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distant-horizons-sharded/src/main/java/com/seibel/lod/render/LodRenderer.java
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/*
* 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.render;
import java.util.HashSet;
import org.lwjgl.opengl.GL15;
import org.lwjgl.opengl.GL15C;
import org.lwjgl.opengl.NVFogDistance;
import com.mojang.blaze3d.matrix.MatrixStack;
import com.mojang.blaze3d.platform.GlStateManager;
import com.mojang.blaze3d.systems.RenderSystem;
import com.seibel.lod.builders.bufferBuilding.LodBufferBuilder;
import com.seibel.lod.builders.bufferBuilding.LodBufferBuilder.VertexBuffersAndOffset;
import com.seibel.lod.config.LodConfig;
import com.seibel.lod.enums.DebugMode;
import com.seibel.lod.enums.FogDistance;
import com.seibel.lod.enums.FogDrawOverride;
import com.seibel.lod.enums.FogQuality;
import com.seibel.lod.enums.GpuUploadMethod;
import com.seibel.lod.handlers.ReflectionHandler;
import com.seibel.lod.objects.LodDimension;
import com.seibel.lod.objects.NearFarFogSettings;
import com.seibel.lod.objects.RegionPos;
import com.seibel.lod.proxy.ClientProxy;
import com.seibel.lod.proxy.GlProxy;
import com.seibel.lod.util.DetailDistanceUtil;
import com.seibel.lod.util.LevelPosUtil;
import com.seibel.lod.util.LodUtil;
import com.seibel.lod.wrappers.MinecraftWrapper;
import net.minecraft.client.renderer.ActiveRenderInfo;
import net.minecraft.client.renderer.GameRenderer;
import net.minecraft.client.renderer.texture.NativeImage;
import net.minecraft.client.renderer.vertex.VertexBuffer;
import net.minecraft.potion.Effects;
import net.minecraft.profiler.IProfiler;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.ChunkPos;
import net.minecraft.util.math.vector.Matrix4f;
import net.minecraft.util.math.vector.Vector3d;
/**
* This is where all the magic happens. <br>
* This is where LODs are draw to the world.
*
* @author James Seibel
* @version 10-24-2021
*/
public class LodRenderer
{
/**
* this is the light used when rendering the LODs,
* it should be something different from what is used by Minecraft
*/
private static final int LOD_GL_LIGHT_NUMBER = GL15.GL_LIGHT2;
/**
* If true the LODs colors will be replaced with
* a checkerboard, this can be used for debugging.
*/
public DebugMode previousDebugMode = DebugMode.OFF;
private final MinecraftWrapper mc;
private final GameRenderer gameRender;
private IProfiler profiler;
private int farPlaneBlockDistance;
/** This is used to generate the buildable buffers */
private final LodBufferBuilder lodBufferBuilder;
/** Each VertexBuffer represents 1 region */
private VertexBuffer[][][] vbos;
/**
* the OpenGL IDs for the vbos of the same indices.
* These have to be separate because we can't override the
* buffers in the VBOs (and we don't want to)
*/
private int[][][] storageBufferIds;
private ChunkPos vbosCenter = new ChunkPos(0, 0);
/** This is used to determine if the LODs should be regenerated */
private int[] previousPos = new int[] { 0, 0, 0 };
public NativeImage lightMap = null;
public NativeImage lastLightMap = null;
// these variables are used to determine if the buffers should be rebuilt
private float prevSkyBrightness = 0;
private double prevBrightness = 0;
private int prevRenderDistance = 0;
private long prevPlayerPosTime = 0;
private long prevVanillaChunkTime = 0;
private long prevChunkTime = 0;
/** This is used to determine if the LODs should be regenerated */
private FogDistance prevFogDistance = FogDistance.NEAR_AND_FAR;
/**
* if this is true the LOD buffers should be regenerated,
* provided they aren't already being regenerated.
