Added pre-generated chunk loading

src/main/java/com/seibel/lod/builders/worldGeneration/LodNodeGenWorker.java

@@ -32,6 +32,7 @@ import com.seibel.lod.builders.lodBuilding.LodBuilder;
 import com.seibel.lod.builders.lodBuilding.LodBuilderConfig;
 import com.seibel.lod.config.LodConfig;
 import com.seibel.lod.enums.DistanceGenerationMode;
+import com.seibel.lod.handlers.ChunkLoader;
 import com.seibel.lod.objects.LodDimension;
 import com.seibel.lod.proxy.ClientProxy;
 import com.seibel.lod.util.LodUtil;
@@ -183,29 +184,36 @@ public class LodNodeGenWorker implements IWorker
 				if (lodDim.regionIsInRange(pos.x / LodUtil.REGION_WIDTH_IN_CHUNKS, pos.z / LodUtil.REGION_WIDTH_IN_CHUNKS))
 				{
 //					long startTime = System.currentTimeMillis();
-					
-					switch (generationMode)
+					IChunk loadedChunk = ChunkLoader.getChunkFromFile(pos);
+					if(loadedChunk == null)
 					{
-					case NONE:
-						// don't generate
-						break;
-					case BIOME_ONLY:
-					case BIOME_ONLY_SIMULATE_HEIGHT:
-						// fastest
-						generateUsingBiomesOnly();
-						break;
-					case SURFACE:
-						// faster
-						generateUsingSurface();
-						break;
-					case FEATURES:
-						// fast
-						generateUsingFeatures();
-						break;
-					case SERVER:
-						// very slow
-						generateWithServer();
-						break;
+						switch (generationMode)
+						{
+						case NONE:
+							// don't generate
+							break;
+						case BIOME_ONLY:
+						case BIOME_ONLY_SIMULATE_HEIGHT:
+							// fastest
+							generateUsingBiomesOnly();
+							break;
+						case SURFACE:
+							// faster
+							generateUsingSurface();
+							break;
+						case FEATURES:
+							// fast
+							generateUsingFeatures();
+							break;
+						case SERVER:
+							// very slow
+							generateWithServer();
+							break;
+						}
+					}
+					else
+					{
+						lodBuilder.generateLodNodeFromChunk(lodDim, loadedChunk, new LodBuilderConfig(DistanceGenerationMode.SERVER));
 					}
 					
 					//lodRenderer.regenerateLODsNextFrame();

src/main/java/com/seibel/lod/handlers/ChunkLoader.java

@@ -0,0 +1,48 @@
+package com.seibel.lod.handlers;
+
+import com.seibel.lod.util.LodUtil;
+import com.seibel.lod.wrappers.MinecraftWrapper;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.nbt.CompoundNBT;
+import net.minecraft.util.datafix.DataFixesManager;
+import net.minecraft.util.math.ChunkPos;
+import net.minecraft.world.chunk.IChunk;
+import net.minecraft.world.chunk.storage.ChunkSerializer;
+import net.minecraft.world.server.ServerWorld;
+
+import java.io.File;
+
+public class ChunkLoader
+{
+	public static IChunk getChunkFromFile(ChunkPos pos){
+		
+		ClientWorld clientWorld = MinecraftWrapper.INSTANCE.getClientWorld();
+		if (clientWorld == null)
+			return null;
+		ServerWorld serverWorld = LodUtil.getServerWorldFromDimension(clientWorld.dimensionType());
+		try
+		{
+			IChunk loadedChunk = ChunkSerializer.read(
+					serverWorld,
+					serverWorld.getStructureManager(),
+					serverWorld.getPoiManager(),
+					pos,
+					serverWorld.getChunkSource().chunkMap.read(pos)
+			);
+			boolean emptyChunk = true;
+			for(int i = 0; i < 16; i++){
+				for(int j = 0; j < 16; j++){
+					emptyChunk &= loadedChunk.isYSpaceEmpty(i,j);
+				}
+			}
+			if(emptyChunk)
+				return null;
+			else
+				return loadedChunk;
+		}
+		catch (Exception e)
+		{
+			return null;
+		}
+	}
+}