-	/** The original color (before shading) of this box */
-	public int color;
-	/**
-	 *
-	 */
-	public final Map<LodDirection, int[]> adjHeight;
-	public final Map<LodDirection, int[]> adjDepth;
-	public final Map<LodDirection, byte[]> skyLights;
-	public byte blockLight;
-	
-	boolean skipTop;
-	boolean skipBot;
-	
-	
-	
-	/** creates an empty box */
-	@SuppressWarnings("serial")
-	public VertexOptimizer()
-	{
-		boxOffset = new int[3];
-		boxWidth = new int[3];
-		
-		colorMap = new int[6];
-		skyLights = new HashMap<LodDirection, byte[]>()
-		{{
-			put(LodDirection.UP, new byte[1]);
-			put(LodDirection.DOWN, new byte[1]);
-			put(LodDirection.EAST, new byte[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.WEST, new byte[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.SOUTH, new byte[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.NORTH, new byte[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-		}};
-		adjHeight = new HashMap<LodDirection, int[]>()
-		{{
-			put(LodDirection.EAST, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.WEST, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.SOUTH, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.NORTH, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-		}};
-		adjDepth = new HashMap<LodDirection, int[]>()
-		{{
-			put(LodDirection.EAST, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.WEST, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.SOUTH, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-			put(LodDirection.NORTH, new int[LodUtil.MAX_NUMBER_OF_VERTICAL_LODS]);
-		}};
-	}
-	
-	/** Set the light of the columns */
-	public void setLights(int skyLight, int blockLight)
-	{
-		this.blockLight = (byte) blockLight;
-		skyLights.get(LodDirection.UP)[0] = (byte) skyLight;
-	}
-	
-	/**
-	 * Set the color of the columns
-	 * @param color color to add
-	 * @param adjShadeDisabled this array indicates which face does not need shading
-	 */
-	public void setColor(int color, boolean[] adjShadeDisabled)
-	{
-		this.color = color;
-		for (LodDirection lodDirection : DIRECTIONS)
-		{
-			if (!adjShadeDisabled[DIRECTION_INDEX.get(lodDirection)])
-				colorMap[DIRECTION_INDEX.get(lodDirection)] = ColorUtil.applyShade(color, MC.getShade(lodDirection));
-			else
-				colorMap[DIRECTION_INDEX.get(lodDirection)] = color;
-		}
-	}
-	
-	/**
-	 * @param lodDirection of the face of which we want to get the color
-	 * @return color of the face
-	 */
-	public int getColor(LodDirection lodDirection)
-	{
-		if (CONFIG.client().advanced().debugging().getDebugMode() != DebugMode.SHOW_DETAIL)
-			return colorMap[DIRECTION_INDEX.get(lodDirection)];
-		else
-			return ColorUtil.applyShade(color, MC.getShade(lodDirection));
-	}
-	
-	/**
-	 */
-	public byte getSkyLight(LodDirection lodDirection, int verticalIndex)
-	{
-		if(lodDirection == LodDirection.UP || lodDirection == LodDirection.DOWN)
-			return skyLights.get(lodDirection)[0];
-		else
-			return skyLights.get(lodDirection)[verticalIndex];
-	}
-	
-	/**
-	 */
-	public int getBlockLight()
-	{
-		return blockLight;
-	}
-	/** clears this box, resetting everything to default values */
-	public void reset()
-	{
-		Arrays.fill(boxWidth, 0);
-		Arrays.fill(boxOffset, 0);
-		Arrays.fill(colorMap, 0);
-		blockLight = 0;
-		for (LodDirection lodDirection : ADJ_DIRECTIONS)
-		{
-			for (int i = 0; i < adjHeight.get(lodDirection).length; i++)
-			{
-				adjHeight.get(lodDirection)[i] = VOID_FACE;
-				adjDepth.get(lodDirection)[i] = VOID_FACE;
-				skyLights.get(lodDirection)[i] = 0;
-			}
-		}
-	}
-	
-	/**
-	 * This method create all the shared face culling based on the adjacent data
-	 * @param adjData data adjacent to the column we are going to render
-	 */
-	public void setAdjData(Map<LodDirection, long[]> adjData)
-	{
-		int height;
-		int depth;
-		int minY = getMinY();
-		int maxY = getMaxY();
-		long singleAdjDataPoint;
-		
-		// TODO transparency uncomment final condition to see ocean floor
-		//Up direction case
-		singleAdjDataPoint = adjData.get(LodDirection.UP)[0];
-		skipTop = DataPointUtil.doesItExist(singleAdjDataPoint) && DataPointUtil.getDepth(singleAdjDataPoint) == maxY;// && DataPointUtil.getAlpha(singleAdjDataPoint) == 255;
-		//Down direction case
-		singleAdjDataPoint = adjData.get(LodDirection.DOWN)[0];
-		skipBot = DataPointUtil.doesItExist(singleAdjDataPoint) && DataPointUtil.getHeight(singleAdjDataPoint) == minY;// && DataPointUtil.getAlpha(singleAdjDataPoint) == 255;
-		if(DataPointUtil.doesItExist(singleAdjDataPoint))
-			skyLights.get(LodDirection.DOWN)[0] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint);
-		else
-			skyLights.get(LodDirection.DOWN)[0] = skyLights.get(LodDirection.UP)[0];
-		//other sided
-		//TODO clean some similar cases
-		for (LodDirection lodDirection : ADJ_DIRECTIONS)
-		{
-			long[] dataPoint = adjData.get(lodDirection);
-			if (dataPoint == null || DataPointUtil.isVoid(dataPoint[0]))
-			{
-				adjHeight.get(lodDirection)[0] = maxY;
-				adjDepth.get(lodDirection)[0] = minY;
-				adjHeight.get(lodDirection)[1] = VOID_FACE;
-				adjDepth.get(lodDirection)[1] = VOID_FACE;
-				skyLights.get(lodDirection)[0] = 15; //in void set full skylight
-				continue;
-			}
-			
-			int i;
-			int faceToDraw = 0;
-			boolean firstFace = true;
-			boolean toFinish = false;
-			int toFinishIndex = 0;
-			boolean allAbove = true;
-			// TODO transparency ocean floor fix
-			//boolean isOpaque = ((colorMap[0] >> 24) & 0xFF) == 255;
-			for (i = 0; i < dataPoint.length; i++)
-			{
-				singleAdjDataPoint = dataPoint[i];
-				if (DataPointUtil.isVoid(singleAdjDataPoint) || !DataPointUtil.doesItExist(singleAdjDataPoint))
-					break;
-				
-				// TODO transparency ocean floor fix
-				//if (isOpaque && DataPointUtil.getAlpha(singleAdjDataPoint) != 255)
-				//	continue;
-				
-				height = DataPointUtil.getHeight(singleAdjDataPoint);
-				depth = DataPointUtil.getDepth(singleAdjDataPoint);
-				
-				if (depth < maxY)
-				{
-					allAbove = false;
-					if (height < minY)
-					{
-						// the adj data is lower than the current data
-						
-						if (firstFace)
-						{
-							adjHeight.get(lodDirection)[0] = getMaxY();
-							adjDepth.get(lodDirection)[0] = getMinY();
-							skyLights.get(lodDirection)[0] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint); //skyLights.get(Direction.UP)[0];
-						}
-						else
-						{
-							adjDepth.get(lodDirection)[faceToDraw] = getMinY();
-							skyLights.get(lodDirection)[faceToDraw] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint);
-						}
-						faceToDraw++;
-						toFinish = false;
-						
-						// break since all the other data will be lower
-						break;
-					}
-					else if (depth <= minY)
-					{
-						if (height >= maxY)
-						{
-							// the adj data is inside the current data
-							// don't draw the face
-							adjHeight.get(lodDirection)[0] = VOID_FACE;
-							adjDepth.get(lodDirection)[0] = VOID_FACE;
-						}
-						else // height < maxY
-						{
-							// the adj data intersects the lower part of the current data
-							// if this is the only face, use the maxY and break,
-							// if there was another face we finish the last one and break
-							if (firstFace)
-							{
-								adjHeight.get(lodDirection)[0] = getMaxY();
-								adjDepth.get(lodDirection)[0] = height;
-								skyLights.get(lodDirection)[0] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint); //skyLights.get(Direction.UP)[0];
-							}
-							else
-							{
-								adjDepth.get(lodDirection)[faceToDraw] = height;
-								skyLights.get(lodDirection)[faceToDraw] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint);
-							}
-							toFinish = false;
-							faceToDraw++;
-						}
-						break;
-					}
-					else if (height >= maxY)// && depth > minY
-					{
-						// the adj data intersects the higher part of the current data
-						// we start the creation of a new face
-						adjHeight.get(lodDirection)[faceToDraw] = depth;
-						//skyLights.get(direction)[faceToDraw] = (byte) DataPointUtil.getLightSkyAlt(singleAdjDataPoint);
-						firstFace = false;
-						toFinish = true;
-						toFinishIndex = i + 1;
-					}
-					else
-					{
-						// if (depth > minY && height < maxY)
-						
-						// the adj data is contained in the current data
-						if (firstFace)
-						{
-							adjHeight.get(lodDirection)[0] = getMaxY();
-						}
-						
-						adjDepth.get(lodDirection)[faceToDraw] = height;
-						skyLights.get(lodDirection)[faceToDraw] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint);
-						faceToDraw++;
-						adjHeight.get(lodDirection)[faceToDraw] = depth;
-						firstFace = false;
-						toFinish = true;
-						toFinishIndex = i + 1;
-					}
-				}
-			}
-			
-			if (allAbove)
-			{
-				adjHeight.get(lodDirection)[0] = getMaxY();
-				adjDepth.get(lodDirection)[0] = getMinY();
-				skyLights.get(lodDirection)[0] = skyLights.get(LodDirection.UP)[0];
-				faceToDraw++;
-			}
-			else if (toFinish)
-			{
-				adjDepth.get(lodDirection)[faceToDraw] = minY;
-				if(toFinishIndex < dataPoint.length)
-				{
-					singleAdjDataPoint = dataPoint[toFinishIndex];
-					if (DataPointUtil.doesItExist(singleAdjDataPoint))
-						skyLights.get(lodDirection)[faceToDraw] = DataPointUtil.getLightSkyAlt(singleAdjDataPoint);
-					else
-						skyLights.get(lodDirection)[faceToDraw] = skyLights.get(LodDirection.UP)[0];
-				}
-				faceToDraw++;
-			}
-			
-			adjHeight.get(lodDirection)[faceToDraw] = VOID_FACE;
-			adjDepth.get(lodDirection)[faceToDraw] = VOID_FACE;
-		}
-	}
-	
-	/** We use this method to set the various width of the column */
-	public void setWidth(int xWidth, int yWidth, int zWidth)
-	{
-		boxWidth[X] = xWidth;
-		boxWidth[Y] = yWidth;
-		boxWidth[Z] = zWidth;
-	}
-	
-	/** We use this method to set the various offset of the column */
-	public void setOffset(int xOffset, int yOffset, int zOffset)
-	{
-		boxOffset[X] = xOffset;
-		boxOffset[Y] = yOffset;
-		boxOffset[Z] = zOffset;
-	}
-	
-	/** returns true if the given direction should be rendered. */
-	public boolean shouldRenderFace(LodDirection lodDirection, int adjIndex)
-	{
-		if (lodDirection == LodDirection.UP)
-			return adjIndex == 0 && !skipTop;
-		if (lodDirection == LodDirection.DOWN)
-			return adjIndex == 0 && !skipBot;
-		
-		return !(adjHeight.get(lodDirection)[adjIndex] == VOID_FACE && adjDepth.get(lodDirection)[adjIndex] == VOID_FACE);
-	}
-	
-	
-	/**
-	 * @param lodDirection direction of the face we want to render
-	 * @param vertexIndex index of the vertex of the face (0-1-2-3)
-	 * @return position x of the relative vertex
-	 */
-	public int getX(LodDirection lodDirection, int vertexIndex)
-	{
-		return boxOffset[X] + boxWidth[X] * DIRECTION_VERTEX_MAP.get(lodDirection)[vertexIndex][X];
-	}
-	
-	/**
-	 * @param lodDirection direction of the face we want to render
-	 * @param vertexIndex index of the vertex of the face (0-1-2-3)
-	 * @return position y of the relative vertex
-	 */
-	public int getY(LodDirection lodDirection, int vertexIndex)
-	{
-		return boxOffset[Y] + boxWidth[Y] * DIRECTION_VERTEX_MAP.get(lodDirection)[vertexIndex][Y];
-	}
-	
-	/**
-	 * @param lodDirection direction of the face we want to render
-	 * @param vertexIndex index of the vertex of the face (0-1-2-3)
-	 * @param adjIndex, index of the n-th culled face of this direction
-	 * @return position x of the relative vertex
-	 */
-	public int getY(LodDirection lodDirection, int vertexIndex, int adjIndex)
-	{
-		if (lodDirection == LodDirection.DOWN || lodDirection == LodDirection.UP)
-			return boxOffset[Y] + boxWidth[Y] * DIRECTION_VERTEX_MAP.get(lodDirection)[vertexIndex][Y];
-		else
-		{
-			// this could probably be cleaned up more,
-			// but it still works
-			if (1 - DIRECTION_VERTEX_MAP.get(lodDirection)[vertexIndex][Y] == ADJACENT_HEIGHT_INDEX)
-				return adjHeight.get(lodDirection)[adjIndex];
-			else
-				return adjDepth.get(lodDirection)[adjIndex];
-		}
-	}
-	
-	/**
-	 * @param lodDirection direction of the face we want to render
-	 * @param vertexIndex index of the vertex of the face (0-1-2-3)
-	 * @return position z of the relative vertex
-	 */
-	public int getZ(LodDirection lodDirection, int vertexIndex)
-	{
-		return boxOffset[Z] + boxWidth[Z] * DIRECTION_VERTEX_MAP.get(lodDirection)[vertexIndex][Z];
-	}
-	
-	public int getMinX()
-	{
-		return boxOffset[X];
-	}
-	
-	public int getMaxX()
-	{
-		return boxOffset[X] + boxWidth[X];
-	}
-	
-	public int getMinY()
-	{
-		return boxOffset[Y];
-	}
-	
-	public int getMaxY()
-	{
-		return boxOffset[Y] + boxWidth[Y];
-	}
-	
-	public int getMinZ()
-	{
-		return boxOffset[Z];
-	}
-	
-	public int getMaxZ()
-	{
-		return boxOffset[Z] + boxWidth[Z];
-	}
-	
-}

src/main/java/com/seibel/lod/core/objects/lod/LevelContainer.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -21,7 +21,6 @@ package com.seibel.lod.core.objects.lod;
 
 import java.io.DataOutputStream;
 import java.io.IOException;
-import java.io.OutputStream;
 
 /**
  * A level container is a quad tree level
@@ -43,9 +42,15 @@ public interface LevelContainer
 	 * @param data actual data to add in an array of long[] format.
 	 * @param posX x position in the detail level
 	 * @param posZ z position in the detail level
-	 * @return true if correctly added, false otherwise
+	 * @return true if correctly changed, false otherwise
 	 */
-	boolean addVerticalData(long[] data, int posX, int posZ);
+	boolean addVerticalData(long[] data, int posX, int posZ, boolean override);
+	
+	/**
+	 * With this you can add a square of data to the level container
+	 * @return true if anything changed, false otherwise
+	 */
+	boolean addChunkOfData(long[] data, int posX, int posZ, int widthX, int widthZ, boolean override);
 	
 	/**
 	 * With this you can add data to the level container
@@ -63,6 +68,14 @@ public interface LevelContainer
 	 * @return the data in long array format
 	 */
 	long getData(int posX, int posZ, int index);
+
+	/**
+	 * With this you can get data from the level container
+	 * @param posX x position in the detail level
+	 * @param posZ z position in the detail level
+	 * @return the data in long array format
+	 */
+	long[] getAllData(int posX, int posZ);
 	
 	/**
 	 * With this you can get data from the level container
@@ -116,4 +129,11 @@ public interface LevelContainer
 	 * @return data as a String
 	 */
 	int getMaxNumberOfLods();
+
+	/**
+	 * This will return a ram usage estimation of this object
+	 * @return long as byte
+	 */
+	long getRoughRamUsage();
+
 }

src/main/java/com/seibel/lod/core/objects/lod/LodWorld.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -22,15 +22,14 @@ package com.seibel.lod.core.objects.lod;
 import java.util.Hashtable;
 import java.util.Map;
 
-import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.api.ApiShared;
 import com.seibel.lod.core.wrapperInterfaces.world.IDimensionTypeWrapper;
 
 /**
  * This stores all LODs for a given world.
- * 
  * @author James Seibel
  * @author Leonardo Amato
- * @version 9-27-2021
+ * @version 2022-3-29
  */
 public class LodWorld
 {
@@ -44,7 +43,7 @@ public class LodWorld
 	private boolean isWorldLoaded = false;
 	
 	/** the name given to the world if it isn't loaded */
-	public static final String NO_WORLD_LOADED = "No world loaded";
+	public static final String NO_WORLD_LOADED = "";
 	
 	
 	
@@ -65,25 +64,20 @@ public class LodWorld
 	 */
 	public void selectWorld(String newWorldName)
 	{
-		if (newWorldName.isEmpty())
-		{
-			deselectWorld();
-			return;
-		}
-		
+		ApiShared.LOGGER.info("Selecting world {} while in world {}", newWorldName, worldName);
 		if (worldName.equals(newWorldName))
 			// don't recreate everything if we
 			// didn't actually change worlds
 			return;
 		
+		deselectWorld();
 		worldName = newWorldName;
 		lodDimensions = new Hashtable<>();
 		isWorldLoaded = true;
 	}
 	