*/
private volatile boolean partialRegen = false;
private volatile boolean fullRegen = true;
/**
* This HashSet contains every chunk that Vanilla Minecraft
* is going to render
*/
public boolean[][] vanillaRenderedChunks;
public boolean vanillaRenderedChunksChanged;
public boolean vanillaRenderedChunksEmptySkip = false;
public int vanillaBlockRenderedDistance;
public LodRenderer(LodBufferBuilder newLodNodeBufferBuilder)
{
mc = MinecraftWrapper.INSTANCE;
gameRender = mc.getGameRenderer();
lodBufferBuilder = newLodNodeBufferBuilder;
}
/**
* Besides drawing the LODs this method also starts
* the async process of generating the Buffers that hold those LODs.
* @param lodDim The dimension to draw, if null doesn't replace the current dimension.
* @param mcMatrixStack This matrix stack should come straight from MC's renderChunkLayer (or future equivalent) method
* @param partialTicks how far into the current tick this method was called.
*/
@SuppressWarnings("deprecation")
public void drawLODs(LodDimension lodDim, MatrixStack mcMatrixStack, float partialTicks, IProfiler newProfiler)
{
//=================================//
// determine if LODs should render //
//=================================//
if (lodDim == null)
{
// if there aren't any loaded LodChunks
// don't try drawing anything
return;
}
if (mc.getPlayer().getActiveEffectsMap().get(Effects.BLINDNESS) != null)
{
// if the player is blind don't render LODs,
// and don't change minecraft's fog
// which blindness relies on.
return;
}
//===============//
// initial setup //
//===============//
profiler = newProfiler;
profiler.push("LOD setup");
// TODO move the buffer regeneration logic into its own class (probably called in the client proxy instead)
// starting here...
determineIfLodsShouldRegenerate(lodDim, partialTicks);
//=================//
// create the LODs //
//=================//
// only regenerate the LODs if:
// 1. we want to regenerate LODs
// 2. we aren't already regenerating the LODs
// 3. we aren't waiting for the build and draw buffers to swap
// (this is to prevent thread conflicts)
if ((partialRegen || fullRegen) && !lodBufferBuilder.generatingBuffers && !lodBufferBuilder.newBuffersAvailable())
{
// generate the LODs on a separate thread to prevent stuttering or freezing
lodBufferBuilder.generateLodBuffersAsync(this, lodDim, mc.getPlayer().blockPosition(), true);
// the regen process has been started,
// it will be done when lodBufferBuilder.newBuffersAvailable()
// is true
fullRegen = false;
partialRegen = false;
}
// TODO move the buffer regeneration logic into its own class (probably called in the client proxy instead)
// ...ending here
if (lodBufferBuilder.newBuffersAvailable())
{
swapBuffers();
}
//===========================//
// GL settings for rendering //
//===========================//
// set the required open GL settings
if (LodConfig.CLIENT.advancedModOptions.debugging.debugMode.get() == DebugMode.SHOW_DETAIL_WIREFRAME)
GL15.glPolygonMode(GL15.GL_FRONT_AND_BACK, GL15.GL_LINE);
else
GL15.glPolygonMode(GL15.GL_FRONT_AND_BACK, GL15.GL_FILL);
GL15.glDisable(GL15.GL_TEXTURE_2D);
GL15.glEnable(GL15.GL_CULL_FACE);
GL15.glEnable(GL15.GL_COLOR_MATERIAL);
GL15.glEnable(GL15.GL_DEPTH_TEST);
// enable transparent rendering
GL15.glBlendFunc(GL15.GL_SRC_ALPHA, GL15.GL_ONE_MINUS_SRC_ALPHA);
GL15.glEnable(GL15.GL_BLEND);
// disable the lights Minecraft uses
GL15.glDisable(GL15.GL_LIGHT0);
GL15.glDisable(GL15.GL_LIGHT1);
// get the default projection matrix, so we can
// reset it after drawing the LODs
float[] mcProjMatrixRaw = new float[16];
GL15.glGetFloatv(GL15.GL_PROJECTION_MATRIX, mcProjMatrixRaw);
