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Paper/patches/server/0016-Starlight.patch
Nassim Jahnke 2b6be6f1b3
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2023-03-14 19:05:23 +01:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Wed, 28 Oct 2020 16:51:55 -0700
Subject: [PATCH] Starlight
See https://github.com/PaperMC/Starlight
== AT ==
public net.minecraft.server.level.ChunkHolder broadcast(Lnet/minecraft/network/protocol/Packet;Z)V
public net.minecraft.world.level.chunk.LevelChunkSection states
diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/BlockStarLightEngine.java b/src/main/java/ca/spottedleaf/starlight/common/light/BlockStarLightEngine.java
new file mode 100644
index 0000000000000000000000000000000000000000..4a04eb6449d33d3f15c354b2ac98198f4ac12758
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/light/BlockStarLightEngine.java
@@ -0,0 +1,288 @@
+package ca.spottedleaf.starlight.common.light;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.ImposterProtoChunk;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.LevelChunkSection;
+import net.minecraft.world.level.chunk.LightChunkGetter;
+import net.minecraft.world.level.chunk.PalettedContainer;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public final class BlockStarLightEngine extends StarLightEngine {
+
+ public BlockStarLightEngine(final Level world) {
+ super(false, world);
+ }
+
+ @Override
+ protected boolean[] getEmptinessMap(final ChunkAccess chunk) {
+ return chunk.getBlockEmptinessMap();
+ }
+
+ @Override
+ protected void setEmptinessMap(final ChunkAccess chunk, final boolean[] to) {
+ chunk.setBlockEmptinessMap(to);
+ }
+
+ @Override
+ protected SWMRNibbleArray[] getNibblesOnChunk(final ChunkAccess chunk) {
+ return chunk.getBlockNibbles();
+ }
+
+ @Override
+ protected void setNibbles(final ChunkAccess chunk, final SWMRNibbleArray[] to) {
+ chunk.setBlockNibbles(to);
+ }
+
+ @Override
+ protected boolean canUseChunk(final ChunkAccess chunk) {
+ return chunk.getStatus().isOrAfter(ChunkStatus.LIGHT) && (this.isClientSide || chunk.isLightCorrect());
+ }
+
+ @Override
+ protected void setNibbleNull(final int chunkX, final int chunkY, final int chunkZ) {
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ if (nibble != null) {
+ // de-initialisation is not as straightforward as with sky data, since deinit of block light is typically
+ // because a block was removed - which can decrease light. with sky data, block breaking can only result
+ // in increases, and thus the existing sky block check will actually correctly propagate light through
+ // a null section. so in order to propagate decreases correctly, we can do a couple of things: not remove
+ // the data section, or do edge checks on ALL axis (x, y, z). however I do not want edge checks running
+ // for clients at all, as they are expensive. so we don't remove the section, but to maintain the appearence
+ // of vanilla data management we "hide" them.
+ nibble.setHidden();
+ }
+ }
+
+ @Override
+ protected void initNibble(final int chunkX, final int chunkY, final int chunkZ, final boolean extrude, final boolean initRemovedNibbles) {
+ if (chunkY < this.minLightSection || chunkY > this.maxLightSection || this.getChunkInCache(chunkX, chunkZ) == null) {
+ return;
+ }
+
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ if (nibble == null) {
+ if (!initRemovedNibbles) {
+ throw new IllegalStateException();
+ } else {
+ this.setNibbleInCache(chunkX, chunkY, chunkZ, new SWMRNibbleArray());
+ }
+ } else {
+ nibble.setNonNull();
+ }
+ }
+
+ @Override
+ protected final void checkBlock(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ) {
+ // blocks can change opacity
+ // blocks can change emitted light
+ // blocks can change direction of propagation
+
+ final int encodeOffset = this.coordinateOffset;
+ final int emittedMask = this.emittedLightMask;
+
+ final int currentLevel = this.getLightLevel(worldX, worldY, worldZ);
+ final BlockState blockState = this.getBlockState(worldX, worldY, worldZ);
+ final int emittedLevel = blockState.getLightEmission() & emittedMask;
+
+ this.setLightLevel(worldX, worldY, worldZ, emittedLevel);
+ // this accounts for change in emitted light that would cause an increase
+ if (emittedLevel != 0) {
+ this.appendToIncreaseQueue(
+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (emittedLevel & 0xFL) << (6 + 6 + 16)
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (blockState.isConditionallyFullOpaque() ? FLAG_HAS_SIDED_TRANSPARENT_BLOCKS : 0)
+ );
+ }
+ // this also accounts for a change in emitted light that would cause a decrease
+ // this also accounts for the change of direction of propagation (i.e old block was full transparent, new block is full opaque or vice versa)
+ // as it checks all neighbours (even if current level is 0)
+ this.appendToDecreaseQueue(
+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (currentLevel & 0xFL) << (6 + 6 + 16)
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ // always keep sided transparent false here, new block might be conditionally transparent which would
+ // prevent us from decreasing sources in the directions where the new block is opaque
+ // if it turns out we were wrong to de-propagate the source, the re-propagate logic WILL always
+ // catch that and fix it.
+ );
+ // re-propagating neighbours (done by the decrease queue) will also account for opacity changes in this block
+ }
+
+ protected final BlockPos.MutableBlockPos recalcCenterPos = new BlockPos.MutableBlockPos();
+ protected final BlockPos.MutableBlockPos recalcNeighbourPos = new BlockPos.MutableBlockPos();
+
+ @Override
+ protected int calculateLightValue(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ,
+ final int expect) {
+ final BlockState centerState = this.getBlockState(worldX, worldY, worldZ);
+ int level = centerState.getLightEmission() & 0xF;
+
+ if (level >= (15 - 1) || level > expect) {
+ return level;
+ }
+
+ final int sectionOffset = this.chunkSectionIndexOffset;
+ final BlockState conditionallyOpaqueState;
+ int opacity = centerState.getOpacityIfCached();
+
+ if (opacity == -1) {
+ this.recalcCenterPos.set(worldX, worldY, worldZ);
+ opacity = centerState.getLightBlock(lightAccess.getLevel(), this.recalcCenterPos);
+ if (centerState.isConditionallyFullOpaque()) {
+ conditionallyOpaqueState = centerState;
+ } else {
+ conditionallyOpaqueState = null;
+ }
+ } else if (opacity >= 15) {
+ return level;
+ } else {
+ conditionallyOpaqueState = null;
+ }
+ opacity = Math.max(1, opacity);
+
+ for (final AxisDirection direction : AXIS_DIRECTIONS) {
+ final int offX = worldX + direction.x;
+ final int offY = worldY + direction.y;
+ final int offZ = worldZ + direction.z;
+
+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset;
+
+ final int neighbourLevel = this.getLightLevel(sectionIndex, (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8));
+
+ if ((neighbourLevel - 1) <= level) {
+ // don't need to test transparency, we know it wont affect the result.
+ continue;
+ }
+
+ final BlockState neighbourState = this.getBlockState(offX, offY, offZ);
+ if (neighbourState.isConditionallyFullOpaque()) {
+ // here the block can be conditionally opaque (i.e light cannot propagate from it), so we need to test that
+ // we don't read the blockstate because most of the time this is false, so using the faster
+ // known transparency lookup results in a net win
+ this.recalcNeighbourPos.set(offX, offY, offZ);
+ final VoxelShape neighbourFace = neighbourState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcNeighbourPos, direction.opposite.nms);
+ final VoxelShape thisFace = conditionallyOpaqueState == null ? Shapes.empty() : conditionallyOpaqueState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcCenterPos, direction.nms);
+ if (Shapes.faceShapeOccludes(thisFace, neighbourFace)) {
+ // not allowed to propagate
+ continue;
+ }
+ }
+
+ // passed transparency,
+
+ final int calculated = neighbourLevel - opacity;
+ level = Math.max(calculated, level);
+ if (level > expect) {
+ return level;
+ }
+ }
+
+ return level;
+ }
+
+ @Override
+ protected void propagateBlockChanges(final LightChunkGetter lightAccess, final ChunkAccess atChunk, final Set<BlockPos> positions) {
+ for (final BlockPos pos : positions) {
+ this.checkBlock(lightAccess, pos.getX(), pos.getY(), pos.getZ());
+ }
+
+ this.performLightDecrease(lightAccess);
+ }
+
+ protected Iterator<BlockPos> getSources(final LightChunkGetter lightAccess, final ChunkAccess chunk) {
+ if (chunk instanceof ImposterProtoChunk || chunk instanceof LevelChunk) {
+ // implementation on Chunk is pretty awful, so write our own here. The big optimisation is
+ // skipping empty sections, and the far more optimised reading of types.
+ List<BlockPos> sources = new ArrayList<>();
+
+ int offX = chunk.getPos().x << 4;
+ int offZ = chunk.getPos().z << 4;
+
+ final LevelChunkSection[] sections = chunk.getSections();
+ for (int sectionY = this.minSection; sectionY <= this.maxSection; ++sectionY) {
+ final LevelChunkSection section = sections[sectionY - this.minSection];
+ if (section == null || section.hasOnlyAir()) {
+ // no sources in empty sections
+ continue;
+ }
+ final PalettedContainer<BlockState> states = section.states;
+ final int offY = sectionY << 4;
+
+ for (int index = 0; index < (16 * 16 * 16); ++index) {
+ final BlockState state = states.get(index);
+ if (state.getLightEmission() <= 0) {
+ continue;
+ }
+
+ // index = x | (z << 4) | (y << 8)
+ sources.add(new BlockPos(offX | (index & 15), offY | (index >>> 8), offZ | ((index >>> 4) & 15)));
+ }
+ }
+
+ return sources.iterator();
+ } else {
+ // world gen and lighting run in parallel, and if lighting keeps up it can be lighting chunks that are
+ // being generated. In the nether, lava will add a lot of sources. This resulted in quite a few CME crashes.
+ // So all we do spinloop until we can collect a list of sources, and even if it is out of date we will pick up
+ // the missing sources from checkBlock.
+ for (;;) {
+ try {
+ return chunk.getLights().collect(Collectors.toList()).iterator();
+ } catch (final Exception cme) {
+ continue;
+ }
+ }
+ }
+ }
+
+ @Override
+ public void lightChunk(final LightChunkGetter lightAccess, final ChunkAccess chunk, final boolean needsEdgeChecks) {
+ // setup sources
+ final int emittedMask = this.emittedLightMask;
+ for (final Iterator<BlockPos> positions = this.getSources(lightAccess, chunk); positions.hasNext();) {
+ final BlockPos pos = positions.next();
+ final BlockState blockState = this.getBlockState(pos.getX(), pos.getY(), pos.getZ());
+ final int emittedLight = blockState.getLightEmission() & emittedMask;
+
+ if (emittedLight <= this.getLightLevel(pos.getX(), pos.getY(), pos.getZ())) {
+ // some other source is brighter
+ continue;
+ }
+
+ this.appendToIncreaseQueue(
+ ((pos.getX() + (pos.getZ() << 6) + (pos.getY() << (6 + 6)) + this.coordinateOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (emittedLight & 0xFL) << (6 + 6 + 16)
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (blockState.isConditionallyFullOpaque() ? FLAG_HAS_SIDED_TRANSPARENT_BLOCKS : 0)
+ );
+
+
+ // propagation wont set this for us
+ this.setLightLevel(pos.getX(), pos.getY(), pos.getZ(), emittedLight);
+ }
+
+ if (needsEdgeChecks) {
+ // not required to propagate here, but this will reduce the hit of the edge checks
+ this.performLightIncrease(lightAccess);
+
+ // verify neighbour edges
+ this.checkChunkEdges(lightAccess, chunk, this.minLightSection, this.maxLightSection);
+ } else {
+ this.propagateNeighbourLevels(lightAccess, chunk, this.minLightSection, this.maxLightSection);
+
+ this.performLightIncrease(lightAccess);
+ }
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/SWMRNibbleArray.java b/src/main/java/ca/spottedleaf/starlight/common/light/SWMRNibbleArray.java
new file mode 100644
index 0000000000000000000000000000000000000000..4ffb4ffe01c4628d52742c5c0bbd35220eea6294
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/light/SWMRNibbleArray.java
@@ -0,0 +1,440 @@
+package ca.spottedleaf.starlight.common.light;
+
+import net.minecraft.world.level.chunk.DataLayer;
+import java.util.ArrayDeque;
+import java.util.Arrays;
+
+// SWMR -> Single Writer Multi Reader Nibble Array
+public final class SWMRNibbleArray {
+
+ /*
+ * Null nibble - nibble does not exist, and should not be written to. Just like vanilla - null
+ * nibbles are always 0 - and they are never written to directly. Only initialised/uninitialised
+ * nibbles can be written to.
+ *
+ * Uninitialised nibble - They are all 0, but the backing array isn't initialised.
+ *
+ * Initialised nibble - Has light data.
+ */
+
+ protected static final int INIT_STATE_NULL = 0; // null
+ protected static final int INIT_STATE_UNINIT = 1; // uninitialised
+ protected static final int INIT_STATE_INIT = 2; // initialised
+ protected static final int INIT_STATE_HIDDEN = 3; // initialised, but conversion to Vanilla data should be treated as if NULL
+
+ public static final int ARRAY_SIZE = 16 * 16 * 16 / (8/4); // blocks / bytes per block
+ // this allows us to maintain only 1 byte array when we're not updating
+ static final ThreadLocal<ArrayDeque<byte[]>> WORKING_BYTES_POOL = ThreadLocal.withInitial(ArrayDeque::new);
+
+ private static byte[] allocateBytes() {
+ final byte[] inPool = WORKING_BYTES_POOL.get().pollFirst();
+ if (inPool != null) {
+ return inPool;
+ }
+
+ return new byte[ARRAY_SIZE];
+ }
+
+ private static void freeBytes(final byte[] bytes) {
+ WORKING_BYTES_POOL.get().addFirst(bytes);
+ }
+
+ public static SWMRNibbleArray fromVanilla(final DataLayer nibble) {
+ if (nibble == null) {
+ return new SWMRNibbleArray(null, true);
+ } else if (nibble.isEmpty()) {
+ return new SWMRNibbleArray();
+ } else {
+ return new SWMRNibbleArray(nibble.getData().clone()); // make sure we don't write to the parameter later
+ }
+ }
+
+ protected int stateUpdating;
+ protected volatile int stateVisible;
+
+ protected byte[] storageUpdating;
+ protected boolean updatingDirty; // only returns whether storageUpdating is dirty
+ protected volatile byte[] storageVisible;
+
+ public SWMRNibbleArray() {
+ this(null, false); // lazy init
+ }
+
+ public SWMRNibbleArray(final byte[] bytes) {
+ this(bytes, false);
+ }
+
+ public SWMRNibbleArray(final byte[] bytes, final boolean isNullNibble) {
+ if (bytes != null && bytes.length != ARRAY_SIZE) {
+ throw new IllegalArgumentException("Data of wrong length: " + bytes.length);
+ }
+ this.stateVisible = this.stateUpdating = bytes == null ? (isNullNibble ? INIT_STATE_NULL : INIT_STATE_UNINIT) : INIT_STATE_INIT;
+ this.storageUpdating = this.storageVisible = bytes;
+ }
+
+ public SWMRNibbleArray(final byte[] bytes, final int state) {
+ if (bytes != null && bytes.length != ARRAY_SIZE) {
+ throw new IllegalArgumentException("Data of wrong length: " + bytes.length);
+ }
+ if (bytes == null && (state == INIT_STATE_INIT || state == INIT_STATE_HIDDEN)) {
+ throw new IllegalArgumentException("Data cannot be null and have state be initialised");
+ }
+ this.stateUpdating = this.stateVisible = state;
+ this.storageUpdating = this.storageVisible = bytes;
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder stringBuilder = new StringBuilder();
+ stringBuilder.append("State: ");
+ switch (this.stateVisible) {
+ case INIT_STATE_NULL:
+ stringBuilder.append("null");
+ break;
+ case INIT_STATE_UNINIT:
+ stringBuilder.append("uninitialised");
+ break;
+ case INIT_STATE_INIT:
+ stringBuilder.append("initialised");
+ break;
+ case INIT_STATE_HIDDEN:
+ stringBuilder.append("hidden");
+ break;
+ default:
+ stringBuilder.append("unknown");
+ break;
+ }
+ stringBuilder.append("\nData:\n");
+
+ final byte[] data = this.storageVisible;
+ if (data != null) {
+ for (int i = 0; i < 4096; ++i) {
+ // Copied from NibbleArray#toString
+ final int level = ((data[i >>> 1] >>> ((i & 1) << 2)) & 0xF);
+
+ stringBuilder.append(Integer.toHexString(level));
+ if ((i & 15) == 15) {
+ stringBuilder.append("\n");
+ }
+
+ if ((i & 255) == 255) {
+ stringBuilder.append("\n");
+ }
+ }
+ } else {
+ stringBuilder.append("null");
+ }
+
+ return stringBuilder.toString();
+ }
+
+ public SaveState getSaveState() {
+ synchronized (this) {
+ final int state = this.stateVisible;
+ final byte[] data = this.storageVisible;
+ if (state == INIT_STATE_NULL) {
+ return null;
+ }
+ if (state == INIT_STATE_UNINIT) {
+ return new SaveState(null, state);
+ }
+ final boolean zero = isAllZero(data);
+ if (zero) {
+ return state == INIT_STATE_INIT ? new SaveState(null, INIT_STATE_UNINIT) : null;
+ } else {
+ return new SaveState(data.clone(), state);
+ }
+ }
+ }
+
+ protected static boolean isAllZero(final byte[] data) {
+ for (int i = 0; i < (ARRAY_SIZE >>> 4); ++i) {
+ byte whole = data[i << 4];
+
+ for (int k = 1; k < (1 << 4); ++k) {
+ whole |= data[(i << 4) | k];
+ }
+
+ if (whole != 0) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ // operation type: updating on src, updating on other
+ public void extrudeLower(final SWMRNibbleArray other) {
+ if (other.stateUpdating == INIT_STATE_NULL) {
+ throw new IllegalArgumentException();
+ }
+
+ if (other.storageUpdating == null) {
+ this.setUninitialised();
+ return;
+ }
+
+ final byte[] src = other.storageUpdating;
+ final byte[] into;
+
+ if (!this.updatingDirty) {
+ if (this.storageUpdating != null) {
+ into = this.storageUpdating = allocateBytes();
+ } else {
+ this.storageUpdating = into = allocateBytes();
+ this.stateUpdating = INIT_STATE_INIT;
+ }
+ this.updatingDirty = true;
+ } else {
+ into = this.storageUpdating;
+ }
+
+ final int start = 0;
+ final int end = (15 | (15 << 4)) >>> 1;
+
+ /* x | (z << 4) | (y << 8) */
+ for (int y = 0; y <= 15; ++y) {
+ System.arraycopy(src, start, into, y << (8 - 1), end - start + 1);
+ }
+ }
+
+ // operation type: updating
+ public void setFull() {
+ if (this.stateUpdating != INIT_STATE_HIDDEN) {
+ this.stateUpdating = INIT_STATE_INIT;
+ }
+ Arrays.fill(this.storageUpdating == null || !this.updatingDirty ? this.storageUpdating = allocateBytes() : this.storageUpdating, (byte)-1);
+ this.updatingDirty = true;
+ }
+
+ // operation type: updating
+ public void setZero() {
+ if (this.stateUpdating != INIT_STATE_HIDDEN) {
+ this.stateUpdating = INIT_STATE_INIT;
+ }
+ Arrays.fill(this.storageUpdating == null || !this.updatingDirty ? this.storageUpdating = allocateBytes() : this.storageUpdating, (byte)0);
+ this.updatingDirty = true;
+ }
+
+ // operation type: updating
+ public void setNonNull() {
+ if (this.stateUpdating == INIT_STATE_HIDDEN) {
+ this.stateUpdating = INIT_STATE_INIT;
+ return;
+ }
+ if (this.stateUpdating != INIT_STATE_NULL) {
+ return;
+ }
+ this.stateUpdating = INIT_STATE_UNINIT;
+ }
+
+ // operation type: updating
+ public void setNull() {
+ this.stateUpdating = INIT_STATE_NULL;
+ if (this.updatingDirty && this.storageUpdating != null) {
+ freeBytes(this.storageUpdating);
+ }
+ this.storageUpdating = null;
+ this.updatingDirty = false;
+ }
+
+ // operation type: updating
+ public void setUninitialised() {
+ this.stateUpdating = INIT_STATE_UNINIT;
+ if (this.storageUpdating != null && this.updatingDirty) {
+ freeBytes(this.storageUpdating);
+ }
+ this.storageUpdating = null;
+ this.updatingDirty = false;
+ }
+
+ // operation type: updating
+ public void setHidden() {
+ if (this.stateUpdating == INIT_STATE_HIDDEN) {
+ return;
+ }
+ if (this.stateUpdating != INIT_STATE_INIT) {
+ this.setNull();
+ } else {
+ this.stateUpdating = INIT_STATE_HIDDEN;
+ }
+ }
+
+ // operation type: updating
+ public boolean isDirty() {
+ return this.stateUpdating != this.stateVisible || this.updatingDirty;
+ }
+
+ // operation type: updating
+ public boolean isNullNibbleUpdating() {
+ return this.stateUpdating == INIT_STATE_NULL;
+ }
+
+ // operation type: visible
+ public boolean isNullNibbleVisible() {
+ return this.stateVisible == INIT_STATE_NULL;
+ }
+
+ // opeartion type: updating
+ public boolean isUninitialisedUpdating() {
+ return this.stateUpdating == INIT_STATE_UNINIT;
+ }
+
+ // operation type: visible
+ public boolean isUninitialisedVisible() {
+ return this.stateVisible == INIT_STATE_UNINIT;
+ }
+
+ // operation type: updating
+ public boolean isInitialisedUpdating() {
+ return this.stateUpdating == INIT_STATE_INIT;
+ }
+
+ // operation type: visible
+ public boolean isInitialisedVisible() {
+ return this.stateVisible == INIT_STATE_INIT;
+ }
+
+ // operation type: updating
+ public boolean isHiddenUpdating() {
+ return this.stateUpdating == INIT_STATE_HIDDEN;
+ }
+
+ // operation type: updating
+ public boolean isHiddenVisible() {
+ return this.stateVisible == INIT_STATE_HIDDEN;
+ }
+
+ // operation type: updating
+ protected void swapUpdatingAndMarkDirty() {
+ if (this.updatingDirty) {
+ return;
+ }
+
+ if (this.storageUpdating == null) {
+ this.storageUpdating = allocateBytes();
+ Arrays.fill(this.storageUpdating, (byte)0);
+ } else {
+ System.arraycopy(this.storageUpdating, 0, this.storageUpdating = allocateBytes(), 0, ARRAY_SIZE);
+ }
+
+ if (this.stateUpdating != INIT_STATE_HIDDEN) {
+ this.stateUpdating = INIT_STATE_INIT;
+ }
+ this.updatingDirty = true;
+ }
+
+ // operation type: updating
+ public boolean updateVisible() {
+ if (!this.isDirty()) {
+ return false;
+ }
+
+ synchronized (this) {
+ if (this.stateUpdating == INIT_STATE_NULL || this.stateUpdating == INIT_STATE_UNINIT) {
+ this.storageVisible = null;
+ } else {
+ if (this.storageVisible == null) {
+ this.storageVisible = this.storageUpdating.clone();
+ } else {
+ if (this.storageUpdating != this.storageVisible) {
+ System.arraycopy(this.storageUpdating, 0, this.storageVisible, 0, ARRAY_SIZE);
+ }
+ }
+
+ if (this.storageUpdating != this.storageVisible) {
+ freeBytes(this.storageUpdating);
+ }
+ this.storageUpdating = this.storageVisible;
+ }
+ this.updatingDirty = false;
+ this.stateVisible = this.stateUpdating;
+ }
+
+ return true;
+ }
+
+ // operation type: visible
+ public DataLayer toVanillaNibble() {
+ synchronized (this) {
+ switch (this.stateVisible) {
+ case INIT_STATE_HIDDEN:
+ case INIT_STATE_NULL:
+ return null;
+ case INIT_STATE_UNINIT:
+ return new DataLayer();
+ case INIT_STATE_INIT:
+ return new DataLayer(this.storageVisible.clone());
+ default:
+ throw new IllegalStateException();
+ }
+ }
+ }
+
+ /* x | (z << 4) | (y << 8) */
+
+ // operation type: updating
+ public int getUpdating(final int x, final int y, final int z) {
+ return this.getUpdating((x & 15) | ((z & 15) << 4) | ((y & 15) << 8));
+ }
+
+ // operation type: updating
+ public int getUpdating(final int index) {
+ // indices range from 0 -> 4096
+ final byte[] bytes = this.storageUpdating;
+ if (bytes == null) {
+ return 0;
+ }
+ final byte value = bytes[index >>> 1];
+
+ // if we are an even index, we want lower 4 bits
+ // if we are an odd index, we want upper 4 bits
+ return ((value >>> ((index & 1) << 2)) & 0xF);
+ }
+
+ // operation type: visible
+ public int getVisible(final int x, final int y, final int z) {
+ return this.getVisible((x & 15) | ((z & 15) << 4) | ((y & 15) << 8));
+ }
+
+ // operation type: visible
+ public int getVisible(final int index) {
+ // indices range from 0 -> 4096
+ final byte[] visibleBytes = this.storageVisible;
+ if (visibleBytes == null) {
+ return 0;
+ }
+ final byte value = visibleBytes[index >>> 1];
+
+ // if we are an even index, we want lower 4 bits
+ // if we are an odd index, we want upper 4 bits
+ return ((value >>> ((index & 1) << 2)) & 0xF);
+ }
+
+ // operation type: updating
+ public void set(final int x, final int y, final int z, final int value) {
+ this.set((x & 15) | ((z & 15) << 4) | ((y & 15) << 8), value);
+ }
+
+ // operation type: updating
+ public void set(final int index, final int value) {
+ if (!this.updatingDirty) {
+ this.swapUpdatingAndMarkDirty();
+ }
+ final int shift = (index & 1) << 2;
+ final int i = index >>> 1;
+
+ this.storageUpdating[i] = (byte)((this.storageUpdating[i] & (0xF0 >>> shift)) | (value << shift));
+ }
+
+ public static final class SaveState {
+
+ public final byte[] data;
+ public final int state;
+
+ public SaveState(final byte[] data, final int state) {
+ this.data = data;
+ this.state = state;
+ }
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/SkyStarLightEngine.java b/src/main/java/ca/spottedleaf/starlight/common/light/SkyStarLightEngine.java
new file mode 100644
index 0000000000000000000000000000000000000000..5f771962afb44175d446f138c8e7453230f48c6c
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/light/SkyStarLightEngine.java
@@ -0,0 +1,709 @@
+package ca.spottedleaf.starlight.common.light;
+
+import ca.spottedleaf.starlight.common.util.WorldUtil;
+import it.unimi.dsi.fastutil.shorts.ShortCollection;
+import it.unimi.dsi.fastutil.shorts.ShortIterator;
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.level.BlockGetter;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.LevelChunkSection;
+import net.minecraft.world.level.chunk.LightChunkGetter;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
+import java.util.Arrays;
+import java.util.Set;
+
+public final class SkyStarLightEngine extends StarLightEngine {
+
+ /*
+ Specification for managing the initialisation and de-initialisation of skylight nibble arrays:
+
+ Skylight nibble initialisation requires that non-empty chunk sections have 1 radius nibbles non-null.