 	/**
-	 * Set the worldName to "No world loaded"
-	 * and clear the lodDimensions Map. <br>
+	 * Clear the lodDimensions Map. <br>
 	 * This should be done whenever unloaded a world. <br><br>
 	 * <p>
 	 * Note a System.gc() call may be in order after calling this <Br>
@@ -91,7 +85,9 @@ public class LodWorld
 	 */
 	public void deselectWorld()
 	{
+		ApiShared.LOGGER.info("Deselecting world {}", worldName);
 		worldName = NO_WORLD_LOADED;
+		saveAllDimensions(true); // Make sure all dims are saved. This will block threads
 		lodDimensions = null;
 		isWorldLoaded = false;
 	}
@@ -105,8 +101,11 @@ public class LodWorld
 	{
 		if (lodDimensions == null)
 			return;
+		ApiShared.LOGGER.info("Adding dim {} to world {}", newDimension, worldName);
 		
-		lodDimensions.put(newDimension.dimension, newDimension);
+		LodDimension oldDim = lodDimensions.put(newDimension.dimension, newDimension);
+		if (oldDim != null)
+			oldDim.saveDirtyRegionsToFile(true);
 	}
 	
 	/**
@@ -129,7 +128,7 @@ public class LodWorld
 		if (lodDimensions == null)
 			return;
 		
-		saveAllDimensions();
+		saveAllDimensions(true); //block until saving is done
 		
 		for (IDimensionTypeWrapper key : lodDimensions.keySet())
 			lodDimensions.get(key).setRegionWidth(newRegionWidth);
@@ -138,17 +137,35 @@ public class LodWorld
 	/**
 	 * Requests all dimensions save any dirty regions they may have.
 	 */
-	public void saveAllDimensions()
+	public void saveAllDimensions(boolean isBlocking)
 	{
 		if (lodDimensions == null)
 			return;
 		
 		// TODO we should only print this if lods were actually saved to file
 		// but that requires a LodDimension.hasDirtyRegions() method or something similar
-		ClientApi.LOGGER.info("Saving LODs");
+		ApiShared.LOGGER.info("Saving LODs");
 		
 		for (IDimensionTypeWrapper key : lodDimensions.keySet())
-			lodDimensions.get(key).saveDirtyRegionsToFileAsync();
+		{
+			lodDimensions.get(key).saveDirtyRegionsToFile(isBlocking);
+		}
+		//FIXME: This should block until file is saved.
+	}
+	
+	/**
+	 * Requests all dimensions to shutdown
+	 */
+	public void shutdownAllDimensions()
+	{
+		if (lodDimensions == null)
+			return;
+		
+		// TODO: Add parallel shutdowns.
+		for (IDimensionTypeWrapper key : lodDimensions.keySet())
+		{
+			lodDimensions.get(key).shutdown();
+		}
 	}
 	
 	

src/main/java/com/seibel/lod/core/objects/lod/RegionPos.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,8 +19,8 @@
 
 package com.seibel.lod.core.objects.lod;
 
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
 import com.seibel.lod.core.util.LodUtil;
-import com.seibel.lod.core.util.SingletonHandler;
 import com.seibel.lod.core.wrapperInterfaces.IWrapperFactory;
 import com.seibel.lod.core.wrapperInterfaces.block.AbstractBlockPosWrapper;
 import com.seibel.lod.core.wrapperInterfaces.chunk.AbstractChunkPosWrapper;
@@ -82,10 +82,39 @@ public class RegionPos
 				.offset(LodUtil.CHUNK_WIDTH / 2, 0, LodUtil.CHUNK_WIDTH / 2);
 	}
 	
+	@Override
+	public boolean equals(Object o) {
+		// If the object is compared with itself then return true 
+        if (o == this) {
+            return true;
+        }
+        // Check if o is an instance of RegionPos or not
+        if (!(o instanceof RegionPos)) {
+            return false;
+        }
+        RegionPos c = (RegionPos) o;
+        return c.x==x &&c.z==z;
+	}
+	
 	
 	@Override
 	public String toString()
 	{
 		return "(" + x + "," + z + ")";
 	}
+	
+    public static long asLong(int i, int j) {
+        return (long)i & 0xFFFFFFFFL | ((long)j & 0xFFFFFFFFL) << 32;
+    }
+    public static int getX(long l) {
+        return (int)(l & 0xFFFFFFFFL);
+    }
+    public static int getZ(long l) {
+        return (int)(l >>> 32 & 0xFFFFFFFFL);
+    }
+    
+	@Override
+	public int hashCode() {
+		return Long.hashCode(asLong(x,z));
+	}
 }

src/main/java/com/seibel/lod/core/objects/math/Mat4f.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -397,6 +397,7 @@ public class Mat4f
 	/** 
 	 * TODO: what kind of translation is this? 
 	 * and how is this different from "multiplyTranslationMatrix"?
+	 * Answer: This is faster and direct (but only if this is pure translation matrix without rotate)
 	 */
 	public void translate(Vec3f vec)
 	{

src/main/java/com/seibel/lod/core/objects/math/Vec3d.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/objects/math/Vec3f.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/objects/math/Vec3i.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/objects/opengl/DefaultLodVertexFormats.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -30,14 +30,14 @@ import com.google.common.collect.ImmutableList;
  */
 public class DefaultLodVertexFormats
 {
-	public static final LodVertexFormatElement ELEMENT_POSITION = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.FLOAT, 3);
-	public static final LodVertexFormatElement ELEMENT_COLOR = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.UBYTE, 4);
-	public static final LodVertexFormatElement ELEMENT_UV = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.FLOAT, 2);
-	public static final LodVertexFormatElement ELEMENT_LIGHT_MAP_UV = new LodVertexFormatElement(1, LodVertexFormatElement.DataType.SHORT, 2);
-	public static final LodVertexFormatElement ELEMENT_NORMAL = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.BYTE, 3);
-	public static final LodVertexFormatElement ELEMENT_PADDING = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.BYTE, 1);
+	public static final LodVertexFormatElement ELEMENT_POSITION = new LodVertexFormatElement(3, LodVertexFormatElement.DataType.USHORT, 3, false);
+	public static final LodVertexFormatElement ELEMENT_COLOR = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.UBYTE, 4, false);
+	public static final LodVertexFormatElement ELEMENT_UV = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.FLOAT, 2, false);
+	public static final LodVertexFormatElement ELEMENT_LIGHT_MAP_UV = new LodVertexFormatElement(1, LodVertexFormatElement.DataType.SHORT, 2, false);
+	public static final LodVertexFormatElement ELEMENT_NORMAL = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.BYTE, 3, false);
+	public static final LodVertexFormatElement ELEMENT_PADDING = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.BYTE, 1, true);
 	
-	public static final LodVertexFormatElement ELEMENT_BLOCK_LIGHT = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.UBYTE, 1);
+	public static final LodVertexFormatElement ELEMENT_LIGHT = new LodVertexFormatElement(0, LodVertexFormatElement.DataType.UBYTE, 1, false);
 	
 	
 	public static final LodVertexFormat POSITION = 						new LodVertexFormat(ImmutableList.<LodVertexFormatElement>builder().add(ELEMENT_POSITION).build());
@@ -47,5 +47,7 @@ public class DefaultLodVertexFormats
 	public static final LodVertexFormat POSITION_COLOR_TEX = 			new LodVertexFormat(ImmutableList.<LodVertexFormatElement>builder().add(ELEMENT_POSITION).add(ELEMENT_COLOR).add(ELEMENT_UV).build());
 	public static final LodVertexFormat POSITION_COLOR_TEX_LIGHTMAP = 	new LodVertexFormat(ImmutableList.<LodVertexFormatElement>builder().add(ELEMENT_POSITION).add(ELEMENT_COLOR).add(ELEMENT_UV).add(ELEMENT_LIGHT_MAP_UV).build());
 	
-	public static final LodVertexFormat POSITION_COLOR_BLOCK_LIGHT_SKY_LIGHT =	new LodVertexFormat(ImmutableList.<LodVertexFormatElement>builder().add(ELEMENT_POSITION).add(ELEMENT_COLOR).add(ELEMENT_BLOCK_LIGHT).add(ELEMENT_BLOCK_LIGHT).build());	
+	public static final LodVertexFormat POSITION_COLOR_BLOCK_LIGHT_SKY_LIGHT =	new LodVertexFormat(ImmutableList.<LodVertexFormatElement>builder()
+			.add(ELEMENT_POSITION).add(ELEMENT_PADDING).add(ELEMENT_LIGHT)
+			.add(ELEMENT_COLOR).build());	
 }

src/main/java/com/seibel/lod/core/objects/opengl/LodBox.java

@@ -0,0 +1,309 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.seibel.lod.core.objects.opengl;
+
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodQuadBuilder;
+import com.seibel.lod.core.enums.LodDirection;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.util.ColorUtil;
+import com.seibel.lod.core.util.DataPointUtil;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
+
+public class LodBox
+{
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
+	
+	public static void addBoxQuadsToBuilder(LodQuadBuilder builder, short xSize, short ySize, short zSize, short x,
+			short y, short z, int color, byte skyLight, byte blockLight, long topData, long botData, long[][][] adjData,
+			boolean[] adjFillBlack)
+	{
+		short maxX = (short) (x + xSize);
+		short maxY = (short) (y + ySize);
+		short maxZ = (short) (z + zSize);
+		byte skyLightTop = skyLight;
+		byte skyLightBot = DataPointUtil.doesItExist(botData) ? DataPointUtil.getLightSky(botData) : 0;
+		
+		// Up direction case
+		boolean skipTop = DataPointUtil.doesItExist(topData) && DataPointUtil.getDepth(topData) == maxY;// &&
+		// DataPointUtil.getAlpha(singleAdjDataPoint)
+		// == 255;
+		boolean skipBot = DataPointUtil.doesItExist(botData) && DataPointUtil.getHeight(botData) == y;// &&
+		// DataPointUtil.getAlpha(singleAdjDataPoint)
+		// == 255;
+		
+		if (!skipTop)
+			builder.addQuadUp(x, maxY, z, xSize, zSize, ColorUtil.applyShade(color, MC.getShade(LodDirection.UP)), skyLightTop, blockLight);
+		if (!skipBot)
+			builder.addQuadDown(x, y, z, xSize, zSize, ColorUtil.applyShade(color, MC.getShade(LodDirection.DOWN)), skyLightBot, blockLight);
+		
+		//If the adj pos is at the same level we cull the faces normally, otherwise we divide the face in two and cull the two part separately
+		
+		//NORTH face vertex creation
+		{
+			long[][] adjDataNorth = adjData[LodDirection.NORTH.ordinal() - 2];
+			int adjOverlapNorth = adjFillBlack[LodDirection.NORTH.ordinal() - 2] ? ColorUtil.BLACK : ColorUtil.TRANSPARENT;
+			if (adjDataNorth == null)
+			{
+				builder.addQuadAdj(LodDirection.NORTH, x, y, z, xSize, ySize, color, (byte) 15, blockLight);
+			}
+			else if (adjDataNorth.length == 1)
+			{
+				makeAdjQuads(builder, adjDataNorth[0], LodDirection.NORTH, x, y, z, xSize, ySize,
+						color, adjOverlapNorth, skyLightTop, blockLight);
+			}
+			else
+			{
+				makeAdjQuads(builder, adjDataNorth[0], LodDirection.NORTH, x, y, z, (short) (xSize / 2), ySize,
+						color, adjOverlapNorth, skyLightTop, blockLight);
+				makeAdjQuads(builder, adjDataNorth[1], LodDirection.NORTH, (short) (x + xSize / 2), y, z, (short) (xSize / 2), ySize,
+						color, adjOverlapNorth, skyLightTop, blockLight);
+			}
+		}
+		
+		//SOUTH face vertex creation
+		{
+			long[][] adjDataSouth = adjData[LodDirection.SOUTH.ordinal() - 2];
+			int adjOverlapSouth = adjFillBlack[LodDirection.SOUTH.ordinal() - 2] ? ColorUtil.BLACK : ColorUtil.TRANSPARENT;
+			if (adjDataSouth == null)
+			{
+				builder.addQuadAdj(LodDirection.SOUTH, x, y, maxZ, xSize, ySize, color, (byte) 15, blockLight);
+			}
+			else if (adjDataSouth.length == 1)
+			{
+				makeAdjQuads(builder, adjDataSouth[0], LodDirection.SOUTH, x, y, maxZ, xSize, ySize,
+						color, adjOverlapSouth, skyLightTop, blockLight);
+			}
+			else
+			{
+				makeAdjQuads(builder, adjDataSouth[0], LodDirection.SOUTH, x, y, maxZ, (short) (xSize / 2), ySize,
+						color, adjOverlapSouth, skyLightTop, blockLight);
+				
+				makeAdjQuads(builder, adjDataSouth[1], LodDirection.SOUTH, (short) (x + xSize / 2), y, maxZ, (short) (xSize / 2), ySize,
+						color, adjOverlapSouth, skyLightTop, blockLight);
+			}
+		}
+		
+		//WEST face vertex creation
+		{
+			long[][] adjDataWest = adjData[LodDirection.WEST.ordinal() - 2];
+			int adjOverlapWest = adjFillBlack[LodDirection.WEST.ordinal() - 2] ? ColorUtil.BLACK : ColorUtil.TRANSPARENT;
+			if (adjDataWest == null)
+			{
+				builder.addQuadAdj(LodDirection.WEST, x, y, z, zSize, ySize, color, (byte) 15, blockLight);
+			}
+			else if (adjDataWest.length == 1)
+			{
+				makeAdjQuads(builder, adjDataWest[0], LodDirection.WEST, x, y, z, zSize, ySize,
+						color, adjOverlapWest, skyLightTop, blockLight);
+			}
+			else
+			{
+				makeAdjQuads(builder, adjDataWest[0], LodDirection.WEST, x, y, z, (short) (zSize / 2), ySize,
+						color, adjOverlapWest, skyLightTop, blockLight);
+				makeAdjQuads(builder, adjDataWest[1], LodDirection.WEST, x, y, (short) (z + zSize / 2), (short) (zSize / 2), ySize,
+						color, adjOverlapWest, skyLightTop, blockLight);
+			}
+		}
+		
+		//EAST face vertex creation
+		{
+			long[][] adjDataEast = adjData[LodDirection.EAST.ordinal() - 2];
+			int adjOverlapEast = adjFillBlack[LodDirection.EAST.ordinal() - 2] ? ColorUtil.BLACK : ColorUtil.TRANSPARENT;
+			if (adjData[LodDirection.EAST.ordinal() - 2] == null)
+			{
+				builder.addQuadAdj(LodDirection.EAST, maxX, y, z, zSize, ySize, color, (byte) 15, blockLight);
+			}
+			else if (adjDataEast.length == 1)
+			{
+				makeAdjQuads(builder, adjDataEast[0], LodDirection.EAST, maxX, y, z, zSize, ySize,
+						color, adjOverlapEast, skyLightTop, blockLight);
+			}
+			else
+			{
+				makeAdjQuads(builder, adjDataEast[0], LodDirection.EAST, maxX, y, z, (short) (zSize / 2), ySize,
+						color, adjOverlapEast, skyLightTop, blockLight);
+				makeAdjQuads(builder, adjDataEast[1], LodDirection.EAST, maxX, y, (short) (z + zSize / 2), (short) (zSize / 2), ySize,
+						color, adjOverlapEast, skyLightTop, blockLight);
+			}
+		}
+	}
+	
+	private static void makeAdjQuads(LodQuadBuilder builder, long[] adjData, LodDirection direction, short x, short y,
+			short z, short w0, short wy, int color, int overlapColor, byte upSkyLight, byte blockLight)
+	{
+		color = ColorUtil.applyShade(color, MC.getShade(direction));
+		long[] dataPoint = adjData;
+		if (dataPoint == null || DataPointUtil.isVoid(dataPoint[0]))
+		{
+			builder.addQuadAdj(direction, x, y, z, w0, wy, color, (byte) 15, blockLight);
+			return;
+		}
+		
+		int i;
+		boolean firstFace = true;
+		boolean allAbove = true;
+		short previousDepth = -1;
+		byte nextSkyLight = upSkyLight;
+		
+		// TODO transparency ocean floor fix
+		// boolean isOpaque = ((colorMap[0] >> 24) & 0xFF) == 255;
+		for (i = 0; i < dataPoint.length && DataPointUtil.doesItExist(adjData[i])
+				&& !DataPointUtil.isVoid(adjData[i]); i++)
+		{
+			long adjPoint = adjData[i];
+			
+			// TODO transparency ocean floor fix
+			// if (isOpaque && DataPointUtil.getAlpha(singleAdjDataPoint) != 255)
+			// continue;
+			
+			short height = DataPointUtil.getHeight(adjPoint);
+			short depth = DataPointUtil.getDepth(adjPoint);
+			
+			// If the depth of said block is higher then our max Y, continue
+			// Basically: y < maxY <= _____ height
+			// _______&&: y < maxY <= depth
+			if (y + wy <= depth)
+				continue;
+			// Now: depth < maxY
+			allAbove = false;
+			
+			if (height < y)
+			{
+				// Basically: _____ height < y < maxY
+				// _______&&: depth ______ < y < maxY
+				if (firstFace)
+				{
+					builder.addQuadAdj(direction, x, y, z, w0, wy, color, DataPointUtil.getLightSky(adjPoint),
+							blockLight);
+				}
+				else
+				{
+					// Now: depth < height < y < previousDepth < maxY
+					if (previousDepth == -1)
+						throw new RuntimeException("Loop error");
+					builder.addQuadAdj(direction, x, y, z, w0, (short) (previousDepth - y), color,
+							DataPointUtil.getLightSky(adjPoint), blockLight);
+					previousDepth = -1;
+				}
+				break;
+			}
+			
+			if (depth <= y)
+			{ // AND y <= height
+				if (y + wy <= height)
+				{
+					// Basically: ________ y < maxY <= height
+					// _______&&: depth <= y < maxY
+					// The face is inside adj face completely.
+					if (overlapColor != 0)
+					{
+						builder.addQuadAdj(direction, x, y, z, w0, wy, overlapColor, (byte) 15, (byte) 15);
+					}
+					break;
+				}
+				// Otherwise: ________ y <= Height < maxY
+				// _______&&: depth <= y _________ < maxY
+				// the adj data intersects the lower part of the current data
+				if (height > y && overlapColor != 0)
+				{
+					builder.addQuadAdj(direction, x, y, z, w0, (short) (height - y), overlapColor, (byte) 15, (byte) 15);
+				}
+				// if this is the only face, use the maxY and break,
+				// if there was another face we finish the last one and break
+				if (firstFace)
+				{
+					builder.addQuadAdj(direction, x, height, z, w0, (short) (y + wy - height), color,
+							DataPointUtil.getLightSky(adjPoint), blockLight);
+				}
+				else
+				{
+					// Now: depth <= y <= height <= previousDepth < maxY
+					if (previousDepth == -1)
+						throw new RuntimeException("Loop error");
+					if (previousDepth > height)
+					{
+						builder.addQuadAdj(direction, x, height, z, w0, (short) (previousDepth - height), color,
+								DataPointUtil.getLightSky(adjPoint), blockLight);
+					}
+					previousDepth = -1;
+				}
+				break;
+			}
+			
+			// In here always true: y < depth < maxY
+			// _________________&&: y < _____ (height and maxY)
+			
+			if (y + wy <= height)
+			{
+				// Basically: y _______ < maxY <= height
+				// _______&&: y < depth < maxY
+				// the adj data intersects the higher part of the current data
+				if (overlapColor != 0)
+				{
+					builder.addQuadAdj(direction, x, depth, z, w0, (short) (y + wy - depth), overlapColor, (byte) 15, (byte) 15);
+				}
+				// we start the creation of a new face
+			}
+			else
+			{
+				// Otherwise: y < _____ height < maxY
+				// _______&&: y < depth ______ < maxY
+				if (overlapColor != 0)
+				{
+					builder.addQuadAdj(direction, x, depth, z, w0, (short) (height - depth), overlapColor, (byte) 15, (byte) 15);
+				}
+				if (firstFace)
+				{
+					builder.addQuadAdj(direction, x, height, z, w0, (short) (y + wy - height), color,
+							DataPointUtil.getLightSky(adjPoint), blockLight);
+				}
+				else
+				{
+					// Now: y < depth < height <= previousDepth < maxY
+					if (previousDepth == -1)
+						throw new RuntimeException("Loop error");
+					if (previousDepth > height)
+					{
+						builder.addQuadAdj(direction, x, height, z, w0, (short) (previousDepth - height), color,
+								DataPointUtil.getLightSky(adjPoint), blockLight);
+					}
+					previousDepth = -1;
+				}
+			}
+			// set next top as current depth
+			previousDepth = depth;
+			firstFace = false;
+			nextSkyLight = upSkyLight;
+			if (i + 1 < adjData.length && DataPointUtil.doesItExist(adjData[i + 1]))
+				nextSkyLight = DataPointUtil.getLightSky(adjData[i + 1]);
+		}
+		
+		if (allAbove)
+		{
+			builder.addQuadAdj(direction, x, y, z, w0, wy, color, upSkyLight, blockLight);
+		}
+		else if (previousDepth != -1)
+		{
+			// We need to finish the last quad.
+			builder.addQuadAdj(direction, x, y, z, w0, (short) (previousDepth - y), color, nextSkyLight,
+					blockLight);
+		}
+	}
+}