Matrix4f mcProjectionMatrix = new Matrix4f(mcProjMatrixRaw);
// OpenGl outputs their matrices in col,row form instead of row,col
// (or maybe vice versa I have no idea :P)
mcProjectionMatrix.transpose();
Matrix4f modelViewMatrix = offsetTheModelViewMatrix(mcMatrixStack, partialTicks);
vanillaBlockRenderedDistance = mc.getRenderDistance() * LodUtil.CHUNK_WIDTH;
// required for setupFog and setupProjectionMatrix
if (mc.getClientWorld().dimensionType().hasCeiling())
farPlaneBlockDistance = Math.min(LodConfig.CLIENT.graphics.qualityOption.lodChunkRenderDistance.get(), LodUtil.CEILED_DIMENSION_MAX_RENDER_DISTANCE) * LodUtil.CHUNK_WIDTH;
else
farPlaneBlockDistance = LodConfig.CLIENT.graphics.qualityOption.lodChunkRenderDistance.get() * LodUtil.CHUNK_WIDTH;
setupProjectionMatrix(mcProjectionMatrix, vanillaBlockRenderedDistance, partialTicks);
// commented out until we can add shaders to handle lighting
//setupLighting(lodDim, partialTicks);
NearFarFogSettings fogSettings = determineFogSettings();
// determine the current fog settings, so they can be
// reset after drawing the LODs
float defaultFogStartDist = GL15.glGetFloat(GL15.GL_FOG_START);
float defaultFogEndDist = GL15.glGetFloat(GL15.GL_FOG_END);
int defaultFogMode = GL15.glGetInteger(GL15.GL_FOG_MODE);
int defaultFogDistance = GlProxy.getInstance().fancyFogAvailable ? GL15.glGetInteger(NVFogDistance.GL_FOG_DISTANCE_MODE_NV) : -1;
//===========//
// rendering //
//===========//
profiler.popPush("LOD draw");
if (vbos != null)
{
ActiveRenderInfo renderInfo = mc.getGameRenderer().getMainCamera();
Vector3d cameraDir = new Vector3d(renderInfo.getLookVector());
boolean cullingDisabled = LodConfig.CLIENT.graphics.advancedGraphicsOption.disableDirectionalCulling.get();
boolean renderBufferStorage = LodConfig.CLIENT.graphics.advancedGraphicsOption.gpuUploadMethod.get() == GpuUploadMethod.BUFFER_STORAGE && GlProxy.getInstance().bufferStorageSupported;
// used to determine what type of fog to render
int halfWidth = vbos.length / 2;
int quarterWidth = vbos.length / 4;
// where the center of the built buffers is (needed when culling regions)
RegionPos vboCenterRegionPos = new RegionPos(vbosCenter);
for (int x = 0; x < vbos.length; x++)
{
for (int z = 0; z < vbos.length; z++)
{
RegionPos vboPos = new RegionPos(
x + vboCenterRegionPos.x - (lodDim.getWidth() / 2),
z + vboCenterRegionPos.z - (lodDim.getWidth() / 2));
if (cullingDisabled || RenderUtil.isRegionInViewFrustum(renderInfo.getBlockPosition(), cameraDir, vboPos.blockPos()))
{
if ((x > halfWidth - quarterWidth && x < halfWidth + quarterWidth)
&& (z > halfWidth - quarterWidth && z < halfWidth + quarterWidth))
setupFog(fogSettings.near.distance, fogSettings.near.quality);
else
setupFog(fogSettings.far.distance, fogSettings.far.quality);
if (storageBufferIds != null && renderBufferStorage)
for (int i = 0; i < storageBufferIds[x][z].length; i++)
drawStorageBuffer(vbos[x][z][i], storageBufferIds[x][z][i], modelViewMatrix);
else
for (int i = 0; i < vbos[x][z].length; i++)
drawVertexBuffer(vbos[x][z][i], modelViewMatrix);
}
}
}
}
//=========//
// cleanup //
//=========//
profiler.popPush("LOD cleanup");
GL15.glPolygonMode(GL15.GL_FRONT_AND_BACK, GL15.GL_FILL);
GL15.glEnable(GL15.GL_TEXTURE_2D);
GL15.glDisable(LOD_GL_LIGHT_NUMBER);
GL15.glDisable(GL15.GL_BLEND);
// re-enable the lights Minecraft uses
GL15.glEnable(GL15.GL_LIGHT0);
GL15.glEnable(GL15.GL_LIGHT1);
RenderSystem.disableLighting();
// reset the fog settings so the normal chunks
// will be drawn correctly
cleanupFog(fogSettings, defaultFogStartDist, defaultFogEndDist, defaultFogMode, defaultFogDistance);