+
+ This presents some problems, as vanilla is only guaranteed to have 0 radius neighbours loaded when editing blocks.
+ However starlight fixes this so that it has 1 radius loaded. Still, we don't actually have guarantees
+ that we have the necessary chunks loaded to de-initialise neighbour sections (but we do have enough to de-initialise
+ our own) - we need a radius of 2 to de-initialise neighbour nibbles.
+ How do we solve this?
+
+ Each chunk will store the last known "emptiness" of sections for each of their 1 radius neighbour chunk sections.
+ If the chunk does not have full data, then its nibbles are NOT de-initialised. This is because obviously the
+ chunk did not go through the light stage yet - or its neighbours are not lit. In either case, once the last
+ known "emptiness" of neighbouring sections is filled with data, the chunk will run a full check of the data
+ to see if any of its nibbles need to be de-initialised.
+
+ The emptiness map allows us to de-initialise neighbour nibbles if the neighbour has it filled with data,
+ and if it doesn't have data then we know it will correctly de-initialise once it fills up.
+
+ Unlike vanilla, we store whether nibbles are uninitialised on disk - so we don't need any dumb hacking
+ around those.
+ */
+
+ protected final int[] heightMapBlockChange = new int[16 * 16];
+ {
+ Arrays.fill(this.heightMapBlockChange, Integer.MIN_VALUE); // clear heightmap
+ }
+
+ protected final boolean[] nullPropagationCheckCache;
+
+ public SkyStarLightEngine(final Level world) {
+ super(true, world);
+ this.nullPropagationCheckCache = new boolean[WorldUtil.getTotalLightSections(world)];
+ }
+
+ @Override
+ protected void initNibble(final int chunkX, final int chunkY, final int chunkZ, final boolean extrude, final boolean initRemovedNibbles) {
+ if (chunkY < this.minLightSection || chunkY > this.maxLightSection || this.getChunkInCache(chunkX, chunkZ) == null) {
+ return;
+ }
+ SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ if (nibble == null) {
+ if (!initRemovedNibbles) {
+ throw new IllegalStateException();
+ } else {
+ this.setNibbleInCache(chunkX, chunkY, chunkZ, nibble = new SWMRNibbleArray(null, true));
+ }
+ }
+ this.initNibble(nibble, chunkX, chunkY, chunkZ, extrude);
+ }
+
+ @Override
+ protected void setNibbleNull(final int chunkX, final int chunkY, final int chunkZ) {
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ if (nibble != null) {
+ nibble.setNull();
+ }
+ }
+
+ protected final void initNibble(final SWMRNibbleArray currNibble, final int chunkX, final int chunkY, final int chunkZ, final boolean extrude) {
+ if (!currNibble.isNullNibbleUpdating()) {
+ // already initialised
+ return;
+ }
+
+ final boolean[] emptinessMap = this.getEmptinessMap(chunkX, chunkZ);
+
+ // are we above this chunk's lowest empty section?
+ int lowestY = this.minLightSection - 1;
+ for (int currY = this.maxSection; currY >= this.minSection; --currY) {
+ if (emptinessMap == null) {
+ // cannot delay nibble init for lit chunks, as we need to init to propagate into them.
+ final LevelChunkSection current = this.getChunkSection(chunkX, currY, chunkZ);
+ if (current == null || current.hasOnlyAir()) {
+ continue;
+ }
+ } else {
+ if (emptinessMap[currY - this.minSection]) {
+ continue;
+ }
+ }
+
+ // should always be full lit here
+ lowestY = currY;
+ break;
+ }
+
+ if (chunkY > lowestY) {
+ // we need to set this one to full
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ nibble.setNonNull();
+ nibble.setFull();
+ return;
+ }
+
+ if (extrude) {
+ // this nibble is going to depend solely on the skylight data above it
+ // find first non-null data above (there does exist one, as we just found it above)
+ for (int currY = chunkY + 1; currY <= this.maxLightSection; ++currY) {
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, currY, chunkZ);
+ if (nibble != null && !nibble.isNullNibbleUpdating()) {
+ currNibble.setNonNull();
+ currNibble.extrudeLower(nibble);
+ break;
+ }
+ }
+ } else {
+ currNibble.setNonNull();
+ }
+ }
+
+ protected final void rewriteNibbleCacheForSkylight(final ChunkAccess chunk) {
+ for (int index = 0, max = this.nibbleCache.length; index < max; ++index) {
+ final SWMRNibbleArray nibble = this.nibbleCache[index];
+ if (nibble != null && nibble.isNullNibbleUpdating()) {
+ // stop propagation in these areas
+ this.nibbleCache[index] = null;
+ nibble.updateVisible();
+ }
+ }
+ }
+
+ // rets whether neighbours were init'd
+
+ protected final boolean checkNullSection(final int chunkX, final int chunkY, final int chunkZ,
+ final boolean extrudeInitialised) {
+ // null chunk sections may have nibble neighbours in the horizontal 1 radius that are
+ // non-null. Propagation to these neighbours is necessary.
+ // What makes this easy is we know none of these neighbours are non-empty (otherwise
+ // this nibble would be initialised). So, we don't have to initialise
+ // the neighbours in the full 1 radius, because there's no worry that any "paths"
+ // to the neighbours on this horizontal plane are blocked.
+ if (chunkY < this.minLightSection || chunkY > this.maxLightSection || this.nullPropagationCheckCache[chunkY - this.minLightSection]) {
+ return false;
+ }
+ this.nullPropagationCheckCache[chunkY - this.minLightSection] = true;
+
+ // check horizontal neighbours
+ boolean needInitNeighbours = false;
+ neighbour_search:
+ for (int dz = -1; dz <= 1; ++dz) {
+ for (int dx = -1; dx <= 1; ++dx) {
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(dx + chunkX, chunkY, dz + chunkZ);
+ if (nibble != null && !nibble.isNullNibbleUpdating()) {
+ needInitNeighbours = true;
+ break neighbour_search;
+ }
+ }
+ }
+
+ if (needInitNeighbours) {
+ for (int dz = -1; dz <= 1; ++dz) {
+ for (int dx = -1; dx <= 1; ++dx) {
+ this.initNibble(dx + chunkX, chunkY, dz + chunkZ, (dx | dz) == 0 ? extrudeInitialised : true, true);
+ }
+ }
+ }
+
+ return needInitNeighbours;
+ }
+
+ protected final int getLightLevelExtruded(final int worldX, final int worldY, final int worldZ) {
+ final int chunkX = worldX >> 4;
+ int chunkY = worldY >> 4;
+ final int chunkZ = worldZ >> 4;
+
+ SWMRNibbleArray nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ if (nibble != null) {
+ return nibble.getUpdating(worldX, worldY, worldZ);
+ }
+
+ for (;;) {
+ if (++chunkY > this.maxLightSection) {
+ return 15;
+ }
+
+ nibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+
+ if (nibble != null) {
+ return nibble.getUpdating(worldX, 0, worldZ);
+ }
+ }
+ }
+
+ @Override
+ protected boolean[] getEmptinessMap(final ChunkAccess chunk) {
+ return chunk.getSkyEmptinessMap();
+ }
+
+ @Override
+ protected void setEmptinessMap(final ChunkAccess chunk, final boolean[] to) {
+ chunk.setSkyEmptinessMap(to);
+ }
+
+ @Override
+ protected SWMRNibbleArray[] getNibblesOnChunk(final ChunkAccess chunk) {
+ return chunk.getSkyNibbles();
+ }
+
+ @Override
+ protected void setNibbles(final ChunkAccess chunk, final SWMRNibbleArray[] to) {
+ chunk.setSkyNibbles(to);
+ }
+
+ @Override
+ protected boolean canUseChunk(final ChunkAccess chunk) {
+ // can only use chunks for sky stuff if their sections have been init'd
+ return chunk.getStatus().isOrAfter(ChunkStatus.LIGHT) && (this.isClientSide || chunk.isLightCorrect());
+ }
+
+ @Override
+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final int fromSection,
+ final int toSection) {
+ Arrays.fill(this.nullPropagationCheckCache, false);
+ this.rewriteNibbleCacheForSkylight(chunk);
+ final int chunkX = chunk.getPos().x;
+ final int chunkZ = chunk.getPos().z;
+ for (int y = toSection; y >= fromSection; --y) {
+ this.checkNullSection(chunkX, y, chunkZ, true);
+ }
+
+ super.checkChunkEdges(lightAccess, chunk, fromSection, toSection);
+ }
+
+ @Override
+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final ShortCollection sections) {
+ Arrays.fill(this.nullPropagationCheckCache, false);
+ this.rewriteNibbleCacheForSkylight(chunk);
+ final int chunkX = chunk.getPos().x;
+ final int chunkZ = chunk.getPos().z;
+ for (final ShortIterator iterator = sections.iterator(); iterator.hasNext();) {
+ final int y = (int)iterator.nextShort();
+ this.checkNullSection(chunkX, y, chunkZ, true);
+ }
+
+ super.checkChunkEdges(lightAccess, chunk, sections);
+ }
+
+ @Override
+ protected void checkBlock(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ) {
+ // blocks can change opacity
+ // blocks can change direction of propagation
+
+ // same logic applies from BlockStarLightEngine#checkBlock
+
+ final int encodeOffset = this.coordinateOffset;
+
+ final int currentLevel = this.getLightLevel(worldX, worldY, worldZ);
+
+ if (currentLevel == 15) {
+ // must re-propagate clobbered source
+ this.appendToIncreaseQueue(
+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (currentLevel & 0xFL) << (6 + 6 + 16)
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS // don't know if the block is conditionally transparent
+ );
+ } else {
+ this.setLightLevel(worldX, worldY, worldZ, 0);
+ }
+
+ this.appendToDecreaseQueue(
+ ((worldX + (worldZ << 6) + (worldY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (currentLevel & 0xFL) << (6 + 6 + 16)
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ );
+ }
+
+ protected final BlockPos.MutableBlockPos recalcCenterPos = new BlockPos.MutableBlockPos();
+ protected final BlockPos.MutableBlockPos recalcNeighbourPos = new BlockPos.MutableBlockPos();
+
+ @Override
+ protected int calculateLightValue(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ,
+ final int expect) {
+ if (expect == 15) {
+ return expect;
+ }
+
+ final int sectionOffset = this.chunkSectionIndexOffset;
+ final BlockState centerState = this.getBlockState(worldX, worldY, worldZ);
+ int opacity = centerState.getOpacityIfCached();
+
+ final BlockState conditionallyOpaqueState;
+ if (opacity < 0) {
+ this.recalcCenterPos.set(worldX, worldY, worldZ);
+ opacity = Math.max(1, centerState.getLightBlock(lightAccess.getLevel(), this.recalcCenterPos));
+ if (centerState.isConditionallyFullOpaque()) {
+ conditionallyOpaqueState = centerState;
+ } else {
+ conditionallyOpaqueState = null;
+ }
+ } else {
+ conditionallyOpaqueState = null;
+ opacity = Math.max(1, opacity);
+ }
+
+ int level = 0;
+
+ for (final AxisDirection direction : AXIS_DIRECTIONS) {
+ final int offX = worldX + direction.x;
+ final int offY = worldY + direction.y;
+ final int offZ = worldZ + direction.z;
+
+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset;
+
+ final int neighbourLevel = this.getLightLevel(sectionIndex, (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8));
+
+ if ((neighbourLevel - 1) <= level) {
+ // don't need to test transparency, we know it wont affect the result.
+ continue;
+ }
+
+ final BlockState neighbourState = this.getBlockState(offX, offY, offZ);
+
+ if (neighbourState.isConditionallyFullOpaque()) {
+ // here the block can be conditionally opaque (i.e light cannot propagate from it), so we need to test that
+ // we don't read the blockstate because most of the time this is false, so using the faster
+ // known transparency lookup results in a net win
+ this.recalcNeighbourPos.set(offX, offY, offZ);
+ final VoxelShape neighbourFace = neighbourState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcNeighbourPos, direction.opposite.nms);
+ final VoxelShape thisFace = conditionallyOpaqueState == null ? Shapes.empty() : conditionallyOpaqueState.getFaceOcclusionShape(lightAccess.getLevel(), this.recalcCenterPos, direction.nms);
+ if (Shapes.faceShapeOccludes(thisFace, neighbourFace)) {
+ // not allowed to propagate
+ continue;
+ }
+ }
+
+ final int calculated = neighbourLevel - opacity;
+ level = Math.max(calculated, level);
+ if (level > expect) {
+ return level;
+ }
+ }
+
+ return level;
+ }
+
+ @Override
+ protected void propagateBlockChanges(final LightChunkGetter lightAccess, final ChunkAccess atChunk, final Set<BlockPos> positions) {
+ this.rewriteNibbleCacheForSkylight(atChunk);
+ Arrays.fill(this.nullPropagationCheckCache, false);
+
+ final BlockGetter world = lightAccess.getLevel();
+ final int chunkX = atChunk.getPos().x;
+ final int chunkZ = atChunk.getPos().z;
+ final int heightMapOffset = chunkX * -16 + (chunkZ * (-16 * 16));
+
+ // setup heightmap for changes
+ for (final BlockPos pos : positions) {
+ final int index = pos.getX() + (pos.getZ() << 4) + heightMapOffset;
+ final int curr = this.heightMapBlockChange[index];
+ if (pos.getY() > curr) {
+ this.heightMapBlockChange[index] = pos.getY();
+ }
+ }
+
+ // note: light sets are delayed while processing skylight source changes due to how
+ // nibbles are initialised, as we want to avoid clobbering nibble values so what when
+ // below nibbles are initialised they aren't reading from partially modified nibbles
+
+ // now we can recalculate the sources for the changed columns
+ for (int index = 0; index < (16 * 16); ++index) {
+ final int maxY = this.heightMapBlockChange[index];
+ if (maxY == Integer.MIN_VALUE) {
+ // not changed
+ continue;
+ }
+ this.heightMapBlockChange[index] = Integer.MIN_VALUE; // restore default for next caller
+
+ final int columnX = (index & 15) | (chunkX << 4);
+ final int columnZ = (index >>> 4) | (chunkZ << 4);
+
+ // try and propagate from the above y
+ // delay light set until after processing all sources to setup
+ final int maxPropagationY = this.tryPropagateSkylight(world, columnX, maxY, columnZ, true, true);
+
+ // maxPropagationY is now the highest block that could not be propagated to
+
+ // remove all sources below that are 15
+ final long propagateDirection = AxisDirection.POSITIVE_Y.everythingButThisDirection;
+ final int encodeOffset = this.coordinateOffset;
+
+ if (this.getLightLevelExtruded(columnX, maxPropagationY, columnZ) == 15) {
+ // ensure section is checked
+ this.checkNullSection(columnX >> 4, maxPropagationY >> 4, columnZ >> 4, true);
+
+ for (int currY = maxPropagationY; currY >= (this.minLightSection << 4); --currY) {
+ if ((currY & 15) == 15) {
+ // ensure section is checked
+ this.checkNullSection(columnX >> 4, (currY >> 4), columnZ >> 4, true);
+ }
+
+ // ensure section below is always checked
+ final SWMRNibbleArray nibble = this.getNibbleFromCache(columnX >> 4, currY >> 4, columnZ >> 4);
+ if (nibble == null) {
+ // advance currY to the the top of the section below
+ currY = (currY) & (~15);
+ // note: this value ^ is actually 1 above the top, but the loop decrements by 1 so we actually
+ // end up there
+ continue;
+ }
+
+ if (nibble.getUpdating(columnX, currY, columnZ) != 15) {
+ break;
+ }
+
+ // delay light set until after processing all sources to setup
+ this.appendToDecreaseQueue(
+ ((columnX + (columnZ << 6) + (currY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (15L << (6 + 6 + 16))
+ | (propagateDirection << (6 + 6 + 16 + 4))
+ // do not set transparent blocks for the same reason we don't in the checkBlock method
+ );
+ }
+ }
+ }
+
+ // delayed light sets are processed here, and must be processed before checkBlock as checkBlock reads
+ // immediate light value
+ this.processDelayedIncreases();
+ this.processDelayedDecreases();
+
+ for (final BlockPos pos : positions) {
+ this.checkBlock(lightAccess, pos.getX(), pos.getY(), pos.getZ());
+ }
+
+ this.performLightDecrease(lightAccess);
+ }
+
+ protected final int[] heightMapGen = new int[32 * 32];
+
+ @Override
+ protected void lightChunk(final LightChunkGetter lightAccess, final ChunkAccess chunk, final boolean needsEdgeChecks) {
+ this.rewriteNibbleCacheForSkylight(chunk);
+ Arrays.fill(this.nullPropagationCheckCache, false);
+
+ final BlockGetter world = lightAccess.getLevel();
+ final ChunkPos chunkPos = chunk.getPos();
+ final int chunkX = chunkPos.x;
+ final int chunkZ = chunkPos.z;
+
+ final LevelChunkSection[] sections = chunk.getSections();
+
+ int highestNonEmptySection = this.maxSection;
+ while (highestNonEmptySection == (this.minSection - 1) ||
+ sections[highestNonEmptySection - this.minSection] == null || sections[highestNonEmptySection - this.minSection].hasOnlyAir()) {
+ this.checkNullSection(chunkX, highestNonEmptySection, chunkZ, false);
+ // try propagate FULL to neighbours
+
+ // check neighbours to see if we need to propagate into them
+ for (final AxisDirection direction : ONLY_HORIZONTAL_DIRECTIONS) {
+ final int neighbourX = chunkX + direction.x;
+ final int neighbourZ = chunkZ + direction.z;
+ final SWMRNibbleArray neighbourNibble = this.getNibbleFromCache(neighbourX, highestNonEmptySection, neighbourZ);
+ if (neighbourNibble == null) {
+ // unloaded neighbour
+ // most of the time we fall here
+ continue;
+ }
+
+ // it looks like we need to propagate into the neighbour
+
+ final int incX;
+ final int incZ;
+ final int startX;
+ final int startZ;
+
+ if (direction.x != 0) {
+ // x direction
+ incX = 0;
+ incZ = 1;
+
+ if (direction.x < 0) {
+ // negative
+ startX = chunkX << 4;
+ } else {
+ startX = chunkX << 4 | 15;
+ }
+ startZ = chunkZ << 4;
+ } else {
+ // z direction
+ incX = 1;
+ incZ = 0;
+
+ if (direction.z < 0) {
+ // negative
+ startZ = chunkZ << 4;
+ } else {
+ startZ = chunkZ << 4 | 15;
+ }
+ startX = chunkX << 4;
+ }
+
+ final int encodeOffset = this.coordinateOffset;
+ final long propagateDirection = 1L << direction.ordinal(); // we only want to check in this direction
+
+ for (int currY = highestNonEmptySection << 4, maxY = currY | 15; currY <= maxY; ++currY) {
+ for (int i = 0, currX = startX, currZ = startZ; i < 16; ++i, currX += incX, currZ += incZ) {
+ this.appendToIncreaseQueue(
+ ((currX + (currZ << 6) + (currY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (15L << (6 + 6 + 16)) // we know we're at full lit here
+ | (propagateDirection << (6 + 6 + 16 + 4))
+ // no transparent flag, we know for a fact there are no blocks here that could be directionally transparent (as the section is EMPTY)
+ );
+ }
+ }
+ }
+
+ if (highestNonEmptySection-- == (this.minSection - 1)) {
+ break;
+ }
+ }
+
+ if (highestNonEmptySection >= this.minSection) {
+ // fill out our other sources
+ final int minX = chunkPos.x << 4;
+ final int maxX = chunkPos.x << 4 | 15;
+ final int minZ = chunkPos.z << 4;
+ final int maxZ = chunkPos.z << 4 | 15;
+ final int startY = highestNonEmptySection << 4 | 15;
+ for (int currZ = minZ; currZ <= maxZ; ++currZ) {
+ for (int currX = minX; currX <= maxX; ++currX) {
+ this.tryPropagateSkylight(world, currX, startY + 1, currZ, false, false);
+ }
+ }
+ } // else: apparently the chunk is empty
+
+ if (needsEdgeChecks) {
+ // not required to propagate here, but this will reduce the hit of the edge checks
+ this.performLightIncrease(lightAccess);
+
+ for (int y = highestNonEmptySection; y >= this.minLightSection; --y) {
+ this.checkNullSection(chunkX, y, chunkZ, false);
+ }
+ // no need to rewrite the nibble cache again
+ super.checkChunkEdges(lightAccess, chunk, this.minLightSection, highestNonEmptySection);
+ } else {
+ for (int y = highestNonEmptySection; y >= this.minLightSection; --y) {
+ this.checkNullSection(chunkX, y, chunkZ, false);
+ }
+ this.propagateNeighbourLevels(lightAccess, chunk, this.minLightSection, highestNonEmptySection);
+
+ this.performLightIncrease(lightAccess);
+ }
+ }
+
+ protected final void processDelayedIncreases() {
+ // copied from performLightIncrease
+ final long[] queue = this.increaseQueue;
+ final int decodeOffsetX = -this.encodeOffsetX;
+ final int decodeOffsetY = -this.encodeOffsetY;
+ final int decodeOffsetZ = -this.encodeOffsetZ;
+
+ for (int i = 0, len = this.increaseQueueInitialLength; i < len; ++i) {
+ final long queueValue = queue[i];
+
+ final int posX = ((int)queueValue & 63) + decodeOffsetX;
+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ;
+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY;
+ final int propagatedLightLevel = (int)((queueValue >>> (6 + 6 + 16)) & 0xF);
+
+ this.setLightLevel(posX, posY, posZ, propagatedLightLevel);
+ }
+ }
+
+ protected final void processDelayedDecreases() {
+ // copied from performLightDecrease
+ final long[] queue = this.decreaseQueue;
+ final int decodeOffsetX = -this.encodeOffsetX;
+ final int decodeOffsetY = -this.encodeOffsetY;
+ final int decodeOffsetZ = -this.encodeOffsetZ;
+
+ for (int i = 0, len = this.decreaseQueueInitialLength; i < len; ++i) {
+ final long queueValue = queue[i];
+
+ final int posX = ((int)queueValue & 63) + decodeOffsetX;
+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ;
+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY;
+
+ this.setLightLevel(posX, posY, posZ, 0);
+ }
+ }
+
+ // delaying the light set is useful for block changes since they need to worry about initialising nibblearrays
+ // while also queueing light at the same time (initialising nibblearrays might depend on nibbles above, so
+ // clobbering the light values will result in broken propagation)
+ protected final int tryPropagateSkylight(final BlockGetter world, final int worldX, int startY, final int worldZ,
+ final boolean extrudeInitialised, final boolean delayLightSet) {
+ final BlockPos.MutableBlockPos mutablePos = this.mutablePos3;
+ final int encodeOffset = this.coordinateOffset;
+ final long propagateDirection = AxisDirection.POSITIVE_Y.everythingButThisDirection; // just don't check upwards.