src/main/java/com/seibel/lod/core/objects/opengl/LodBufferBuilder.java

@@ -1,557 +0,0 @@
-/*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
- *    licensed under the GNU GPL v3 License.
- *
- *    Copyright (C) 2020  James Seibel
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the GNU General Public License as published by
- *    the Free Software Foundation, version 3.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    GNU General Public License for more details.
- *
- *    You should have received a copy of the GNU General Public License
- *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-
-package com.seibel.lod.core.objects.opengl;
-
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.FloatBuffer;
-import java.util.List;
-
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
-
-import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Lists;
-
-/**
- * A (almost) exact copy of Minecraft's
- * BufferBuilder object. <br>
- * Which allows for creating and filling
- * OpenGL buffers.
- * 
- * @author James Seibel
- * @version 12-9-2021
- */
-public class LodBufferBuilder
-{
-	private static final Logger LOGGER = LogManager.getLogger();
-	public ByteBuffer buffer;
-	
-	private final List<LodBufferBuilder.DrawState> vertexCounts = Lists.newArrayList();
-	private int lastRenderedCountIndex = 0;
-	private int totalRenderedBytes = 0;
-	private int nextElementByte = 0;
-	private int totalUploadedBytes = 0;
-	private int vertices;
-	private LodVertexFormatElement currentElement;
-	private int elementIndex;
-	private int mode;
-	private LodVertexFormat format;
-	private boolean building;
-	
-	
-	
-	
-	public LodBufferBuilder(int bufferSizeInBytes)
-	{
-		this.buffer = allocateByteBuffer(bufferSizeInBytes * 4);
-	}
-	
-	
-	
-	/** originally from MC's GLAllocation class */
-	private ByteBuffer allocateByteBuffer(int bufferSizeInBytes)
-	{
-		return ByteBuffer.allocateDirect(bufferSizeInBytes).order(ByteOrder.nativeOrder());
-	}
-	/** originally from MC's GLAllocation class */
-	@SuppressWarnings("unused")
-	private FloatBuffer allocateFloatBuffer(int bufferSizeInBytes)
-	{
-		return allocateByteBuffer(bufferSizeInBytes).asFloatBuffer();
-	}
-	
-	
-	
-	/** make sure the buffer doesn't overflow when inserting new elements */
-	private void ensureVertexCapacity()
-	{
-		this.ensureCapacity(this.format.getByteSize());
-	}
-	private void ensureCapacity(int vertexSizeInBytes)
-	{
-		if (this.nextElementByte + vertexSizeInBytes > this.buffer.capacity())
-		{
-			int i = this.buffer.capacity();
-			int j = i + roundUp(vertexSizeInBytes);
-			//LOGGER.debug("Needed to grow BufferBuilder buffer: Old size {} bytes, new size {} bytes.", i, j);
-			ByteBuffer bytebuffer = allocateByteBuffer(j);
-			this.buffer.position(0);
-			bytebuffer.put(this.buffer);
-			bytebuffer.rewind();
-			this.buffer = bytebuffer;
-		}
-	}
-	private static int roundUp(int vertexSizeInBytes)
-	{
-		int i = 2097152; // 2 ^ 21
-		if (vertexSizeInBytes == 0)
-		{
-			return i;
-		}
-		else
-		{
-			if (vertexSizeInBytes < 0)
-			{
-				i *= -1;
-			}
-			
-			int j = vertexSizeInBytes % i;
-			return j == 0 ? vertexSizeInBytes : vertexSizeInBytes + i - j;
-		}
-	}
-	
-	
-	/* not currently needed sortQuads()
-	// the x,y,z location is a blockPos
-	public void sortQuads(float x, float y, float z)
-	{
-		((Buffer) this.buffer).clear();
-		FloatBuffer floatbuffer = this.buffer.asFloatBuffer();
-		int i = this.vertices / 4;
-		float[] afloat = new float[i];
-		
-		for (int j = 0; j < i; ++j)
-		{
-			afloat[j] = getQuadDistanceFromPlayer(floatbuffer, x, y, z, this.format.getIntegerSize(), this.totalRenderedBytes / 4 + j * this.format.getVertexSize());
-		}
-		
-		int[] aint = new int[i];
-		
-		for (int k = 0; k < aint.length; aint[k] = k++)
-		{
-		}
-		
-		IntArrays.mergeSort(aint, (p_227830_1_, p_227830_2_) ->
-		{
-			return Floats.compare(afloat[p_227830_2_], afloat[p_227830_1_]);
-		});
-		BitSet bitset = new BitSet();
-		FloatBuffer floatbuffer1 = allocateFloatBuffer(this.format.getIntegerSize() * 4);
-		
-		for (int l = bitset.nextClearBit(0); l < aint.length; l = bitset.nextClearBit(l + 1))
-		{
-			int i1 = aint[l];
-			if (i1 != l)
-			{
-				this.limitToVertex(floatbuffer, i1);
-				((Buffer) floatbuffer1).clear();
-				floatbuffer1.put(floatbuffer);
-				int j1 = i1;
-				
-				for (int k1 = aint[i1]; j1 != l; k1 = aint[k1])
-				{
-					this.limitToVertex(floatbuffer, k1);
-					FloatBuffer floatbuffer2 = floatbuffer.slice();
-					this.limitToVertex(floatbuffer, j1);
-					floatbuffer.put(floatbuffer2);
-					bitset.set(j1);
-					j1 = k1;
-				}
-				
-				this.limitToVertex(floatbuffer, l);
-				((Buffer) floatbuffer1).flip();
-				floatbuffer.put(floatbuffer1);
-			}
-			
-			bitset.set(l);
-		}
-	}
-	
-	
-	private void limitToVertex(FloatBuffer p_227829_1_, int p_227829_2_)
-	{
-		int i = this.format.getIntegerSize() * 4;
-		((Buffer) p_227829_1_).limit(this.totalRenderedBytes / 4 + (p_227829_2_ + 1) * i);
-		((Buffer) p_227829_1_).position(this.totalRenderedBytes / 4 + p_227829_2_ * i);
-	}
-	*/
-	
-	/* not curerntly needed getState()
-	public LodBufferBuilder.State getState()
-	{
-		((Buffer) this.buffer).limit(this.nextElementByte);
-		((Buffer) this.buffer).position(this.totalRenderedBytes);
-		ByteBuffer bytebuffer = ByteBuffer.allocate(this.vertices * this.format.getVertexSize());
-		bytebuffer.put(this.buffer);
-		((Buffer) this.buffer).clear();
-		return new LodBufferBuilder.State(bytebuffer, this.format);
-	}
-	*/
-	
-	/* not currently needed getQuadDistanceFromPlayer()
-	private static float getQuadDistanceFromPlayer(FloatBuffer floatBuffer, float x, float y, float z, int p_181665_4_, int p_181665_5_)
-	{
-		float f = floatBuffer.get(p_181665_5_ + p_181665_4_ * 0 + 0);
-		float f1 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 0 + 1);
-		float f2 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 0 + 2);
-		float f3 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 1 + 0);
-		float f4 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 1 + 1);
-		float f5 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 1 + 2);
-		float f6 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 2 + 0);
-		float f7 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 2 + 1);
-		float f8 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 2 + 2);
-		float f9 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 3 + 0);
-		float f10 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 3 + 1);
-		float f11 = floatBuffer.get(p_181665_5_ + p_181665_4_ * 3 + 2);
-		float f12 = (f + f3 + f6 + f9) * 0.25F - x;
-		float f13 = (f1 + f4 + f7 + f10) * 0.25F - y;
-		float f14 = (f2 + f5 + f8 + f11) * 0.25F - z;
-		return f12 * f12 + f13 * f13 + f14 * f14;
-	}
-	*/
-	
-	/* not currently needed restoreState()
-	public void restoreState(LodBufferBuilder.State bufferState)
-	{
-		((Buffer) bufferState.data).clear();
-		int i = bufferState.data.capacity();
-		this.ensureCapacity(i);
-		((Buffer) this.buffer).limit(this.buffer.capacity());
-		((Buffer) this.buffer).position(this.totalRenderedBytes);
-		this.buffer.put(bufferState.data);
-		((Buffer) this.buffer).clear();
-		LodVertexFormat LodVertexFormat = bufferState.format;
-		this.switchFormat(LodVertexFormat);
-		this.vertices = i / LodVertexFormat.getVertexSize();
-		this.nextElementByte = this.totalRenderedBytes + this.vertices * LodVertexFormat.getVertexSize();
-	}
-	*/
-	
-	
-	
-	
-
-	private void switchFormat(LodVertexFormat newFormat)
-	{
-		format = newFormat;
-	}
-	
-	
-	
-	
-	//========================================//
-	// methods for actually building a buffer //
-	//========================================//
-	
-	/**
-	 * @param openGlLodVertexFormat GL11.GL_QUADS, GL11.GL_TRIANGLES, etc.
-	 * @param LodVertexFormat
-	 */
-	public void begin(int openGlLodVertexFormat, LodVertexFormat LodVertexFormat)
-	{
-		if (this.building)
-		{
-			throw new IllegalStateException("Already building!");
-		}
-		else
-		{
-			this.building = true;
-			this.mode = openGlLodVertexFormat;
-			this.switchFormat(LodVertexFormat);
-			this.currentElement = LodVertexFormat.getElements().get(0);
-			this.elementIndex = 0;
-			this.buffer.clear();
-		}
-	}
-	
-	public void end()
-	{
-		if (!this.building)
-		{
-			throw new IllegalStateException("Not building!");
-		}
-		else
-		{
-			this.building = false;
-			this.vertexCounts.add(new LodBufferBuilder.DrawState(this.format, this.vertices, this.mode));
-			this.totalRenderedBytes += this.vertices * this.format.getByteSize();
-			this.vertices = 0;
-			this.currentElement = null;
-			this.elementIndex = 0;
-		}
-	}
-	
-	public void putByte(int index, byte newByte)
-	{
-		this.buffer.put(this.nextElementByte + index, newByte);
-	}
-	
-	public void putShort(int index, short newShort)
-	{
-		this.buffer.putShort(this.nextElementByte + index, newShort);
-	}
-	
-	public void putFloat(int index, float newFloat)
-	{
-		this.buffer.putFloat(this.nextElementByte + index, newFloat);
-	}
-	
-	public void endVertex()
-	{
-		if (this.elementIndex != 0)
-		{
-			throw new IllegalStateException("Not filled all elements of the vertex");
-		}
-		else
-		{
-			++this.vertices;
-			this.ensureVertexCapacity();
-		}
-	}
-	
-	public void nextElement()
-	{
-		ImmutableList<LodVertexFormatElement> immutablelist = this.format.getElements();
-		this.elementIndex = (this.elementIndex + 1) % immutablelist.size();
-		this.nextElementByte += this.currentElement.getByteSize();
-		this.currentElement = immutablelist.get(this.elementIndex);
-//		if (LodVertexFormatelement.getUsage() == LodVertexFormatElement.Usage.PADDING)
-//		{
-//			this.nextElement();
-//		}
-		
-//		if (this.defaultColorSet && this.currentElement.getUsage() == LodVertexFormatElement.Usage.COLOR)
-//		{
-//			color(this.defaultR, this.defaultG, this.defaultB, this.defaultA);
-//		}
-		
-	}
-	
-	public LodBufferBuilder color(int red, int green, int blue, int alpha)
-	{
-		LodVertexFormatElement LodVertexFormatelement = this.currentElement();
-		if (LodVertexFormatelement.getType() != LodVertexFormatElement.DataType.UBYTE)
-		{
-			throw new IllegalStateException("Color must be stored as a UBYTE");
-		}
-		else
-		{
-			this.putByte(0, (byte) red);
-			this.putByte(1, (byte) green);
-			this.putByte(2, (byte) blue);
-			this.putByte(3, (byte) alpha);
-			this.nextElement();
-			return this;
-		}
-	}
-	
-	public LodBufferBuilder minecraftLightValue(byte lightValue)
-	{
-		LodVertexFormatElement LodVertexFormatelement = this.currentElement();
-		if (LodVertexFormatelement.getType() != LodVertexFormatElement.DataType.UBYTE)
-		{
-			throw new IllegalStateException("Light Color must be stored as a UBYTE");
-		}
-		else
-		{
-			this.putByte(0, lightValue);
-			this.nextElement();
-			return this;
-		}
-	}
-	
-	public LodBufferBuilder position(float x, float y, float z)
-	{
-		if (this.currentElement().getType() != LodVertexFormatElement.DataType.FLOAT)
-		{
-			throw new IllegalStateException("Position verticies must be stored as a FLOAT");
-		}
-		else
-		{
-			this.putFloat(0, x);
-			this.putFloat(4, y);
-			this.putFloat(8, z);
-			this.nextElement();
-			return this;
-		}
-	}
-	
-	
-	
-	
-	
-	
-	/* not currently needed fullVertex()
-	 * TODO James isn't sure about these names
-	public void vertex(float blockPosX, float blockPosY, float blockPosZ, 
-			float red, float green, float blue, float alpha, 
-			float textureU, float textureV, 
-			int p_225588_10_, int p_225588_11_, 
-			float p_225588_12_, float p_225588_13_, float p_225588_14_)
-	{
-		if (this.defaultColorSet)
-		{
-			throw new IllegalStateException();
-		}
-		else if (this.fastFormat)
-		{
-			this.putFloat(0, blockPosX);
-			this.putFloat(4, blockPosY);
-			this.putFloat(8, blockPosZ);
-			this.putByte(12, (byte) ((int) (red * 255.0F)));
-			this.putByte(13, (byte) ((int) (green * 255.0F)));
-			this.putByte(14, (byte) ((int) (blue * 255.0F)));
-			this.putByte(15, (byte) ((int) (alpha * 255.0F)));
-			this.putFloat(16, textureU);
-			this.putFloat(20, textureV);
-			int i;
-			if (this.fullFormat)
-			{
-				this.putShort(24, (short) (p_225588_10_ & '\uffff'));
-				this.putShort(26, (short) (p_225588_10_ >> 16 & '\uffff'));
-				i = 28;
-			}
-			else
-			{
-				i = 24;
-			}
-			
-			this.putShort(i + 0, (short) (p_225588_11_ & '\uffff'));
-			this.putShort(i + 2, (short) (p_225588_11_ >> 16 & '\uffff'));
-			this.putByte(i + 4, IVertexConsumer.normalIntValue(p_225588_12_));
-			this.putByte(i + 5, IVertexConsumer.normalIntValue(p_225588_13_));
-			this.putByte(i + 6, IVertexConsumer.normalIntValue(p_225588_14_));
-			this.nextElementByte += i + 8;
-			this.endVertex();
-		}
-		else
-		{
-			super.vertex(blockPosX, blockPosY, blockPosZ, red, green, blue, alpha, textureU, textureV, p_225588_10_, p_225588_11_, p_225588_12_, p_225588_13_, p_225588_14_);
-		}
-	}
-	*/
-	
-	/** 
-	 * James isn't sure what the difference between 
-	 * using this method and just directly getting the buffer would be.
-	 * But this was what was being used before, so it will stay for now.
-	 * 
-	 * If anyone figures out what is special about this, please replace this comment.
-	 */
-	public ByteBuffer getCleanedByteBuffer()
-	{
-		LodBufferBuilder.DrawState bufferbuilder$drawstate = this.vertexCounts.get(this.lastRenderedCountIndex++);
-		this.buffer.position(this.totalUploadedBytes);
-		this.totalUploadedBytes += bufferbuilder$drawstate.vertexCount() * bufferbuilder$drawstate.format().getByteSize();
-		this.buffer.limit(this.totalUploadedBytes);
-		if (this.lastRenderedCountIndex == this.vertexCounts.size() && this.vertices == 0)
-		{
-			this.clear();
-		}
-		
-		ByteBuffer bytebuffer = this.buffer.slice();
-		//bytebuffer.order(this.buffer.order()); // FORGE: Fix incorrect byte order
-		this.buffer.clear();
-		return bytebuffer; // the original method also returned bufferbuilder$drawstate
-	}
-	
-	
-	public void clear()
-	{
-		if (this.totalRenderedBytes != this.totalUploadedBytes)
-		{
-			LOGGER.warn("Bytes mismatch " + this.totalRenderedBytes + " " + this.totalUploadedBytes);
-		}
-		
-		this.discard();
-	}
-	
-	public void discard()
-	{
-		this.totalRenderedBytes = 0;
-		this.totalUploadedBytes = 0;
-		this.nextElementByte = 0;
-		this.vertexCounts.clear();
-		this.lastRenderedCountIndex = 0;
-	}
-	
-	public LodVertexFormatElement currentElement()
-	{
-		if (this.currentElement == null)
-		{
-			throw new IllegalStateException("BufferBuilder not started");
-		}
-		else
-		{
-			return this.currentElement;
-		}
-	}
-	
-	public boolean building()
-	{
-		return this.building;
-	}
-	
-	
-	
-	
-	
-	//==================//
-	// internal classes //
-	//==================//
-	
-	
-	public static final class DrawState
-	{
-		private final LodVertexFormat format;
-		private final int vertexCount;
-		private final int mode;
-		
-		private DrawState(LodVertexFormat p_i225905_1_, int p_i225905_2_, int p_i225905_3_)
-		{
-			this.format = p_i225905_1_;
-			this.vertexCount = p_i225905_2_;
-			this.mode = p_i225905_3_;
-		}
-		
-		public LodVertexFormat format()
-		{
-			return this.format;
-		}
-		
-		public int vertexCount()
-		{
-			return this.vertexCount;
-		}
-		
-		public int mode()
-		{
-			return this.mode;
-		}
-	}
-	
-	
-	
-	// Forge added methods
-	public void putBulkData(ByteBuffer buffer)
-	{
-		ensureCapacity(buffer.limit() + this.format.getByteSize());
-		this.buffer.position(this.vertices * this.format.getByteSize());
-		this.buffer.put(buffer);
-		this.vertices += buffer.limit() / this.format.getByteSize();
-		this.nextElementByte += buffer.limit();
-	}
-	
-	public LodVertexFormat getLodVertexFormat()
-	{
-		return this.format;
-	}
-}