// reset the projection matrix so anything drawn after
// the LODs will use the correct projection matrix
gameRender.resetProjectionMatrix(mcProjectionMatrix);
// clear the depth buffer so anything drawn is drawn
// over the LODs
GL15.glClear(GL15.GL_DEPTH_BUFFER_BIT);
// end of internal LOD profiling
profiler.pop();
}
/** This is where the actual drawing happens. */
private void drawStorageBuffer(VertexBuffer vbo, int bufferStorageId, Matrix4f modelViewMatrix)
{
if (vbo == null)
return;
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, bufferStorageId);
// 0L is the starting pointer
LodUtil.LOD_VERTEX_FORMAT.setupBufferState(0L);
vbo.draw(modelViewMatrix, GL15.GL_QUADS);
GL15C.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
LodUtil.LOD_VERTEX_FORMAT.clearBufferState();
}
/** This is where the actual drawing happens. */
private void drawVertexBuffer(VertexBuffer vbo, Matrix4f modelViewMatrix)
{
if (vbo == null)
return;
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, vbo.id);
// 0L is the starting pointer
LodUtil.LOD_VERTEX_FORMAT.setupBufferState(0L);
vbo.draw(modelViewMatrix, GL15.GL_QUADS);
GL15C.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
LodUtil.LOD_VERTEX_FORMAT.clearBufferState();
}
//=================//
// Setup Functions //
//=================//
@SuppressWarnings("deprecation")
private void setupFog(FogDistance fogDistance, FogQuality fogQuality)
{
if (fogQuality == FogQuality.OFF)
{
GL15.glDisable(GL15.GL_FOG);
return;
}
if (fogDistance == FogDistance.NEAR_AND_FAR)
{
throw new IllegalArgumentException("setupFog doesn't accept the NEAR_AND_FAR fog distance.");
}
// determine the fog distance mode to use
int glFogDistanceMode;
if (fogQuality == FogQuality.FANCY)
{
// fancy fog (fragment distance based fog)
glFogDistanceMode = NVFogDistance.GL_EYE_RADIAL_NV;
}
else
{
// fast fog (frustum distance based fog)
glFogDistanceMode = NVFogDistance.GL_EYE_PLANE_ABSOLUTE_NV;
}
// the multipliers are percentages
// of the regular view distance.
if (fogDistance == FogDistance.FAR)
{
// the reason that I wrote fogEnd then fogStart backwards
// is because we are using fog backwards to how
// it is normally used, with it hiding near objects
// instead of far objects.
if (fogQuality == FogQuality.FANCY)
{
// for more realistic fog when using FAR
if (LodConfig.CLIENT.graphics.fogQualityOption.fogDistance.get() == FogDistance.NEAR_AND_FAR)
RenderSystem.fogStart(farPlaneBlockDistance * 1.6f * 0.9f);
else
RenderSystem.fogStart(Math.min(vanillaBlockRenderedDistance * 1.5f, farPlaneBlockDistance * 0.9f * 1.6f));
RenderSystem.fogEnd(farPlaneBlockDistance * 1.6f);
}
else if (fogQuality == FogQuality.FAST)
{
// for the far fog of the normal chunks
// to start right where the LODs' end use:
// end = 0.8f, start = 1.5f
RenderSystem.fogStart(farPlaneBlockDistance * 0.75f);
RenderSystem.fogEnd(farPlaneBlockDistance * 1.0f);
}
}
else if (fogDistance == FogDistance.NEAR)
{
if (fogQuality == FogQuality.FANCY)
{
RenderSystem.fogEnd(vanillaBlockRenderedDistance * 1.41f);
RenderSystem.fogStart(vanillaBlockRenderedDistance * 1.6f);
}
else if (fogQuality == FogQuality.FAST)
{
RenderSystem.fogEnd(vanillaBlockRenderedDistance * 1.0f);
RenderSystem.fogStart(vanillaBlockRenderedDistance * 1.5f);
}
}
GL15.glEnable(GL15.GL_FOG);
RenderSystem.enableFog();
RenderSystem.setupNvFogDistance();
RenderSystem.fogMode(GlStateManager.FogMode.LINEAR);
if (GlProxy.getInstance().fancyFogAvailable)
GL15.glFogi(NVFogDistance.GL_FOG_DISTANCE_MODE_NV, glFogDistanceMode);
}
/**
* Revert any changes that were made to the fog
* and sets up the fog for Minecraft.