+
+ if (this.getLightLevelExtruded(worldX, startY + 1, worldZ) != 15) {
+ return startY;
+ }
+
+ // ensure this section is always checked
+ this.checkNullSection(worldX >> 4, startY >> 4, worldZ >> 4, extrudeInitialised);
+
+ BlockState above = this.getBlockState(worldX, startY + 1, worldZ);
+
+ for (;startY >= (this.minLightSection << 4); --startY) {
+ if ((startY & 15) == 15) {
+ // ensure this section is always checked
+ this.checkNullSection(worldX >> 4, startY >> 4, worldZ >> 4, extrudeInitialised);
+ }
+ final BlockState current = this.getBlockState(worldX, startY, worldZ);
+
+ final VoxelShape fromShape;
+ if (above.isConditionallyFullOpaque()) {
+ this.mutablePos2.set(worldX, startY + 1, worldZ);
+ fromShape = above.getFaceOcclusionShape(world, this.mutablePos2, AxisDirection.NEGATIVE_Y.nms);
+ if (Shapes.faceShapeOccludes(Shapes.empty(), fromShape)) {
+ // above wont let us propagate
+ break;
+ }
+ } else {
+ fromShape = Shapes.empty();
+ }
+
+ final int opacityIfCached = current.getOpacityIfCached();
+ // does light propagate from the top down?
+ if (opacityIfCached != -1) {
+ if (opacityIfCached != 0) {
+ // we cannot propagate 15 through this
+ break;
+ }
+ // most of the time it falls here.
+ // add to propagate
+ // light set delayed until we determine if this nibble section is null
+ this.appendToIncreaseQueue(
+ ((worldX + (worldZ << 6) + (startY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (15L << (6 + 6 + 16)) // we know we're at full lit here
+ | (propagateDirection << (6 + 6 + 16 + 4))
+ );
+ } else {
+ mutablePos.set(worldX, startY, worldZ);
+ long flags = 0L;
+ if (current.isConditionallyFullOpaque()) {
+ final VoxelShape cullingFace = current.getFaceOcclusionShape(world, mutablePos, AxisDirection.POSITIVE_Y.nms);
+
+ if (Shapes.faceShapeOccludes(fromShape, cullingFace)) {
+ // can't propagate here, we're done on this column.
+ break;
+ }
+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS;
+ }
+
+ final int opacity = current.getLightBlock(world, mutablePos);
+ if (opacity > 0) {
+ // let the queued value (if any) handle it from here.
+ break;
+ }
+
+ // light set delayed until we determine if this nibble section is null
+ this.appendToIncreaseQueue(
+ ((worldX + (worldZ << 6) + (startY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | (15L << (6 + 6 + 16)) // we know we're at full lit here
+ | (propagateDirection << (6 + 6 + 16 + 4))
+ | flags
+ );
+ }
+
+ above = current;
+
+ if (this.getNibbleFromCache(worldX >> 4, startY >> 4, worldZ >> 4) == null) {
+ // we skip empty sections here, as this is just an easy way of making sure the above block
+ // can propagate through air.
+
+ // nothing can propagate in null sections, remove the queue entry for it
+ --this.increaseQueueInitialLength;
+
+ // advance currY to the the top of the section below
+ startY = (startY) & (~15);
+ // note: this value ^ is actually 1 above the top, but the loop decrements by 1 so we actually
+ // end up there
+
+ // make sure this is marked as AIR
+ above = AIR_BLOCK_STATE;
+ } else if (!delayLightSet) {
+ this.setLightLevel(worldX, startY, worldZ, 15);
+ }
+ }
+
+ return startY;
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightEngine.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightEngine.java
new file mode 100644
index 0000000000000000000000000000000000000000..1b0d92c68407cdb09ed8aac271b625d92db87017
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightEngine.java
@@ -0,0 +1,1572 @@
+package ca.spottedleaf.starlight.common.light;
+
+import ca.spottedleaf.starlight.common.util.CoordinateUtils;
+import ca.spottedleaf.starlight.common.util.IntegerUtil;
+import ca.spottedleaf.starlight.common.util.WorldUtil;
+import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.shorts.ShortCollection;
+import it.unimi.dsi.fastutil.shorts.ShortIterator;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.core.SectionPos;
+import net.minecraft.world.level.BlockGetter;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.LevelHeightAccessor;
+import net.minecraft.world.level.LightLayer;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.LevelChunkSection;
+import net.minecraft.world.level.chunk.LightChunkGetter;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.function.IntConsumer;
+
+public abstract class StarLightEngine {
+
+ protected static final BlockState AIR_BLOCK_STATE = Blocks.AIR.defaultBlockState();
+
+ protected static final AxisDirection[] DIRECTIONS = AxisDirection.values();
+ protected static final AxisDirection[] AXIS_DIRECTIONS = DIRECTIONS;
+ protected static final AxisDirection[] ONLY_HORIZONTAL_DIRECTIONS = new AxisDirection[] {
+ AxisDirection.POSITIVE_X, AxisDirection.NEGATIVE_X,
+ AxisDirection.POSITIVE_Z, AxisDirection.NEGATIVE_Z
+ };
+
+ protected static enum AxisDirection {
+
+ // Declaration order is important and relied upon. Do not change without modifying propagation code.
+ POSITIVE_X(1, 0, 0), NEGATIVE_X(-1, 0, 0),
+ POSITIVE_Z(0, 0, 1), NEGATIVE_Z(0, 0, -1),
+ POSITIVE_Y(0, 1, 0), NEGATIVE_Y(0, -1, 0);
+
+ static {
+ POSITIVE_X.opposite = NEGATIVE_X; NEGATIVE_X.opposite = POSITIVE_X;
+ POSITIVE_Z.opposite = NEGATIVE_Z; NEGATIVE_Z.opposite = POSITIVE_Z;
+ POSITIVE_Y.opposite = NEGATIVE_Y; NEGATIVE_Y.opposite = POSITIVE_Y;
+ }
+
+ protected AxisDirection opposite;
+
+ public final int x;
+ public final int y;
+ public final int z;
+ public final Direction nms;
+ public final long everythingButThisDirection;
+ public final long everythingButTheOppositeDirection;
+
+ AxisDirection(final int x, final int y, final int z) {
+ this.x = x;
+ this.y = y;
+ this.z = z;
+ this.nms = Direction.fromNormal(x, y, z);
+ this.everythingButThisDirection = (long)(ALL_DIRECTIONS_BITSET ^ (1 << this.ordinal()));
+ // positive is always even, negative is always odd. Flip the 1 bit to get the negative direction.
+ this.everythingButTheOppositeDirection = (long)(ALL_DIRECTIONS_BITSET ^ (1 << (this.ordinal() ^ 1)));
+ }
+
+ public AxisDirection getOpposite() {
+ return this.opposite;
+ }
+ }
+
+ // I'd like to thank https://www.seedofandromeda.com/blogs/29-fast-flood-fill-lighting-in-a-blocky-voxel-game-pt-1
+ // for explaining how light propagates via breadth-first search
+
+ // While the above is a good start to understanding the general idea of what the general principles are, it's not
+ // exactly how the vanilla light engine should behave for minecraft.
+
+ // similar to the above, except the chunk section indices vary from [-1, 1], or [0, 2]
+ // for the y chunk section it's from [minLightSection, maxLightSection] or [0, maxLightSection - minLightSection]
+ // index = x + (z * 5) + (y * 25)
+ // null index indicates the chunk section doesn't exist (empty or out of bounds)
+ protected final LevelChunkSection[] sectionCache;
+
+ // the exact same as above, except for storing fast access to SWMRNibbleArray
+ // for the y chunk section it's from [minLightSection, maxLightSection] or [0, maxLightSection - minLightSection]
+ // index = x + (z * 5) + (y * 25)
+ protected final SWMRNibbleArray[] nibbleCache;
+
+ // the exact same as above, except for storing fast access to nibbles to call change callbacks for
+ // for the y chunk section it's from [minLightSection, maxLightSection] or [0, maxLightSection - minLightSection]
+ // index = x + (z * 5) + (y * 25)
+ protected final boolean[] notifyUpdateCache;
+
+ // always initialsed during start of lighting.
+ // index = x + (z * 5)
+ protected final ChunkAccess[] chunkCache = new ChunkAccess[5 * 5];
+
+ // index = x + (z * 5)
+ protected final boolean[][] emptinessMapCache = new boolean[5 * 5][];
+
+ protected final BlockPos.MutableBlockPos mutablePos1 = new BlockPos.MutableBlockPos();
+ protected final BlockPos.MutableBlockPos mutablePos2 = new BlockPos.MutableBlockPos();
+ protected final BlockPos.MutableBlockPos mutablePos3 = new BlockPos.MutableBlockPos();
+
+ protected int encodeOffsetX;
+ protected int encodeOffsetY;
+ protected int encodeOffsetZ;
+
+ protected int coordinateOffset;
+
+ protected int chunkOffsetX;
+ protected int chunkOffsetY;
+ protected int chunkOffsetZ;
+
+ protected int chunkIndexOffset;
+ protected int chunkSectionIndexOffset;
+
+ protected final boolean skylightPropagator;
+ protected final int emittedLightMask;
+ protected final boolean isClientSide;
+
+ protected final Level world;
+ protected final int minLightSection;
+ protected final int maxLightSection;
+ protected final int minSection;
+ protected final int maxSection;
+
+ protected StarLightEngine(final boolean skylightPropagator, final Level world) {
+ this.skylightPropagator = skylightPropagator;
+ this.emittedLightMask = skylightPropagator ? 0 : 0xF;
+ this.isClientSide = world.isClientSide;
+ this.world = world;
+ this.minLightSection = WorldUtil.getMinLightSection(world);
+ this.maxLightSection = WorldUtil.getMaxLightSection(world);
+ this.minSection = WorldUtil.getMinSection(world);
+ this.maxSection = WorldUtil.getMaxSection(world);
+
+ this.sectionCache = new LevelChunkSection[5 * 5 * ((this.maxLightSection - this.minLightSection + 1) + 2)]; // add two extra sections for buffer
+ this.nibbleCache = new SWMRNibbleArray[5 * 5 * ((this.maxLightSection - this.minLightSection + 1) + 2)]; // add two extra sections for buffer
+ this.notifyUpdateCache = new boolean[5 * 5 * ((this.maxLightSection - this.minLightSection + 1) + 2)]; // add two extra sections for buffer
+ }
+
+ protected final void setupEncodeOffset(final int centerX, final int centerY, final int centerZ) {
+ // 31 = center + encodeOffset
+ this.encodeOffsetX = 31 - centerX;
+ this.encodeOffsetY = (-(this.minLightSection - 1) << 4); // we want 0 to be the smallest encoded value
+ this.encodeOffsetZ = 31 - centerZ;
+
+ // coordinateIndex = x | (z << 6) | (y << 12)
+ this.coordinateOffset = this.encodeOffsetX + (this.encodeOffsetZ << 6) + (this.encodeOffsetY << 12);
+
+ // 2 = (centerX >> 4) + chunkOffset
+ this.chunkOffsetX = 2 - (centerX >> 4);
+ this.chunkOffsetY = -(this.minLightSection - 1); // lowest should be 0
+ this.chunkOffsetZ = 2 - (centerZ >> 4);
+
+ // chunk index = x + (5 * z)
+ this.chunkIndexOffset = this.chunkOffsetX + (5 * this.chunkOffsetZ);
+
+ // chunk section index = x + (5 * z) + ((5*5) * y)
+ this.chunkSectionIndexOffset = this.chunkIndexOffset + ((5 * 5) * this.chunkOffsetY);
+ }
+
+ protected final void setupCaches(final LightChunkGetter chunkProvider, final int centerX, final int centerY, final int centerZ,
+ final boolean relaxed, final boolean tryToLoadChunksFor2Radius) {
+ final int centerChunkX = centerX >> 4;
+ final int centerChunkY = centerY >> 4;
+ final int centerChunkZ = centerZ >> 4;
+
+ this.setupEncodeOffset(centerChunkX * 16 + 7, centerChunkY * 16 + 7, centerChunkZ * 16 + 7);
+
+ final int radius = tryToLoadChunksFor2Radius ? 2 : 1;
+
+ for (int dz = -radius; dz <= radius; ++dz) {
+ for (int dx = -radius; dx <= radius; ++dx) {
+ final int cx = centerChunkX + dx;
+ final int cz = centerChunkZ + dz;
+ final boolean isTwoRadius = Math.max(IntegerUtil.branchlessAbs(dx), IntegerUtil.branchlessAbs(dz)) == 2;
+ final ChunkAccess chunk = (ChunkAccess)chunkProvider.getChunkForLighting(cx, cz);
+
+ if (chunk == null) {
+ if (relaxed | isTwoRadius) {
+ continue;
+ }
+ throw new IllegalArgumentException("Trying to propagate light update before 1 radius neighbours ready");
+ }
+
+ if (!this.canUseChunk(chunk)) {
+ continue;
+ }
+
+ this.setChunkInCache(cx, cz, chunk);
+ this.setEmptinessMapCache(cx, cz, this.getEmptinessMap(chunk));
+ if (!isTwoRadius) {
+ this.setBlocksForChunkInCache(cx, cz, chunk.getSections());
+ this.setNibblesForChunkInCache(cx, cz, this.getNibblesOnChunk(chunk));
+ }
+ }
+ }
+ }
+
+ protected final ChunkAccess getChunkInCache(final int chunkX, final int chunkZ) {
+ return this.chunkCache[chunkX + 5*chunkZ + this.chunkIndexOffset];
+ }
+
+ protected final void setChunkInCache(final int chunkX, final int chunkZ, final ChunkAccess chunk) {
+ this.chunkCache[chunkX + 5*chunkZ + this.chunkIndexOffset] = chunk;
+ }
+
+ protected final LevelChunkSection getChunkSection(final int chunkX, final int chunkY, final int chunkZ) {
+ return this.sectionCache[chunkX + 5*chunkZ + (5 * 5) * chunkY + this.chunkSectionIndexOffset];
+ }
+
+ protected final void setChunkSectionInCache(final int chunkX, final int chunkY, final int chunkZ, final LevelChunkSection section) {
+ this.sectionCache[chunkX + 5*chunkZ + 5*5*chunkY + this.chunkSectionIndexOffset] = section;
+ }
+
+ protected final void setBlocksForChunkInCache(final int chunkX, final int chunkZ, final LevelChunkSection[] sections) {
+ for (int cy = this.minLightSection; cy <= this.maxLightSection; ++cy) {
+ this.setChunkSectionInCache(chunkX, cy, chunkZ,
+ sections == null ? null : (cy >= this.minSection && cy <= this.maxSection ? sections[cy - this.minSection] : null));
+ }
+ }
+
+ protected final SWMRNibbleArray getNibbleFromCache(final int chunkX, final int chunkY, final int chunkZ) {
+ return this.nibbleCache[chunkX + 5*chunkZ + (5 * 5) * chunkY + this.chunkSectionIndexOffset];
+ }
+
+ protected final SWMRNibbleArray[] getNibblesForChunkFromCache(final int chunkX, final int chunkZ) {
+ final SWMRNibbleArray[] ret = new SWMRNibbleArray[this.maxLightSection - this.minLightSection + 1];
+
+ for (int cy = this.minLightSection; cy <= this.maxLightSection; ++cy) {
+ ret[cy - this.minLightSection] = this.nibbleCache[chunkX + 5*chunkZ + (cy * (5 * 5)) + this.chunkSectionIndexOffset];
+ }
+
+ return ret;
+ }
+
+ protected final void setNibbleInCache(final int chunkX, final int chunkY, final int chunkZ, final SWMRNibbleArray nibble) {
+ this.nibbleCache[chunkX + 5*chunkZ + (5 * 5) * chunkY + this.chunkSectionIndexOffset] = nibble;
+ }
+
+ protected final void setNibblesForChunkInCache(final int chunkX, final int chunkZ, final SWMRNibbleArray[] nibbles) {
+ for (int cy = this.minLightSection; cy <= this.maxLightSection; ++cy) {
+ this.setNibbleInCache(chunkX, cy, chunkZ, nibbles == null ? null : nibbles[cy - this.minLightSection]);
+ }
+ }
+
+ protected final void updateVisible(final LightChunkGetter lightAccess) {
+ for (int index = 0, max = this.nibbleCache.length; index < max; ++index) {
+ final SWMRNibbleArray nibble = this.nibbleCache[index];
+ if (!this.notifyUpdateCache[index] && (nibble == null || !nibble.isDirty())) {
+ continue;
+ }
+
+ final int chunkX = (index % 5) - this.chunkOffsetX;
+ final int chunkZ = ((index / 5) % 5) - this.chunkOffsetZ;
+ final int ySections = (this.maxSection - this.minSection) + 1;
+ final int chunkY = ((index / (5*5)) % (ySections + 2 + 2)) - this.chunkOffsetY;
+ if ((nibble != null && nibble.updateVisible()) || this.notifyUpdateCache[index]) {
+ lightAccess.onLightUpdate(this.skylightPropagator ? LightLayer.SKY : LightLayer.BLOCK, SectionPos.of(chunkX, chunkY, chunkZ));
+ }
+ }
+ }
+
+ protected final void destroyCaches() {
+ Arrays.fill(this.sectionCache, null);
+ Arrays.fill(this.nibbleCache, null);
+ Arrays.fill(this.chunkCache, null);
+ Arrays.fill(this.emptinessMapCache, null);
+ if (this.isClientSide) {
+ Arrays.fill(this.notifyUpdateCache, false);
+ }
+ }
+
+ protected final BlockState getBlockState(final int worldX, final int worldY, final int worldZ) {
+ final LevelChunkSection section = this.sectionCache[(worldX >> 4) + 5 * (worldZ >> 4) + (5 * 5) * (worldY >> 4) + this.chunkSectionIndexOffset];
+
+ if (section != null) {
+ return section.hasOnlyAir() ? AIR_BLOCK_STATE : section.getBlockState(worldX & 15, worldY & 15, worldZ & 15);
+ }
+
+ return AIR_BLOCK_STATE;
+ }
+
+ protected final BlockState getBlockState(final int sectionIndex, final int localIndex) {
+ final LevelChunkSection section = this.sectionCache[sectionIndex];
+
+ if (section != null) {
+ return section.hasOnlyAir() ? AIR_BLOCK_STATE : section.states.get(localIndex);
+ }
+
+ return AIR_BLOCK_STATE;
+ }
+
+ protected final int getLightLevel(final int worldX, final int worldY, final int worldZ) {
+ final SWMRNibbleArray nibble = this.nibbleCache[(worldX >> 4) + 5 * (worldZ >> 4) + (5 * 5) * (worldY >> 4) + this.chunkSectionIndexOffset];
+
+ return nibble == null ? 0 : nibble.getUpdating((worldX & 15) | ((worldZ & 15) << 4) | ((worldY & 15) << 8));
+ }
+
+ protected final int getLightLevel(final int sectionIndex, final int localIndex) {
+ final SWMRNibbleArray nibble = this.nibbleCache[sectionIndex];
+
+ return nibble == null ? 0 : nibble.getUpdating(localIndex);
+ }
+
+ protected final void setLightLevel(final int worldX, final int worldY, final int worldZ, final int level) {
+ final int sectionIndex = (worldX >> 4) + 5 * (worldZ >> 4) + (5 * 5) * (worldY >> 4) + this.chunkSectionIndexOffset;
+ final SWMRNibbleArray nibble = this.nibbleCache[sectionIndex];
+
+ if (nibble != null) {
+ nibble.set((worldX & 15) | ((worldZ & 15) << 4) | ((worldY & 15) << 8), level);
+ if (this.isClientSide) {
+ int cx1 = (worldX - 1) >> 4;
+ int cx2 = (worldX + 1) >> 4;
+ int cy1 = (worldY - 1) >> 4;
+ int cy2 = (worldY + 1) >> 4;
+ int cz1 = (worldZ - 1) >> 4;
+ int cz2 = (worldZ + 1) >> 4;
+ for (int x = cx1; x <= cx2; ++x) {
+ for (int y = cy1; y <= cy2; ++y) {
+ for (int z = cz1; z <= cz2; ++z) {
+ this.notifyUpdateCache[x + 5 * z + (5 * 5) * y + this.chunkSectionIndexOffset] = true;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ protected final void postLightUpdate(final int worldX, final int worldY, final int worldZ) {
+ if (this.isClientSide) {
+ int cx1 = (worldX - 1) >> 4;
+ int cx2 = (worldX + 1) >> 4;
+ int cy1 = (worldY - 1) >> 4;
+ int cy2 = (worldY + 1) >> 4;
+ int cz1 = (worldZ - 1) >> 4;
+ int cz2 = (worldZ + 1) >> 4;
+ for (int x = cx1; x <= cx2; ++x) {
+ for (int y = cy1; y <= cy2; ++y) {
+ for (int z = cz1; z <= cz2; ++z) {
+ this.notifyUpdateCache[x + (5 * z) + (5 * 5 * y) + this.chunkSectionIndexOffset] = true;
+ }
+ }
+ }
+ }
+ }
+
+ protected final void setLightLevel(final int sectionIndex, final int localIndex, final int worldX, final int worldY, final int worldZ, final int level) {
+ final SWMRNibbleArray nibble = this.nibbleCache[sectionIndex];
+
+ if (nibble != null) {
+ nibble.set(localIndex, level);
+ if (this.isClientSide) {
+ int cx1 = (worldX - 1) >> 4;
+ int cx2 = (worldX + 1) >> 4;
+ int cy1 = (worldY - 1) >> 4;
+ int cy2 = (worldY + 1) >> 4;
+ int cz1 = (worldZ - 1) >> 4;
+ int cz2 = (worldZ + 1) >> 4;
+ for (int x = cx1; x <= cx2; ++x) {
+ for (int y = cy1; y <= cy2; ++y) {
+ for (int z = cz1; z <= cz2; ++z) {
+ this.notifyUpdateCache[x + (5 * z) + (5 * 5 * y) + this.chunkSectionIndexOffset] = true;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ protected final boolean[] getEmptinessMap(final int chunkX, final int chunkZ) {
+ return this.emptinessMapCache[chunkX + 5*chunkZ + this.chunkIndexOffset];
+ }
+
+ protected final void setEmptinessMapCache(final int chunkX, final int chunkZ, final boolean[] emptinessMap) {
+ this.emptinessMapCache[chunkX + 5*chunkZ + this.chunkIndexOffset] = emptinessMap;
+ }
+
+ public static SWMRNibbleArray[] getFilledEmptyLight(final LevelHeightAccessor world) {
+ return getFilledEmptyLight(WorldUtil.getTotalLightSections(world));
+ }
+
+ private static SWMRNibbleArray[] getFilledEmptyLight(final int totalLightSections) {
+ final SWMRNibbleArray[] ret = new SWMRNibbleArray[totalLightSections];
+
+ for (int i = 0, len = ret.length; i < len; ++i) {
+ ret[i] = new SWMRNibbleArray(null, true);
+ }
+
+ return ret;
+ }
+
+ protected abstract boolean[] getEmptinessMap(final ChunkAccess chunk);
+
+ protected abstract void setEmptinessMap(final ChunkAccess chunk, final boolean[] to);
+
+ protected abstract SWMRNibbleArray[] getNibblesOnChunk(final ChunkAccess chunk);
+
+ protected abstract void setNibbles(final ChunkAccess chunk, final SWMRNibbleArray[] to);
+
+ protected abstract boolean canUseChunk(final ChunkAccess chunk);
+
+ public final void blocksChangedInChunk(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ,
+ final Set<BlockPos> positions, final Boolean[] changedSections) {
+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true);
+ try {
+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ);
+ if (chunk == null) {
+ return;
+ }
+ if (changedSections != null) {
+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, changedSections, false);
+ if (ret != null) {
+ this.setEmptinessMap(chunk, ret);
+ }
+ }
+ if (!positions.isEmpty()) {
+ this.propagateBlockChanges(lightAccess, chunk, positions);
+ }
+ this.updateVisible(lightAccess);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ // subclasses should not initialise caches, as this will always be done by the super call
+ // subclasses should not invoke updateVisible, as this will always be done by the super call
+ protected abstract void propagateBlockChanges(final LightChunkGetter lightAccess, final ChunkAccess atChunk, final Set<BlockPos> positions);
+
+ protected abstract void checkBlock(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ);
+
+ // if ret > expect, then the real value is at least ret (early returns if ret > expect, rather than calculating actual)
+ // if ret == expect, then expect is the correct light value for pos
+ // if ret < expect, then ret is the real light value
+ protected abstract int calculateLightValue(final LightChunkGetter lightAccess, final int worldX, final int worldY, final int worldZ,
+ final int expect);
+
+ protected final int[] chunkCheckDelayedUpdatesCenter = new int[16 * 16];
+ protected final int[] chunkCheckDelayedUpdatesNeighbour = new int[16 * 16];
+
+ protected void checkChunkEdge(final LightChunkGetter lightAccess, final ChunkAccess chunk,
+ final int chunkX, final int chunkY, final int chunkZ) {
+ final SWMRNibbleArray currNibble = this.getNibbleFromCache(chunkX, chunkY, chunkZ);
+ if (currNibble == null) {
+ return;
+ }
+
+ for (final AxisDirection direction : ONLY_HORIZONTAL_DIRECTIONS) {
+ final int neighbourOffX = direction.x;
+ final int neighbourOffZ = direction.z;
+
+ final SWMRNibbleArray neighbourNibble = this.getNibbleFromCache(chunkX + neighbourOffX,
+ chunkY, chunkZ + neighbourOffZ);
+
+ if (neighbourNibble == null) {
+ continue;
+ }
+
+ if (!currNibble.isInitialisedUpdating() && !neighbourNibble.isInitialisedUpdating()) {
+ // both are zero, nothing to check.
