* I know there are commands to change that amount
* (specifically "-XX:MaxDirectMemorySize"), but
* I have no idea how to access that amount.
* So I guess this will be the hard limit for now.
*
* https://stackoverflow.com/questions/50499238/bytebuffer-allocatedirect-and-xmx
*/
public static final int MAX_ALOCATEABLE_DIRECT_MEMORY = 64 * 1024 * 1024;
/**
* If true the LODs colors will be replaced with
* a checkerboard, this can be used for debugging.
*/
public DebugMode previousDebugMode = DebugMode.OFF;
private MinecraftWrapper mc;
private GameRenderer gameRender;
private IProfiler profiler;
private int farPlaneBlockDistance;
/**
* This is used to generate the buildable buffers
*/
private LodBufferBuilder lodBufferBuilder;
/**
* Each VertexBuffer represents 1 region
*/
private VertexBuffer[][] vbos;
public static final VertexFormat LOD_VERTEX_FORMAT = DefaultVertexFormats.POSITION_COLOR;
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;
// these variables are used to determine if the buffers should be rebuilt
private long prevDayTime = 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 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.
*/
public void drawLODs(LodDimension lodDim, MatrixStack mcMatrixStack, float partialTicks, IProfiler newProfiler)
{
if (lodDim == null)
{
// if there aren't any loaded LodChunks
// don't try drawing anything
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);
//=================//
// 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.newBuffersAvaliable())
{
// 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.newBuffersAvaliable()
// 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.newBuffersAvaliable())
{
swapBuffers();
}
//===========================//
// GL settings for rendering //
//===========================//
// set the required open GL settings
if (LodConfig.CLIENT.debugging.debugMode.get() == DebugMode.SHOW_DETAIL_WIREFRAME)
GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_LINE);
else
GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_FILL);
GL11.glDisable(GL11.GL_TEXTURE_2D);
GL11.glEnable(GL11.GL_CULL_FACE);
GL11.glEnable(GL11.GL_COLOR_MATERIAL);
GL11.glEnable(GL11.GL_DEPTH_TEST);
// disable the lights Minecraft uses
GL11.glDisable(GL11.GL_LIGHT0);
GL11.glDisable(GL11.GL_LIGHT1);
// get the default projection matrix so we can
// reset it after drawing the LODs
float[] mcProjMatrixRaw = new float[16];
GL11.glGetFloatv(GL11.GL_PROJECTION_MATRIX, mcProjMatrixRaw);
Matrix4f mcProjectionMatrix = new Matrix4f(mcProjMatrixRaw);
// OpenGl outputs their matricies in col,row form instead of row,col
// (or maybe vice versa I have no idea :P)
mcProjectionMatrix.transpose();
Matrix4f modelViewMatrix = offsetTheModelViewMatrix(mcMatrixStack, partialTicks);
// required for setupFog and setupProjectionMatrix
farPlaneBlockDistance = LodConfig.CLIENT.graphics.lodChunkRenderDistance.get() * LodUtil.CHUNK_WIDTH;
setupProjectionMatrix(mcProjectionMatrix, 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 = GL11.glGetFloat(GL11.GL_FOG_START);
float defaultFogEndDist = GL11.glGetFloat(GL11.GL_FOG_END);
int defaultFogMode = GL11.glGetInteger(GL11.GL_FOG_MODE);
int defaultFogDistance = GL11.glGetInteger(NVFogDistance.GL_FOG_DISTANCE_MODE_NV);
//===========//
// rendering //
//===========//
profiler.popPush("LOD draw");
if (vbos != null)
{
ActiveRenderInfo renderInfo = mc.getGameRenderer().getMainCamera();
Vector3d cameraDir = new Vector3d(renderInfo.getLookVector());
boolean cullingDisabled = LodConfig.CLIENT.graphics.disableDirectionalCulling.get();
// used to determine what type of fog to render
int halfWidth = vbos.length / 2;
int quarterWidth = vbos.length / 4;
for (int i = 0; i < vbos.length; i++)
{
for (int j = 0; j < vbos.length; j++)
{
RegionPos vboPos = new RegionPos(i + lodDim.getCenterX() - lodDim.getWidth() / 2, j + lodDim.getCenterZ() - lodDim.getWidth() / 2);
if (cullingDisabled || RenderUtil.isRegionInViewFrustum(renderInfo.getBlockPosition(), cameraDir, vboPos.blockPos()))
{
if ((i > halfWidth - quarterWidth && i < halfWidth + quarterWidth) && (j > halfWidth - quarterWidth && j < halfWidth + quarterWidth))
setupFog(fogSettings.near.distance, fogSettings.near.quality);
else
setupFog(fogSettings.far.distance, fogSettings.far.quality);
sendLodsToGpuAndDraw(vbos[i][j], modelViewMatrix);
}
}
}
}
//=========//
// cleanup //
//=========//
profiler.popPush("LOD cleanup");
GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_FILL);
GL11.glEnable(GL11.GL_TEXTURE_2D);
GL11.glDisable(LOD_GL_LIGHT_NUMBER);
// re-enable the lights Minecraft uses
GL11.glEnable(GL11.GL_LIGHT0);
GL11.glEnable(GL11.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
GL11.glClear(GL11.GL_DEPTH_BUFFER_BIT);
// end of internal LOD profiling
profiler.pop();
}
/**
* This is where the actual drawing happens.