*/
@SuppressWarnings("deprecation")
private void cleanupFog(NearFarFogSettings fogSettings,
float defaultFogStartDist, float defaultFogEndDist,
int defaultFogMode, int defaultFogDistance)
{
RenderSystem.fogStart(defaultFogStartDist);
RenderSystem.fogEnd(defaultFogEndDist);
RenderSystem.fogMode(defaultFogMode);
// this setting is only valid if the GPU supports fancy fog
if (GlProxy.getInstance().fancyFogAvailable)
GL15.glFogi(NVFogDistance.GL_FOG_DISTANCE_MODE_NV, defaultFogDistance);
// disable fog if Minecraft wasn't rendering fog
// or we want it disabled
if (!fogSettings.vanillaIsRenderingFog
|| LodConfig.CLIENT.graphics.fogQualityOption.disableVanillaFog.get())
{
// Make fog render a infinite distance away.
// This doesn't technically disable Minecraft's fog
// so performance will probably be the same regardless, unlike
// Optifine's no fog setting.
// we can't disable minecraft's fog outright because by default
// minecraft will re-enable the fog after our code
RenderSystem.fogStart(0.0F);
RenderSystem.fogEnd(Float.MAX_VALUE);
RenderSystem.fogDensity(0.0F);
}
}
/**
* Translate the camera relative to the LodDimension's center,
* this is done since all LOD buffers are created in world space
* instead of object space.
* (since AxisAlignedBoundingBoxes (LODs) use doubles and thus have a higher
* accuracy vs the model view matrix, which only uses floats)
*/
private Matrix4f offsetTheModelViewMatrix(MatrixStack mcMatrixStack, float partialTicks)
{
// duplicate the last matrix
mcMatrixStack.pushPose();
// get all relevant camera info
ActiveRenderInfo renderInfo = mc.getGameRenderer().getMainCamera();
Vector3d projectedView = renderInfo.getPosition();
// translate the camera relative to the regions' center
// (AxisAlignedBoundingBoxes (LODs) use doubles and thus have a higher
// accuracy vs the model view matrix, which only uses floats)
BlockPos bufferPos = vbosCenter.getWorldPosition();
Vector3d eyePos = mc.getPlayer().getEyePosition(partialTicks);
double xDiff = eyePos.x - bufferPos.getX();
double zDiff = eyePos.z - bufferPos.getZ();
mcMatrixStack.translate(-xDiff, -projectedView.y, -zDiff);
// get the modified model view matrix
Matrix4f lodModelViewMatrix = mcMatrixStack.last().pose();
// remove the lod ModelViewMatrix
mcMatrixStack.popPose();
return lodModelViewMatrix;
}
/**
* create a new projection matrix and send it over to the GPU
* @param currentProjectionMatrix this is Minecraft's current projection matrix
* @param vanillaBlockRenderedDistance Minecraft's vanilla far plane distance
* @param partialTicks how many ticks into the frame we are
*/
private void setupProjectionMatrix(Matrix4f currentProjectionMatrix, float vanillaBlockRenderedDistance, float partialTicks)
{
// create the new projection matrix
Matrix4f lodPoj =
Matrix4f.perspective(
getFov(partialTicks, true),
(float) this.mc.getWindow().getScreenWidth() / (float) this.mc.getWindow().getScreenHeight(),
vanillaBlockRenderedDistance / 5,
farPlaneBlockDistance * LodUtil.CHUNK_WIDTH / 2);
// get Minecraft's un-edited projection matrix
// (this is before it is zoomed, distorted, etc.)