+ continue;
+ }
+
+ // this chunk
+ final int incX;
+ final int incZ;
+ final int startX;
+ final int startZ;
+
+ if (neighbourOffX != 0) {
+ // x direction
+ incX = 0;
+ incZ = 1;
+
+ if (direction.x < 0) {
+ // negative
+ startX = chunkX << 4;
+ } else {
+ startX = chunkX << 4 | 15;
+ }
+ startZ = chunkZ << 4;
+ } else {
+ // z direction
+ incX = 1;
+ incZ = 0;
+
+ if (neighbourOffZ < 0) {
+ // negative
+ startZ = chunkZ << 4;
+ } else {
+ startZ = chunkZ << 4 | 15;
+ }
+ startX = chunkX << 4;
+ }
+
+ int centerDelayedChecks = 0;
+ int neighbourDelayedChecks = 0;
+ for (int currY = chunkY << 4, maxY = currY | 15; currY <= maxY; ++currY) {
+ for (int i = 0, currX = startX, currZ = startZ; i < 16; ++i, currX += incX, currZ += incZ) {
+ final int neighbourX = currX + neighbourOffX;
+ final int neighbourZ = currZ + neighbourOffZ;
+
+ final int currentIndex = (currX & 15) |
+ ((currZ & 15)) << 4 |
+ ((currY & 15) << 8);
+ final int currentLevel = currNibble.getUpdating(currentIndex);
+
+ final int neighbourIndex =
+ (neighbourX & 15) |
+ ((neighbourZ & 15)) << 4 |
+ ((currY & 15) << 8);
+ final int neighbourLevel = neighbourNibble.getUpdating(neighbourIndex);
+
+ // the checks are delayed because the checkBlock method clobbers light values - which then
+ // affect later calculate light value operations. While they don't affect it in a behaviourly significant
+ // way, they do have a negative performance impact due to simply queueing more values
+
+ if (this.calculateLightValue(lightAccess, currX, currY, currZ, currentLevel) != currentLevel) {
+ this.chunkCheckDelayedUpdatesCenter[centerDelayedChecks++] = currentIndex;
+ }
+
+ if (this.calculateLightValue(lightAccess, neighbourX, currY, neighbourZ, neighbourLevel) != neighbourLevel) {
+ this.chunkCheckDelayedUpdatesNeighbour[neighbourDelayedChecks++] = neighbourIndex;
+ }
+ }
+ }
+
+ final int currentChunkOffX = chunkX << 4;
+ final int currentChunkOffZ = chunkZ << 4;
+ final int neighbourChunkOffX = (chunkX + direction.x) << 4;
+ final int neighbourChunkOffZ = (chunkZ + direction.z) << 4;
+ final int chunkOffY = chunkY << 4;
+ for (int i = 0, len = Math.max(centerDelayedChecks, neighbourDelayedChecks); i < len; ++i) {
+ // try to queue neighbouring data together
+ // index = x | (z << 4) | (y << 8)
+ if (i < centerDelayedChecks) {
+ final int value = this.chunkCheckDelayedUpdatesCenter[i];
+ this.checkBlock(lightAccess, currentChunkOffX | (value & 15),
+ chunkOffY | (value >>> 8),
+ currentChunkOffZ | ((value >>> 4) & 0xF));
+ }
+ if (i < neighbourDelayedChecks) {
+ final int value = this.chunkCheckDelayedUpdatesNeighbour[i];
+ this.checkBlock(lightAccess, neighbourChunkOffX | (value & 15),
+ chunkOffY | (value >>> 8),
+ neighbourChunkOffZ | ((value >>> 4) & 0xF));
+ }
+ }
+ }
+ }
+
+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final ShortCollection sections) {
+ final ChunkPos chunkPos = chunk.getPos();
+ final int chunkX = chunkPos.x;
+ final int chunkZ = chunkPos.z;
+
+ for (final ShortIterator iterator = sections.iterator(); iterator.hasNext();) {
+ this.checkChunkEdge(lightAccess, chunk, chunkX, iterator.nextShort(), chunkZ);
+ }
+
+ this.performLightDecrease(lightAccess);
+ }
+
+ // subclasses should not initialise caches, as this will always be done by the super call
+ // subclasses should not invoke updateVisible, as this will always be done by the super call
+ // verifies that light levels on this chunks edges are consistent with this chunk's neighbours
+ // edges. if they are not, they are decreased (effectively performing the logic in checkBlock).
+ // This does not resolve skylight source problems.
+ protected void checkChunkEdges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final int fromSection, final int toSection) {
+ final ChunkPos chunkPos = chunk.getPos();
+ final int chunkX = chunkPos.x;
+ final int chunkZ = chunkPos.z;
+
+ for (int currSectionY = toSection; currSectionY >= fromSection; --currSectionY) {
+ this.checkChunkEdge(lightAccess, chunk, chunkX, currSectionY, chunkZ);
+ }
+
+ this.performLightDecrease(lightAccess);
+ }
+
+ // pulls light from neighbours, and adds them into the increase queue. does not actually propagate.
+ protected final void propagateNeighbourLevels(final LightChunkGetter lightAccess, final ChunkAccess chunk, final int fromSection, final int toSection) {
+ final ChunkPos chunkPos = chunk.getPos();
+ final int chunkX = chunkPos.x;
+ final int chunkZ = chunkPos.z;
+
+ for (int currSectionY = toSection; currSectionY >= fromSection; --currSectionY) {
+ final SWMRNibbleArray currNibble = this.getNibbleFromCache(chunkX, currSectionY, chunkZ);
+ if (currNibble == null) {
+ continue;
+ }
+ for (final AxisDirection direction : ONLY_HORIZONTAL_DIRECTIONS) {
+ final int neighbourOffX = direction.x;
+ final int neighbourOffZ = direction.z;
+
+ final SWMRNibbleArray neighbourNibble = this.getNibbleFromCache(chunkX + neighbourOffX,
+ currSectionY, chunkZ + neighbourOffZ);
+
+ if (neighbourNibble == null || !neighbourNibble.isInitialisedUpdating()) {
+ // can't pull from 0
+ continue;
+ }
+
+ // neighbour chunk
+ final int incX;
+ final int incZ;
+ final int startX;
+ final int startZ;
+
+ if (neighbourOffX != 0) {
+ // x direction
+ incX = 0;
+ incZ = 1;
+
+ if (direction.x < 0) {
+ // negative
+ startX = (chunkX << 4) - 1;
+ } else {
+ startX = (chunkX << 4) + 16;
+ }
+ startZ = chunkZ << 4;
+ } else {
+ // z direction
+ incX = 1;
+ incZ = 0;
+
+ if (neighbourOffZ < 0) {
+ // negative
+ startZ = (chunkZ << 4) - 1;
+ } else {
+ startZ = (chunkZ << 4) + 16;
+ }
+ startX = chunkX << 4;
+ }
+
+ final long propagateDirection = 1L << direction.getOpposite().ordinal(); // we only want to check in this direction towards this chunk
+ final int encodeOffset = this.coordinateOffset;
+
+ for (int currY = currSectionY << 4, maxY = currY | 15; currY <= maxY; ++currY) {
+ for (int i = 0, currX = startX, currZ = startZ; i < 16; ++i, currX += incX, currZ += incZ) {
+ final int level = neighbourNibble.getUpdating(
+ (currX & 15)
+ | ((currZ & 15) << 4)
+ | ((currY & 15) << 8)
+ );
+
+ if (level <= 1) {
+ // nothing to propagate
+ continue;
+ }
+
+ this.appendToIncreaseQueue(
+ ((currX + (currZ << 6) + (currY << (6 + 6)) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((level & 0xFL) << (6 + 6 + 16))
+ | (propagateDirection << (6 + 6 + 16 + 4))
+ | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS // don't know if the current block is transparent, must check.
+ );
+ }
+ }
+ }
+ }
+ }
+
+ public static Boolean[] getEmptySectionsForChunk(final ChunkAccess chunk) {
+ final LevelChunkSection[] sections = chunk.getSections();
+ final Boolean[] ret = new Boolean[sections.length];
+
+ for (int i = 0; i < sections.length; ++i) {
+ if (sections[i] == null || sections[i].hasOnlyAir()) {
+ ret[i] = Boolean.TRUE;
+ } else {
+ ret[i] = Boolean.FALSE;
+ }
+ }
+
+ return ret;
+ }
+
+ public final void forceHandleEmptySectionChanges(final LightChunkGetter lightAccess, final ChunkAccess chunk, final Boolean[] emptinessChanges) {
+ final int chunkX = chunk.getPos().x;
+ final int chunkZ = chunk.getPos().z;
+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true);
+ try {
+ // force current chunk into cache
+ this.setChunkInCache(chunkX, chunkZ, chunk);
+ this.setBlocksForChunkInCache(chunkX, chunkZ, chunk.getSections());
+ this.setNibblesForChunkInCache(chunkX, chunkZ, this.getNibblesOnChunk(chunk));
+ this.setEmptinessMapCache(chunkX, chunkZ, this.getEmptinessMap(chunk));
+
+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, emptinessChanges, false);
+ if (ret != null) {
+ this.setEmptinessMap(chunk, ret);
+ }
+ this.updateVisible(lightAccess);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ public final void handleEmptySectionChanges(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ,
+ final Boolean[] emptinessChanges) {
+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true);
+ try {
+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ);
+ if (chunk == null) {
+ return;
+ }
+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, emptinessChanges, false);
+ if (ret != null) {
+ this.setEmptinessMap(chunk, ret);
+ }
+ this.updateVisible(lightAccess);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ protected abstract void initNibble(final int chunkX, final int chunkY, final int chunkZ, final boolean extrude, final boolean initRemovedNibbles);
+
+ protected abstract void setNibbleNull(final int chunkX, final int chunkY, final int chunkZ);
+
+ // subclasses should not initialise caches, as this will always be done by the super call
+ // subclasses should not invoke updateVisible, as this will always be done by the super call
+ // subclasses are guaranteed that this is always called before a changed block set
+ // newChunk specifies whether the changes describe a "first load" of a chunk or changes to existing, already loaded chunks
+ // rets non-null when the emptiness map changed and needs to be updated
+ protected final boolean[] handleEmptySectionChanges(final LightChunkGetter lightAccess, final ChunkAccess chunk,
+ final Boolean[] emptinessChanges, final boolean unlit) {
+ final Level world = (Level)lightAccess.getLevel();
+ final int chunkX = chunk.getPos().x;
+ final int chunkZ = chunk.getPos().z;
+
+ boolean[] chunkEmptinessMap = this.getEmptinessMap(chunkX, chunkZ);
+ boolean[] ret = null;
+ final boolean needsInit = unlit || chunkEmptinessMap == null;
+ if (needsInit) {
+ this.setEmptinessMapCache(chunkX, chunkZ, ret = chunkEmptinessMap = new boolean[WorldUtil.getTotalSections(world)]);
+ }
+
+ // update emptiness map
+ for (int sectionIndex = (emptinessChanges.length - 1); sectionIndex >= 0; --sectionIndex) {
+ Boolean valueBoxed = emptinessChanges[sectionIndex];
+ if (valueBoxed == null) {
+ if (!needsInit) {
+ continue;
+ }
+ final LevelChunkSection section = this.getChunkSection(chunkX, sectionIndex + this.minSection, chunkZ);
+ emptinessChanges[sectionIndex] = valueBoxed = section == null || section.hasOnlyAir() ? Boolean.TRUE : Boolean.FALSE;
+ }
+ chunkEmptinessMap[sectionIndex] = valueBoxed.booleanValue();
+ }
+
+ // now init neighbour nibbles
+ for (int sectionIndex = (emptinessChanges.length - 1); sectionIndex >= 0; --sectionIndex) {
+ final Boolean valueBoxed = emptinessChanges[sectionIndex];
+ final int sectionY = sectionIndex + this.minSection;
+ if (valueBoxed == null) {
+ continue;
+ }
+
+ final boolean empty = valueBoxed.booleanValue();
+
+ if (empty) {
+ continue;
+ }
+
+ for (int dz = -1; dz <= 1; ++dz) {
+ for (int dx = -1; dx <= 1; ++dx) {
+ // if we're not empty, we also need to initialise nibbles
+ // note: if we're unlit, we absolutely do not want to extrude, as light data isn't set up
+ final boolean extrude = (dx | dz) != 0 || !unlit;
+ for (int dy = 1; dy >= -1; --dy) {
+ this.initNibble(dx + chunkX, dy + sectionY, dz + chunkZ, extrude, false);
+ }
+ }
+ }
+ }
+
+ // check for de-init and lazy-init
+ // lazy init is when chunks are being lit, so at the time they weren't loaded when their neighbours were running
+ // init checks.
+ for (int dz = -1; dz <= 1; ++dz) {
+ for (int dx = -1; dx <= 1; ++dx) {
+ // does this neighbour have 1 radius loaded?
+ boolean neighboursLoaded = true;
+ neighbour_loaded_search:
+ for (int dz2 = -1; dz2 <= 1; ++dz2) {
+ for (int dx2 = -1; dx2 <= 1; ++dx2) {
+ if (this.getEmptinessMap(dx + dx2 + chunkX, dz + dz2 + chunkZ) == null) {
+ neighboursLoaded = false;
+ break neighbour_loaded_search;
+ }
+ }
+ }
+
+ for (int sectionY = this.maxLightSection; sectionY >= this.minLightSection; --sectionY) {
+ // check neighbours to see if we need to de-init this one
+ boolean allEmpty = true;
+ neighbour_search:
+ for (int dy2 = -1; dy2 <= 1; ++dy2) {
+ for (int dz2 = -1; dz2 <= 1; ++dz2) {
+ for (int dx2 = -1; dx2 <= 1; ++dx2) {
+ final int y = sectionY + dy2;
+ if (y < this.minSection || y > this.maxSection) {
+ // empty
+ continue;
+ }
+ final boolean[] emptinessMap = this.getEmptinessMap(dx + dx2 + chunkX, dz + dz2 + chunkZ);
+ if (emptinessMap != null) {
+ if (!emptinessMap[y - this.minSection]) {
+ allEmpty = false;
+ break neighbour_search;
+ }
+ } else {
+ final LevelChunkSection section = this.getChunkSection(dx + dx2 + chunkX, y, dz + dz2 + chunkZ);
+ if (section != null && !section.hasOnlyAir()) {
+ allEmpty = false;
+ break neighbour_search;
+ }
+ }
+ }
+ }
+ }
+
+ if (allEmpty & neighboursLoaded) {
+ // can only de-init when neighbours are loaded
+ // de-init is fine to delay, as de-init is just an optimisation - it's not required for lighting
+ // to be correct
+
+ // all were empty, so de-init
+ this.setNibbleNull(dx + chunkX, sectionY, dz + chunkZ);
+ } else if (!allEmpty) {
+ // must init
+ final boolean extrude = (dx | dz) != 0 || !unlit;
+ this.initNibble(dx + chunkX, sectionY, dz + chunkZ, extrude, false);
+ }
+ }
+ }
+ }
+
+ return ret;
+ }
+
+ public final void checkChunkEdges(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ) {
+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, false);
+ try {
+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ);
+ if (chunk == null) {
+ return;
+ }
+ this.checkChunkEdges(lightAccess, chunk, this.minLightSection, this.maxLightSection);
+ this.updateVisible(lightAccess);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ public final void checkChunkEdges(final LightChunkGetter lightAccess, final int chunkX, final int chunkZ, final ShortCollection sections) {
+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, false);
+ try {
+ final ChunkAccess chunk = this.getChunkInCache(chunkX, chunkZ);
+ if (chunk == null) {
+ return;
+ }
+ this.checkChunkEdges(lightAccess, chunk, sections);
+ this.updateVisible(lightAccess);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ // subclasses should not initialise caches, as this will always be done by the super call
+ // subclasses should not invoke updateVisible, as this will always be done by the super call
+ // needsEdgeChecks applies when possibly loading vanilla data, which means we need to validate the current
+ // chunks light values with respect to neighbours
+ // subclasses should note that the emptiness changes are propagated BEFORE this is called, so this function
+ // does not need to detect empty chunks itself (and it should do no handling for them either!)
+ protected abstract void lightChunk(final LightChunkGetter lightAccess, final ChunkAccess chunk, final boolean needsEdgeChecks);
+
+ public final void light(final LightChunkGetter lightAccess, final ChunkAccess chunk, final Boolean[] emptySections) {
+ final int chunkX = chunk.getPos().x;
+ final int chunkZ = chunk.getPos().z;
+ this.setupCaches(lightAccess, chunkX * 16 + 7, 128, chunkZ * 16 + 7, true, true);
+
+ try {
+ final SWMRNibbleArray[] nibbles = getFilledEmptyLight(this.maxLightSection - this.minLightSection + 1);
+ // force current chunk into cache
+ this.setChunkInCache(chunkX, chunkZ, chunk);
+ this.setBlocksForChunkInCache(chunkX, chunkZ, chunk.getSections());
+ this.setNibblesForChunkInCache(chunkX, chunkZ, nibbles);
+ this.setEmptinessMapCache(chunkX, chunkZ, this.getEmptinessMap(chunk));
+
+ final boolean[] ret = this.handleEmptySectionChanges(lightAccess, chunk, emptySections, true);
+ if (ret != null) {
+ this.setEmptinessMap(chunk, ret);
+ }
+ this.lightChunk(lightAccess, chunk, true);
+ this.setNibbles(chunk, nibbles);
+ this.updateVisible(lightAccess);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ public final void relightChunks(final LightChunkGetter lightAccess, final Set<ChunkPos> chunks,
+ final Consumer<ChunkPos> chunkLightCallback, final IntConsumer onComplete) {
+ // it's recommended for maximum performance that the set is ordered according to a BFS from the center of
+ // the region of chunks to relight
+ // it's required that tickets are added for each chunk to keep them loaded
+ final Long2ObjectOpenHashMap<SWMRNibbleArray[]> nibblesByChunk = new Long2ObjectOpenHashMap<>();
+ final Long2ObjectOpenHashMap<boolean[]> emptinessMapByChunk = new Long2ObjectOpenHashMap<>();
+
+ final int[] neighbourLightOrder = new int[] {
+ // d = 0
+ 0, 0,
+ // d = 1
+ -1, 0,
+ 0, -1,
+ 1, 0,
+ 0, 1,
+ // d = 2
+ -1, 1,
+ 1, 1,
+ -1, -1,
+ 1, -1,
+ };
+
+ int lightCalls = 0;
+
+ for (final ChunkPos chunkPos : chunks) {
+ final int chunkX = chunkPos.x;
+ final int chunkZ = chunkPos.z;
+ final ChunkAccess chunk = (ChunkAccess)lightAccess.getChunkForLighting(chunkX, chunkZ);
+ if (chunk == null || !this.canUseChunk(chunk)) {
+ throw new IllegalStateException();
+ }
+
+ for (int i = 0, len = neighbourLightOrder.length; i < len; i += 2) {
+ final int dx = neighbourLightOrder[i];
+ final int dz = neighbourLightOrder[i + 1];
+ final int neighbourX = dx + chunkX;
+ final int neighbourZ = dz + chunkZ;
+
+ final ChunkAccess neighbour = (ChunkAccess)lightAccess.getChunkForLighting(neighbourX, neighbourZ);
+ if (neighbour == null || !this.canUseChunk(neighbour)) {
+ continue;
+ }
+
+ if (nibblesByChunk.get(CoordinateUtils.getChunkKey(neighbourX, neighbourZ)) != null) {
+ // lit already called for neighbour, no need to light it now
+ continue;
+ }
+
+ // light neighbour chunk
+ this.setupEncodeOffset(neighbourX * 16 + 7, 128, neighbourZ * 16 + 7);
+ try {
+ // insert all neighbouring chunks for this neighbour that we have data for
+ for (int dz2 = -1; dz2 <= 1; ++dz2) {
+ for (int dx2 = -1; dx2 <= 1; ++dx2) {
+ final int neighbourX2 = neighbourX + dx2;
+ final int neighbourZ2 = neighbourZ + dz2;
+ final long key = CoordinateUtils.getChunkKey(neighbourX2, neighbourZ2);
+ final ChunkAccess neighbour2 = (ChunkAccess)lightAccess.getChunkForLighting(neighbourX2, neighbourZ2);
+ if (neighbour2 == null || !this.canUseChunk(neighbour2)) {
+ continue;
+ }
+
+ final SWMRNibbleArray[] nibbles = nibblesByChunk.get(key);
+ if (nibbles == null) {
+ // we haven't lit this chunk
+ continue;
+ }
+
+ this.setChunkInCache(neighbourX2, neighbourZ2, neighbour2);
+ this.setBlocksForChunkInCache(neighbourX2, neighbourZ2, neighbour2.getSections());
+ this.setNibblesForChunkInCache(neighbourX2, neighbourZ2, nibbles);
+ this.setEmptinessMapCache(neighbourX2, neighbourZ2, emptinessMapByChunk.get(key));
+ }
+ }
+
+ final long key = CoordinateUtils.getChunkKey(neighbourX, neighbourZ);
+
+ // now insert the neighbour chunk and light it
+ final SWMRNibbleArray[] nibbles = getFilledEmptyLight(this.world);
+ nibblesByChunk.put(key, nibbles);
+
+ this.setChunkInCache(neighbourX, neighbourZ, neighbour);
+ this.setBlocksForChunkInCache(neighbourX, neighbourZ, neighbour.getSections());
+ this.setNibblesForChunkInCache(neighbourX, neighbourZ, nibbles);
+
+ final boolean[] neighbourEmptiness = this.handleEmptySectionChanges(lightAccess, neighbour, getEmptySectionsForChunk(neighbour), true);
+ emptinessMapByChunk.put(key, neighbourEmptiness);
+ if (chunks.contains(new ChunkPos(neighbourX, neighbourZ))) {
+ this.setEmptinessMap(neighbour, neighbourEmptiness);
+ }
+
+ this.lightChunk(lightAccess, neighbour, false);
+ } finally {
+ this.destroyCaches();
+ }
+ }
+
+ // done lighting all neighbours, so the chunk is now fully lit
+
+ // make sure nibbles are fully updated before calling back
+ final SWMRNibbleArray[] nibbles = nibblesByChunk.get(CoordinateUtils.getChunkKey(chunkX, chunkZ));
+ for (final SWMRNibbleArray nibble : nibbles) {
+ nibble.updateVisible();
+ }
+
+ this.setNibbles(chunk, nibbles);
+
+ for (int y = this.minLightSection; y <= this.maxLightSection; ++y) {
+ lightAccess.onLightUpdate(this.skylightPropagator ? LightLayer.SKY : LightLayer.BLOCK, SectionPos.of(chunkX, y, chunkX));
+ }
+
+ // now do callback
+ if (chunkLightCallback != null) {
+ chunkLightCallback.accept(chunkPos);
+ }
+ ++lightCalls;
+ }
+
+ if (onComplete != null) {
+ onComplete.accept(lightCalls);
+ }
+ }
+
+ // contains:
+ // lower (6 + 6 + 16) = 28 bits: encoded coordinate position (x | (z << 6) | (y << (6 + 6))))
+ // next 4 bits: propagated light level (0, 15]
+ // next 6 bits: propagation direction bitset
+ // next 24 bits: unused
+ // last 3 bits: state flags
+ // state flags:
+ // whether the increase propagator needs to write the propagated level to the position, used to avoid cascading light
+ // updates for block sources
+ protected static final long FLAG_WRITE_LEVEL = Long.MIN_VALUE >>> 2;
+ // whether the propagation needs to check if its current level is equal to the expected level
+ // used only in increase propagation
+ protected static final long FLAG_RECHECK_LEVEL = Long.MIN_VALUE >>> 1;
+ // whether the propagation needs to consider if its block is conditionally transparent
+ protected static final long FLAG_HAS_SIDED_TRANSPARENT_BLOCKS = Long.MIN_VALUE;
+
+ protected long[] increaseQueue = new long[16 * 16 * 16];
+ protected int increaseQueueInitialLength;
+ protected long[] decreaseQueue = new long[16 * 16 * 16];
+ protected int decreaseQueueInitialLength;
+
+ protected final long[] resizeIncreaseQueue() {
+ return this.increaseQueue = Arrays.copyOf(this.increaseQueue, this.increaseQueue.length * 2);
+ }
+
+ protected final long[] resizeDecreaseQueue() {
+ return this.decreaseQueue = Arrays.copyOf(this.decreaseQueue, this.decreaseQueue.length * 2);
+ }
+
+ protected final void appendToIncreaseQueue(final long value) {
+ final int idx = this.increaseQueueInitialLength++;
+ long[] queue = this.increaseQueue;
+ if (idx >= queue.length) {
+ queue = this.resizeIncreaseQueue();
+ queue[idx] = value;
+ } else {
+ queue[idx] = value;
+ }
+ }
+
+ protected final void appendToDecreaseQueue(final long value) {
+ final int idx = this.decreaseQueueInitialLength++;
+ long[] queue = this.decreaseQueue;
+ if (idx >= queue.length) {
+ queue = this.resizeDecreaseQueue();
+ queue[idx] = value;
+ } else {
+ queue[idx] = value;
+ }
+ }
+
+ protected static final AxisDirection[][] OLD_CHECK_DIRECTIONS = new AxisDirection[1 << 6][];
+ protected static final int ALL_DIRECTIONS_BITSET = (1 << 6) - 1;
+ static {
+ for (int i = 0; i < OLD_CHECK_DIRECTIONS.length; ++i) {
+ final List<AxisDirection> directions = new ArrayList<>();
+ for (int bitset = i, len = Integer.bitCount(i), index = 0; index < len; ++index, bitset ^= IntegerUtil.getTrailingBit(bitset)) {
+ directions.add(AXIS_DIRECTIONS[IntegerUtil.trailingZeros(bitset)]);
+ }
+ OLD_CHECK_DIRECTIONS[i] = directions.toArray(new AxisDirection[0]);
+ }
+ }
+
+ protected final void performLightIncrease(final LightChunkGetter lightAccess) {
+ final BlockGetter world = lightAccess.getLevel();
+ long[] queue = this.increaseQueue;
+ int queueReadIndex = 0;
+ int queueLength = this.increaseQueueInitialLength;
+ this.increaseQueueInitialLength = 0;
+ final int decodeOffsetX = -this.encodeOffsetX;
+ final int decodeOffsetY = -this.encodeOffsetY;
+ final int decodeOffsetZ = -this.encodeOffsetZ;
+ final int encodeOffset = this.coordinateOffset;
+ final int sectionOffset = this.chunkSectionIndexOffset;
+
+ while (queueReadIndex < queueLength) {
+ final long queueValue = queue[queueReadIndex++];
+
+ final int posX = ((int)queueValue & 63) + decodeOffsetX;
+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ;
+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY;
+ final int propagatedLightLevel = (int)((queueValue >>> (6 + 6 + 16)) & 0xFL);
+ final AxisDirection[] checkDirections = OLD_CHECK_DIRECTIONS[(int)((queueValue >>> (6 + 6 + 16 + 4)) & 63L)];
+
+ if ((queueValue & FLAG_RECHECK_LEVEL) != 0L) {
+ if (this.getLightLevel(posX, posY, posZ) != propagatedLightLevel) {
+ // not at the level we expect, so something changed.