src/main/java/com/seibel/lod/core/objects/opengl/LodVertexFormat.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by

src/main/java/com/seibel/lod/core/objects/opengl/LodVertexFormatElement.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -39,13 +39,19 @@ public class LodVertexFormatElement
 	private final int index;
 	private final int count;
 	private final int byteSize;
+	private final boolean isPadding;
 	
-	public LodVertexFormatElement(int newIndex, LodVertexFormatElement.DataType newType, int newCount)
+	public LodVertexFormatElement(int newIndex, LodVertexFormatElement.DataType newType, int newCount, boolean isPadding)
 	{
 		this.dataType = newType;
 		this.index = newIndex;
 		this.count = newCount;
 		this.byteSize = newType.getSize() * this.count;
+		this.isPadding = isPadding;
+	}
+	
+	public final boolean getIsPadding() {
+		return isPadding;
 	}
 	
 	public final LodVertexFormatElement.DataType getType()

src/main/java/com/seibel/lod/core/objects/opengl/RenderBuffer.java

@@ -0,0 +1,143 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.objects.opengl;
+
+import java.util.ConcurrentModificationException;
+
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodQuadBuilder;
+import com.seibel.lod.core.enums.config.GpuUploadMethod;
+import com.seibel.lod.core.render.LodRenderProgram;
+import com.seibel.lod.core.util.StatsMap;
+
+public abstract class RenderBuffer implements AutoCloseable
+{
+	
+	private enum State {
+		None,
+		Building,
+		Uploading,
+		Closed,
+	}
+	private State owner = State.None;
+	private State nextOwner = State.None;
+	final private void _lockThread(State newOwner) {
+		if (owner != State.None || (nextOwner != State.None && nextOwner != newOwner))
+			throw new ConcurrentModificationException("RenderMethod Illegal state!");
+		owner = newOwner;
+		nextOwner = State.None;
+	}
+	final private void _unlockThread(State oldOwner) {
+		if (owner != oldOwner)
+			throw new ConcurrentModificationException("RenderMethod Illegal state!");
+		owner = State.None;
+	}
+	final private void _unlockThreadTo(State oldOwner, State newOwner) {
+		if (owner != oldOwner)
+			throw new ConcurrentModificationException("RenderMethod Illegal state!");
+		owner = State.None;
+		nextOwner = newOwner;
+	}
+	
+	final public void build(Runnable r) {
+		_lockThread(State.Building);
+		try {
+			r.run();
+		} finally {
+			_unlockThread(State.Building);
+		}
+	}
+
+	/* Return false if current renderMethod is not suited for current builder
+	 * This will auto close the object if returning false. */
+	final public boolean tryUploadBuffers(LodQuadBuilder builder, GpuUploadMethod uploadMethod) {
+		_lockThread(State.Uploading);
+		boolean successful = false;
+		try {
+			successful = uploadBuffers(builder, uploadMethod);
+			return successful;
+		} finally {
+			if (!successful) {
+				_unlockThreadTo(State.Uploading, State.Closed);
+				close();
+			} else { 
+				_unlockThread(State.Uploading);
+			}
+		}
+	}
+
+	// ======================================================================
+	// ====================== Methods for implementations ===================
+	// ======================================================================
+	
+	// =========== Called by build starter thread ==========
+	
+	/* Called on being reused after the object is swapped to the back
+	 *  and a new build event is triggered. Used for cleaning up non
+	 *  reusable objects sooner.
+	 * Note: This is ran on BUILDER thread, and does not have access to
+	 *  GL Context, Use GLProxy.recordOpenGlCall() to access GL Context
+	 *  instead! */
+	public void onReuse() {}
+	
+	// =========== Called by buffer upload thread ==========
+	
+	/* Return false if current renderMethod is not suited for current builder
+	 *  If false, close call will be automatically triggered.
+	 *  If true, the object will be used (by first calling the swapBufferToFront())
+	 *  on tick render. */
+	protected abstract boolean uploadBuffers(LodQuadBuilder builder, GpuUploadMethod uploadMethod);
+	
+	// ========== Called by render thread ==========
+	
+	/* Called on buffer first being used by a render thread. */
+	public void onSwapToFront() {}
+	
+	/* Called on buffer no longer being used. (Life ended)
+	 *  Return false if current object cannot be reused.
+	 * Note: This should not do too much stuff as it is ran on render thread!
+	 *  The corresponding cleanups should be done using the onReuse() to prevent
+	 *  lag spikes! If you want this buffer to not be reused, but cleanup is
+	 *  expensive, use onReuse() instead!
+	 * Note 2: This may not be triggered on some siturations like renderer being
+	 *  terminated, or dimension changed. So implementation should NEVER assume
+	 *  that onSwapToFront() will link to a call of onSwapToBack()! */
+	public boolean onSwapToBack() {return true;}
+	
+	/* Called on... well... rendering.
+	 * Return false if nothing rendered. (Optional) */
+	public abstract boolean render(LodRenderProgram shaderProgram);
+
+	// ========== Called by any thread. (thread safe) ==========
+	
+	/* Called by anyone. This method is allowed to throw exceptions, but
+	 * are never allowed to modify any values. This should behave the same
+	 * to other methods as if the method have never been called.
+	 * Note: This method is PURELY for debug or stats logging ONLY! */
+	public abstract void debugDumpStats(StatsMap statsMap);
+	
+	// ========= Called only when 1 thread is using it =======
+	/* This method is called when object is no longer in use.
+	 * Called either after uploadBuffers() returned false (On buffer Upload
+	 * thread), or by others when the object is not being used. (not in build,
+	 * upload, or render state). */
+	public abstract void close();
+	
+	
+}