Matrix4f defaultMcProj = mc.getGameRenderer().getProjectionMatrix(mc.getGameRenderer().getMainCamera(), partialTicks, true);
// true here means use "use fov setting" (probably)
// this logic strips away the defaultMcProj matrix, so we
// can get the distortionMatrix, which represents all
// transformations, zooming, distortions, etc. done
// to Minecraft's Projection matrix
Matrix4f defaultMcProjInv = defaultMcProj.copy();
defaultMcProjInv.invert();
Matrix4f distortionMatrix = defaultMcProjInv.copy();
distortionMatrix.multiply(currentProjectionMatrix);
// edit the lod projection to match Minecraft's
// (so the LODs line up with the real world)
lodPoj.multiply(distortionMatrix);
// send the projection over to the GPU
gameRender.resetProjectionMatrix(lodPoj);
}
///** setup the lighting to be used for the LODs */
/*private void setupLighting(LodDimension lodDimension, float partialTicks)
{
// Determine if the player has night vision
boolean playerHasNightVision = false;
if (this.mc.getPlayer() != null)
{
Iterator<EffectInstance> iterator = this.mc.getPlayer().getActiveEffects().iterator();
while (iterator.hasNext())
{
EffectInstance instance = iterator.next();
if (instance.getEffect() == Effects.NIGHT_VISION)
{
playerHasNightVision = true;
break;
}
}
}
float sunBrightness = lodDimension.dimension.hasSkyLight() ? mc.getSkyDarken(partialTicks) : 0.2f;
sunBrightness = playerHasNightVision ? 1.0f : sunBrightness;
float gamma = (float) mc.getOptions().gamma - 0.0f;
float dayEffect = (sunBrightness - 0.2f) * 1.25f;
float lightStrength = (gamma * 0.34f - 0.01f) * (1.0f - dayEffect) + dayEffect - 0.20f; //gamma * 0.2980392157f + 0.1647058824f
float blueLightStrength = (gamma * 0.44f + 0.12f) * (1.0f - dayEffect) + dayEffect - 0.20f; //gamma * 0.4235294118f + 0.2784313725f
float[] lightAmbient = {lightStrength, lightStrength, blueLightStrength, 1.0f};
// can be used for debugging
// if (partialTicks < 0.005)
// ClientProxy.LOGGER.debug(lightStrength);
ByteBuffer temp = ByteBuffer.allocateDirect(16);
temp.order(ByteOrder.nativeOrder());
GL15.glLightfv(LOD_GL_LIGHT_NUMBER, GL15.GL_AMBIENT, (FloatBuffer) temp.asFloatBuffer().put(lightAmbient).flip());
GL15.glEnable(LOD_GL_LIGHT_NUMBER); // Enable the above lighting
RenderSystem.enableLighting();
}*/
/** Create all buffers that will be used. */
public void setupBuffers(LodDimension lodDim)
{
lodBufferBuilder.setupBuffers(lodDim);
}
//======================//
// Other Misc Functions //
//======================//
/**
* If this is called then the next time "drawLODs" is called
* the LODs will be regenerated; the same as if the player moved.
*/
public void regenerateLODsNextFrame()
{
fullRegen = true;
}
/**
* Replace the current Vertex Buffers with the newly
* created buffers from the lodBufferBuilder. <br><br>
* <p>
* For some reason this has to be called after the frame has been rendered,
* otherwise visual stuttering/rubber banding may happen. I'm not sure why...