+ continue;
+ }
+ } else if ((queueValue & FLAG_WRITE_LEVEL) != 0L) {
+ // these are used to restore block sources after a propagation decrease
+ this.setLightLevel(posX, posY, posZ, propagatedLightLevel);
+ }
+
+ if ((queueValue & FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) == 0L) {
+ // we don't need to worry about our state here.
+ for (final AxisDirection propagate : checkDirections) {
+ final int offX = posX + propagate.x;
+ final int offY = posY + propagate.y;
+ final int offZ = posZ + propagate.z;
+
+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset;
+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8);
+
+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex];
+ final int currentLevel;
+ if (currentNibble == null || (currentLevel = currentNibble.getUpdating(localIndex)) >= (propagatedLightLevel - 1)) {
+ continue; // already at the level we want or unloaded
+ }
+
+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex);
+ if (blockState == null) {
+ continue;
+ }
+ final int opacityCached = blockState.getOpacityIfCached();
+ if (opacityCached != -1) {
+ final int targetLevel = propagatedLightLevel - Math.max(1, opacityCached);
+ if (targetLevel > currentLevel) {
+ currentNibble.set(localIndex, targetLevel);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 1) {
+ if (queueLength >= queue.length) {
+ queue = this.resizeIncreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4));
+ continue;
+ }
+ }
+ continue;
+ } else {
+ this.mutablePos1.set(offX, offY, offZ);
+ long flags = 0;
+ if (blockState.isConditionallyFullOpaque()) {
+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms);
+
+ if (Shapes.faceShapeOccludes(Shapes.empty(), cullingFace)) {
+ continue;
+ }
+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS;
+ }
+
+ final int opacity = blockState.getLightBlock(world, this.mutablePos1);
+ final int targetLevel = propagatedLightLevel - Math.max(1, opacity);
+ if (targetLevel <= currentLevel) {
+ continue;
+ }
+
+ currentNibble.set(localIndex, targetLevel);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 1) {
+ if (queueLength >= queue.length) {
+ queue = this.resizeIncreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4))
+ | (flags);
+ }
+ continue;
+ }
+ }
+ } else {
+ // we actually need to worry about our state here
+ final BlockState fromBlock = this.getBlockState(posX, posY, posZ);
+ this.mutablePos2.set(posX, posY, posZ);
+ for (final AxisDirection propagate : checkDirections) {
+ final int offX = posX + propagate.x;
+ final int offY = posY + propagate.y;
+ final int offZ = posZ + propagate.z;
+
+ final VoxelShape fromShape = fromBlock.isConditionallyFullOpaque() ? fromBlock.getFaceOcclusionShape(world, this.mutablePos2, propagate.nms) : Shapes.empty();
+
+ if (fromShape != Shapes.empty() && Shapes.faceShapeOccludes(Shapes.empty(), fromShape)) {
+ continue;
+ }
+
+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset;
+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8);
+
+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex];
+ final int currentLevel;
+
+ if (currentNibble == null || (currentLevel = currentNibble.getUpdating(localIndex)) >= (propagatedLightLevel - 1)) {
+ continue; // already at the level we want
+ }
+
+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex);
+ if (blockState == null) {
+ continue;
+ }
+ final int opacityCached = blockState.getOpacityIfCached();
+ if (opacityCached != -1) {
+ final int targetLevel = propagatedLightLevel - Math.max(1, opacityCached);
+ if (targetLevel > currentLevel) {
+ currentNibble.set(localIndex, targetLevel);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 1) {
+ if (queueLength >= queue.length) {
+ queue = this.resizeIncreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4));
+ continue;
+ }
+ }
+ continue;
+ } else {
+ this.mutablePos1.set(offX, offY, offZ);
+ long flags = 0;
+ if (blockState.isConditionallyFullOpaque()) {
+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms);
+
+ if (Shapes.faceShapeOccludes(fromShape, cullingFace)) {
+ continue;
+ }
+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS;
+ }
+
+ final int opacity = blockState.getLightBlock(world, this.mutablePos1);
+ final int targetLevel = propagatedLightLevel - Math.max(1, opacity);
+ if (targetLevel <= currentLevel) {
+ continue;
+ }
+
+ currentNibble.set(localIndex, targetLevel);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 1) {
+ if (queueLength >= queue.length) {
+ queue = this.resizeIncreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | (propagate.everythingButTheOppositeDirection << (6 + 6 + 16 + 4))
+ | (flags);
+ }
+ continue;
+ }
+ }
+ }
+ }
+ }
+
+ protected final void performLightDecrease(final LightChunkGetter lightAccess) {
+ final BlockGetter world = lightAccess.getLevel();
+ long[] queue = this.decreaseQueue;
+ long[] increaseQueue = this.increaseQueue;
+ int queueReadIndex = 0;
+ int queueLength = this.decreaseQueueInitialLength;
+ this.decreaseQueueInitialLength = 0;
+ int increaseQueueLength = this.increaseQueueInitialLength;
+ final int decodeOffsetX = -this.encodeOffsetX;
+ final int decodeOffsetY = -this.encodeOffsetY;
+ final int decodeOffsetZ = -this.encodeOffsetZ;
+ final int encodeOffset = this.coordinateOffset;
+ final int sectionOffset = this.chunkSectionIndexOffset;
+ final int emittedMask = this.emittedLightMask;
+
+ while (queueReadIndex < queueLength) {
+ final long queueValue = queue[queueReadIndex++];
+
+ final int posX = ((int)queueValue & 63) + decodeOffsetX;
+ final int posZ = (((int)queueValue >>> 6) & 63) + decodeOffsetZ;
+ final int posY = (((int)queueValue >>> 12) & ((1 << 16) - 1)) + decodeOffsetY;
+ final int propagatedLightLevel = (int)((queueValue >>> (6 + 6 + 16)) & 0xF);
+ final AxisDirection[] checkDirections = OLD_CHECK_DIRECTIONS[(int)((queueValue >>> (6 + 6 + 16 + 4)) & 63)];
+
+ if ((queueValue & FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) == 0L) {
+ // we don't need to worry about our state here.
+ for (final AxisDirection propagate : checkDirections) {
+ final int offX = posX + propagate.x;
+ final int offY = posY + propagate.y;
+ final int offZ = posZ + propagate.z;
+
+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset;
+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8);
+
+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex];
+ final int lightLevel;
+
+ if (currentNibble == null || (lightLevel = currentNibble.getUpdating(localIndex)) == 0) {
+ // already at lowest (or unloaded), nothing we can do
+ continue;
+ }
+
+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex);
+ if (blockState == null) {
+ continue;
+ }
+ final int opacityCached = blockState.getOpacityIfCached();
+ if (opacityCached != -1) {
+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacityCached));
+ if (lightLevel > targetLevel) {
+ // it looks like another source propagated here, so re-propagate it
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((lightLevel & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | FLAG_RECHECK_LEVEL;
+ continue;
+ }
+ final int emittedLight = blockState.getLightEmission() & emittedMask;
+ if (emittedLight != 0) {
+ // re-propagate source
+ // note: do not set recheck level, or else the propagation will fail
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((emittedLight & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (blockState.isConditionallyFullOpaque() ? (FLAG_WRITE_LEVEL | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) : FLAG_WRITE_LEVEL);
+ }
+
+ currentNibble.set(localIndex, 0);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 0) { // we actually need to propagate 0 just in case we find a neighbour...
+ if (queueLength >= queue.length) {
+ queue = this.resizeDecreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4));
+ continue;
+ }
+ continue;
+ } else {
+ this.mutablePos1.set(offX, offY, offZ);
+ long flags = 0;
+ if (blockState.isConditionallyFullOpaque()) {
+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms);
+
+ if (Shapes.faceShapeOccludes(Shapes.empty(), cullingFace)) {
+ continue;
+ }
+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS;
+ }
+
+ final int opacity = blockState.getLightBlock(world, this.mutablePos1);
+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacity));
+ if (lightLevel > targetLevel) {
+ // it looks like another source propagated here, so re-propagate it
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((lightLevel & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (FLAG_RECHECK_LEVEL | flags);
+ continue;
+ }
+ final int emittedLight = blockState.getLightEmission() & emittedMask;
+ if (emittedLight != 0) {
+ // re-propagate source
+ // note: do not set recheck level, or else the propagation will fail
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((emittedLight & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (flags | FLAG_WRITE_LEVEL);
+ }
+
+ currentNibble.set(localIndex, 0);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 0) {
+ if (queueLength >= queue.length) {
+ queue = this.resizeDecreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4))
+ | flags;
+ }
+ continue;
+ }
+ }
+ } else {
+ // we actually need to worry about our state here
+ final BlockState fromBlock = this.getBlockState(posX, posY, posZ);
+ this.mutablePos2.set(posX, posY, posZ);
+ for (final AxisDirection propagate : checkDirections) {
+ final int offX = posX + propagate.x;
+ final int offY = posY + propagate.y;
+ final int offZ = posZ + propagate.z;
+
+ final int sectionIndex = (offX >> 4) + 5 * (offZ >> 4) + (5 * 5) * (offY >> 4) + sectionOffset;
+ final int localIndex = (offX & 15) | ((offZ & 15) << 4) | ((offY & 15) << 8);
+
+ final VoxelShape fromShape = (fromBlock.isConditionallyFullOpaque()) ? fromBlock.getFaceOcclusionShape(world, this.mutablePos2, propagate.nms) : Shapes.empty();
+
+ if (fromShape != Shapes.empty() && Shapes.faceShapeOccludes(Shapes.empty(), fromShape)) {
+ continue;
+ }
+
+ final SWMRNibbleArray currentNibble = this.nibbleCache[sectionIndex];
+ final int lightLevel;
+
+ if (currentNibble == null || (lightLevel = currentNibble.getUpdating(localIndex)) == 0) {
+ // already at lowest (or unloaded), nothing we can do
+ continue;
+ }
+
+ final BlockState blockState = this.getBlockState(sectionIndex, localIndex);
+ if (blockState == null) {
+ continue;
+ }
+ final int opacityCached = blockState.getOpacityIfCached();
+ if (opacityCached != -1) {
+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacityCached));
+ if (lightLevel > targetLevel) {
+ // it looks like another source propagated here, so re-propagate it
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((lightLevel & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | FLAG_RECHECK_LEVEL;
+ continue;
+ }
+ final int emittedLight = blockState.getLightEmission() & emittedMask;
+ if (emittedLight != 0) {
+ // re-propagate source
+ // note: do not set recheck level, or else the propagation will fail
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((emittedLight & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (blockState.isConditionallyFullOpaque() ? (FLAG_WRITE_LEVEL | FLAG_HAS_SIDED_TRANSPARENT_BLOCKS) : FLAG_WRITE_LEVEL);
+ }
+
+ currentNibble.set(localIndex, 0);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 0) { // we actually need to propagate 0 just in case we find a neighbour...
+ if (queueLength >= queue.length) {
+ queue = this.resizeDecreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4));
+ continue;
+ }
+ continue;
+ } else {
+ this.mutablePos1.set(offX, offY, offZ);
+ long flags = 0;
+ if (blockState.isConditionallyFullOpaque()) {
+ final VoxelShape cullingFace = blockState.getFaceOcclusionShape(world, this.mutablePos1, propagate.getOpposite().nms);
+
+ if (Shapes.faceShapeOccludes(fromShape, cullingFace)) {
+ continue;
+ }
+ flags |= FLAG_HAS_SIDED_TRANSPARENT_BLOCKS;
+ }
+
+ final int opacity = blockState.getLightBlock(world, this.mutablePos1);
+ final int targetLevel = Math.max(0, propagatedLightLevel - Math.max(1, opacity));
+ if (lightLevel > targetLevel) {
+ // it looks like another source propagated here, so re-propagate it
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((lightLevel & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (FLAG_RECHECK_LEVEL | flags);
+ continue;
+ }
+ final int emittedLight = blockState.getLightEmission() & emittedMask;
+ if (emittedLight != 0) {
+ // re-propagate source
+ // note: do not set recheck level, or else the propagation will fail
+ if (increaseQueueLength >= increaseQueue.length) {
+ increaseQueue = this.resizeIncreaseQueue();
+ }
+ increaseQueue[increaseQueueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((emittedLight & 0xFL) << (6 + 6 + 16))
+ | (((long)ALL_DIRECTIONS_BITSET) << (6 + 6 + 16 + 4))
+ | (flags | FLAG_WRITE_LEVEL);
+ }
+
+ currentNibble.set(localIndex, 0);
+ this.postLightUpdate(offX, offY, offZ);
+
+ if (targetLevel > 0) { // we actually need to propagate 0 just in case we find a neighbour...
+ if (queueLength >= queue.length) {
+ queue = this.resizeDecreaseQueue();
+ }
+ queue[queueLength++] =
+ ((offX + (offZ << 6) + (offY << 12) + encodeOffset) & ((1L << (6 + 6 + 16)) - 1))
+ | ((targetLevel & 0xFL) << (6 + 6 + 16))
+ | ((propagate.everythingButTheOppositeDirection) << (6 + 6 + 16 + 4))
+ | flags;
+ }
+ continue;
+ }
+ }
+ }
+ }
+
+ // propagate sources we clobbered
+ this.increaseQueueInitialLength = increaseQueueLength;
+ this.performLightIncrease(lightAccess);
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
new file mode 100644
index 0000000000000000000000000000000000000000..9a5fa60cb8156fe254a123e237d957ccb82f7195
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java
@@ -0,0 +1,665 @@
+package ca.spottedleaf.starlight.common.light;
+
+import ca.spottedleaf.starlight.common.util.CoordinateUtils;
+import ca.spottedleaf.starlight.common.util.WorldUtil;
+import it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap;
+import it.unimi.dsi.fastutil.shorts.ShortCollection;
+import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet;
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.SectionPos;
+import net.minecraft.server.level.ServerChunkCache;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.TicketType;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.DataLayer;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraft.world.level.chunk.LightChunkGetter;
+import net.minecraft.world.level.lighting.LayerLightEventListener;
+import net.minecraft.world.level.lighting.LevelLightEngine;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+import java.util.function.IntConsumer;
+
+public final class StarLightInterface {
+
+ public static final TicketType<ChunkPos> CHUNK_WORK_TICKET = TicketType.create("starlight_chunk_work_ticket", (p1, p2) -> Long.compare(p1.toLong(), p2.toLong()));
+
+ /**
+ * Can be {@code null}, indicating the light is all empty.
+ */
+ protected final Level world;
+ protected final LightChunkGetter lightAccess;
+
+ protected final ArrayDeque<SkyStarLightEngine> cachedSkyPropagators;
+ protected final ArrayDeque<BlockStarLightEngine> cachedBlockPropagators;
+
+ protected final LightQueue lightQueue = new LightQueue(this);
+
+ protected final LayerLightEventListener skyReader;
+ protected final LayerLightEventListener blockReader;
+ protected final boolean isClientSide;
+
+ protected final int minSection;
+ protected final int maxSection;
+ protected final int minLightSection;
+ protected final int maxLightSection;
+
+ public final LevelLightEngine lightEngine;
+
+ private final boolean hasBlockLight;
+ private final boolean hasSkyLight;
+
+ public StarLightInterface(final LightChunkGetter lightAccess, final boolean hasSkyLight, final boolean hasBlockLight, final LevelLightEngine lightEngine) {
+ this.lightAccess = lightAccess;
+ this.world = lightAccess == null ? null : (Level)lightAccess.getLevel();
+ this.cachedSkyPropagators = hasSkyLight && lightAccess != null ? new ArrayDeque<>() : null;
+ this.cachedBlockPropagators = hasBlockLight && lightAccess != null ? new ArrayDeque<>() : null;
+ this.isClientSide = !(this.world instanceof ServerLevel);
+ if (this.world == null) {
+ this.minSection = -4;
+ this.maxSection = 19;
+ this.minLightSection = -5;
+ this.maxLightSection = 20;
+ } else {
+ this.minSection = WorldUtil.getMinSection(this.world);
+ this.maxSection = WorldUtil.getMaxSection(this.world);
+ this.minLightSection = WorldUtil.getMinLightSection(this.world);
+ this.maxLightSection = WorldUtil.getMaxLightSection(this.world);
+ }
+ this.lightEngine = lightEngine;
+ this.hasBlockLight = hasBlockLight;
+ this.hasSkyLight = hasSkyLight;
+ this.skyReader = !hasSkyLight ? LayerLightEventListener.DummyLightLayerEventListener.INSTANCE : new LayerLightEventListener() {
+ @Override
+ public void checkBlock(final BlockPos blockPos) {
+ StarLightInterface.this.lightEngine.checkBlock(blockPos.immutable());
+ }
+
+ @Override
+ public void onBlockEmissionIncrease(final BlockPos blockPos, final int i) {
+ // skylight doesn't care
+ }
+
+ @Override
+ public boolean hasLightWork() {
+ // not really correct...
+ return StarLightInterface.this.hasUpdates();
+ }
+
+ @Override
+ public int runUpdates(final int i, final boolean bl, final boolean bl2) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void enableLightSources(final ChunkPos chunkPos, final boolean bl) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public DataLayer getDataLayerData(final SectionPos pos) {
+ final ChunkAccess chunk = StarLightInterface.this.getAnyChunkNow(pos.getX(), pos.getZ());
+ if (chunk == null || (!StarLightInterface.this.isClientSide && !chunk.isLightCorrect()) || !chunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) {
+ return null;
+ }
+
+ final int sectionY = pos.getY();
+
+ if (sectionY > StarLightInterface.this.maxLightSection || sectionY < StarLightInterface.this.minLightSection) {
+ return null;
+ }
+
+ if (chunk.getSkyEmptinessMap() == null) {
+ return null;
+ }
+
+ return chunk.getSkyNibbles()[sectionY - StarLightInterface.this.minLightSection].toVanillaNibble();
+ }
+
+ @Override
+ public int getLightValue(final BlockPos blockPos) {
+ return StarLightInterface.this.getSkyLightValue(blockPos, StarLightInterface.this.getAnyChunkNow(blockPos.getX() >> 4, blockPos.getZ() >> 4));
+ }
+
+ @Override
+ public void updateSectionStatus(final SectionPos pos, final boolean notReady) {
+ StarLightInterface.this.sectionChange(pos, notReady);
+ }
+ };
+ this.blockReader = !hasBlockLight ? LayerLightEventListener.DummyLightLayerEventListener.INSTANCE : new LayerLightEventListener() {
+ @Override
+ public void checkBlock(final BlockPos blockPos) {
+ StarLightInterface.this.lightEngine.checkBlock(blockPos.immutable());
+ }
+
+ @Override
+ public void onBlockEmissionIncrease(final BlockPos blockPos, final int i) {
+ this.checkBlock(blockPos);
+ }
+
+ @Override
+ public boolean hasLightWork() {
+ // not really correct...
+ return StarLightInterface.this.hasUpdates();
+ }
+
+ @Override
+ public int runUpdates(final int i, final boolean bl, final boolean bl2) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void enableLightSources(final ChunkPos chunkPos, final boolean bl) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public DataLayer getDataLayerData(final SectionPos pos) {
+ final ChunkAccess chunk = StarLightInterface.this.getAnyChunkNow(pos.getX(), pos.getZ());
+
+ if (chunk == null || pos.getY() < StarLightInterface.this.minLightSection || pos.getY() > StarLightInterface.this.maxLightSection) {
+ return null;
+ }
+
+ return chunk.getBlockNibbles()[pos.getY() - StarLightInterface.this.minLightSection].toVanillaNibble();
+ }
+
+ @Override
+ public int getLightValue(final BlockPos blockPos) {
+ return StarLightInterface.this.getBlockLightValue(blockPos, StarLightInterface.this.getAnyChunkNow(blockPos.getX() >> 4, blockPos.getZ() >> 4));
+ }
+
+ @Override
+ public void updateSectionStatus(final SectionPos pos, final boolean notReady) {
+ StarLightInterface.this.sectionChange(pos, notReady);
+ }
+ };
+ }
+
+ protected int getSkyLightValue(final BlockPos blockPos, final ChunkAccess chunk) {
+ if (!this.hasSkyLight) {
+ return 0;
+ }
+ final int x = blockPos.getX();
+ int y = blockPos.getY();
+ final int z = blockPos.getZ();
+
+ final int minSection = this.minSection;
+ final int maxSection = this.maxSection;
+ final int minLightSection = this.minLightSection;
+ final int maxLightSection = this.maxLightSection;
+
+ if (chunk == null || (!this.isClientSide && !chunk.isLightCorrect()) || !chunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) {
+ return 15;
+ }
+
+ int sectionY = y >> 4;
+
+ if (sectionY > maxLightSection) {
+ return 15;
+ }
+
+ if (sectionY < minLightSection) {
+ sectionY = minLightSection;
+ y = sectionY << 4;
+ }
+
+ final SWMRNibbleArray[] nibbles = chunk.getSkyNibbles();
+ final SWMRNibbleArray immediate = nibbles[sectionY - minLightSection];
+
+ if (!immediate.isNullNibbleVisible()) {
+ return immediate.getVisible(x, y, z);
+ }
+
+ final boolean[] emptinessMap = chunk.getSkyEmptinessMap();
+
+ if (emptinessMap == null) {
+ return 15;
+ }
+
+ // are we above this chunk's lowest empty section?