src/main/java/com/seibel/lod/core/objects/opengl/RenderRegion.java

@@ -0,0 +1,445 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.objects.opengl;
+
+import java.util.ConcurrentModificationException;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.CubicLodTemplate;
+import com.seibel.lod.core.builders.lodBuilding.LodBuilder;
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodQuadBuilder;
+import com.seibel.lod.core.enums.LodDirection;
+import com.seibel.lod.core.enums.config.GpuUploadMethod;
+import com.seibel.lod.core.enums.rendering.DebugMode;
+import com.seibel.lod.core.enums.rendering.GLProxyContext;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.objects.BoolType;
+import com.seibel.lod.core.objects.PosToRenderContainer;
+import com.seibel.lod.core.objects.lod.LodDimension;
+import com.seibel.lod.core.objects.lod.LodRegion;
+import com.seibel.lod.core.objects.lod.RegionPos;
+import com.seibel.lod.core.objects.math.Vec3d;
+import com.seibel.lod.core.objects.math.Vec3f;
+import com.seibel.lod.core.render.GLProxy;
+import com.seibel.lod.core.render.LodRenderProgram;
+import com.seibel.lod.core.render.RenderUtil;
+import com.seibel.lod.core.util.DataPointUtil;
+import com.seibel.lod.core.util.LevelPosUtil;
+import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.util.StatsMap;
+import com.seibel.lod.core.util.gridList.PosArrayGridList;
+import com.seibel.lod.core.wrapperInterfaces.block.AbstractBlockPosWrapper;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+
+import static com.seibel.lod.core.render.LodRenderer.EVENT_LOGGER;
+
+public class RenderRegion implements AutoCloseable
+{
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	
+	/** stores if the region at the given x and z index needs to be regenerated */
+	// Use int because I need Tri state:
+	private final AtomicInteger needRegen = new AtomicInteger(2);
+	
+	private enum BackState {
+		Unused,
+		Building,
+		Complete,
+	}
+	private enum FrontState {
+		Unused,
+		Rendering,
+		Invalidated,
+	}
+	
+	final RegionPos regionPos;
+	RenderBuffer renderBufferBack = null;
+	AtomicReference<BackState> backState =
+			new AtomicReference<BackState>(BackState.Unused);
+	AtomicReference<FrontState> frontState =
+			new AtomicReference<FrontState>(FrontState.Unused);
+	RenderBuffer renderBufferFront = null;
+	final LodDimension lodDim;
+	
+	public RenderRegion(RegionPos regPos, LodDimension lodDim) {
+		regionPos = regPos;
+		this.lodDim = lodDim;
+	}
+	
+	public boolean canRender(LodDimension lodDim, RegionPos regPos) {
+		return lodDim == this.lodDim && regPos.equals(regionPos);
+	}
+	
+	public void setNeedRegen() {
+		needRegen.set(2);
+	} 
+	
+	public Optional<CompletableFuture<Void>> updateStatus(Executor bufferUploader, Executor bufferBuilder, boolean alwaysRegen, int playerPosX, int playerPosZ, boolean doCaveCulling) {
+		if (alwaysRegen) setNeedRegen();
+		
+		BackState state = backState.get();
+		if (state != BackState.Unused) {
+			EVENT_LOGGER.trace("{}: UpdateStatus rejected. Cause: BackState is {}", regionPos, state);
+			return Optional.empty();
+		}
+
+		LodRegion r = lodDim.getRegion(regionPos.x, regionPos.z);
+		if (r==null) {
+			EVENT_LOGGER.trace("{}: UpdateStatus rejected. Cause: Region is null", regionPos);
+			return Optional.empty();
+		}
+		if (needRegen.get() == 0) {
+			EVENT_LOGGER.trace("{}: UpdateStatus rejected. Cause: Region doesn't need regen", regionPos);
+			return Optional.empty();
+		}
+		
+		if (!backState.compareAndSet(BackState.Unused, BackState.Building)) {
+			EVENT_LOGGER.trace("{}: UpdateStatus rejected. Cause: CAS on BackState failed: ", backState.get());
+			return Optional.empty();
+		}
+		needRegen.decrementAndGet();
+		return Optional.of(startBuid(bufferUploader, bufferBuilder, r, lodDim, playerPosX, playerPosZ, doCaveCulling));
+	}
+	
+	public boolean render(LodDimension renderDim,
+			Vec3d cameraPos, AbstractBlockPosWrapper cameraBlockPos, Vec3f cameraDir,
+			boolean enableDirectionalCulling, LodRenderProgram program) {
+		if (!frontState.compareAndSet(FrontState.Unused, FrontState.Rendering)) return false;
+		try {
+		if (renderDim != lodDim) return false;
+		if (enableDirectionalCulling &&
+				!RenderUtil.isRegionInViewFrustum(cameraBlockPos,
+						cameraDir, regionPos.x, regionPos.z)) return false;
+		BackState state = backState.get();
+		if (state == BackState.Complete) {
+			if (renderBufferBack != null) {
+				EVENT_LOGGER.debug("RenderRegion swap @ {}", regionPos);
+				boolean shouldKeep = renderBufferFront != null && renderBufferFront.onSwapToBack();
+				RenderBuffer temp = shouldKeep ? renderBufferFront : null;
+				renderBufferFront = renderBufferBack;
+				renderBufferBack = temp;
+				if (renderBufferFront != null) renderBufferFront.onSwapToFront();
+			}
+			if (!backState.compareAndSet(BackState.Complete, BackState.Unused)) {
+				EVENT_LOGGER.error("RenderRegion.render() got illegal state on swapping buffer!");
+			}
+		}
+		if (renderBufferFront == null) return false;
+		program.setModelPos(new Vec3f(
+				(float) ((regionPos.x * LodUtil.REGION_WIDTH) - cameraPos.x),
+				(float) (LodBuilder.MIN_WORLD_HEIGHT - cameraPos.y),
+				(float) ((regionPos.z * LodUtil.REGION_WIDTH) - cameraPos.z)));
+
+		return renderBufferFront.render(program);
+		} finally {
+			frontState.compareAndSet(FrontState.Rendering, FrontState.Unused);
+		}
+		 
+	}
+	
+	private void recreateBuffer(LodQuadBuilder builder) {
+		if (renderBufferBack != null) throw new RuntimeException("Assert Error");
+		boolean useSimpleBuffer = (builder.getCurrentNeededVertexBufferCount() <= 6) || true;
+		renderBufferBack = useSimpleBuffer ?
+				new SimpleRenderBuffer()
+				: null; //new ComplexRenderRegion(regPos);
+	}
+	
+	private CompletableFuture<Void> startBuid(Executor bufferUploader, Executor bufferBuilder, LodRegion region, LodDimension lodDim, int playerPosX, int playerPosZ, boolean doCaveCulling) {
+		EVENT_LOGGER.trace("RenderRegion startBuild @ {}", regionPos);
+		LodRegion[] adjRegions = new LodRegion[4];
+		try {
+			if (renderBufferBack != null) renderBufferBack.onReuse();
+			for (LodDirection dir : LodDirection.ADJ_DIRECTIONS) {
+				adjRegions[dir.ordinal() - 2] = lodDim.getRegion(regionPos.x+dir.getNormal().x, regionPos.z+dir.getNormal().z);
+			}
+		} catch (NullPointerException | ArrayIndexOutOfBoundsException e) { // HOTFIX: Error ignoring for a concurrency caused issue
+			setNeedRegen();
+			if (!backState.compareAndSet(BackState.Building, BackState.Unused)) {
+				EVENT_LOGGER.error("\"Lod Builder Starter\""
+								+ " encountered error on catching exceptions and fallback on starting build task: ",
+						new ConcurrentModificationException("RenderRegion Illegal State"));
+			}
+			EVENT_LOGGER.info("\"Lod Builder Starter\" failed due to possible known concurrency issue: ", e);
+			return CompletableFuture.completedFuture(null);
+		} catch (Throwable t) {
+			setNeedRegen();
+			if (!backState.compareAndSet(BackState.Building, BackState.Unused)) {
+				EVENT_LOGGER.error("\"Lod Builder Starter\""
+					+ " encountered error on catching exceptions and fallback on starting build task: ",
+					new ConcurrentModificationException("RenderRegion Illegal State"));
+			}
+			throw t;
+		}
+		return CompletableFuture.supplyAsync(() -> {
+			try {
+				EVENT_LOGGER.trace("RenderRegion start QuadBuild @ {}", regionPos);
+				int skyLightCullingBelow = CONFIG.client().graphics().advancedGraphics().getCaveCullingHeight();
+				// FIXME: Clamp also to the max world height.
+				skyLightCullingBelow = Math.max(skyLightCullingBelow, LodBuilder.MIN_WORLD_HEIGHT);
+				LodQuadBuilder builder = new LodQuadBuilder(doCaveCulling, skyLightCullingBelow);
+				Runnable buildRun = ()->{
+					makeLodRenderData(builder, region, adjRegions, playerPosX, playerPosZ);
+				};
+				if (renderBufferBack != null)
+					renderBufferBack.build(buildRun);
+				else
+					buildRun.run();
+				EVENT_LOGGER.trace("RenderRegion end QuadBuild @ {}", regionPos);
+				return builder;
+			} catch (NullPointerException | ArrayIndexOutOfBoundsException e) {
+				EVENT_LOGGER.info("\"LodNodeBufferBuilder\" failed due to possible known concurrency issue: ", e);
+				throw e; // HOTFIX: Error ignoring for a concurrency caused issue
+			} catch (Throwable e3) {
+				EVENT_LOGGER.error("\"LodNodeBufferBuilder\" was unable to build quads: ", e3);
+				throw e3;
+			}
+		}, bufferBuilder)
+				
+				.thenAcceptAsync((builder) -> {
+			try {
+				EVENT_LOGGER.trace("RenderRegion start Upload @ {}", regionPos);
+				GLProxy glProxy = GLProxy.getInstance();
+				GpuUploadMethod method = GLProxy.getInstance().getGpuUploadMethod();
+				GLProxyContext oldContext = glProxy.getGlContext();
+				glProxy.setGlContext(GLProxyContext.LOD_BUILDER);
+				try {
+					if (renderBufferBack == null) recreateBuffer(builder);
+					if (!renderBufferBack.tryUploadBuffers(builder, method)) {
+						renderBufferBack = null;
+						recreateBuffer(builder);
+						if (!renderBufferBack.tryUploadBuffers(builder, method)) {
+							throw new RuntimeException("Newly created renderBuffer "
+									+ "is still returning false on tryUploadBuffers!");
+						}
+					}
+				} finally {
+					glProxy.setGlContext(oldContext);
+				}
+				EVENT_LOGGER.trace("RenderRegion end Upload @ {}", regionPos);
+			} catch (Throwable e3) {
+				EVENT_LOGGER.error("\"LodNodeBufferBuilder\" was unable to upload buffer: ", e3);
+				throw e3;
+			}
+		}, bufferUploader).handle((v, e) -> {
+			if (e != null) {
+				setNeedRegen();
+				if (!backState.compareAndSet(BackState.Building, BackState.Unused)) {
+					EVENT_LOGGER.error("\"LodNodeBufferBuilder\""
+						+ " encountered error on exit: ",
+						new ConcurrentModificationException("RenderRegion Illegal State"));
+				}
+			} else {
+				if (!backState.compareAndSet(BackState.Building, BackState.Complete)) {
+					EVENT_LOGGER.error("\"LodNodeBufferBuilder\""
+							+ " encountered error on exit: ",
+							new ConcurrentModificationException("RenderRegion Illegal State"));
+				}
+			}
+			return (Void) null;
+		});
+	}
+
+	private static final int ADJACENT8[][] = {
+			{-1,-1},
+			{-1, 0},
+			{-1, 1},
+			{ 0,-1},
+			//{ 0, 0},
+			{ 0, 1},
+			{ 1,-1},
+			{ 1, 0},
+			{ 1, 1}
+	};
+
+	private static void makeLodRenderData(LodQuadBuilder quadBuilder, LodRegion region, LodRegion[] adjRegions, int playerX,
+			int playerZ) {
+		byte minDetail = region.getMinDetailLevel();
+		
+		// Variable initialization
+		DebugMode debugMode = CONFIG.client().advanced().debugging().getDebugMode();
+
+		// We ask the lod dimension which block we have to render given the player
+		// position
+		PosToRenderContainer posToRender = new PosToRenderContainer(minDetail, region.regionPosX, region.regionPosZ);
+		region.getPosToRender(posToRender, playerX, playerZ);
+		PosArrayGridList<BoolType> chunkGrid = ClientApi.renderer.vanillaChunks;
+
+		for (int index = 0; index < posToRender.getNumberOfPos(); index++) {
+
+			byte detailLevel = posToRender.getNthDetailLevel(index);
+			int posX = posToRender.getNthPosX(index);
+			int posZ = posToRender.getNthPosZ(index);
+			
+			// TODO: In the future, We don't need to ignore rendered chunks! Just build it
+			// and leave it for the renderer to decide!
+			// We don't want to render this fake block if
+			// The block is inside the render distance with, is not bigger than a chunk and
+			// is positioned in a chunk set as vanilla rendered
+
+			// The block is in the player chunk or in a chunk adjacent to the player
+			if (detailLevel <= LodUtil.CHUNK_DETAIL_LEVEL) {
+				int chunkX = LevelPosUtil.getChunkPos(detailLevel, posX);
+				int chunkZ = LevelPosUtil.getChunkPos(detailLevel, posZ);
+				// skip any chunks that Minecraft is going to render
+				if (chunkGrid != null && chunkGrid.get(chunkX, chunkZ) != null) continue;
+			}
+
+			long[] posData = region.getAllData(detailLevel, posX, posZ);
+			if (posData == null || posData.length == 0 || !DataPointUtil.doesItExist(posData[0])
+					|| DataPointUtil.isVoid(posData[0]))
+				continue;
+			
+			long[][][] adjData = new long[4][][];
+			boolean[] adjUseBlack = new boolean[4];
+
+			// We extract the adj data in the four cardinal direction
+
+			// we first reset the adjShadeDisabled. This is used to disable the shade on the
+			// border when we have transparent block like water or glass
+			// to avoid having a "darker border" underground
+			// Arrays.fill(adjShadeDisabled, false);
+			
+			// We check every adj block in each direction
+			
+			// If the adj block is rendered in the same region and with same detail
+			// and is positioned in a place that is not going to be rendered by vanilla game
+			// then we can set this position as adj
+			// We avoid cases where the adjPosition is in player chunk while the position is
+			// not
+			// to always have a wall underwater
+			for (LodDirection lodDirection : LodDirection.ADJ_DIRECTIONS) {
+				try {
+					int xAdj = posX + lodDirection.getNormal().x;
+					int zAdj = posZ + lodDirection.getNormal().z;
+					int chunkXAdj = LevelPosUtil.getChunkPos(detailLevel, xAdj);
+					int chunkZAdj = LevelPosUtil.getChunkPos(detailLevel, zAdj);
+					if (chunkGrid != null && chunkGrid.get(chunkXAdj, chunkZAdj)!=null) {
+						adjUseBlack[lodDirection.ordinal()-2] = true;
+					}
+
+					boolean isCrossRegionBoundary = LevelPosUtil.getRegion(detailLevel, xAdj) != region.regionPosX ||
+							LevelPosUtil.getRegion(detailLevel, zAdj) != region.regionPosZ;
+
+					LodRegion adjRegion;
+					byte adjDetail;
+					int childXAdj = xAdj*2 + (lodDirection.getNormal().x<0 ? 1 : 0);
+					int childZAdj = zAdj*2 + (lodDirection.getNormal().z<0 ? 1 : 0);
+
+					//we check if the detail of the adjPos is equal to the correct one (region border fix)
+					//or if the detail is wrong by 1 value (region+circle border fix)
+					if (isCrossRegionBoundary) {
+						//we compute at which detail that position should be rendered
+						adjRegion = adjRegions[lodDirection.ordinal()-2];
+						if(adjRegion == null) continue;
+						adjDetail = adjRegion.getRenderDetailLevelAt(playerX, playerZ, detailLevel, xAdj, zAdj);
+					} else {
+						adjRegion = region;
+						if (posToRender.contains(detailLevel, xAdj, zAdj)) adjDetail = detailLevel;
+						else if (detailLevel>0 &&
+								posToRender.contains((byte) (detailLevel-1), childXAdj, childZAdj))
+							adjDetail = (byte) (detailLevel-1);
+						else if (detailLevel<LodUtil.REGION_DETAIL_LEVEL &&
+								posToRender.contains((byte) (detailLevel+1), xAdj/2, zAdj/2))
+							adjDetail = (byte) (detailLevel+1);
+						else continue;
+					}
+
+					if (adjDetail < detailLevel-1 || adjDetail > detailLevel+1) {
+						continue;
+					}
+
+					if (adjDetail == detailLevel || adjDetail > detailLevel) {
+						adjData[lodDirection.ordinal() - 2] = new long[1][];
+						adjData[lodDirection.ordinal() - 2][0] = adjRegion.getAllData(adjDetail,
+								LevelPosUtil.convert(detailLevel, xAdj, adjDetail),
+								LevelPosUtil.convert(detailLevel, zAdj, adjDetail));
+					} else {
+						adjData[lodDirection.ordinal() - 2] = new long[2][];
+						adjData[lodDirection.ordinal() - 2][0] = adjRegion.getAllData(adjDetail,
+								childXAdj, childZAdj);
+						adjData[lodDirection.ordinal() - 2][1] = adjRegion.getAllData(adjDetail,
+								childXAdj + (lodDirection.getAxis()==LodDirection.Axis.X ? 0 : 1),
+								childZAdj + (lodDirection.getAxis()==LodDirection.Axis.Z ? 0 : 1));
+					}
+				} catch (RuntimeException e) {
+					EVENT_LOGGER.warn("Failed to get adj data for [{}:{},{}] at [{}]", detailLevel, posX, posZ, lodDirection);
+					EVENT_LOGGER.warn("Detail exception: ", e);
+				}
+			}
+			
+			// We render every vertical lod present in this position
+			// We only stop when we find a block that is void or non-existing block
+			for (int i = 0; i < posData.length; i++) {
+				long data = posData[i];
+				// If the data is not renderable (Void or non-existing) we stop since there is
+				// no data left in this position
+				if (DataPointUtil.isVoid(data) || !DataPointUtil.doesItExist(data))
+					break;
+
+				long adjDataTop = i - 1 >= 0 ? posData[i - 1] : DataPointUtil.EMPTY_DATA;
+				long adjDataBot = i + 1 < posData.length ? posData[i + 1] : DataPointUtil.EMPTY_DATA;
+
+				// We send the call to create the vertices
+				CubicLodTemplate.addLodToBuffer(data, adjDataTop, adjDataBot, adjData, adjUseBlack, detailLevel,
+						LevelPosUtil.getRegionModule(detailLevel, posX),
+						LevelPosUtil.getRegionModule(detailLevel, posZ), quadBuilder, debugMode);
+			}
+
+		} // for pos to in list to render
+			// the thread executed successfully
+		// Merge all quads
+		quadBuilder.mergeQuads();
+	}
+
+	
+	@Override
+	public void close()
+	{
+		if (renderBufferBack != null) renderBufferBack.close();
+		while (frontState.get() != FrontState.Invalidated && !frontState.compareAndSet(FrontState.Unused, FrontState.Invalidated)) {
+			Thread.yield(); //FIXME: If on java 9, use Thread.onSpinWait();
+		}
+		if (renderBufferFront != null) renderBufferFront.close();
+	}
+
+	public void debugDumpStats(StatsMap statsMap)
+	{
+		statsMap.incStat("RenderRegions");
+		RenderBuffer front = renderBufferFront;
+		if (front!=null) {
+			statsMap.incStat("FrontBuffers");
+			front.debugDumpStats(statsMap);
+		}
+		
+		RenderBuffer back = renderBufferBack;
+		if (back!=null) {
+			statsMap.incStat("BackBuffers");
+			back.debugDumpStats(statsMap);
+		}
+		
+		
+	}
+}

src/main/java/com/seibel/lod/core/objects/opengl/SimpleRenderBuffer.java

@@ -0,0 +1,198 @@
+/*
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
+ *    licensed under the GNU GPL v3 License.
+ *
+ *    Copyright (C) 2020-2022  James Seibel
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, version 3.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package com.seibel.lod.core.objects.opengl;
+
+import java.nio.ByteBuffer;
+import java.util.Iterator;
+import java.util.concurrent.TimeUnit;
+
+import com.seibel.lod.core.api.ClientApi;
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodQuadBuilder;
+import com.seibel.lod.core.render.LodRenderer;
+import com.seibel.lod.core.render.objects.GLVertexBuffer;
+import org.lwjgl.opengl.GL32;
+
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodBufferBuilderFactory;
+import com.seibel.lod.core.enums.config.GpuUploadMethod;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.builders.lodBuilding.bufferBuilding.LodQuadBuilder.BufferFiller;
+import com.seibel.lod.core.render.GLProxy;
+import com.seibel.lod.core.render.LodRenderProgram;
+import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.util.StatsMap;
+import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
+
+import static com.seibel.lod.core.render.GLProxy.GL_LOGGER;
+
+public class SimpleRenderBuffer extends RenderBuffer
+{
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
+	private static final long MAX_BUFFER_UPLOAD_TIMEOUT_NANOSECONDS = 1_000_000;
+
+	GLVertexBuffer[] vbos;
+	
+	// public void onReuse() {}
+	
+	public SimpleRenderBuffer() {
+		vbos = new GLVertexBuffer[0];
+	}
+	
+	@Override
+	protected boolean uploadBuffers(LodQuadBuilder builder, GpuUploadMethod method)
+	{
+		// if (builder.getCurrentNeededVertexBuffers()>6) return false;
+
+		if (method.useEarlyMapping) {
+			_uploadBuffersMapped(builder, method);
+		} else {
+			_uploadBuffersDirect(builder, method);
+		}
+		return true;
+	}
+	
+	// public void onSwapToFront() {}
+	// public void onSwapToBack() {}
+
+	@Override
+	public boolean render(LodRenderProgram shaderProgram)
+	{
+		boolean hasRendered = false;
+		for (GLVertexBuffer vbo : vbos) {
+			if (vbo == null) continue;
+			if (vbo.getVertexCount() == 0) continue;
+			hasRendered = true;
+			vbo.bind();
+			shaderProgram.bindVertexBuffer(vbo.getId());
+			if (LodRenderer.ENABLE_IBO) {
+				GL32.glDrawElements(GL32.GL_TRIANGLES, (vbo.getVertexCount()/4)*6, ClientApi.renderer.quadIBO.getType(), 0);
+			} else {
+				GL32.glDrawArrays(GL32.GL_TRIANGLES, 0, vbo.getVertexCount());
+			}
+			//LodRenderer.tickLogger.info("Vertex buffer: {}", vbo);
+		}
+		return hasRendered;
+	}
+	
+	@Override
+	public void debugDumpStats(StatsMap statsMap)
+	{
+		statsMap.incStat("RenderBuffers");
+		statsMap.incStat("SimpleRenderBuffers");
+		for (GLVertexBuffer b : vbos) {
+			if (b == null) continue;
+			statsMap.incStat("VBOs");
+			if (b.getSize() == LodBufferBuilderFactory.FULL_SIZED_BUFFER) {
+				statsMap.incStat("FullsizedVBOs");
+			}
+			if (b.getSize() == 0) GL_LOGGER.warn("VBO with size 0");
+			statsMap.incBytesStat("TotalUsage", b.getSize());
+		}
+	}
+	
+	@Override
+	public void close()
+	{
+		GLProxy.getInstance().recordOpenGlCall(() -> {
+			for (GLVertexBuffer b : vbos) {
+				b.destroy(false);
+			}
+		});
+	}
+	
+	private void _uploadBuffersDirect(LodQuadBuilder builder, GpuUploadMethod method) {
+		resize(builder.getCurrentNeededVertexBufferCount());
+		long remainingNS = 0;
+		long BPerNS = CONFIG.client().advanced().buffers().getGpuUploadPerMegabyteInMilliseconds();
+		
+		int i = 0;
+		Iterator<ByteBuffer> iter = builder.makeVertexBuffers();
+		while (iter.hasNext()) {
+			if (i >= vbos.length) {
+				throw new RuntimeException("Too many vertex buffers!!");
+			}
+			ByteBuffer bb = iter.next();
+			GLVertexBuffer vbo = getOrMakeVbo(i++, method.useBufferStorage);
+			int size = bb.limit() - bb.position();
+			try {
+				vbo.bind();
+				vbo.uploadBuffer(bb, size/LodUtil.LOD_VERTEX_FORMAT.getByteSize(), method, LodBufferBuilderFactory.FULL_SIZED_BUFFER);
+			} catch (Exception e) {
+				vbos[i-1] = null;
+				vbo.close();
+				ApiShared.LOGGER.error("Failed to upload buffer: ", e);
+			}
+			if (BPerNS<=0) continue;
+			// upload buffers over an extended period of time
+			// to hopefully prevent stuttering.
+			remainingNS += size * BPerNS;
+			if (remainingNS >= TimeUnit.NANOSECONDS.convert(1000 / 60, TimeUnit.MILLISECONDS)) {
+				if (remainingNS > MAX_BUFFER_UPLOAD_TIMEOUT_NANOSECONDS)
+					remainingNS = MAX_BUFFER_UPLOAD_TIMEOUT_NANOSECONDS;
+				try {
+					Thread.sleep(remainingNS / 1000000, (int) (remainingNS % 1000000));
+				} catch (InterruptedException e) {
+				}
+				remainingNS = 0;
+			}
+		}
+		if (i < vbos.length) {
+			throw new RuntimeException("Too few vertex buffers!!");
+		}
+	}
+
+	private void _uploadBuffersMapped(LodQuadBuilder builder, GpuUploadMethod method)
+	{
+		resize(builder.getCurrentNeededVertexBufferCount());
+		for (int i=0; i<vbos.length; i++) {
+			if (vbos[i]==null) vbos[i] = new GLVertexBuffer(method.useBufferStorage);
+		}
+		BufferFiller func = builder.makeBufferFiller(method);
+		int i = 0;
+		while (i < vbos.length && func.fill(vbos[i++])) {}
+	}
+
+	private GLVertexBuffer getOrMakeVbo(int iIndex, boolean useBuffStorage) {
+		if (vbos[iIndex] == null) {
+			vbos[iIndex] = new GLVertexBuffer(useBuffStorage);
+		}
+		return vbos[iIndex];
+	}
+	
+	private void resize(int size) {
+		if (vbos.length != size) {
+			GLVertexBuffer[] newVbos = new GLVertexBuffer[size];
+			if (vbos.length > size) {
+				for (int i=size; i<vbos.length; i++) {
+					if (vbos[i]!=null) vbos[i].close();
+					vbos[i] = null;
+				}
+			}
+			for (int i=0; i<newVbos.length && i<vbos.length; i++) {
+				newVbos[i] = vbos[i];
+				vbos[i] = null;
+			}
+			for (GLVertexBuffer b : vbos) {
+				if (b != null) throw new RuntimeException("LEAKING VBO!");
+			}
+			vbos = newVbos;
+		}
+	}
+}

src/main/java/com/seibel/lod/core/render/F3Screen.java

@@ -0,0 +1,14 @@
+package com.seibel.lod.core.render;
+
+import com.seibel.lod.core.ModInfo;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class F3Screen {
+    public static List<String> f3List = Arrays.asList(
+            "",
+            ModInfo.READABLE_NAME + " version: " + ModInfo.VERSION
+    );
+    public static boolean renderCustomF3 = false;
+}

src/main/java/com/seibel/lod/core/render/GLProxy.java

@@ -1,5 +1,5 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
  *    Copyright (C) 2021  James Seibel
@@ -19,13 +19,15 @@
 
 package com.seibel.lod.core.render;
 