*/
private void swapBuffers()
{
// replace the drawable buffers with
// the newly created buffers from the lodBufferBuilder
VertexBuffersAndOffset result = lodBufferBuilder.getVertexBuffers();
vbos = result.vbos;
storageBufferIds = result.storageBufferIds;
vbosCenter = result.drawableCenterChunkPos;
}
/** Calls the BufferBuilder's destroyBuffers method. */
public void destroyBuffers()
{
lodBufferBuilder.destroyBuffers();
}
private double getFov(float partialTicks, boolean useFovSetting)
{
return mc.getGameRenderer().getFov(mc.getGameRenderer().getMainCamera(), partialTicks, useFovSetting);
}
/** Return what fog settings should be used when rendering. */
private NearFarFogSettings determineFogSettings()
{
NearFarFogSettings fogSettings = new NearFarFogSettings();
FogQuality quality = ReflectionHandler.INSTANCE.getFogQuality();
FogDrawOverride override = LodConfig.CLIENT.graphics.fogQualityOption.fogDrawOverride.get();
fogSettings.vanillaIsRenderingFog = quality != FogQuality.OFF;
// use any fog overrides the user may have set
switch (override)
{
case FANCY:
quality = FogQuality.FANCY;
break;
case NO_FOG:
quality = FogQuality.OFF;
break;
case FAST:
quality = FogQuality.FAST;
break;
case OPTIFINE_SETTING:
// don't override anything
break;
}
// only use fancy fog if the user's GPU can deliver
if (!GlProxy.getInstance().fancyFogAvailable && quality == FogQuality.FANCY)
{
quality = FogQuality.FAST;
}
// how different distances are drawn depends on the quality set
switch (quality)
{
case FANCY:
fogSettings.near.quality = FogQuality.FANCY;
fogSettings.far.quality = FogQuality.FANCY;
switch (LodConfig.CLIENT.graphics.fogQualityOption.fogDistance.get())
{
case NEAR_AND_FAR:
fogSettings.near.distance = FogDistance.NEAR;
fogSettings.far.distance = FogDistance.FAR;
break;
case NEAR:
fogSettings.near.distance = FogDistance.NEAR;
fogSettings.far.distance = FogDistance.NEAR;
break;
case FAR:
fogSettings.near.distance = FogDistance.FAR;
fogSettings.far.distance = FogDistance.FAR;
break;
}
break;
case FAST:
fogSettings.near.quality = FogQuality.FAST;
fogSettings.far.quality = FogQuality.FAST;
// fast fog setting should only have one type of
// fog, since the LODs are separated into a near
// and far portion; and fast fog is rendered from the
// frustrum's perspective instead of the camera
switch (LodConfig.CLIENT.graphics.fogQualityOption.fogDistance.get())
{
case NEAR_AND_FAR:
case NEAR:
fogSettings.near.distance = FogDistance.NEAR;
fogSettings.far.distance = FogDistance.NEAR;
break;
case FAR:
fogSettings.near.distance = FogDistance.FAR;
fogSettings.far.distance = FogDistance.FAR;
break;
}
break;
case OFF:
fogSettings.near.quality = FogQuality.OFF;
fogSettings.far.quality = FogQuality.OFF;
break;
}
return fogSettings;
}
/** Determines if the LODs should have a fullRegen or partialRegen */
private void determineIfLodsShouldRegenerate(LodDimension lodDim, float partialTicks)
{
short chunkRenderDistance = (short) mc.getRenderDistance();
int vanillaRenderedChunksWidth = chunkRenderDistance * 2 + 2;
//=============//
// full regens //
//=============//
// check if the view distance changed
if (ClientProxy.previousLodRenderDistance != LodConfig.CLIENT.graphics.qualityOption.lodChunkRenderDistance.get()
|| chunkRenderDistance != prevRenderDistance
|| prevFogDistance != LodConfig.CLIENT.graphics.fogQualityOption.fogDistance.get())
{
vanillaRenderedChunks = new boolean[vanillaRenderedChunksWidth][vanillaRenderedChunksWidth];
DetailDistanceUtil.updateSettings();
fullRegen = true;
previousPos = LevelPosUtil.createLevelPos((byte) 4, mc.getPlayer().xChunk, mc.getPlayer().zChunk);
prevFogDistance = LodConfig.CLIENT.graphics.fogQualityOption.fogDistance.get();
prevRenderDistance = chunkRenderDistance;
}
// did the user change the debug setting?