+ int lowestY = minLightSection - 1;
+ for (int currY = maxSection; currY >= minSection; --currY) {
+ if (emptinessMap[currY - minSection]) {
+ continue;
+ }
+
+ // should always be full lit here
+ lowestY = currY;
+ break;
+ }
+
+ if (sectionY > lowestY) {
+ return 15;
+ }
+
+ // this nibble is going to depend solely on the skylight data above it
+ // find first non-null data above (there does exist one, as we just found it above)
+ for (int currY = sectionY + 1; currY <= maxLightSection; ++currY) {
+ final SWMRNibbleArray nibble = nibbles[currY - minLightSection];
+ if (!nibble.isNullNibbleVisible()) {
+ return nibble.getVisible(x, 0, z);
+ }
+ }
+
+ // should never reach here
+ return 15;
+ }
+
+ protected int getBlockLightValue(final BlockPos blockPos, final ChunkAccess chunk) {
+ if (!this.hasBlockLight) {
+ return 0;
+ }
+ final int y = blockPos.getY();
+ final int cy = y >> 4;
+
+ final int minLightSection = this.minLightSection;
+ final int maxLightSection = this.maxLightSection;
+
+ if (cy < minLightSection || cy > maxLightSection) {
+ return 0;
+ }
+
+ if (chunk == null) {
+ return 0;
+ }
+
+ final SWMRNibbleArray nibble = chunk.getBlockNibbles()[cy - minLightSection];
+ return nibble.getVisible(blockPos.getX(), y, blockPos.getZ());
+ }
+
+ public int getRawBrightness(final BlockPos pos, final int ambientDarkness) {
+ final ChunkAccess chunk = this.getAnyChunkNow(pos.getX() >> 4, pos.getZ() >> 4);
+
+ final int sky = this.getSkyLightValue(pos, chunk) - ambientDarkness;
+ // Don't fetch the block light level if the skylight level is 15, since the value will never be higher.
+ if (sky == 15) return 15;
+ final int block = this.getBlockLightValue(pos, chunk);
+ return Math.max(sky, block);
+ }
+
+ public LayerLightEventListener getSkyReader() {
+ return this.skyReader;
+ }
+
+ public LayerLightEventListener getBlockReader() {
+ return this.blockReader;
+ }
+
+ public boolean isClientSide() {
+ return this.isClientSide;
+ }
+
+ public ChunkAccess getAnyChunkNow(final int chunkX, final int chunkZ) {
+ if (this.world == null) {
+ // empty world
+ return null;
+ }
+
+ final ServerChunkCache chunkProvider = ((ServerLevel)this.world).getChunkSource();
+ final LevelChunk fullLoaded = chunkProvider.getChunkAtIfLoadedImmediately(chunkX, chunkZ);
+ if (fullLoaded != null) {
+ return fullLoaded;
+ }
+
+ return chunkProvider.getChunkAtImmediately(chunkX, chunkZ);
+ }
+
+ public boolean hasUpdates() {
+ return !this.lightQueue.isEmpty();
+ }
+
+ public Level getWorld() {
+ return this.world;
+ }
+
+ public LightChunkGetter getLightAccess() {
+ return this.lightAccess;
+ }
+
+ protected final SkyStarLightEngine getSkyLightEngine() {
+ if (this.cachedSkyPropagators == null) {
+ return null;
+ }
+ final SkyStarLightEngine ret;
+ synchronized (this.cachedSkyPropagators) {
+ ret = this.cachedSkyPropagators.pollFirst();
+ }
+
+ if (ret == null) {
+ return new SkyStarLightEngine(this.world);
+ }
+ return ret;
+ }
+
+ protected final void releaseSkyLightEngine(final SkyStarLightEngine engine) {
+ if (this.cachedSkyPropagators == null) {
+ return;
+ }
+ synchronized (this.cachedSkyPropagators) {
+ this.cachedSkyPropagators.addFirst(engine);
+ }
+ }
+
+ protected final BlockStarLightEngine getBlockLightEngine() {
+ if (this.cachedBlockPropagators == null) {
+ return null;
+ }
+ final BlockStarLightEngine ret;
+ synchronized (this.cachedBlockPropagators) {
+ ret = this.cachedBlockPropagators.pollFirst();
+ }
+
+ if (ret == null) {
+ return new BlockStarLightEngine(this.world);
+ }
+ return ret;
+ }
+
+ protected final void releaseBlockLightEngine(final BlockStarLightEngine engine) {
+ if (this.cachedBlockPropagators == null) {
+ return;
+ }
+ synchronized (this.cachedBlockPropagators) {
+ this.cachedBlockPropagators.addFirst(engine);
+ }
+ }
+
+ public CompletableFuture<Void> blockChange(final BlockPos pos) {
+ if (this.world == null || pos.getY() < WorldUtil.getMinBlockY(this.world) || pos.getY() > WorldUtil.getMaxBlockY(this.world)) { // empty world
+ return null;
+ }
+
+ return this.lightQueue.queueBlockChange(pos);
+ }
+
+ public CompletableFuture<Void> sectionChange(final SectionPos pos, final boolean newEmptyValue) {
+ if (this.world == null) { // empty world
+ return null;
+ }
+
+ return this.lightQueue.queueSectionChange(pos, newEmptyValue);
+ }
+
+ public void forceLoadInChunk(final ChunkAccess chunk, final Boolean[] emptySections) {
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+
+ try {
+ if (skyEngine != null) {
+ skyEngine.forceHandleEmptySectionChanges(this.lightAccess, chunk, emptySections);
+ }
+ if (blockEngine != null) {
+ blockEngine.forceHandleEmptySectionChanges(this.lightAccess, chunk, emptySections);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ public void loadInChunk(final int chunkX, final int chunkZ, final Boolean[] emptySections) {
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+
+ try {
+ if (skyEngine != null) {
+ skyEngine.handleEmptySectionChanges(this.lightAccess, chunkX, chunkZ, emptySections);
+ }
+ if (blockEngine != null) {
+ blockEngine.handleEmptySectionChanges(this.lightAccess, chunkX, chunkZ, emptySections);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ public void lightChunk(final ChunkAccess chunk, final Boolean[] emptySections) {
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+
+ try {
+ if (skyEngine != null) {
+ skyEngine.light(this.lightAccess, chunk, emptySections);
+ }
+ if (blockEngine != null) {
+ blockEngine.light(this.lightAccess, chunk, emptySections);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ public void relightChunks(final Set<ChunkPos> chunks, final Consumer<ChunkPos> chunkLightCallback,
+ final IntConsumer onComplete) {
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+
+ try {
+ if (skyEngine != null) {
+ skyEngine.relightChunks(this.lightAccess, chunks, blockEngine == null ? chunkLightCallback : null,
+ blockEngine == null ? onComplete : null);
+ }
+ if (blockEngine != null) {
+ blockEngine.relightChunks(this.lightAccess, chunks, chunkLightCallback, onComplete);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ public void checkChunkEdges(final int chunkX, final int chunkZ) {
+ this.checkSkyEdges(chunkX, chunkZ);
+ this.checkBlockEdges(chunkX, chunkZ);
+ }
+
+ public void checkSkyEdges(final int chunkX, final int chunkZ) {
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+
+ try {
+ if (skyEngine != null) {
+ skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ }
+ }
+
+ public void checkBlockEdges(final int chunkX, final int chunkZ) {
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+ try {
+ if (blockEngine != null) {
+ blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ);
+ }
+ } finally {
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ public void checkSkyEdges(final int chunkX, final int chunkZ, final ShortCollection sections) {
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+
+ try {
+ if (skyEngine != null) {
+ skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, sections);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ }
+ }
+
+ public void checkBlockEdges(final int chunkX, final int chunkZ, final ShortCollection sections) {
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+ try {
+ if (blockEngine != null) {
+ blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, sections);
+ }
+ } finally {
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ public void scheduleChunkLight(final ChunkPos pos, final Runnable run) {
+ this.lightQueue.queueChunkLighting(pos, run);
+ }
+
+ public void removeChunkTasks(final ChunkPos pos) {
+ this.lightQueue.removeChunk(pos);
+ }
+
+ public void propagateChanges() {
+ if (this.lightQueue.isEmpty()) {
+ return;
+ }
+
+ final SkyStarLightEngine skyEngine = this.getSkyLightEngine();
+ final BlockStarLightEngine blockEngine = this.getBlockLightEngine();
+
+ try {
+ LightQueue.ChunkTasks task;
+ while ((task = this.lightQueue.removeFirstTask()) != null) {
+ if (task.lightTasks != null) {
+ for (final Runnable run : task.lightTasks) {
+ run.run();
+ }
+ }
+
+ final long coordinate = task.chunkCoordinate;
+ final int chunkX = CoordinateUtils.getChunkX(coordinate);
+ final int chunkZ = CoordinateUtils.getChunkZ(coordinate);
+
+ final Set<BlockPos> positions = task.changedPositions;
+ final Boolean[] sectionChanges = task.changedSectionSet;
+
+ if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) {
+ skyEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges);
+ }
+ if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) {
+ blockEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges);
+ }
+
+ if (skyEngine != null && task.queuedEdgeChecksSky != null) {
+ skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksSky);
+ }
+ if (blockEngine != null && task.queuedEdgeChecksBlock != null) {
+ blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksBlock);
+ }
+
+ task.onComplete.complete(null);
+ }
+ } finally {
+ this.releaseSkyLightEngine(skyEngine);
+ this.releaseBlockLightEngine(blockEngine);
+ }
+ }
+
+ protected static final class LightQueue {
+
+ protected final Long2ObjectLinkedOpenHashMap<ChunkTasks> chunkTasks = new Long2ObjectLinkedOpenHashMap<>();
+ protected final StarLightInterface manager;
+
+ public LightQueue(final StarLightInterface manager) {
+ this.manager = manager;
+ }
+
+ public synchronized boolean isEmpty() {
+ return this.chunkTasks.isEmpty();
+ }
+
+ public synchronized CompletableFuture<Void> queueBlockChange(final BlockPos pos) {
+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new);
+ tasks.changedPositions.add(pos.immutable());
+ return tasks.onComplete;
+ }
+
+ public synchronized CompletableFuture<Void> queueSectionChange(final SectionPos pos, final boolean newEmptyValue) {
+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new);
+
+ if (tasks.changedSectionSet == null) {
+ tasks.changedSectionSet = new Boolean[this.manager.maxSection - this.manager.minSection + 1];
+ }
+ tasks.changedSectionSet[pos.getY() - this.manager.minSection] = Boolean.valueOf(newEmptyValue);
+
+ return tasks.onComplete;
+ }
+
+ public synchronized CompletableFuture<Void> queueChunkLighting(final ChunkPos pos, final Runnable lightTask) {
+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new);
+ if (tasks.lightTasks == null) {
+ tasks.lightTasks = new ArrayList<>();
+ }
+ tasks.lightTasks.add(lightTask);
+
+ return tasks.onComplete;
+ }
+
+ public synchronized CompletableFuture<Void> queueChunkSkylightEdgeCheck(final SectionPos pos, final ShortCollection sections) {
+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new);
+
+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksSky;
+ if (queuedEdges == null) {
+ queuedEdges = tasks.queuedEdgeChecksSky = new ShortOpenHashSet();
+ }
+ queuedEdges.addAll(sections);
+
+ return tasks.onComplete;
+ }
+
+ public synchronized CompletableFuture<Void> queueChunkBlocklightEdgeCheck(final SectionPos pos, final ShortCollection sections) {
+ final ChunkTasks tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), ChunkTasks::new);
+
+ ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksBlock;
+ if (queuedEdges == null) {
+ queuedEdges = tasks.queuedEdgeChecksBlock = new ShortOpenHashSet();
+ }
+ queuedEdges.addAll(sections);
+
+ return tasks.onComplete;
+ }
+
+ public void removeChunk(final ChunkPos pos) {
+ final ChunkTasks tasks;
+ synchronized (this) {
+ tasks = this.chunkTasks.remove(CoordinateUtils.getChunkKey(pos));
+ }
+ if (tasks != null) {
+ tasks.onComplete.complete(null);
+ }
+ }
+
+ public synchronized ChunkTasks removeFirstTask() {
+ if (this.chunkTasks.isEmpty()) {
+ return null;
+ }
+ return this.chunkTasks.removeFirst();
+ }
+
+ protected static final class ChunkTasks {
+
+ public final Set<BlockPos> changedPositions = new ObjectOpenHashSet<>();
+ public Boolean[] changedSectionSet;
+ public ShortOpenHashSet queuedEdgeChecksSky;
+ public ShortOpenHashSet queuedEdgeChecksBlock;
+ public List<Runnable> lightTasks;
+
+ public final CompletableFuture<Void> onComplete = new CompletableFuture<>();
+
+ public final long chunkCoordinate;
+
+ public ChunkTasks(final long chunkCoordinate) {
+ this.chunkCoordinate = chunkCoordinate;
+ }
+ }
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/CoordinateUtils.java b/src/main/java/ca/spottedleaf/starlight/common/util/CoordinateUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..16a4a14e7ccf9e4d7fdf1166674fe8f529c06d39
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/util/CoordinateUtils.java
@@ -0,0 +1,128 @@
+package ca.spottedleaf.starlight.common.util;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.SectionPos;
+import net.minecraft.util.Mth;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.ChunkPos;
+
+public final class CoordinateUtils {
+
+ // dx, dz are relative to the target chunk
+ // dx, dz in [-radius, radius]
+ public static int getNeighbourMappedIndex(final int dx, final int dz, final int radius) {
+ return (dx + radius) + (2 * radius + 1)*(dz + radius);
+ }
+
+ // the chunk keys are compatible with vanilla
+
+ public static long getChunkKey(final BlockPos pos) {
+ return ((long)(pos.getZ() >> 4) << 32) | ((pos.getX() >> 4) & 0xFFFFFFFFL);
+ }
+
+ public static long getChunkKey(final Entity entity) {
+ return ((long)(Mth.floor(entity.getZ()) >> 4) << 32) | ((Mth.floor(entity.getX()) >> 4) & 0xFFFFFFFFL);
+ }
+
+ public static long getChunkKey(final ChunkPos pos) {
+ return ((long)pos.z << 32) | (pos.x & 0xFFFFFFFFL);
+ }
+
+ public static long getChunkKey(final SectionPos pos) {
+ return ((long)pos.getZ() << 32) | (pos.getX() & 0xFFFFFFFFL);
+ }
+
+ public static long getChunkKey(final int x, final int z) {
+ return ((long)z << 32) | (x & 0xFFFFFFFFL);
+ }
+
+ public static int getChunkX(final long chunkKey) {
+ return (int)chunkKey;
+ }
+
+ public static int getChunkZ(final long chunkKey) {
+ return (int)(chunkKey >>> 32);
+ }
+
+ public static int getChunkCoordinate(final double blockCoordinate) {
+ return Mth.floor(blockCoordinate) >> 4;
+ }
+
+ // the section keys are compatible with vanilla's
+
+ static final int SECTION_X_BITS = 22;
+ static final long SECTION_X_MASK = (1L << SECTION_X_BITS) - 1;
+ static final int SECTION_Y_BITS = 20;
+ static final long SECTION_Y_MASK = (1L << SECTION_Y_BITS) - 1;
+ static final int SECTION_Z_BITS = 22;
+ static final long SECTION_Z_MASK = (1L << SECTION_Z_BITS) - 1;
+ // format is y,z,x (in order of LSB to MSB)
+ static final int SECTION_Y_SHIFT = 0;
+ static final int SECTION_Z_SHIFT = SECTION_Y_SHIFT + SECTION_Y_BITS;
+ static final int SECTION_X_SHIFT = SECTION_Z_SHIFT + SECTION_X_BITS;
+ static final int SECTION_TO_BLOCK_SHIFT = 4;
+
+ public static long getChunkSectionKey(final int x, final int y, final int z) {
+ return ((x & SECTION_X_MASK) << SECTION_X_SHIFT)
+ | ((y & SECTION_Y_MASK) << SECTION_Y_SHIFT)
+ | ((z & SECTION_Z_MASK) << SECTION_Z_SHIFT);
+ }
+
+ public static long getChunkSectionKey(final SectionPos pos) {
+ return ((pos.getX() & SECTION_X_MASK) << SECTION_X_SHIFT)
+ | ((pos.getY() & SECTION_Y_MASK) << SECTION_Y_SHIFT)
+ | ((pos.getZ() & SECTION_Z_MASK) << SECTION_Z_SHIFT);
+ }
+
+ public static long getChunkSectionKey(final ChunkPos pos, final int y) {
+ return ((pos.x & SECTION_X_MASK) << SECTION_X_SHIFT)
+ | ((y & SECTION_Y_MASK) << SECTION_Y_SHIFT)
+ | ((pos.z & SECTION_Z_MASK) << SECTION_Z_SHIFT);
+ }
+
+ public static long getChunkSectionKey(final BlockPos pos) {
+ return (((long)pos.getX() << (SECTION_X_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_X_MASK << SECTION_X_SHIFT)) |
+ ((pos.getY() >> SECTION_TO_BLOCK_SHIFT) & (SECTION_Y_MASK << SECTION_Y_SHIFT)) |
+ (((long)pos.getZ() << (SECTION_Z_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_Z_MASK << SECTION_Z_SHIFT));
+ }
+
+ public static long getChunkSectionKey(final Entity entity) {
+ return ((Mth.lfloor(entity.getX()) << (SECTION_X_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_X_MASK << SECTION_X_SHIFT)) |
+ ((Mth.lfloor(entity.getY()) >> SECTION_TO_BLOCK_SHIFT) & (SECTION_Y_MASK << SECTION_Y_SHIFT)) |
+ ((Mth.lfloor(entity.getZ()) << (SECTION_Z_SHIFT - SECTION_TO_BLOCK_SHIFT)) & (SECTION_Z_MASK << SECTION_Z_SHIFT));
+ }
+
+ public static int getChunkSectionX(final long key) {
+ return (int)(key << (Long.SIZE - (SECTION_X_SHIFT + SECTION_X_BITS)) >> (Long.SIZE - SECTION_X_BITS));
+ }
+
+ public static int getChunkSectionY(final long key) {
+ return (int)(key << (Long.SIZE - (SECTION_Y_SHIFT + SECTION_Y_BITS)) >> (Long.SIZE - SECTION_Y_BITS));
+ }
+
+ public static int getChunkSectionZ(final long key) {
+ return (int)(key << (Long.SIZE - (SECTION_Z_SHIFT + SECTION_Z_BITS)) >> (Long.SIZE - SECTION_Z_BITS));
+ }
+
+ // the block coordinates are not necessarily compatible with vanilla's
+
+ public static int getBlockCoordinate(final double blockCoordinate) {
+ return Mth.floor(blockCoordinate);
+ }
+
+ public static long getBlockKey(final int x, final int y, final int z) {
+ return ((long)x & 0x7FFFFFF) | (((long)z & 0x7FFFFFF) << 27) | ((long)y << 54);
+ }
+
+ public static long getBlockKey(final BlockPos pos) {
+ return ((long)pos.getX() & 0x7FFFFFF) | (((long)pos.getZ() & 0x7FFFFFF) << 27) | ((long)pos.getY() << 54);
+ }
+
+ public static long getBlockKey(final Entity entity) {
+ return ((long)entity.getX() & 0x7FFFFFF) | (((long)entity.getZ() & 0x7FFFFFF) << 27) | ((long)entity.getY() << 54);
+ }
+
+ private CoordinateUtils() {
+ throw new RuntimeException();
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/IntegerUtil.java b/src/main/java/ca/spottedleaf/starlight/common/util/IntegerUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..177d0a969f3d72a34e773e8309c3719a235ee06d
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/util/IntegerUtil.java
@@ -0,0 +1,226 @@
+package ca.spottedleaf.starlight.common.util;
+
+public final class IntegerUtil {
+
+ public static final int HIGH_BIT_U32 = Integer.MIN_VALUE;
+ public static final long HIGH_BIT_U64 = Long.MIN_VALUE;
+
+ public static int ceilLog2(final int value) {
+ return Integer.SIZE - Integer.numberOfLeadingZeros(value - 1); // see doc of numberOfLeadingZeros
+ }
+
+ public static long ceilLog2(final long value) {
+ return Long.SIZE - Long.numberOfLeadingZeros(value - 1); // see doc of numberOfLeadingZeros
+ }
+
+ public static int floorLog2(final int value) {
+ // xor is optimized subtract for 2^n -1
+ // note that (2^n -1) - k = (2^n -1) ^ k for k <= (2^n - 1)
+ return (Integer.SIZE - 1) ^ Integer.numberOfLeadingZeros(value); // see doc of numberOfLeadingZeros
+ }
+
+ public static int floorLog2(final long value) {
+ // xor is optimized subtract for 2^n -1
+ // note that (2^n -1) - k = (2^n -1) ^ k for k <= (2^n - 1)
+ return (Long.SIZE - 1) ^ Long.numberOfLeadingZeros(value); // see doc of numberOfLeadingZeros
+ }
+
+ public static int roundCeilLog2(final int value) {
+ // optimized variant of 1 << (32 - leading(val - 1))
+ // given
+ // 1 << n = HIGH_BIT_32 >>> (31 - n) for n [0, 32)
+ // 1 << (32 - leading(val - 1)) = HIGH_BIT_32 >>> (31 - (32 - leading(val - 1)))
+ // HIGH_BIT_32 >>> (31 - (32 - leading(val - 1)))
+ // HIGH_BIT_32 >>> (31 - 32 + leading(val - 1))
+ // HIGH_BIT_32 >>> (-1 + leading(val - 1))
+ return HIGH_BIT_U32 >>> (Integer.numberOfLeadingZeros(value - 1) - 1);
+ }
+
+ public static long roundCeilLog2(final long value) {
+ // see logic documented above
+ return HIGH_BIT_U64 >>> (Long.numberOfLeadingZeros(value - 1) - 1);
+ }
+
+ public static int roundFloorLog2(final int value) {
+ // optimized variant of 1 << (31 - leading(val))
+ // given
+ // 1 << n = HIGH_BIT_32 >>> (31 - n) for n [0, 32)
+ // 1 << (31 - leading(val)) = HIGH_BIT_32 >> (31 - (31 - leading(val)))
+ // HIGH_BIT_32 >> (31 - (31 - leading(val)))
+ // HIGH_BIT_32 >> (31 - 31 + leading(val))
+ return HIGH_BIT_U32 >>> Integer.numberOfLeadingZeros(value);
+ }
+
+ public static long roundFloorLog2(final long value) {
+ // see logic documented above
+ return HIGH_BIT_U64 >>> Long.numberOfLeadingZeros(value);
+ }
+
+ public static boolean isPowerOfTwo(final int n) {
+ // 2^n has one bit
+ // note: this rets true for 0 still
+ return IntegerUtil.getTrailingBit(n) == n;
+ }
+
+ public static boolean isPowerOfTwo(final long n) {
+ // 2^n has one bit
+ // note: this rets true for 0 still
+ return IntegerUtil.getTrailingBit(n) == n;
+ }
+
+ public static int getTrailingBit(final int n) {
+ return -n & n;
+ }
+
+ public static long getTrailingBit(final long n) {
+ return -n & n;
+ }
+
+ public static int trailingZeros(final int n) {
+ return Integer.numberOfTrailingZeros(n);
+ }
+
+ public static int trailingZeros(final long n) {
+ return Long.numberOfTrailingZeros(n);
+ }
+
+ // from hacker's delight (signed division magic value)
+ public static int getDivisorMultiple(final long numbers) {
+ return (int)(numbers >>> 32);
+ }
+
+ // from hacker's delight (signed division magic value)
+ public static int getDivisorShift(final long numbers) {
+ return (int)numbers;
+ }
+
+ // copied from hacker's delight (signed division magic value)
+ // http://www.hackersdelight.org/hdcodetxt/magic.c.txt
+ public static long getDivisorNumbers(final int d) {
+ final int ad = IntegerUtil.branchlessAbs(d);
+
+ if (ad < 2) {
+ throw new IllegalArgumentException("|number| must be in [2, 2^31 -1], not: " + d);
+ }
+
+ final int two31 = 0x80000000;
+ final long mask = 0xFFFFFFFFL; // mask for enforcing unsigned behaviour
+
+ int p = 31;
+
+ // all these variables are UNSIGNED!
+ int t = two31 + (d >>> 31);
+ int anc = t - 1 - t%ad;
+ int q1 = (int)((two31 & mask)/(anc & mask));
+ int r1 = two31 - q1*anc;
+ int q2 = (int)((two31 & mask)/(ad & mask));
+ int r2 = two31 - q2*ad;
+ int delta;
+
+ do {
+ p = p + 1;
+ q1 = 2*q1; // Update q1 = 2**p/|nc|.
+ r1 = 2*r1; // Update r1 = rem(2**p, |nc|).
+ if ((r1 & mask) >= (anc & mask)) {// (Must be an unsigned comparison here)
+ q1 = q1 + 1;
+ r1 = r1 - anc;
+ }
+ q2 = 2*q2; // Update q2 = 2**p/|d|.
+ r2 = 2*r2; // Update r2 = rem(2**p, |d|).