-import java.io.File;
 import java.io.FileNotFoundException;
-import java.io.IOException;
 import java.io.PrintStream;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
 
+import com.seibel.lod.core.api.ApiShared;
+import com.seibel.lod.core.logging.ConfigBasedLogger;
+import org.apache.logging.log4j.LogManager;
 import org.lwjgl.glfw.GLFW;
 import org.lwjgl.opengl.GL;
 import org.lwjgl.opengl.GL11;
@@ -35,13 +37,13 @@ import org.lwjgl.opengl.GLUtil;
 
 import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import com.seibel.lod.core.ModInfo;
-import com.seibel.lod.core.api.ClientApi;
 import com.seibel.lod.core.enums.config.GpuUploadMethod;
-import com.seibel.lod.core.enums.rendering.DebugMode;
 import com.seibel.lod.core.enums.rendering.GLProxyContext;
-import com.seibel.lod.core.util.SingletonHandler;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.util.GLMessage;
+import com.seibel.lod.core.util.GLMessageOutputStream;
 import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
-import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
+import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 
 /**
  * A singleton that holds references to different openGL contexts
@@ -62,13 +64,17 @@ import com.seibel.lod.core.wrapperInterfaces.minecraft.IMinecraftWrapper;
  */
 public class GLProxy
 {
+	public static final boolean OVERWIDE_VANILLA_GL_LOGGER = false;
 	
-	private static final IMinecraftWrapper MC = SingletonHandler.get(IMinecraftWrapper.class);
-	
-	private static final ExecutorService workerThread = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat(GLProxy.class.getSimpleName() + "-Worker-Thread").build());
+	private static final IMinecraftClientWrapper MC = SingletonHandler.get(IMinecraftClientWrapper.class);
+
+	private ExecutorService workerThread = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat(GLProxy.class.getSimpleName() + "-Worker-Thread").build());
 
 	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
-	
+
+	public static final ConfigBasedLogger GL_LOGGER = new ConfigBasedLogger(LogManager.getLogger(GLProxy.class),
+			() -> CONFIG.client().advanced().debugging().debugSwitch().getLogRendererGLEvent());
+
 	private static GLProxy instance = null;
 	
 	/** Minecraft's GLFW window */
@@ -85,72 +91,68 @@ public class GLProxy
 	public final long proxyWorkerGlContext;
 	/** the proxyWorker's GL capabilities */
 	public final GLCapabilities proxyWorkerGlCapabilities;
-	
-	/** Requires OpenGL 4.4, and offers the best buffer uploading */
-	public final boolean bufferStorageSupported;
-	
-	/** Requires OpenGL 4.5 */
-	public final boolean namedObjectSupported;
 
-	/** Requires OpenGL 4.3 */
-	public final boolean VertexAttributeBufferBindingSupported;
-	
-	/** Requires OpenGL 3.0, which will current min requirement as 3.3, should always be true */
-	@Deprecated
-	public final boolean mapBufferRangeSupported = true;
+	public boolean namedObjectSupported = false; // ~OpenGL 4.5 (UNUSED CURRENTLY)
+	public boolean bufferStorageSupported = false; // ~OpenGL 4.4
+	public boolean VertexAttributeBufferBindingSupported = false; // ~OpenGL 4.3
 	
 	private final GpuUploadMethod preferredUploadMethod;
-	
+
+	public final GLMessage.Builder vanillaDebugMessageBuilder;
+	public final GLMessage.Builder lodBuilderDebugMessageBuilder;
+	public final GLMessage.Builder proxyWorkerDebugMessageBuilder;
+
 	
 	private String getFailedVersionInfo(GLCapabilities c) {
-		StringBuilder str = new StringBuilder("Your supported OpenGL version:\n");
-		
-		str.append("1.1: "+c.OpenGL11+"\n");
-		str.append("1.2: "+c.OpenGL12+"\n");
-		str.append("1.3: "+c.OpenGL13+"\n");
-		str.append("1.4: "+c.OpenGL14+"\n");
-		str.append("1.5: "+c.OpenGL15+"\n");
-		str.append("2.0: "+c.OpenGL20+"\n");
-		str.append("2.1: "+c.OpenGL21+"\n");
-		str.append("3.0: "+c.OpenGL30+"\n");
-		str.append("3.1: "+c.OpenGL31+"\n");
-		str.append("3.2: "+c.OpenGL32+" <- REQUIRED\n");
-		str.append("3.3: "+c.OpenGL33+"\n");
-		str.append("4.0: "+c.OpenGL40+"\n");
-		str.append("4.1: "+c.OpenGL41+"\n");
-		str.append("4.2: "+c.OpenGL42+"\n");
-		str.append("4.3: "+c.OpenGL43+" <- optional improvement\n");
-		str.append("4.4: "+c.OpenGL44+" <- optional improvement\n");
-		str.append("4.5: "+c.OpenGL45+"\n");
-		str.append("4.6: "+c.OpenGL46+"\n");
-		
-		str.append("If you noticed that your computer supports higher OpenGL versions"
+		return "Your OpenGL support:\n" +
+				"openGL version 3.2+: " + c.OpenGL32 + " <- REQUIRED\n" +
+				"Vertex Attribute Buffer Binding: " + (c.glVertexAttribBinding!=0) + " <- optional improvement\n" +
+				"Buffer Storage: " + (c.glBufferStorage!=0) + " <- optional improvement\n" +
+				"If you noticed that your computer supports higher OpenGL versions"
 				+ " but not the required version, try running the game in compatibility mode."
-				+ " (How you turn that on, I have no clue~)");
-		return str.toString();
+				+ " (How you turn that on, I have no clue~)";
 	}
+
+	private boolean checkCapabilities(GLCapabilities c) {
+		if (!c.OpenGL32) {
+			return false;
+		}
+		namedObjectSupported = c.glNamedBufferStorage!=0;
+		bufferStorageSupported = c.glBufferStorage!=0;
+		VertexAttributeBufferBindingSupported = c.glVertexAttribBinding!=0;
+		return true;
+	}
+
 	private String getVersionInfo(GLCapabilities c) {
-		StringBuilder str = new StringBuilder("Your supported OpenGL version:\n");
+		return "Your OpenGL support:\n" +
+				"openGL version 3.2+: " + c.OpenGL32 + " <- REQUIRED\n" +
+				"Vertex Attribute Buffer Binding: " + (c.glVertexAttribBinding!=0) + " <- optional improvement\n" +
+				"Buffer Storage: " + (c.glBufferStorage!=0) + " <- optional improvement\n";
+	}
+	
+	private static void logMessage(GLMessage msg) {
+		GLMessage.Severity s = msg.severity;
+		if (msg.type == GLMessage.Type.ERROR ||
+			msg.type == GLMessage.Type.UNDEFINED_BEHAVIOR) {
+			GL_LOGGER.error("GL ERROR {} from {}: {}", msg.id, msg.source, msg.message);
+			throw new RuntimeException("GL ERROR: "+msg.toString());
+		}
+		RuntimeException e = new RuntimeException("GL MESSAGE: "+msg.toString());
+		switch (s) {
+		case HIGH:
+			GL_LOGGER.error("{}", e);
+			break;
+		case MEDIUM:
+			GL_LOGGER.warn("{}", e);
+			break;
+		case LOW:
+			GL_LOGGER.info("{}", e);
+			break;
+		case NOTIFICATION:
+			GL_LOGGER.debug("{}", e);
+			break;
+		}
 		
-		str.append("1.1: "+c.OpenGL11+"\n");
-		str.append("1.2: "+c.OpenGL12+"\n");
-		str.append("1.3: "+c.OpenGL13+"\n");
-		str.append("1.4: "+c.OpenGL14+"\n");
-		str.append("1.5: "+c.OpenGL15+"\n");
-		str.append("2.0: "+c.OpenGL20+"\n");
-		str.append("2.1: "+c.OpenGL21+"\n");
-		str.append("3.0: "+c.OpenGL30+"\n");
-		str.append("3.1: "+c.OpenGL31+"\n");
-		str.append("3.2: "+c.OpenGL32+" <- REQUIRED\n");
-		str.append("3.3: "+c.OpenGL33+"\n");
-		str.append("4.0: "+c.OpenGL40+"\n");
-		str.append("4.1: "+c.OpenGL41+"\n");
-		str.append("4.2: "+c.OpenGL42+"\n");
-		str.append("4.3: "+c.OpenGL43+" <- optional improvement\n");
-		str.append("4.4: "+c.OpenGL44+" <- optional improvement\n");
-		str.append("4.5: "+c.OpenGL45+"\n");
-		str.append("4.6: "+c.OpenGL46+"\n");
-		return str.toString();
 	}
 	
 	
@@ -161,14 +163,52 @@ public class GLProxy
 	 */
 	private GLProxy()
 	{
+		lodBuilderDebugMessageBuilder = new GLMessage.Builder(
+				(type) -> {
+					if (type == GLMessage.Type.POP_GROUP) return false;
+					if (type == GLMessage.Type.PUSH_GROUP) return false;
+					if (type == GLMessage.Type.MARKER) return false;
+					// if (type == GLMessage.Type.PERFORMANCE) return false;
+					return true;
+				}
+				,(severity) -> {
+					if (severity == GLMessage.Severity.NOTIFICATION) return false;
+					return true;
+				},null
+				);
+		proxyWorkerDebugMessageBuilder = new GLMessage.Builder(
+				(type) -> {
+					if (type == GLMessage.Type.POP_GROUP) return false;
+					if (type == GLMessage.Type.PUSH_GROUP) return false;
+					if (type == GLMessage.Type.MARKER) return false;
+					// if (type == GLMessage.Type.PERFORMANCE) return false;
+					return true;
+				}
+				,(severity) -> {
+					if (severity == GLMessage.Severity.NOTIFICATION) return false;
+					return true;
+				},null
+				);
+		vanillaDebugMessageBuilder = new GLMessage.Builder(
+				(type) -> {
+					if (type == GLMessage.Type.POP_GROUP) return false;
+					if (type == GLMessage.Type.PUSH_GROUP) return false;
+					if (type == GLMessage.Type.MARKER) return false;
+					// if (type == GLMessage.Type.PERFORMANCE) return false;
+					return true;
+				}
+				,(severity) -> {
+			if (severity == GLMessage.Severity.NOTIFICATION) return false;
+			return true;
+		},null
+		);
 		
-		boolean enableDebugLogging = CONFIG.client().advanced().debugging().getDebugMode() == DebugMode.SHOW_DETAIL;
 		
         // this must be created on minecraft's render context to work correctly
-		
-		ClientApi.LOGGER.info("Creating " + GLProxy.class.getSimpleName() + "... If this is the last message you see in the log there must have been a OpenGL error.");
 
-		ClientApi.LOGGER.info("Lod Render OpenGL version [" + GL11.glGetString(GL11.GL_VERSION) + "].");
+		GL_LOGGER.info("Creating " + GLProxy.class.getSimpleName() + "... If this is the last message you see in the log there must have been a OpenGL error.");
+
+		GL_LOGGER.info("Lod Render OpenGL version [" + GL11.glGetString(GL11.GL_VERSION) + "].");
 		
 		// getting Minecraft's context has to be done on the render thread,
 		// where the GL context is
@@ -187,15 +227,19 @@ public class GLProxy
 		if (!minecraftGlCapabilities.OpenGL32)
 		{
 			String supportedVersionInfo = getFailedVersionInfo(minecraftGlCapabilities);
-			
-			// Note: as of MC 1.17 this shouldn't happen since MC
-			// requires OpenGL 3.2, but for older MC version this will warn the player.
+
+			// See full requirement at above.
 			String errorMessage = ModInfo.READABLE_NAME + " was initializing " + GLProxy.class.getSimpleName()
-					+ " and discovered this GPU doesn't support OpenGL 3.2." + " Sorry I couldn't tell you sooner :(\n"+
+					+ " and discovered this GPU doesn't meet the OpenGL requirement." + " Sorry I couldn't tell you sooner :(\n"+
 					"Additional info:\n"+supportedVersionInfo;
-			MC.crashMinecraft(errorMessage, new UnsupportedOperationException("This GPU doesn't support OpenGL 3.2."));
+			MC.crashMinecraft(errorMessage, new UnsupportedOperationException("Distant Horizon OpenGL requirements not met"));
 		}
-		ClientApi.LOGGER.info("minecraftGlCapabilities:\n"+getVersionInfo(minecraftGlCapabilities));
+		GL_LOGGER.info("minecraftGlCapabilities:\n"+getVersionInfo(minecraftGlCapabilities));
+
+		if (OVERWIDE_VANILLA_GL_LOGGER)
+		GLUtil.setupDebugMessageCallback(new PrintStream(new GLMessageOutputStream(GLProxy::logMessage, vanillaDebugMessageBuilder), true));
+
+		GLFW.glfwMakeContextCurrent(0L);
 		
 		// context creation setup
 		GLFW.glfwDefaultWindowHints();
@@ -205,18 +249,37 @@ public class GLProxy
 		// but this can be explicitly set for testing
 //		GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, 4);
 //		GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, 5);
+
+		// DO NOT comment out below 2 lines. It's needed for mac and also for creating forward compatible contexts
+		GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, 3);
+		GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, 2);
+		GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_FORWARD_COMPAT, GLFW.GLFW_TRUE);
+		GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_PROFILE, GLFW.GLFW_OPENGL_CORE_PROFILE);
+		GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_DEBUG_CONTEXT, GLFW.GLFW_TRUE);
 		
 		// create the LodBuilder context
 		lodBuilderGlContext = GLFW.glfwCreateWindow(64, 48, "LOD Builder Window", 0L, minecraftGlContext);
+		if (lodBuilderGlContext == 0) {
+			GL_LOGGER.error("ERROR: Failed to create GLFW context for OpenGL 3.2 with"
+					+ " Forward Compat Core Profile! Your OS may have not been able to support it!");
+			throw new UnsupportedOperationException("Forward Compat Core Profile 3.2 creation failure");
+		}
 		GLFW.glfwMakeContextCurrent(lodBuilderGlContext);
 		lodBuilderGlCapabilities = GL.createCapabilities();
-		ClientApi.LOGGER.info("lodBuilderGlCapabilities:\n"+getVersionInfo(lodBuilderGlCapabilities));
+		GL_LOGGER.info("lodBuilderGlCapabilities:\n"+getVersionInfo(lodBuilderGlCapabilities));
+		GLFW.glfwMakeContextCurrent(0L);
 		
 		// create the proxyWorker's context
 		proxyWorkerGlContext = GLFW.glfwCreateWindow(64, 48, "LOD proxy worker Window", 0L, minecraftGlContext);
+		if (proxyWorkerGlContext == 0) {
+			GL_LOGGER.error("ERROR: Failed to create GLFW context for OpenGL 3.2 with"
+					+ " Forward Compat Core Profile! Your OS may have not been able to support it!");
+			throw new UnsupportedOperationException("Forward Compat Core Profile 3.2 creation failure");
+		}
 		GLFW.glfwMakeContextCurrent(proxyWorkerGlContext);
 		proxyWorkerGlCapabilities = GL.createCapabilities();
-		ClientApi.LOGGER.info("proxyWorkerGlCapabilities:\n"+getVersionInfo(lodBuilderGlCapabilities));
+		GL_LOGGER.info("proxyWorkerGlCapabilities:\n"+getVersionInfo(lodBuilderGlCapabilities));
+		GLFW.glfwMakeContextCurrent(0L);
 