*/
private void sendLodsToGpuAndDraw(VertexBuffer vbo, Matrix4f modelViewMatrix)
{
if (vbo == null)
return;
GL15C.glBindBuffer(GL15.GL_ARRAY_BUFFER, vbo.id);
// 0L is the starting pointer
LOD_VERTEX_FORMAT.setupBufferState(0L);
vbo.draw(modelViewMatrix, GL11.GL_QUADS);
GL15C.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
LOD_VERTEX_FORMAT.clearBufferState();
}
//=================//
// Setup Functions //
//=================//
@SuppressWarnings("deprecation")
private void setupFog(FogDistance fogDistance, FogQuality fogQuality)
{
if (fogQuality == FogQuality.OFF)
{
FogRenderer.setupNoFog();
RenderSystem.disableFog();
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.fogDistance.get() == FogDistance.NEAR_AND_FAR)
{
RenderSystem.fogStart(farPlaneBlockDistance * 0.9f);
RenderSystem.fogEnd(farPlaneBlockDistance * 1.0f);
}else{
RenderSystem.fogStart(farPlaneBlockDistance * 0.1f);
RenderSystem.fogEnd(farPlaneBlockDistance * 1.0f);
}
}
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 * 1.5f);
RenderSystem.fogEnd(farPlaneBlockDistance * 2.0f);
}
}
else if (fogDistance == FogDistance.NEAR)
{
if (fogQuality == FogQuality.FANCY)
{
RenderSystem.fogEnd(mc.getRenderDistance() * 16 * 1.41f);
RenderSystem.fogStart(mc.getRenderDistance() * 16 * 1.6f);
}
else if (fogQuality == FogQuality.FAST)
{
RenderSystem.fogEnd(mc.getRenderDistance() * 16 * 1.0f);
RenderSystem.fogStart(mc.getRenderDistance() * 16 * 1.5f);
}
}
GL11.glEnable(GL11.GL_FOG);
RenderSystem.enableFog();
RenderSystem.setupNvFogDistance();
RenderSystem.fogMode(GlStateManager.FogMode.LINEAR);
GL11.glFogi(NVFogDistance.GL_FOG_DISTANCE_MODE_NV, glFogDistanceMode);
}
/**
* Revert any changes that were made to the fog.