+ if ((r2 & mask) >= (ad & mask)) {// (Must be an unsigned comparison here)
+ q2 = q2 + 1;
+ r2 = r2 - ad;
+ }
+ delta = ad - r2;
+ } while ((q1 & mask) < (delta & mask) || (q1 == delta && r1 == 0));
+
+ int magicNum = q2 + 1;
+ if (d < 0) {
+ magicNum = -magicNum;
+ }
+ int shift = p - 32;
+ return ((long)magicNum << 32) | shift;
+ }
+
+ public static int branchlessAbs(final int val) {
+ // -n = -1 ^ n + 1
+ final int mask = val >> (Integer.SIZE - 1); // -1 if < 0, 0 if >= 0
+ return (mask ^ val) - mask; // if val < 0, then (0 ^ val) - 0 else (-1 ^ val) + 1
+ }
+
+ public static long branchlessAbs(final long val) {
+ // -n = -1 ^ n + 1
+ final long mask = val >> (Long.SIZE - 1); // -1 if < 0, 0 if >= 0
+ return (mask ^ val) - mask; // if val < 0, then (0 ^ val) - 0 else (-1 ^ val) + 1
+ }
+
+ //https://github.com/skeeto/hash-prospector for hash functions
+
+ //score = ~590.47984224483832
+ public static int hash0(int x) {
+ x *= 0x36935555;
+ x ^= x >>> 16;
+ return x;
+ }
+
+ //score = ~310.01596637036749
+ public static int hash1(int x) {
+ x ^= x >>> 15;
+ x *= 0x356aaaad;
+ x ^= x >>> 17;
+ return x;
+ }
+
+ public static int hash2(int x) {
+ x ^= x >>> 16;
+ x *= 0x7feb352d;
+ x ^= x >>> 15;
+ x *= 0x846ca68b;
+ x ^= x >>> 16;
+ return x;
+ }
+
+ public static int hash3(int x) {
+ x ^= x >>> 17;
+ x *= 0xed5ad4bb;
+ x ^= x >>> 11;
+ x *= 0xac4c1b51;
+ x ^= x >>> 15;
+ x *= 0x31848bab;
+ x ^= x >>> 14;
+ return x;
+ }
+
+ //score = ~365.79959673201887
+ public static long hash1(long x) {
+ x ^= x >>> 27;
+ x *= 0xb24924b71d2d354bL;
+ x ^= x >>> 28;
+ return x;
+ }
+
+ //h2 hash
+ public static long hash2(long x) {
+ x ^= x >>> 32;
+ x *= 0xd6e8feb86659fd93L;
+ x ^= x >>> 32;
+ x *= 0xd6e8feb86659fd93L;
+ x ^= x >>> 32;
+ return x;
+ }
+
+ public static long hash3(long x) {
+ x ^= x >>> 45;
+ x *= 0xc161abe5704b6c79L;
+ x ^= x >>> 41;
+ x *= 0xe3e5389aedbc90f7L;
+ x ^= x >>> 56;
+ x *= 0x1f9aba75a52db073L;
+ x ^= x >>> 53;
+ return x;
+ }
+
+ private IntegerUtil() {
+ throw new RuntimeException();
+ }
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/SaveUtil.java b/src/main/java/ca/spottedleaf/starlight/common/util/SaveUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..6df9e01731d7fcbe279736b8fc18396595b95574
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/util/SaveUtil.java
@@ -0,0 +1,192 @@
+package ca.spottedleaf.starlight.common.util;
+
+import ca.spottedleaf.starlight.common.light.SWMRNibbleArray;
+import ca.spottedleaf.starlight.common.light.StarLightEngine;
+import com.mojang.logging.LogUtils;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import org.slf4j.Logger;
+
+public final class SaveUtil {
+
+ private static final Logger LOGGER = LogUtils.getLogger();
+
+ private static final int STARLIGHT_LIGHT_VERSION = 8;
+
+ public static int getLightVersion() {
+ return STARLIGHT_LIGHT_VERSION;
+ }
+
+ private static final String BLOCKLIGHT_STATE_TAG = "starlight.blocklight_state";
+ private static final String SKYLIGHT_STATE_TAG = "starlight.skylight_state";
+ private static final String STARLIGHT_VERSION_TAG = "starlight.light_version";
+
+ public static void saveLightHook(final Level world, final ChunkAccess chunk, final CompoundTag nbt) {
+ try {
+ saveLightHookReal(world, chunk, nbt);
+ } catch (final Throwable ex) {
+ // failing to inject is not fatal so we catch anything here. if it fails, it will have correctly set lit to false
+ // for Vanilla to relight on load and it will not set our lit tag so we will relight on load
+ if (ex instanceof ThreadDeath) {
+ throw (ThreadDeath)ex;
+ }
+ LOGGER.warn("Failed to inject light data into save data for chunk " + chunk.getPos() + ", chunk light will be recalculated on its next load", ex);
+ }
+ }
+
+ private static void saveLightHookReal(final Level world, final ChunkAccess chunk, final CompoundTag tag) {
+ if (tag == null) {
+ return;
+ }
+
+ final int minSection = WorldUtil.getMinLightSection(world);
+ final int maxSection = WorldUtil.getMaxLightSection(world);
+
+ SWMRNibbleArray[] blockNibbles = chunk.getBlockNibbles();
+ SWMRNibbleArray[] skyNibbles = chunk.getSkyNibbles();
+
+ boolean lit = chunk.isLightCorrect() || !(world instanceof ServerLevel);
+ // diff start - store our tag for whether light data is init'd
+ if (lit) {
+ tag.putBoolean("isLightOn", false);
+ }
+ // diff end - store our tag for whether light data is init'd
+ ChunkStatus status = ChunkStatus.byName(tag.getString("Status"));
+
+ CompoundTag[] sections = new CompoundTag[maxSection - minSection + 1];
+
+ ListTag sectionsStored = tag.getList("sections", 10);
+
+ for (int i = 0; i < sectionsStored.size(); ++i) {
+ CompoundTag sectionStored = sectionsStored.getCompound(i);
+ int k = sectionStored.getByte("Y");
+
+ // strip light data
+ sectionStored.remove("BlockLight");
+ sectionStored.remove("SkyLight");
+
+ if (!sectionStored.isEmpty()) {
+ sections[k - minSection] = sectionStored;
+ }
+ }
+
+ if (lit && status.isOrAfter(ChunkStatus.LIGHT)) {
+ for (int i = minSection; i <= maxSection; ++i) {
+ SWMRNibbleArray.SaveState blockNibble = blockNibbles[i - minSection].getSaveState();
+ SWMRNibbleArray.SaveState skyNibble = skyNibbles[i - minSection].getSaveState();
+ if (blockNibble != null || skyNibble != null) {
+ CompoundTag section = sections[i - minSection];
+ if (section == null) {
+ section = new CompoundTag();
+ section.putByte("Y", (byte)i);
+ sections[i - minSection] = section;
+ }
+
+ // we store under the same key so mod programs editing nbt
+ // can still read the data, hopefully.
+ // however, for compatibility we store chunks as unlit so vanilla
+ // is forced to re-light them if it encounters our data. It's too much of a burden
+ // to try and maintain compatibility with a broken and inferior skylight management system.
+
+ if (blockNibble != null) {
+ if (blockNibble.data != null) {
+ section.putByteArray("BlockLight", blockNibble.data);
+ }
+ section.putInt(BLOCKLIGHT_STATE_TAG, blockNibble.state);
+ }
+
+ if (skyNibble != null) {
+ if (skyNibble.data != null) {
+ section.putByteArray("SkyLight", skyNibble.data);
+ }
+ section.putInt(SKYLIGHT_STATE_TAG, skyNibble.state);
+ }
+ }
+ }
+ }
+
+ // rewrite section list
+ sectionsStored.clear();
+ for (CompoundTag section : sections) {
+ if (section != null) {
+ sectionsStored.add(section);
+ }
+ }
+ tag.put("sections", sectionsStored);
+ if (lit) {
+ tag.putInt(STARLIGHT_VERSION_TAG, STARLIGHT_LIGHT_VERSION); // only mark as fully lit after we have successfully injected our data
+ }
+ }
+
+ public static void loadLightHook(final Level world, final ChunkPos pos, final CompoundTag tag, final ChunkAccess into) {
+ try {
+ loadLightHookReal(world, pos, tag, into);
+ } catch (final Throwable ex) {
+ // failing to inject is not fatal so we catch anything here. if it fails, then we simply relight. Not a problem, we get correct
+ // lighting in both cases.
+ if (ex instanceof ThreadDeath) {
+ throw (ThreadDeath)ex;
+ }
+ LOGGER.warn("Failed to load light for chunk " + pos + ", light will be recalculated", ex);
+ }
+ }
+
+ private static void loadLightHookReal(final Level world, final ChunkPos pos, final CompoundTag tag, final ChunkAccess into) {
+ if (into == null) {
+ return;
+ }
+ final int minSection = WorldUtil.getMinLightSection(world);
+ final int maxSection = WorldUtil.getMaxLightSection(world);
+
+ into.setLightCorrect(false); // mark as unlit in case we fail parsing
+
+ SWMRNibbleArray[] blockNibbles = StarLightEngine.getFilledEmptyLight(world);
+ SWMRNibbleArray[] skyNibbles = StarLightEngine.getFilledEmptyLight(world);
+
+
+ // start copy from the original method
+ boolean lit = tag.get("isLightOn") != null && tag.getInt(STARLIGHT_VERSION_TAG) == STARLIGHT_LIGHT_VERSION;
+ boolean canReadSky = world.dimensionType().hasSkyLight();
+ ChunkStatus status = ChunkStatus.byName(tag.getString("Status"));
+ if (lit && status.isOrAfter(ChunkStatus.LIGHT)) { // diff - we add the status check here
+ ListTag sections = tag.getList("sections", 10);
+
+ for (int i = 0; i < sections.size(); ++i) {
+ CompoundTag sectionData = sections.getCompound(i);
+ int y = sectionData.getByte("Y");
+
+ if (sectionData.contains("BlockLight", 7)) {
+ // this is where our diff is
+ blockNibbles[y - minSection] = new SWMRNibbleArray(sectionData.getByteArray("BlockLight").clone(), sectionData.getInt(BLOCKLIGHT_STATE_TAG)); // clone for data safety
+ } else {
+ blockNibbles[y - minSection] = new SWMRNibbleArray(null, sectionData.getInt(BLOCKLIGHT_STATE_TAG));
+ }
+
+ if (canReadSky) {
+ if (sectionData.contains("SkyLight", 7)) {
+ // we store under the same key so mod programs editing nbt
+ // can still read the data, hopefully.
+ // however, for compatibility we store chunks as unlit so vanilla
+ // is forced to re-light them if it encounters our data. It's too much of a burden
+ // to try and maintain compatibility with a broken and inferior skylight management system.
+ skyNibbles[y - minSection] = new SWMRNibbleArray(sectionData.getByteArray("SkyLight").clone(), sectionData.getInt(SKYLIGHT_STATE_TAG)); // clone for data safety
+ } else {
+ skyNibbles[y - minSection] = new SWMRNibbleArray(null, sectionData.getInt(SKYLIGHT_STATE_TAG));
+ }
+ }
+ }
+ }
+ // end copy from vanilla
+
+ into.setBlockNibbles(blockNibbles);
+ into.setSkyNibbles(skyNibbles);
+ into.setLightCorrect(lit); // now we set lit here, only after we've correctly parsed data
+ }
+
+ private SaveUtil() {}
+}
diff --git a/src/main/java/ca/spottedleaf/starlight/common/util/WorldUtil.java b/src/main/java/ca/spottedleaf/starlight/common/util/WorldUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..dd995e25ae620ae36cd5eecb2fe10ad034ba50d2
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/starlight/common/util/WorldUtil.java
@@ -0,0 +1,47 @@
+package ca.spottedleaf.starlight.common.util;
+
+import net.minecraft.world.level.LevelHeightAccessor;
+
+public final class WorldUtil {
+
+ // min, max are inclusive
+
+ public static int getMaxSection(final LevelHeightAccessor world) {
+ return world.getMaxSection() - 1; // getMaxSection() is exclusive
+ }
+
+ public static int getMinSection(final LevelHeightAccessor world) {
+ return world.getMinSection();
+ }
+
+ public static int getMaxLightSection(final LevelHeightAccessor world) {
+ return getMaxSection(world) + 1;
+ }
+
+ public static int getMinLightSection(final LevelHeightAccessor world) {
+ return getMinSection(world) - 1;
+ }
+
+
+
+ public static int getTotalSections(final LevelHeightAccessor world) {
+ return getMaxSection(world) - getMinSection(world) + 1;
+ }
+
+ public static int getTotalLightSections(final LevelHeightAccessor world) {
+ return getMaxLightSection(world) - getMinLightSection(world) + 1;
+ }
+
+ public static int getMinBlockY(final LevelHeightAccessor world) {
+ return getMinSection(world) << 4;
+ }
+
+ public static int getMaxBlockY(final LevelHeightAccessor world) {
+ return (getMaxSection(world) << 4) | 15;
+ }
+
+ private WorldUtil() {
+ throw new RuntimeException();
+ }
+
+}
diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java
index 156334e3876d966fedc91d18da29f562395ab182..268b243f76b632fc8eea08bba4657a5100b5dfc7 100644
--- a/src/main/java/io/papermc/paper/command/PaperCommand.java
+++ b/src/main/java/io/papermc/paper/command/PaperCommand.java
@@ -1,6 +1,7 @@
package io.papermc.paper.command;
import io.papermc.paper.command.subcommands.EntityCommand;
+import io.papermc.paper.command.subcommands.FixLightCommand;
import io.papermc.paper.command.subcommands.HeapDumpCommand;
import io.papermc.paper.command.subcommands.ReloadCommand;
import io.papermc.paper.command.subcommands.VersionCommand;
@@ -42,6 +43,7 @@ public final class PaperCommand extends Command {
commands.put(Set.of("reload"), new ReloadCommand());
commands.put(Set.of("version"), new VersionCommand());
commands.put(Set.of("dumpplugins"), new DumpPluginsCommand());
+ commands.put(Set.of("fixlight"), new FixLightCommand());
return commands.entrySet().stream()
.flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue())))
diff --git a/src/main/java/io/papermc/paper/command/subcommands/FixLightCommand.java b/src/main/java/io/papermc/paper/command/subcommands/FixLightCommand.java
new file mode 100644
index 0000000000000000000000000000000000000000..7784d72ddd6db00c674e22759c00c430222c4b85
--- /dev/null
+++ b/src/main/java/io/papermc/paper/command/subcommands/FixLightCommand.java
@@ -0,0 +1,115 @@
+package io.papermc.paper.command.subcommands;
+
+import io.papermc.paper.command.PaperSubcommand;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import io.papermc.paper.util.MCUtil;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ChunkHolder;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.server.level.ThreadedLevelLightEngine;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.LevelChunk;
+import org.bukkit.command.CommandSender;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+import static net.kyori.adventure.text.Component.text;
+import static net.kyori.adventure.text.format.NamedTextColor.BLUE;
+import static net.kyori.adventure.text.format.NamedTextColor.DARK_AQUA;
+import static net.kyori.adventure.text.format.NamedTextColor.GREEN;
+import static net.kyori.adventure.text.format.NamedTextColor.RED;
+
+@DefaultQualifier(NonNull.class)
+public final class FixLightCommand implements PaperSubcommand {
+ @Override
+ public boolean execute(final CommandSender sender, final String subCommand, final String[] args) {
+ this.doFixLight(sender, args);
+ return true;
+ }
+
+ private void doFixLight(final CommandSender sender, final String[] args) {
+ if (!(sender instanceof Player)) {
+ sender.sendMessage(text("Only players can use this command", RED));
+ return;
+ }
+ @Nullable Runnable post = null;
+ int radius = 2;
+ if (args.length > 0) {
+ try {
+ final int parsed = Integer.parseInt(args[0]);
+ if (parsed < 0) {
+ sender.sendMessage(text("Radius cannot be negative!", RED));
+ return;
+ }
+ final int maxRadius = 32;
+ radius = Math.min(maxRadius, parsed);
+ if (radius != parsed) {
+ post = () -> sender.sendMessage(text("Radius '" + parsed + "' was not in the required range [0, " + maxRadius + "], it was lowered to the maximum (" + maxRadius + " chunks).", RED));
+ }
+ } catch (final Exception e) {
+ sender.sendMessage(text("'" + args[0] + "' is not a valid number.", RED));
+ return;
+ }
+ }
+
+ CraftPlayer player = (CraftPlayer) sender;
+ ServerPlayer handle = player.getHandle();
+ ServerLevel world = (ServerLevel) handle.level;
+ ThreadedLevelLightEngine lightengine = world.getChunkSource().getLightEngine();
+ this.starlightFixLight(handle, world, lightengine, radius, post);
+ }
+
+ private void starlightFixLight(
+ final ServerPlayer sender,
+ final ServerLevel world,
+ final ThreadedLevelLightEngine lightengine,
+ final int radius,
+ final @Nullable Runnable done
+ ) {
+ final long start = System.nanoTime();
+ final java.util.LinkedHashSet<ChunkPos> chunks = new java.util.LinkedHashSet<>(MCUtil.getSpiralOutChunks(sender.blockPosition(), radius)); // getChunkCoordinates is actually just bad mappings, this function rets position as blockpos
+
+ final int[] pending = new int[1];
+ for (java.util.Iterator<ChunkPos> iterator = chunks.iterator(); iterator.hasNext(); ) {
+ final ChunkPos chunkPos = iterator.next();
+
+ final @Nullable ChunkAccess chunk = (ChunkAccess) world.getChunkSource().getChunkForLighting(chunkPos.x, chunkPos.z);
+ if (chunk == null || !chunk.isLightCorrect() || !chunk.getStatus().isOrAfter(net.minecraft.world.level.chunk.ChunkStatus.LIGHT)) {
+ // cannot relight this chunk
+ iterator.remove();
+ continue;
+ }
+
+ ++pending[0];
+ }
+
+ final int[] relitChunks = new int[1];
+ lightengine.relight(chunks,
+ (final ChunkPos chunkPos) -> {
+ ++relitChunks[0];
+ sender.getBukkitEntity().sendMessage(text().color(DARK_AQUA).append(
+ text("Relit chunk ", BLUE), text(chunkPos.toString()),
+ text(", progress: ", BLUE), text((int) (Math.round(100.0 * (double) (relitChunks[0]) / (double) pending[0])) + "%")
+ ));
+ },
+ (final int totalRelit) -> {
+ final long end = System.nanoTime();
+ final long diff = Math.round(1.0e-6 * (end - start));
+ sender.getBukkitEntity().sendMessage(text().color(DARK_AQUA).append(
+ text("Relit ", BLUE), text(totalRelit),
+ text(" chunks. Took ", BLUE), text(diff + "ms")
+ ));
+ if (done != null) {
+ done.run();
+ }
+ }
+ );
+ sender.getBukkitEntity().sendMessage(text().color(BLUE).append(text("Relighting "), text(pending[0], DARK_AQUA), text(" chunks")));
+ }
+}
diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java
index 941ca1b44c7cac656bdd76c7095887b1c3570aec..30e330cc3a2f51e4ec9555671e3eeb7bb14bdfa3 100644
--- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
@@ -55,7 +55,7 @@ public class ChunkHolder {
private volatile CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> fullChunkFuture; private int fullChunkCreateCount; private volatile boolean isFullChunkReady; // Paper - cache chunk ticking stage
private volatile CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> tickingChunkFuture; private volatile boolean isTickingReady; // Paper - cache chunk ticking stage
private volatile CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> entityTickingChunkFuture; private volatile boolean isEntityTickingReady; // Paper - cache chunk ticking stage
- private CompletableFuture<ChunkAccess> chunkToSave;
+ public CompletableFuture<ChunkAccess> chunkToSave; // Paper - public
@Nullable
private final DebugBuffer<ChunkHolder.ChunkSaveDebug> chunkToSaveHistory;
public int oldTicketLevel;
diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index 091c9e9bdbe4e956386df011ddf01cba42c30da1..578849f64de38dc75cdefeb243422c4c89a5c69c 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -134,7 +134,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
private final LongSet entitiesInLevel;
public final ServerLevel level;
private final ThreadedLevelLightEngine lightEngine;
- private final BlockableEventLoop<Runnable> mainThreadExecutor;
+ public final BlockableEventLoop<Runnable> mainThreadExecutor; // Paper - public
public ChunkGenerator generator;
private final RandomState randomState;
private final ChunkGeneratorStructureState chunkGeneratorState;
diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java
index fbe62a31ab199d83a1db0a4e0b1a813824e6f2c2..d38ad1b1eee92a6dbd2b79b4fcdb8959cdb4007d 100644
--- a/src/main/java/net/minecraft/server/level/DistanceManager.java
+++ b/src/main/java/net/minecraft/server/level/DistanceManager.java
@@ -390,7 +390,7 @@ public abstract class DistanceManager {
}
public void removeTicketsOnClosing() {
- ImmutableSet<TicketType<?>> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT); // Paper - add additional tickets to preserve
+ ImmutableSet<TicketType<?>> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT, TicketType.CHUNK_RELIGHT, ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET); // Paper - add additional tickets to preserve
ObjectIterator objectiterator = this.tickets.long2ObjectEntrySet().fastIterator();
while (objectiterator.hasNext()) {
diff --git a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
index 5b238e41ffa3e374b52ee955cb39087571c6ffc2..275b7f7dd36a2073a3eb9f89f4c832839e5aa9af 100644
--- a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
+++ b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java
@@ -23,6 +23,17 @@ import net.minecraft.world.level.chunk.LightChunkGetter;
import net.minecraft.world.level.lighting.LevelLightEngine;
import org.slf4j.Logger;
+// Paper start
+import ca.spottedleaf.starlight.common.light.StarLightEngine;
+import io.papermc.paper.util.CoordinateUtils;
+import java.util.function.Supplier;
+import net.minecraft.world.level.lighting.LayerLightEventListener;
+import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap;
+import it.unimi.dsi.fastutil.longs.LongArrayList;
+import it.unimi.dsi.fastutil.longs.LongIterator;
+import net.minecraft.world.level.chunk.ChunkStatus;
+// Paper end
+
public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCloseable {
private static final Logger LOGGER = LogUtils.getLogger();
private final ProcessorMailbox<Runnable> taskMailbox;
@@ -32,13 +43,154 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
private volatile int taskPerBatch = 5;
private final AtomicBoolean scheduled = new AtomicBoolean();
+ // Paper start - replace light engine impl
+ protected final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine;
+ public final boolean hasBlockLight;
+ public final boolean hasSkyLight;
+ // Paper end - replace light engine impl
+
public ThreadedLevelLightEngine(LightChunkGetter chunkProvider, ChunkMap chunkStorage, boolean hasBlockLight, ProcessorMailbox<Runnable> processor, ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> executor) {
- super(chunkProvider, true, hasBlockLight);
+ super(chunkProvider, false, false); // Paper - destroy vanilla light engine state
this.chunkMap = chunkStorage;
this.sorterMailbox = executor;
this.taskMailbox = processor;
+ // Paper start - replace light engine impl
+ this.hasBlockLight = true;
+ this.hasSkyLight = hasBlockLight; // Nice variable name.