 		// Check if we can use the make-over version of Vertex Attribute, which is available in GL4.3 or after
 		VertexAttributeBufferBindingSupported = minecraftGlCapabilities.glBindVertexBuffer != 0L; // Nullptr
@@ -231,22 +294,8 @@ public class GLProxy
 		//==================================//
 		
 		setGlContext(GLProxyContext.LOD_BUILDER);
-		// TODO: Enable this but disable INFO logging
 
-	    File proxyLog = new File("OpenGL-Lod-ProxyContext.log");
-	    try {
-			proxyLog.createNewFile();
-		} catch (IOException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
-		}
-	    if (enableDebugLogging)
-			try {
-				GLUtil.setupDebugMessageCallback(new PrintStream(proxyLog));
-			} catch (FileNotFoundException e) {
-				// TODO Auto-generated catch block
-				e.printStackTrace();
-			}
+		GLUtil.setupDebugMessageCallback(new PrintStream(new GLMessageOutputStream(GLProxy::logMessage, lodBuilderDebugMessageBuilder), true));
 		
 		// get specific capabilities
 		// Check if we can use the Buffer Storage, which is available in GL4.4 or after
@@ -255,7 +304,7 @@ public class GLProxy
 		// display the capabilities
 		if (!bufferStorageSupported)
 		{
-			ClientApi.LOGGER.warn("This GPU doesn't support Buffer Storage (OpenGL 4.4), falling back to using other methods.");			
+			GL_LOGGER.warn("This GPU doesn't support Buffer Storage (OpenGL 4.4), falling back to using other methods.");
 		}
 		
 		String vendor = GL32.glGetString(GL32.GL_VENDOR).toUpperCase(); // example return: "NVIDIA CORPORATION"
@@ -269,24 +318,12 @@ public class GLProxy
 			// AMD or Intel card
 			preferredUploadMethod = GpuUploadMethod.BUFFER_MAPPING;
 		}
-		
-		ClientApi.LOGGER.info("GPU Vendor [" + vendor + "], Preferred upload method is [" + preferredUploadMethod + "].");
+
+		GL_LOGGER.info("GPU Vendor [" + vendor + "], Preferred upload method is [" + preferredUploadMethod + "].");
 
 		setGlContext(GLProxyContext.PROXY_WORKER);
-	    File workerLog = new File("OpenGL-Lod-WorkerContext.log");
-	    try {
-			workerLog.createNewFile();
-		} catch (IOException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
-		}
-	    if (enableDebugLogging)
-			try {
-				GLUtil.setupDebugMessageCallback(new PrintStream(workerLog));
-			} catch (FileNotFoundException e) {
-				// TODO Auto-generated catch block
-				e.printStackTrace();
-			}
+		
+		GLUtil.setupDebugMessageCallback(new PrintStream(new GLMessageOutputStream(GLProxy::logMessage, proxyWorkerDebugMessageBuilder), true));
 		
 		//==========//
 		// clean up //
@@ -296,7 +333,7 @@ public class GLProxy
         setGlContext(GLProxyContext.MINECRAFT);
 		
 		// GLProxy creation success
-		ClientApi.LOGGER.info(GLProxy.class.getSimpleName() + " creation successful. OpenGL smiles upon you this day.");
+		GL_LOGGER.info(GLProxy.class.getSimpleName() + " creation successful. OpenGL smiles upon you this day.");
 	}
 	
 	/**
@@ -310,8 +347,7 @@ public class GLProxy
 		// we don't have to change the context, we are already there.
 		if (currentContext == newContext)
 			return;
-		
-		
+
 		long contextPointer;
 		GLCapabilities newGlCapabilities = null;
 		
@@ -400,9 +436,10 @@ public class GLProxy
 	 */
 	public void recordOpenGlCall(Runnable renderCall)
 	{
-		workerThread.execute(new Thread(() -> { runnableContainer(renderCall); }));
+		StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
+		workerThread.execute(() -> runnableContainer(renderCall, stackTrace));
 	}
-	private void runnableContainer(Runnable renderCall)
+	private void runnableContainer(Runnable renderCall, StackTraceElement[] stackTrace)
 	{
 		try
 		{
@@ -413,8 +450,9 @@ public class GLProxy
 		}
 		catch (Exception e)
 		{
-			ClientApi.LOGGER.error(Thread.currentThread().getName() + " ran into a issue: " + e.getMessage());
-			e.printStackTrace();
+			RuntimeException error = new RuntimeException("Uncaught Exception during execution:", e);
+			error.setStackTrace(stackTrace);
+			GL_LOGGER.error(Thread.currentThread().getName() + " ran into a issue: ", error);
 		}
 		finally
 		{
@@ -423,31 +461,20 @@ public class GLProxy
 		}
 	}
 	
-	/** 
-	 * If called from a legacy OpenGL context this will
-	 * set the fog end to infinity with a density of 0. 
-	 * Effectively removing the fog.
-	 * <p>
-	 * This only works with Legacy OpenGL because James hasn't
-	 * looking into a way for it to work with Modern OpenGL.
-	 */
-	public boolean disableLegacyFog()
-	{
-		// make sure this is a legacy OpenGL context 
-		if (minecraftGlCapabilities.glFogf != 0)
-		{
-			// glFogf should only have an address if the current OpenGL
-			// context can call it, and it should only be able to call it in
-			// legacy OpenGL contexts; since it is disabled in Modern
-			// OpenGL.
-			
-			GL11.glFogf(GL11.GL_FOG_START, 0.0f);
-			GL11.glFogf(GL11.GL_FOG_END, Float.MAX_VALUE);
-			GL11.glFogf(GL11.GL_FOG_DENSITY, 0.0f);
-			return true;
+	public static void ensureAllGLJobCompleted() { // Uses global logger since it's a cleanup method
+		if (!hasInstance()) return;
+		ApiShared.LOGGER.info("Blocking until GL jobs finished...");
+		try {
+			instance.workerThread.shutdown();
+			boolean worked = instance.workerThread.awaitTermination(30, TimeUnit.SECONDS);
+			if (!worked)
+				ApiShared.LOGGER.error("GLWorkerThread shutdown timed out! Game may crash on exit due to cleanup failure!");
+		} catch (InterruptedException e) {
+			ApiShared.LOGGER.error("GLWorkerThread shutdown is interrupted! Game may crash on exit due to cleanup failure!");
+			e.printStackTrace();
+		} finally {
+			instance.workerThread = Executors.newSingleThreadExecutor(new ThreadFactoryBuilder().setNameFormat(GLProxy.class.getSimpleName() + "-Worker-Thread").build());
 		}
-		return false;
+		ApiShared.LOGGER.info("All GL jobs finished!");
 	}
-	
-	
 }

src/main/java/com/seibel/lod/core/render/LodFogConfig.java

@@ -1,8 +1,8 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
- *    Copyright (C) 2020  James Seibel
+ *    Copyright (C) 2020-2022  James Seibel
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
@@ -19,57 +19,415 @@
 
 package com.seibel.lod.core.render;
 
-import com.seibel.lod.core.enums.rendering.FogDistance;
-import com.seibel.lod.core.enums.rendering.FogDrawMode;
+import com.seibel.lod.core.enums.rendering.*;
 import com.seibel.lod.core.handlers.IReflectionHandler;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
+import com.seibel.lod.core.render.objects.Shader;
 import com.seibel.lod.core.wrapperInterfaces.config.ILodConfigWrapperSingleton;
 
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+import static com.seibel.lod.core.render.GLProxy.GL_LOGGER;
+
 /**
- * This object is just a replacement for an array
- * to make things easier to understand in the LodRenderer.
- * 
+ * This holds fog related settings and
+ * creates the fog related shader code.
+ *
+ * @author Leetom
  * @author James Seibel
- * @version 11-26-2021
+ * @version 2022-4-14
  */
 public class LodFogConfig
 {
-	public FogDrawMode fogDrawMode;
-	public FogDistance fogDistance;
+	private static final IReflectionHandler REFLECTION_HANDLER = SingletonHandler.get(IReflectionHandler.class);
+	private static final ILodConfigWrapperSingleton CONFIG = SingletonHandler.get(ILodConfigWrapperSingleton.class);
 	
-	public float nearFogStart = 0;
-	public float nearFogEnd = 0;
+	public static final boolean DEBUG_DUMP_GENERATED_CODE = false;
 	
-	public float farFogStart = 0;
-	public float farFogEnd = 0;
+	public final FogSetting farFogSetting;
+	public final FogSetting heightFogSetting;
+	public final HeightFogMixMode heightFogMixMode;
+	public final HeightFogMode heightFogMode;
+	public final float heightFogHeight;
 	
-	public LodFogConfig(ILodConfigWrapperSingleton config, IReflectionHandler reflectionHandler, int farPlaneBlockDistance, int vanillaBlockRenderedDistance) {
-		
-		fogDrawMode = config.client().graphics().fogQuality().getFogDrawMode();
-		if (fogDrawMode == FogDrawMode.USE_OPTIFINE_SETTING)
-			fogDrawMode = reflectionHandler.getFogDrawMode();
-		
-		// how different distances are drawn depends on the quality set
-		fogDistance = config.client().graphics().fogQuality().getFogDistance();
-		
-		// far fog //
-		
-		if (config.client().graphics().fogQuality().getFogDistance() == FogDistance.NEAR_AND_FAR)
-			farFogStart = farPlaneBlockDistance * 0.9f;
-		else
-			// for more realistic fog when using FAR
-			farFogStart = Math.min(vanillaBlockRenderedDistance * 1.5f, farPlaneBlockDistance * 0.9f);
-		
-		farFogEnd = farPlaneBlockDistance;
+	final boolean drawNearFog;
+
+	final int earthCurveRatio; // FIXME: Move this out of here
+
 	
+	public static LodFogConfig generateFogConfig()
+	{
+		FogDrawMode fogMode = CONFIG.client().graphics().fogQuality().getFogDrawMode();
+		if (fogMode == FogDrawMode.USE_OPTIFINE_SETTING)
+			fogMode = REFLECTION_HANDLER.getFogDrawMode();
 		
-		// near fog //
-		
-		// the reason that I wrote fogEnd then fogStart backwards
-		// is because we are using fog backwards to how
-		// it is normally used, hiding near objects
-		// instead of far objects.
-		nearFogEnd = vanillaBlockRenderedDistance * 1.41f;
-		nearFogStart = vanillaBlockRenderedDistance * 1.6f;
+		return new LodFogConfig(fogMode);
 	}
 	
+	/** sets all fog options from the config */
+	private LodFogConfig(FogDrawMode fogDrawMode)
+	{
+		earthCurveRatio = CONFIG.client().graphics().advancedGraphics().getEarthCurveRatio(); //FIXME: Move this out of here
+
+		if (fogDrawMode != FogDrawMode.FOG_DISABLED)
+		{
+			ILodConfigWrapperSingleton.IClient.IGraphics.IFogQuality fogSettings = CONFIG.client().graphics().fogQuality();
+			
+			FogDistance fogDistance = fogSettings.getFogDistance();
+			drawNearFog = (fogDistance == FogDistance.NEAR || fogDistance == FogDistance.NEAR_AND_FAR);
+			
+			if (fogDistance == FogDistance.FAR || fogDistance == FogDistance.NEAR_AND_FAR)
+			{
+				// far fog should be drawn
+				
+				farFogSetting = fogSettings.advancedFog().computeFarFogSetting();
+				
+				heightFogMixMode = fogSettings.advancedFog().heightFog().getHeightFogMixMode();
+				if (heightFogMixMode == HeightFogMixMode.IGNORE_HEIGHT || heightFogMixMode == HeightFogMixMode.BASIC)
+				{
+					// basic fog mixing
+					
+					heightFogSetting = null;
+					heightFogMode = null;
+					heightFogHeight = 0.f;
+				}
+				else
+				{
+					// advanced fog mixing
+					
+					heightFogSetting = fogSettings.advancedFog().heightFog().computeHeightFogSetting();
+					heightFogMode = fogSettings.advancedFog().heightFog().getHeightFogMode();
+					
+					if (heightFogMode.basedOnCamera)
+					{
+						heightFogHeight = 0.f;
+					}
+					else
+					{
+						heightFogHeight = (float) fogSettings.advancedFog().heightFog().getHeightFogHeight();
+					}
+				}
+			}
+			else
+			{
+				// far fog should not be drawn
+				
+				farFogSetting = null;
+				heightFogSetting = null;
+				heightFogMode = null;
+				heightFogMixMode = null;
+				heightFogHeight = 0.f;
+			}
+		}
+		else
+		{
+			// fog disabled
+			
+			drawNearFog = false;
+			farFogSetting = null;
+			heightFogMixMode = null;
+			heightFogMode = null;
+			heightFogSetting = null;
+			heightFogHeight = 0.f;
+		}
+	}
+	
+	public StringBuilder loadAndProcessFragShader(String path, boolean absoluteFilePath)
+	{
+		StringBuilder str = makeRuntimeDefine();
+		generateRuntimeShaderCode(Shader.loadFile(path, absoluteFilePath, str));
+		if (DEBUG_DUMP_GENERATED_CODE)
+		{
+			try (FileOutputStream file = new FileOutputStream("debugGenerated.frag", false))
+			{
+				file.write(str.toString().getBytes(StandardCharsets.UTF_8));
+				GL_LOGGER.info("Debug dumped generated code to debugGenerated.frag for {}", path);
+			}
+			catch (IOException e)
+			{
+				GL_LOGGER.warn("Failed to debug dump generated code to file for {}", path);
+			}
+		}
+		return str;
+	}
+	
+	/** Generates the necessary constants for a fragment shader */
+	private void generateRuntimeShaderCode(StringBuilder str)
+	{
+		str.append("// =======RUNTIME GENERATED CODE SECTION======== //\n");
+		
+		// Generate method: float getNearFogThickness(float dist);
+		str.append("" +
+			"float getNearFogThickness(float dist) \n" +
+			"{ \n" +
+			"	return linearFog(dist, nearFogStart, nearFogLength, 0.0, 1.0); \n" +
+			"} \n");
+		
+		
+		if (farFogSetting == null)
+		{
+			str.append("\n" +
+				"float getFarFogThickness(float dist) { return 0.0; } \n" +
+				"float getHeightFogThickness(float dist) { return 0.0; } \n" +
+				"float calculateFarFogDepth(float horizontal, float dist, float nearFogStart) { return 0.0; } \n" +
+				"float calculateHeightFogDepth(float vertical, float realY) { return 0.0; } \n" +
+				"float mixFogThickness(float near, float far, float height) \n" +
+				"{ \n" +
+					(drawNearFog ? "return 1.0-near;" : "return 0.0;") +
+				"} \n\n");
+		}
+		else
+		{
+			// Generate method: float getFarFogThickness(float dist);
+			str.append("" +
+				"float getFarFogThickness(float dist) \n" +
+				"{ \n" +
+					getFarFogMethod(farFogSetting.fogType) + "\n" +
+				"} \n");
+			
+			
+			// Generate method: float getHeightFogThickness(float dist);
+			str.append("" +
+				"float getHeightFogThickness(float dist) \n" +
+				"{ \n"+
+					(heightFogSetting != null ? getHeightFogMethod(heightFogSetting.fogType) : "	return 0.0;") + "\n" +
+				"} \n");
+			
+			
+			// Generate method: float calculateHeightFogDepth(float vertical, float realY);
+			str.append("" +
+				"float calculateHeightFogDepth(float vertical, float realY) \n" +
+				"{ \n" +
+					(heightFogSetting != null ? getHeightDepthMethod(heightFogMode, heightFogHeight) : "	return 0.0;") + "\n" +
+				"} \n");
+			
+			
+			// Generate method: calculateFarFogDepth(float horizontal, float dist, float nearFogStart);
+			str.append("" +
+				"float calculateFarFogDepth(float horizontal, float dist, float nearFogStart) \n" +
+				"{ \n" +
+				"	return " + (heightFogMixMode == HeightFogMixMode.BASIC ?
+								"(dist - nearFogStart)/(1.0 - nearFogStart);" :
+								"(horizontal - nearFogStart)/(1.0 - nearFogStart);") +
+				"} \n");
+			
+			// Generate method: float mixFogThickness(float near, float far, float height);
+			str.append("" +
+				"float mixFogThickness(float near, float far, float height) \n" +
+				"{ \n" +
+					getMixFogLine(heightFogMixMode, drawNearFog) + "\n" +
+				"} \n");
+		}
+	}
+	
+	
+	
+	//=================//
+	// shader creation //
+	// helper methods  //
+	//=================//
+	
+	private StringBuilder makeRuntimeDefine()
+	{
+		StringBuilder str = new StringBuilder();
+		str.append("// =======RUNTIME GENERATED DEFINE SECTION======== //\n");
+		str.append("#version 150 core\n");
+		
+		FogSetting activeFarFogSetting = this.farFogSetting != null ? this.farFogSetting : FogSetting.EMPTY;
+		FogSetting activeHeightFogSetting = this.heightFogSetting != null ? this.heightFogSetting : FogSetting.EMPTY;
+		
+		str.append("\n" +
+			"#define farFogStart " + activeFarFogSetting.start + "\n" +
+			"#define farFogLength " + (activeFarFogSetting.end - activeFarFogSetting.start) + "\n" +
+			"#define farFogMin " + activeFarFogSetting.min + "\n" +
+			"#define farFogRange " + (activeFarFogSetting.max - activeFarFogSetting.min) + "\n" +
+			"#define farFogDensity " + activeFarFogSetting.density + "\n" +
+			"\n" +
+			"#define heightFogStart " + activeHeightFogSetting.start + "\n" +
+			"#define heightFogLength " + (activeHeightFogSetting.end - activeHeightFogSetting.start) + "\n" +
+			"#define heightFogMin " + activeHeightFogSetting.min + "\n" +
+			"#define heightFogRange " + (activeHeightFogSetting.max - activeHeightFogSetting.min) + "\n" +
+			"#define heightFogDensity " + activeHeightFogSetting.density + "\n" +
+			"\n");
+		
+		str.append("// =======RUNTIME END======== //\n");
+		return str;
+	}
+	
+	private static String getFarFogMethod(FogSetting.FogType fogType)
+	{
+		switch (fogType)
+		{
+		case LINEAR:
+			return "return linearFog(dist, farFogStart, farFogLength, farFogMin, farFogRange);\n";
+		case EXPONENTIAL:
+			return "return exponentialFog(dist, farFogStart, farFogLength, farFogMin, farFogRange, farFogDensity);\n";
+		case EXPONENTIAL_SQUARED:
+			return "return exponentialSquaredFog(dist, farFogStart, farFogLength, farFogMin, farFogRange, farFogDensity);\n";
+		
+		default:
+			throw new IllegalArgumentException("FogType [" + fogType + "] not implemented for [getFarFogMethod].");
+		}
+	}
+	
+	private static String getHeightDepthMethod(HeightFogMode heightMode, float heightFogHeight)
+	{
+		String str = "";
+		if (!heightMode.basedOnCamera)
+		{
+			str =  "	vertical = realY - (" + heightFogHeight + ");\n";
+		}
+		
+		if (heightMode.below && heightMode.above)
+		{
+			str += "	return abs(vertical);\n";
+		}
+		else if (heightMode.below)
+		{
+			str += "	return -vertical;\n";
+		}
+		else if (heightMode.above)
+		{
+			str += "	return vertical;\n";
+		}
+		else
+		{
+			str += "	return 0;\n";
+		}
+		return str;
+	}
+	
+	/**
+	 * Returns the method call for the given fog type. <br>
+	 * Example: <br>
+	 * <code>"	return linearFog(dist, heightFogStart, heightFogLength, heightFogMin, heightFogRange);"</code>
+	 */
+	private static String getHeightFogMethod(FogSetting.FogType fogType)
+	{
+		switch (fogType)
+		{
+		case LINEAR:
+			return "	return linearFog(dist, heightFogStart, heightFogLength, heightFogMin, heightFogRange);\n";
+		case EXPONENTIAL:
+			return "	return exponentialFog(dist, heightFogStart, heightFogLength, heightFogMin, heightFogRange, heightFogDensity);\n";
+		case EXPONENTIAL_SQUARED:
+			return "	return exponentialSquaredFog(dist, heightFogStart, heightFogLength, heightFogMin, heightFogRange, heightFogDensity);\n";
+		
+		default:
+			throw new IllegalArgumentException("FogType [" + fogType + "] not implemented for [getHeightFogMethod].");
+		}
+	}
+	
+	/**
+	 * creates a line in the format <br>
+	 * <code>"	return max(1.0-near, far);" </code>
+	 */
+	private static String getMixFogLine(HeightFogMixMode heightFogMode, boolean drawNearFog)
+	{
+		String str = "	return ";
+		
+		switch (heightFogMode)
+		{
+		case BASIC:
+		case IGNORE_HEIGHT:
+			if (drawNearFog)
+				str += "max(1.0-near, far);\n";
+			else
+				str += "near * far;\n";
+			break;
+		
+		case ADDITION:
+			if (drawNearFog)
+				str += "max(1.0-near, far + height);\n";
+			else
+				str += "near * (far + height);\n";
+			break;
+		
+		case MAX:
+			if (drawNearFog)
+				str += "max(1.0-near, max(far, height));\n";
+			else
+				str += "near * max(far, height);\n";
+			break;
+		
+		case INVERSE_MULTIPLY:
+			if (drawNearFog)
+				str += "max(1.0-near, 1.0 - (1.0-far)*(1.0-height));\n";
+			else
+				str += "near * (1.0 - (1.0-far)*(1.0-height));\n";
+			break;
+		
+		case MULTIPLY:
+			if (drawNearFog)
+				str += "max(1.0-near, far*height);\n";
+			else
+				str += "near * far * height;\n";
+			break;
+		
+		case LIMITED_ADDITION:
+			if (drawNearFog)
+				str += "max(1.0-near, far + max(far, height));\n";
+			else
+				str += "near * (far + max(far, height));\n";
+			break;
+		
+		case MULTIPLY_ADDITION:
+			if (drawNearFog)
+				str += "max(1.0-near, far + far*height);\n";
+			else
+				str += "near * (far + far*height);\n";
+			break;
+		
+		case INVERSE_MULTIPLY_ADDITION:
+			if (drawNearFog)
+				str += "max(1.0-near, far + 1.0 - (1.0-far)*(1.0-height));\n";
+			else
+				str += "near * (far + 1.0 - (1.0-far)*(1.0-height));\n";
+			break;
+		
+		case AVERAGE:
+			if (drawNearFog)
+				str += "max(1.0-near, far*0.5 + height*0.5);\n";
+			else
+				str += "near * (far*0.5 + height*0.5);\n";
+			break;
+		
+		default:
+			throw new IllegalArgumentException("FogType [" + heightFogMode + "] not implemented for [getMixFogMethod].");
+		}
+		
+		return str;
+	}
+	
+	
+	
+	
+	
+	
+	//========================//
+	// default object methods //
+	//========================//
+	
+	@Override
+	public boolean equals(Object o)
+	{
+		if (this == o)
+			return true;
+		if (o == null || getClass() != o.getClass())
+			return false;
+		LodFogConfig that = (LodFogConfig) o;
+		return Float.compare(that.heightFogHeight, heightFogHeight) == 0 &&
+				drawNearFog == that.drawNearFog && Objects.equals(farFogSetting, that.farFogSetting) &&
+				Objects.equals(heightFogSetting, that.heightFogSetting) && heightFogMixMode == that.heightFogMixMode &&
+				heightFogMode == that.heightFogMode && earthCurveRatio == that.earthCurveRatio;
+	}
+	
+	@Override
+	public int hashCode()
+	{
+		return Objects.hash(farFogSetting, heightFogSetting, heightFogMixMode, heightFogMode, heightFogHeight, drawNearFog, earthCurveRatio);
+	}
 }