*/
private void cleanupFog(NearFarFogSettings fogSettings,
float defaultFogStartDist, float defaultFogEndDist,
int defaultFogMode, int defaultFogDistance)
{
RenderSystem.fogStart(defaultFogStartDist);
RenderSystem.fogEnd(defaultFogEndDist);
RenderSystem.fogMode(defaultFogMode);
GL11.glFogi(NVFogDistance.GL_FOG_DISTANCE_MODE_NV, defaultFogDistance);
// disable fog if Minecraft wasn't rendering fog
// but we were
if (!fogSettings.vanillaIsRenderingFog &&
(fogSettings.near.quality != FogQuality.OFF ||
fogSettings.far.quality != FogQuality.OFF))
{
GL11.glDisable(GL11.GL_FOG);
}
}
/**
* 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 partialTicks how many ticks into the frame we are
*/
private void setupProjectionMatrix(Matrix4f currentProjectionMatrix, float partialTicks)
{
// create the new projection matrix
Matrix4f lodPoj =
Matrix4f.perspective(
getFov(partialTicks, true),
(float) this.mc.getWindow().getScreenWidth() / (float) this.mc.getWindow().getScreenHeight(),
mc.getRenderDistance()/2,
farPlaneBlockDistance * LodUtil.CHUNK_WIDTH * 2 / 4);
// 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
*
* 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;
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.fogDrawOverride.get();
fogSettings.vanillaIsRenderingFog = quality != FogQuality.OFF;
// use any fog overrides the user may have set
switch (override)
{
case ALWAYS_DRAW_FOG_FANCY:
quality = FogQuality.FANCY;
break;
case NEVER_DRAW_FOG:
quality = FogQuality.OFF;
break;
case ALWAYS_DRAW_FOG_FAST:
quality = FogQuality.FAST;
break;
case USE_OPTIFINE_FOG_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.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.fogDistance.get())
{
case NEAR_AND_FAR:
fogSettings.near.distance = FogDistance.NEAR;
fogSettings.far.distance = FogDistance.NEAR;
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 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)
{
short chunkRenderDistance = (short) mc.getRenderDistance();
int vanillaRenderedChunksWidth = chunkRenderDistance*2+2;
vanillaRenderedChunks = new boolean[vanillaRenderedChunksWidth][vanillaRenderedChunksWidth];
//=============//
// full regens //
//=============//
// check if the view distance changed
if (ClientProxy.previousLodRenderDistance != LodConfig.CLIENT.graphics.lodChunkRenderDistance.get()
|| mc.getRenderDistance() != prevRenderDistance
|| prevFogDistance != LodConfig.CLIENT.graphics.fogDistance.get())
{
DetailDistanceUtil.updateSettings();
fullRegen = true;
previousPos = LevelPosUtil.createLevelPos((byte) 4, mc.getPlayer().xChunk, mc.getPlayer().zChunk);
prevFogDistance = LodConfig.CLIENT.graphics.fogDistance.get();
prevRenderDistance = mc.getRenderDistance();
}
// did the user change the debug setting?
if (LodConfig.CLIENT.debugging.debugMode.get() != previousDebugMode)
{
previousDebugMode = LodConfig.CLIENT.debugging.debugMode.get();
fullRegen = true;
}
long newTime = System.currentTimeMillis();
if(LodConfig.CLIENT.graphics.detailDropOff.get() == DetailDropOff.BY_BLOCK)
{
// check if the player has moved
if (newTime - prevPlayerPosTime > LodConfig.CLIENT.buffers.bufferRebuildPlayerMoveTimeout.get())
{
if (LevelPosUtil.getDetailLevel(previousPos) == 0
|| mc.getPlayer().xChunk != LevelPosUtil.getPosX(previousPos)
|| mc.getPlayer().zChunk != LevelPosUtil.getPosZ(previousPos))
{
fullRegen = true;
previousPos = LevelPosUtil.createLevelPos((byte) 4, mc.getPlayer().xChunk, mc.getPlayer().zChunk);
}
prevPlayerPosTime = newTime;
}
}
//================//
// partial regens //
//================//
// check if the vanilla rendered chunks changed
if (newTime - prevVanillaChunkTime > LodConfig.CLIENT.buffers.bufferRebuildChunkChangeTimeout.get())
{
if (vanillaRenderedChunksChanged)
{
partialRegen = true;
vanillaRenderedChunksChanged = false;
}
prevVanillaChunkTime = newTime;
}
// check if there is any newly generated terrain to show
if (newTime - prevChunkTime > LodConfig.CLIENT.buffers.bufferRebuildLodChangeTimeout.get())
{
if (lodDim.regenDimension)
{
partialRegen = true;
lodDim.regenDimension = false;
}
prevChunkTime = newTime;
}
// check if the lighting has changed
if (mc.getClientWorld().getDayTime() - prevDayTime > 1000 || mc.getOptions().gamma != prevBrightness || lightMap == null)
{
fullRegen = true;
lightMap = mc.getCurrentLightMap();
prevBrightness = mc.getOptions().gamma;
prevDayTime = mc.getClientWorld().getDayTime();
}
//==============//
// LOD skipping //
//==============//
// determine which LODs should not be rendered close to the player
HashSet