if (LodConfig.CLIENT.advancedModOptions.debugging.debugMode.get() != previousDebugMode)
{
previousDebugMode = LodConfig.CLIENT.advancedModOptions.debugging.debugMode.get();
fullRegen = true;
}
long newTime = System.currentTimeMillis();
// check if the player has moved
if (newTime - prevPlayerPosTime > LodConfig.CLIENT.advancedModOptions.buffers.rebuildTimes.get().playerMoveTimeout)
{
if (LevelPosUtil.getDetailLevel(previousPos) == 0
|| mc.getPlayer().xChunk != LevelPosUtil.getPosX(previousPos)
|| mc.getPlayer().zChunk != LevelPosUtil.getPosZ(previousPos))
{
vanillaRenderedChunks = new boolean[vanillaRenderedChunksWidth][vanillaRenderedChunksWidth];
fullRegen = true;
previousPos = LevelPosUtil.createLevelPos((byte) 4, mc.getPlayer().xChunk, mc.getPlayer().zChunk);
}
prevPlayerPosTime = newTime;
}
// determine how far the lighting has to
// change in order to rebuild the buffers
// the max brightness is 1 and the minimum is 0.2
float skyBrightness = lodDim.dimension.hasSkyLight() ? mc.getSkyDarken(partialTicks) : 0.2f;
float minLightingDifference;
switch (LodConfig.CLIENT.advancedModOptions.buffers.rebuildTimes.get())
{
case FREQUENT:
minLightingDifference = 0.025f;
break;
case NORMAL:
minLightingDifference = 0.05f;
break;
default:
case RARE:
minLightingDifference = 0.1f;
break;
}
// check if the lighting changed
if (Math.abs(skyBrightness - prevSkyBrightness) > minLightingDifference
// make sure the lighting gets to the max/minimum value
// (just in case the minLightingDifference is too large to notice the change)
|| (skyBrightness == 1.0f && prevSkyBrightness != 1.0f) // noon
|| (skyBrightness == 0.2f && prevSkyBrightness != 0.2f) // midnight
|| mc.getOptions().gamma != prevBrightness || lightMap == null)
{
fullRegen = true;
lightMap = mc.getCurrentLightMap();
prevBrightness = mc.getOptions().gamma;
prevSkyBrightness = skyBrightness;
}
/*if (lightMap != lastLightMap)
{
fullRegen = true;
lastLightMap = lightMap;
}*/
//================//
// partial regens //
//================//
// check if the vanilla rendered chunks changed
if (newTime - prevVanillaChunkTime > LodConfig.CLIENT.advancedModOptions.buffers.rebuildTimes.get().renderedChunkTimeout)
{
if (vanillaRenderedChunksChanged)
{
partialRegen = true;
vanillaRenderedChunksChanged = false;
}
prevVanillaChunkTime = newTime;
}
// check if there is any newly generated terrain to show
if (newTime - prevChunkTime > LodConfig.CLIENT.advancedModOptions.buffers.rebuildTimes.get().chunkChangeTimeout)
{
if (lodDim.regenDimensionBuffers)
{
partialRegen = true;
lodDim.regenDimensionBuffers = false;
}
prevChunkTime = newTime;
}
//==============//
// LOD skipping //
//==============//
// determine which LODs should not be rendered close to the player
HashSet<ChunkPos> chunkPosToSkip = LodUtil.getNearbyLodChunkPosToSkip(lodDim, mc.getPlayer().blockPosition());
int xIndex;
int zIndex;
for (ChunkPos pos : chunkPosToSkip)
{
vanillaRenderedChunksEmptySkip = false;
xIndex = (pos.x - mc.getPlayer().xChunk) + (chunkRenderDistance + 1);
zIndex = (pos.z - mc.getPlayer().zChunk) + (chunkRenderDistance + 1);
// sometimes we are given chunks that are outside the render distance,
// This prevents index out of bounds exceptions
if (xIndex >= 0 && zIndex >= 0
&& xIndex < vanillaRenderedChunks.length
&& zIndex < vanillaRenderedChunks.length)
{
if (!vanillaRenderedChunks[xIndex][zIndex])
{
vanillaRenderedChunks[xIndex][zIndex] = true;
vanillaRenderedChunksChanged = true;
lodDim.markRegionBufferToRegen(pos.getRegionX(), pos.getRegionZ());
}
}
}
// if the player is high enough, draw all LODs
if (chunkPosToSkip.isEmpty() && mc.getPlayer().position().y > 256 && !vanillaRenderedChunksEmptySkip)
{
vanillaRenderedChunks = new boolean[vanillaRenderedChunksWidth][vanillaRenderedChunksWidth];
vanillaRenderedChunksChanged = true;
vanillaRenderedChunksEmptySkip = true;
}
}
}
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