src/main/java/com/seibel/lod/core/render/LodRenderProgram.java

@@ -1,5 +1,5 @@
 /*
- *    This file is part of the Distant Horizon mod (formerly the LOD Mod),
+ *    This file is part of the Distant Horizons mod (formerly the LOD Mod),
  *    licensed under the GNU GPL v3 License.
  *
  *    Copyright (C) 2021  James Seibel
@@ -21,82 +21,94 @@ package com.seibel.lod.core.render;
 
 import java.awt.Color;
 
-import com.seibel.lod.core.enums.rendering.FogDistance;
-import com.seibel.lod.core.enums.rendering.FogDrawMode;
+import com.seibel.lod.core.handlers.dependencyInjection.SingletonHandler;
 import com.seibel.lod.core.objects.math.Mat4f;
 import com.seibel.lod.core.objects.math.Vec3f;
-import com.seibel.lod.core.render.objects.ShaderProgram;
-import com.seibel.lod.core.render.objects.VertexAttribute;
-import com.seibel.lod.core.render.objects.VertexAttributePostGL43;
-import com.seibel.lod.core.render.objects.VertexAttributePreGL43;
+import com.seibel.lod.core.render.objects.*;
 import com.seibel.lod.core.util.LodUtil;
+import com.seibel.lod.core.wrapperInterfaces.IVersionConstants;
 
 public class LodRenderProgram extends ShaderProgram {
 	public static final String VERTEX_SHADER_PATH = "shaders/standard.vert";
+	public static final String VERTEX_CURVE_SHADER_PATH = "shaders/curve.vert";
 	public static final String FRAGMENT_SHADER_PATH = "shaders/flat_shaded.frag";
+	private static final IVersionConstants VERSION_CONSTANTS = SingletonHandler.get(IVersionConstants.class);
 	
 	public final VertexAttribute vao;
-	
-	// Attributes
-	public final int posAttrib;
-	public final int colAttrib;
-	public final int blockSkyLightAttrib;
-	public final int blockLightAttrib;
+
 	// Uniforms
-	public final int mvmUniform;
-	public final int projUniform;
-	public final int cameraUniform;
-	public final int fogColorUniform;
-	// public final int skyLightUniform; worldSkyLight is currently not used
+	public final int combinedMatUniform;
+	public final int modelOffsetUniform;
+	public final int worldYOffsetUniform;
+
+	public final int mircoOffsetUniform;
+
+	public final int earthRadiusUniform;
+
 	public final int lightMapUniform;
 	// Fog Uniforms
-	public final int fogEnabledUniform;
-	public final int nearFogEnabledUniform;
-	public final int farFogEnabledUniform;
+	public final int fogColorUniform;
+	public final int fogScaleUniform;
+	public final int fogVerticalScaleUniform;
 	public final int nearFogStartUniform;
-	public final int nearFogEndUniform;
-	public final int farFogStartUniform;
-	public final int farFogEndUniform;
+	public final int nearFogLengthUniform;;
+	public final int fullFogModeUniform;
+
+	public final LodFogConfig fogConfig;
 
 	// This will bind  VertexAttribute
-	public LodRenderProgram() {
-		super(VERTEX_SHADER_PATH, FRAGMENT_SHADER_PATH, "fragColor");
-		
-        posAttrib = getAttributeLocation("vPosition");
-        colAttrib = getAttributeLocation("color");
-        blockSkyLightAttrib = getAttributeLocation("blockSkyLight");
-        blockLightAttrib = getAttributeLocation("blockLight");
-        
-        mvmUniform = getUniformLocation("modelViewMatrix");
-		projUniform = getUniformLocation("projectionMatrix");
-		cameraUniform = getUniformLocation("cameraPos");
-		fogColorUniform = getUniformLocation("fogColor");
-		// skyLightUniform = getUniformLocation("worldSkyLight");
+	public LodRenderProgram(LodFogConfig fogConfig) {
+		super(() -> Shader.loadFile(fogConfig.earthCurveRatio!=0 ? VERTEX_CURVE_SHADER_PATH : VERTEX_SHADER_PATH,
+						false, new StringBuilder()).toString(),
+				() -> fogConfig.loadAndProcessFragShader(FRAGMENT_SHADER_PATH, false).toString(),
+				"fragColor", new String[] { "vPosition", "color" });
+		this.fogConfig = fogConfig;
+
+		combinedMatUniform = getUniformLocation("combinedMatrix");
+		modelOffsetUniform = getUniformLocation("modelOffset");
+		worldYOffsetUniform = tryGetUniformLocation("worldYOffset");
+		mircoOffsetUniform = getUniformLocation("mircoOffset");
+		earthRadiusUniform = tryGetUniformLocation("earthRadius");
+
 		lightMapUniform = getUniformLocation("lightMap");
 
 		// Fog uniforms
-		fogEnabledUniform = getUniformLocation("fogEnabled");
-		nearFogEnabledUniform = getUniformLocation("nearFogEnabled");
-		farFogEnabledUniform = getUniformLocation("farFogEnabled");
+		fullFogModeUniform = getUniformLocation("fullFogMode");
+		fogColorUniform = getUniformLocation("fogColor");
+		fogScaleUniform = tryGetUniformLocation("fogScale");
+		fogVerticalScaleUniform = tryGetUniformLocation("fogVerticalScale");
 		// near
-		nearFogStartUniform = getUniformLocation("nearFogStart");
-		nearFogEndUniform = getUniformLocation("nearFogEnd");
-		// far
-		farFogStartUniform = getUniformLocation("farFogStart");
-		farFogEndUniform = getUniformLocation("farFogEnd");
-		
+		nearFogStartUniform = tryGetUniformLocation("nearFogStart");
+		nearFogLengthUniform = tryGetUniformLocation("nearFogLength");
+
 		// TODO: Add better use of the LODFormat thing
 		int vertexByteCount = LodUtil.LOD_VERTEX_FORMAT.getByteSize();
 		if (GLProxy.getInstance().VertexAttributeBufferBindingSupported)
 			vao = new VertexAttributePostGL43(); // also binds VertexAttribute
 		else
 			vao = new VertexAttributePreGL43(); // also binds VertexAttribute
-		//vao.bind();
-		vao.setVertexAttribute(0, posAttrib, VertexAttribute.VertexPointer.addVec3Pointer(false));
-		vao.setVertexAttribute(0, colAttrib, VertexAttribute.VertexPointer.addUnsignedBytesPointer(4, true));
-		vao.setVertexAttribute(0, blockSkyLightAttrib, VertexAttribute.VertexPointer.addUnsignedBytePointer(false));
-		vao.setVertexAttribute(0, blockLightAttrib, VertexAttribute.VertexPointer.addUnsignedBytePointer(false));
+		vao.bind();
+		// Now a pos+light.
+		vao.setVertexAttribute(0, 0, VertexAttribute.VertexPointer.addUnsignedShortsPointer(4, false, true)); // 2+2+2+2
+		//vao.setVertexAttribute(0, posAttrib, VertexAttribute.VertexPointer.addVec3Pointer(false)); // 4+4+4
+		vao.setVertexAttribute(0, 1, VertexAttribute.VertexPointer.addUnsignedBytesPointer(4, true, false)); // +4
+		//vao.setVertexAttribute(0, lightAttrib, VertexAttribute.VertexPointer.addUnsignedBytesPointer(2, false)); // +4 due to how it aligns
+		try {
 		vao.completeAndCheck(vertexByteCount);
+		} catch (RuntimeException e) {
+			System.out.println(LodUtil.LOD_VERTEX_FORMAT);
+			throw e;
+		}
+
+		if (earthRadiusUniform != -1) setUniform(earthRadiusUniform,
+				/*6371KM*/ 6371000.0f / fogConfig.earthCurveRatio);
+	}
+
+	// If not usable, return a new LodFogConfig to be constructed
+	public LodFogConfig isShaderUsable() {
+		LodFogConfig newConfig = LodFogConfig.generateFogConfig();
+		if (fogConfig.equals(newConfig)) return null;
+		return newConfig;
 	}
 	
 	// Override ShaderProgram.bind()
@@ -124,32 +136,34 @@ public class LodRenderProgram extends ShaderProgram {
 		vao.unbindBuffersFromAllBindingPoint();
 	}
 	
-	public void fillUniformData(Mat4f modelViewMatrix, Mat4f projectionMatrix, Vec3f cameraPos, Color fogColor, int skyLight, int lightmapBindPoint) {
+	public void fillUniformData(Mat4f combinedMatrix, Color fogColor,
+								int lightmapBindPoint, int worldHeight, int worldYOffset, int lodDrawDistance,
+								int vanillaDrawDistance, boolean fullFogMode) {
         super.bind();
+		vanillaDrawDistance += 32; // Give it a 2 chunk boundary for near fog.
 		// uniforms
-        setUniform(mvmUniform, modelViewMatrix);
-		setUniform(projUniform, projectionMatrix);
-		setUniform(cameraUniform, cameraPos);
-		setUniform(fogColorUniform, fogColor);
+		setUniform(combinedMatUniform, combinedMatrix);
+		setUniform(mircoOffsetUniform, 0.01f); // 0.01 block offset
+
 		// setUniform(skyLightUniform, skyLight);
 		setUniform(lightMapUniform, lightmapBindPoint);
+
+		if (worldYOffsetUniform != -1) setUniform(worldYOffsetUniform, (float)worldYOffset);
+
+		// Fog
+		setUniform(fullFogModeUniform, fullFogMode ? 1 : 0);
+		setUniform(fogColorUniform, fogColor);
+
+		float nearFogLen = vanillaDrawDistance * 0.2f / lodDrawDistance;
+		float nearFogStart = vanillaDrawDistance * (VERSION_CONSTANTS.isVanillaRenderedChunkSquare() ? (float)Math.sqrt(2.) : 1.f) / lodDrawDistance;
+		if (nearFogStartUniform != -1) setUniform(nearFogStartUniform, nearFogStart);
+		if (nearFogLengthUniform != -1) setUniform(nearFogLengthUniform, nearFogLen);
+		if (fogScaleUniform != -1) setUniform(fogScaleUniform, 1.f/lodDrawDistance);
+		if (fogVerticalScaleUniform != -1) setUniform(fogVerticalScaleUniform, 1.f/worldHeight);
 	}
-	
-	public void fillUniformDataForFog(LodFogConfig fogSettings) {
-		super.bind();
-		if (fogSettings.fogDrawMode != FogDrawMode.FOG_DISABLED) {
-			setUniform(fogEnabledUniform, true);
-			setUniform(nearFogEnabledUniform, fogSettings.fogDistance != FogDistance.FAR);
-			setUniform(farFogEnabledUniform, fogSettings.fogDistance != FogDistance.NEAR);
-			// near
-			setUniform(nearFogStartUniform, fogSettings.nearFogStart);
-			setUniform(nearFogEndUniform, fogSettings.nearFogEnd);
-			// far
-			setUniform(farFogStartUniform, fogSettings.farFogStart);
-			setUniform(farFogEndUniform, fogSettings.farFogEnd);
-		} else {
-			setUniform(fogEnabledUniform, false);
-		}
+
+	public void setModelPos(Vec3f modelPos) {
+		setUniform(modelOffsetUniform, modelPos);
 	}
 
 }