+ this.theLightEngine = new ca.spottedleaf.starlight.common.light.StarLightInterface(chunkProvider, this.hasSkyLight, this.hasBlockLight, this);
+ // Paper end - replace light engine impl
+ }
+
+ // Paper start - replace light engine impl
+ protected final ChunkAccess getChunk(final int chunkX, final int chunkZ) {
+ return ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().getChunkAtImmediately(chunkX, chunkZ);
}
+ protected long relightCounter;
+
+ public int relight(java.util.Set<ChunkPos> chunks_param,
+ java.util.function.Consumer<ChunkPos> chunkLightCallback,
+ java.util.function.IntConsumer onComplete) {
+ if (!org.bukkit.Bukkit.isPrimaryThread()) {
+ throw new IllegalStateException("Must only be called on the main thread");
+ }
+
+ java.util.Set<ChunkPos> chunks = new java.util.LinkedHashSet<>(chunks_param);
+ // add tickets
+ java.util.Map<ChunkPos, Long> ticketIds = new java.util.HashMap<>();
+ int totalChunks = 0;
+ for (java.util.Iterator<ChunkPos> iterator = chunks.iterator(); iterator.hasNext();) {
+ final ChunkPos chunkPos = iterator.next();
+
+ final ChunkAccess chunk = (ChunkAccess)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().getChunkForLighting(chunkPos.x, chunkPos.z);
+ if (chunk == null || !chunk.isLightCorrect() || !chunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) {
+ // cannot relight this chunk
+ iterator.remove();
+ continue;
+ }
+
+ final Long id = Long.valueOf(this.relightCounter++);
+
+ ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().addTicketAtLevel(TicketType.CHUNK_RELIGHT, chunkPos, io.papermc.paper.util.MCUtil.getTicketLevelFor(ChunkStatus.LIGHT), id);
+ ticketIds.put(chunkPos, id);
+
+ ++totalChunks;
+ }
+
+ this.taskMailbox.tell(() -> {
+ this.theLightEngine.relightChunks(chunks, (ChunkPos chunkPos) -> {
+ chunkLightCallback.accept(chunkPos);
+ ((java.util.concurrent.Executor)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(() -> {
+ ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().chunkMap.getUpdatingChunkIfPresent(chunkPos.toLong()).broadcast(new net.minecraft.network.protocol.game.ClientboundLightUpdatePacket(chunkPos, ThreadedLevelLightEngine.this, null, null, true), false);
+ ((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().removeTicketAtLevel(TicketType.CHUNK_RELIGHT, chunkPos, io.papermc.paper.util.MCUtil.getTicketLevelFor(ChunkStatus.LIGHT), ticketIds.get(chunkPos));
+ });
+ }, onComplete);
+ });
+ this.tryScheduleUpdate();
+
+ return totalChunks;
+ }
+
+ private final Long2IntOpenHashMap chunksBeingWorkedOn = new Long2IntOpenHashMap();
+
+ private void queueTaskForSection(final int chunkX, final int chunkY, final int chunkZ, final Supplier<CompletableFuture<Void>> runnable) {
+ final ServerLevel world = (ServerLevel)this.theLightEngine.getWorld();
+
+ final ChunkAccess center = this.theLightEngine.getAnyChunkNow(chunkX, chunkZ);
+ if (center == null || !center.getStatus().isOrAfter(ChunkStatus.LIGHT)) {
+ // do not accept updates in unlit chunks, unless we might be generating a chunk. thanks to the amazing
+ // chunk scheduling, we could be lighting and generating a chunk at the same time
+ return;
+ }
+
+ if (center.getStatus() != ChunkStatus.FULL) {
+ // do not keep chunk loaded, we are probably in a gen thread
+ // if we proceed to add a ticket the chunk will be loaded, which is not what we want (avoid cascading gen)
+ runnable.get();
+ return;
+ }
+
+ if (!world.getChunkSource().chunkMap.mainThreadExecutor.isSameThread()) {
+ // ticket logic is not safe to run off-main, re-schedule
+ world.getChunkSource().chunkMap.mainThreadExecutor.execute(() -> {
+ this.queueTaskForSection(chunkX, chunkY, chunkZ, runnable);
+ });
+ return;
+ }
+
+ final long key = CoordinateUtils.getChunkKey(chunkX, chunkZ);
+
+ final CompletableFuture<Void> updateFuture = runnable.get();
+
+ if (updateFuture == null) {
+ // not scheduled
+ return;
+ }
+
+ final int references = this.chunksBeingWorkedOn.addTo(key, 1);
+ if (references == 0) {
+ final ChunkPos pos = new ChunkPos(chunkX, chunkZ);
+ world.getChunkSource().addRegionTicket(ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET, pos, 0, pos);
+ }
+
+ updateFuture.thenAcceptAsync((final Void ignore) -> {
+ final int newReferences = this.chunksBeingWorkedOn.get(key);
+ if (newReferences == 1) {
+ this.chunksBeingWorkedOn.remove(key);
+ final ChunkPos pos = new ChunkPos(chunkX, chunkZ);
+ world.getChunkSource().removeRegionTicket(ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET, pos, 0, pos);
+ } else {
+ this.chunksBeingWorkedOn.put(key, newReferences - 1);
+ }
+ }, world.getChunkSource().chunkMap.mainThreadExecutor).whenComplete((final Void ignore, final Throwable thr) -> {
+ if (thr != null) {
+ LOGGER.error("Failed to remove ticket level for post chunk task " + new ChunkPos(chunkX, chunkZ), thr);
+ }
+ });
+ }
+
+ @Override
+ public boolean hasLightWork() {
+ // route to new light engine
+ return this.theLightEngine.hasUpdates();
+ }
+
+ @Override
+ public LayerLightEventListener getLayerListener(final LightLayer lightType) {
+ return lightType == LightLayer.BLOCK ? this.theLightEngine.getBlockReader() : this.theLightEngine.getSkyReader();
+ }
+
+ @Override
+ public int getRawBrightness(final BlockPos pos, final int ambientDarkness) {
+ // need to use new light hooks for this
+ final int sky = this.theLightEngine.getSkyReader().getLightValue(pos) - ambientDarkness;
+ // Don't fetch the block light level if the skylight level is 15, since the value will never be higher.
+ if (sky == 15) return 15;
+ final int block = this.theLightEngine.getBlockReader().getLightValue(pos);
+ return Math.max(sky, block);
+ }
+ // Paper end - replace light engine imp
+
@Override
public void close() {
}
@@ -55,15 +207,16 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
@Override
public void checkBlock(BlockPos pos) {
- BlockPos blockPos = pos.immutable();
- this.addTask(SectionPos.blockToSectionCoord(pos.getX()), SectionPos.blockToSectionCoord(pos.getZ()), ThreadedLevelLightEngine.TaskType.POST_UPDATE, Util.name(() -> {
- super.checkBlock(blockPos);
- }, () -> {
- return "checkBlock " + blockPos;
- }));
+ // Paper start - replace light engine impl
+ final BlockPos posCopy = pos.immutable();
+ this.queueTaskForSection(posCopy.getX() >> 4, posCopy.getY() >> 4, posCopy.getZ() >> 4, () -> {
+ return this.theLightEngine.blockChange(posCopy);
+ });
+ // Paper end - replace light engine impl
}
protected void updateChunkStatus(ChunkPos pos) {
+ if (true) return; // Paper - replace light engine impl
this.addTask(pos.x, pos.z, () -> {
return 0;
}, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
@@ -86,17 +239,16 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
@Override
public void updateSectionStatus(SectionPos pos, boolean notReady) {
- this.addTask(pos.x(), pos.z(), () -> {
- return 0;
- }, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
- super.updateSectionStatus(pos, notReady);
- }, () -> {
- return "updateSectionStatus " + pos + " " + notReady;
- }));
+ // Paper start - replace light engine impl
+ this.queueTaskForSection(pos.getX(), pos.getY(), pos.getZ(), () -> {
+ return this.theLightEngine.sectionChange(pos, notReady);
+ });
+ // Paper end - replace light engine impl
}
@Override
public void enableLightSources(ChunkPos pos, boolean retainData) {
+ if (true) return; // Paper - replace light engine impl
this.addTask(pos.x, pos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
super.enableLightSources(pos, retainData);
}, () -> {
@@ -106,6 +258,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
@Override
public void queueSectionData(LightLayer lightType, SectionPos pos, @Nullable DataLayer nibbles, boolean nonEdge) {
+ if (true) return; // Paper - replace light engine impl
this.addTask(pos.x(), pos.z(), () -> {
return 0;
}, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
@@ -131,6 +284,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
@Override
public void retainData(ChunkPos pos, boolean retainData) {
+ if (true) return; // Paper - replace light engine impl
this.addTask(pos.x, pos.z, () -> {
return 0;
}, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
@@ -153,6 +307,37 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
}
public CompletableFuture<ChunkAccess> lightChunk(ChunkAccess chunk, boolean excludeBlocks) {
+ // Paper start - replace light engine impl
+ if (true) {
+ boolean lit = excludeBlocks;
+ final ChunkPos chunkPos = chunk.getPos();
+
+ return CompletableFuture.supplyAsync(() -> {
+ final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(chunk);
+ if (!lit) {
+ chunk.setLightCorrect(false);
+ this.theLightEngine.lightChunk(chunk, emptySections);
+ chunk.setLightCorrect(true);
+ } else {
+ this.theLightEngine.forceLoadInChunk(chunk, emptySections);
+ // can't really force the chunk to be edged checked, as we need neighbouring chunks - but we don't have
+ // them, so if it's not loaded then i guess we can't do edge checks. later loads of the chunk should
+ // catch what we miss here.
+ this.theLightEngine.checkChunkEdges(chunkPos.x, chunkPos.z);
+ }
+
+ this.chunkMap.releaseLightTicket(chunkPos);
+ return chunk;
+ }, (runnable) -> {
+ this.theLightEngine.scheduleChunkLight(chunkPos, runnable);
+ this.tryScheduleUpdate();
+ }).whenComplete((final ChunkAccess c, final Throwable throwable) -> {
+ if (throwable != null) {
+ LOGGER.error("Failed to light chunk " + chunkPos, throwable);
+ }
+ });
+ }
+ // Paper end - replace light engine impl
ChunkPos chunkPos = chunk.getPos();
chunk.setLightCorrect(false);
this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> {
@@ -187,7 +372,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
}
public void tryScheduleUpdate() {
- if ((!this.lightTasks.isEmpty() || super.hasLightWork()) && this.scheduled.compareAndSet(false, true)) {
+ if (this.hasLightWork() && this.scheduled.compareAndSet(false, true)) { // Paper // Paper - rewrite light engine
this.taskMailbox.tell(() -> {
this.runUpdate();
this.scheduled.set(false);
@@ -209,7 +394,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl
}
objectListIterator.back(j);
- super.runUpdates(Integer.MAX_VALUE, true, true);
+ this.theLightEngine.propagateChanges(); // Paper - rewrite light engine
for(int var5 = 0; objectListIterator.hasNext() && var5 < i; ++var5) {
Pair<ThreadedLevelLightEngine.TaskType, Runnable> pair2 = objectListIterator.next();
diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java
index 0d536d72ac918fbd403397ff369d10143ee9c204..6051e5f272838ef23276a90e21c2fc821ca155d1 100644
--- a/src/main/java/net/minecraft/server/level/TicketType.java
+++ b/src/main/java/net/minecraft/server/level/TicketType.java
@@ -26,6 +26,7 @@ public class TicketType<T> {
public static final TicketType<ChunkPos> UNKNOWN = TicketType.create("unknown", Comparator.comparingLong(ChunkPos::toLong), 1);
public static final TicketType<Unit> PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit
public static final TicketType<org.bukkit.plugin.Plugin> PLUGIN_TICKET = TicketType.create("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // CraftBukkit
+ public static final TicketType<Long> CHUNK_RELIGHT = create("light_update", Long::compareTo); // Paper - ensure chunks stay loaded for lighting
public static <T> TicketType<T> create(String name, Comparator<T> argumentComparator) {
return new TicketType<>(name, argumentComparator, 0L);
diff --git a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
index 2cb3463f3d77a32ada67a6251707d741d18910ca..0eb877c80c6492d03681c70f7866ad705a62454e 100644
--- a/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
+++ b/src/main/java/net/minecraft/world/level/block/state/BlockBehaviour.java
@@ -751,6 +751,7 @@ public abstract class BlockBehaviour implements FeatureElement {
this.emissiveRendering = blockbase_info.emissiveRendering;
this.offsetFunction = blockbase_info.offsetFunction;
this.spawnParticlesOnBreak = blockbase_info.spawnParticlesOnBreak;
+ this.conditionallyFullOpaque = this.isOpaque() & this.isTransparentOnSomeFaces(); // Paper
}
// Paper start
@@ -759,6 +760,18 @@ public abstract class BlockBehaviour implements FeatureElement {
return this.shapeExceedsCube;
}
// Paper end
+ // Paper start - starlight
+ protected int opacityIfCached = -1;
+ // ret -1 if opacity is dynamic, or -1 if the block is conditionally full opaque, else return opacity in [0, 15]
+ public final int getOpacityIfCached() {
+ return this.opacityIfCached;
+ }
+
+ protected final boolean conditionallyFullOpaque;
+ public final boolean isConditionallyFullOpaque() {
+ return this.conditionallyFullOpaque;
+ }
+ // Paper end - starlight
public void initCache() {
this.fluidState = ((Block) this.owner).getFluidState(this.asState());
@@ -767,6 +780,7 @@ public abstract class BlockBehaviour implements FeatureElement {
this.cache = new BlockBehaviour.BlockStateBase.Cache(this.asState());
}
this.shapeExceedsCube = this.cache == null || this.cache.largeCollisionShape; // Paper - moved from actual method to here
+ this.opacityIfCached = this.cache == null || this.isConditionallyFullOpaque() ? -1 : this.cache.lightBlock; // Paper - starlight - cache opacity for light
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
index 3fdbb777d4722596cc4df79b2d4d7b9c553580fd..1b7496cec0ba5a95615a069e3168bd46308d0b40 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkAccess.java
@@ -81,6 +81,47 @@ public abstract class ChunkAccess implements BlockGetter, BiomeManager.NoiseBiom
private static final org.bukkit.craftbukkit.persistence.CraftPersistentDataTypeRegistry DATA_TYPE_REGISTRY = new org.bukkit.craftbukkit.persistence.CraftPersistentDataTypeRegistry();
public org.bukkit.craftbukkit.persistence.DirtyCraftPersistentDataContainer persistentDataContainer = new org.bukkit.craftbukkit.persistence.DirtyCraftPersistentDataContainer(ChunkAccess.DATA_TYPE_REGISTRY);
// CraftBukkit end
+ // Paper start - rewrite light engine
+ private volatile ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] blockNibbles;
+
+ private volatile ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] skyNibbles;
+
+ private volatile boolean[] skyEmptinessMap;
+
+ private volatile boolean[] blockEmptinessMap;
+
+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getBlockNibbles() {
+ return this.blockNibbles;
+ }
+
+ public void setBlockNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {
+ this.blockNibbles = nibbles;
+ }
+
+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getSkyNibbles() {
+ return this.skyNibbles;
+ }
+
+ public void setSkyNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {
+ this.skyNibbles = nibbles;
+ }
+
+ public boolean[] getSkyEmptinessMap() {
+ return this.skyEmptinessMap;
+ }
+
+ public void setSkyEmptinessMap(final boolean[] emptinessMap) {
+ this.skyEmptinessMap = emptinessMap;
+ }
+
+ public boolean[] getBlockEmptinessMap() {
+ return this.blockEmptinessMap;
+ }
+
+ public void setBlockEmptinessMap(final boolean[] emptinessMap) {
+ this.blockEmptinessMap = emptinessMap;
+ }
+ // Paper end - rewrite light engine
public ChunkAccess(ChunkPos pos, UpgradeData upgradeData, LevelHeightAccessor heightLimitView, Registry<Biome> biome, long inhabitedTime, @Nullable LevelChunkSection[] sectionArrayInitializer, @Nullable BlendingData blendingData) {
this.locX = pos.x; this.locZ = pos.z; // Paper - reduce need for field lookups
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java b/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java
index f4aab0bf544ef5c889c02e41389b1656cf1e4932..e2278ed457a7342d0d1b1a5fc1b5bdef6358816b 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkStatus.java
@@ -293,6 +293,17 @@ public class ChunkStatus {
return this.chunkType;
}
+ // Paper start
+ public static ChunkStatus getStatus(String name) {
+ try {
+ // We need this otherwise we return EMPTY for invalid names
+ ResourceLocation key = new ResourceLocation(name);
+ return BuiltInRegistries.CHUNK_STATUS.getOptional(key).orElse(null);
+ } catch (Exception ex) {
+ return null; // invalid name
+ }
+ }
+ // Paper end
public static ChunkStatus byName(String id) {
return (ChunkStatus) BuiltInRegistries.CHUNK_STATUS.get(ResourceLocation.tryParse(id));
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java
index 587cc435a58d28e14e88860c8348425101334eda..2eb92dde607d7c8968cb07c6f3c24e1c45e9990f 100644
--- a/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/EmptyLevelChunk.java
@@ -21,6 +21,40 @@ public class EmptyLevelChunk extends LevelChunk {
this.biome = biomeEntry;
}
+ // Paper start - starlight
+ @Override
+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getBlockNibbles() {
+ return ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(this.getLevel());
+ }
+
+ @Override
+ public void setBlockNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {}
+
+ @Override
+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getSkyNibbles() {
+ return ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(this.getLevel());
+ }
+
+ @Override
+ public void setSkyNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {}
+
+ @Override
+ public boolean[] getSkyEmptinessMap() {
+ return null;
+ }
+
+ @Override
+ public void setSkyEmptinessMap(final boolean[] emptinessMap) {}
+
+ @Override
+ public boolean[] getBlockEmptinessMap() {
+ return null;
+ }
+
+ @Override
+ public void setBlockEmptinessMap(final boolean[] emptinessMap) {}
+ // Paper end - starlight
+
@Override
public BlockState getBlockState(BlockPos pos) {
return Blocks.VOID_AIR.defaultBlockState();
diff --git a/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java b/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java
index 80b98e6667f1a0c21d019c58a8a0d4cc5b0f48e1..8033c8741a0f73919a357893652592b317bfb417 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ImposterProtoChunk.java
@@ -31,6 +31,48 @@ public class ImposterProtoChunk extends ProtoChunk {
private final LevelChunk wrapped;
private final boolean allowWrites;
+ // Paper start - rewrite light engine
+ @Override
+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getBlockNibbles() {
+ return this.wrapped.getBlockNibbles();
+ }
+
+ @Override
+ public void setBlockNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {
+ this.wrapped.setBlockNibbles(nibbles);
+ }
+
+ @Override
+ public ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] getSkyNibbles() {
+ return this.wrapped.getSkyNibbles();
+ }
+
+ @Override
+ public void setSkyNibbles(final ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] nibbles) {
+ this.wrapped.setSkyNibbles(nibbles);
+ }
+
+ @Override
+ public boolean[] getSkyEmptinessMap() {
+ return this.wrapped.getSkyEmptinessMap();
+ }
+
+ @Override
+ public void setSkyEmptinessMap(final boolean[] emptinessMap) {
+ this.wrapped.setSkyEmptinessMap(emptinessMap);
+ }
+
+ @Override
+ public boolean[] getBlockEmptinessMap() {
+ return this.wrapped.getBlockEmptinessMap();
+ }
+
+ @Override
+ public void setBlockEmptinessMap(final boolean[] emptinessMap) {
+ this.wrapped.setBlockEmptinessMap(emptinessMap);
+ }
+ // Paper end - rewrite light engine
+
public ImposterProtoChunk(LevelChunk wrapped, boolean bl) {
super(wrapped.getPos(), UpgradeData.EMPTY, wrapped.levelHeightAccessor, wrapped.getLevel().registryAccess().registryOrThrow(Registries.BIOME), wrapped.getBlendingData());
this.wrapped = wrapped;
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
index 8e11ca5e8cc43a27482a1794d843359d7428bdde..2753e2a1991ec39f03c2a81f3262f94f0e3fe9a7 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -93,6 +93,10 @@ public class LevelChunk extends ChunkAccess {
public LevelChunk(Level world, ChunkPos pos, UpgradeData upgradeData, LevelChunkTicks<Block> blockTickScheduler, LevelChunkTicks<Fluid> fluidTickScheduler, long inhabitedTime, @Nullable LevelChunkSection[] sectionArrayInitializer, @Nullable LevelChunk.PostLoadProcessor entityLoader, @Nullable BlendingData blendingData) {
super(pos, upgradeData, world, world.registryAccess().registryOrThrow(Registries.BIOME), inhabitedTime, sectionArrayInitializer, blendingData);
+ // Paper start - rewrite light engine
+ this.setBlockNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world));
+ this.setSkyNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world));
+ // Paper end - rewrite light engine
this.tickersInLevel = Maps.newHashMap();
this.clientLightReady = false;
this.level = (ServerLevel) world; // CraftBukkit - type
@@ -230,6 +234,12 @@ public class LevelChunk extends ChunkAccess {
public LevelChunk(ServerLevel world, ProtoChunk protoChunk, @Nullable LevelChunk.PostLoadProcessor entityLoader) {
this(world, protoChunk.getPos(), protoChunk.getUpgradeData(), protoChunk.unpackBlockTicks(), protoChunk.unpackFluidTicks(), protoChunk.getInhabitedTime(), protoChunk.getSections(), entityLoader, protoChunk.getBlendingData());
+ // Paper start - rewrite light engine
+ this.setBlockNibbles(protoChunk.getBlockNibbles());
+ this.setSkyNibbles(protoChunk.getSkyNibbles());
+ this.setSkyEmptinessMap(protoChunk.getSkyEmptinessMap());
+ this.setBlockEmptinessMap(protoChunk.getBlockEmptinessMap());
+ // Paper end - rewrite light engine
Iterator iterator = protoChunk.getBlockEntities().values().iterator();
while (iterator.hasNext()) {
diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
index afba733824d84d650e669eda028bf4d28cf006b4..cd82985b0aa821dccc0484f328407381d58ec81f 100644
--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
@@ -142,7 +142,7 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
return this.get(this.strategy.getIndex(x, y, z));
}
- protected T get(int index) {
+ public T get(int index) { // Paper - public
PalettedContainer.Data<T> data = this.data;
return data.palette.valueFor(data.storage.get(index));
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java
index 92a64c49b1c7227a5b34488ea15d3d8adb0f9c80..0b67858f8d6689b34816f9556f3424af512a7401 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ProtoChunk.java
@@ -55,6 +55,12 @@ public class ProtoChunk extends ChunkAccess {
public ProtoChunk(ChunkPos pos, UpgradeData upgradeData, @Nullable LevelChunkSection[] sections, ProtoChunkTicks<Block> blockTickScheduler, ProtoChunkTicks<Fluid> fluidTickScheduler, LevelHeightAccessor world, Registry<Biome> biomeRegistry, @Nullable BlendingData blendingData) {
super(pos, upgradeData, world, biomeRegistry, 0L, sections, blendingData);
+ // Paper start - rewrite light engine
+ if (!(this instanceof ImposterProtoChunk)) {
+ this.setBlockNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world));
+ this.setSkyNibbles(ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world));
+ }
+ // Paper end - rewrite light engine
this.blockTicks = blockTickScheduler;
this.fluidTicks = fluidTickScheduler;
}
diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
index aa4f2dc63dd79e6c3d7594d2fd63fa0091df5f53..bca8084f7e76d036378705aa802217cc1bfdbc7d 100644
--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
@@ -84,6 +84,14 @@ public class ChunkSerializer {
public static final String BLOCK_LIGHT_TAG = "BlockLight";
public static final String SKY_LIGHT_TAG = "SkyLight";
+ // Paper start - replace light engine impl
+ private static final int STARLIGHT_LIGHT_VERSION = 8;
+
+ private static final String BLOCKLIGHT_STATE_TAG = "starlight.blocklight_state";
+ private static final String SKYLIGHT_STATE_TAG = "starlight.skylight_state";
+ private static final String STARLIGHT_VERSION_TAG = "starlight.light_version";
+ // Paper end - replace light engine impl
+
public ChunkSerializer() {}
public static ProtoChunk read(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt) {
@@ -94,13 +102,20 @@ public class ChunkSerializer {
}
UpgradeData chunkconverter = nbt.contains("UpgradeData", 10) ? new UpgradeData(nbt.getCompound("UpgradeData"), world) : UpgradeData.EMPTY;
- boolean flag = nbt.getBoolean("isLightOn");
+ boolean flag = getStatus(nbt) != null && getStatus(nbt).isOrAfter(ChunkStatus.LIGHT) && nbt.get("isLightOn") != null && nbt.getInt(STARLIGHT_VERSION_TAG) == STARLIGHT_LIGHT_VERSION; // Paper
ListTag nbttaglist = nbt.getList("sections", 10);
int i = world.getSectionsCount();
LevelChunkSection[] achunksection = new LevelChunkSection[i];
boolean flag1 = world.dimensionType().hasSkyLight();
ServerChunkCache chunkproviderserver = world.getChunkSource();
LevelLightEngine lightengine = chunkproviderserver.getLightEngine();
+ // Paper start
+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] blockNibbles = ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world);
+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] skyNibbles = ca.spottedleaf.starlight.common.light.StarLightEngine.getFilledEmptyLight(world);
+ final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world);
+ final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world);
+ boolean canReadSky = world.dimensionType().hasSkyLight();
+ // Paper end
Registry<Biome> iregistry = world.registryAccess().registryOrThrow(Registries.BIOME);
Codec<PalettedContainer<Holder<Biome>>> codec = ChunkSerializer.makeBiomeCodecRW(iregistry); // CraftBukkit - read/write
boolean flag2 = false;
@@ -108,7 +123,7 @@ public class ChunkSerializer {
DataResult dataresult;
for (int j = 0; j < nbttaglist.size(); ++j) {
- CompoundTag nbttagcompound1 = nbttaglist.getCompound(j);
+ CompoundTag nbttagcompound1 = nbttaglist.getCompound(j); CompoundTag sectionData = nbttagcompound1; // Paper
byte b0 = nbttagcompound1.getByte("Y");
int k = world.getSectionIndexFromSectionY(b0);
@@ -149,19 +164,39 @@ public class ChunkSerializer {
boolean flag3 = nbttagcompound1.contains("BlockLight", 7);
boolean flag4 = flag1 && nbttagcompound1.contains("SkyLight", 7);
- if (flag3 || flag4) {
- if (!flag2) {
- lightengine.retainData(chunkPos, true);
- flag2 = true;
- }
-
+ // Paper start - rewrite the light engine
+ if (flag) {
+ try {
+ int y = sectionData.getByte("Y");
+ // Paper end - rewrite the light engine
if (flag3) {
- lightengine.queueSectionData(LightLayer.BLOCK, SectionPos.of(chunkPos, b0), new DataLayer(nbttagcompound1.getByteArray("BlockLight")), true);
+ // Paper start - rewrite the light engine
+ // this is where our diff is
+ blockNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(sectionData.getByteArray("BlockLight").clone(), sectionData.getInt(BLOCKLIGHT_STATE_TAG)); // clone for data safety
+ } else {
+ blockNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(null, sectionData.getInt(BLOCKLIGHT_STATE_TAG));
+ // Paper end - rewrite the light engine
}
if (flag4) {
- lightengine.queueSectionData(LightLayer.SKY, SectionPos.of(chunkPos, b0), new DataLayer(nbttagcompound1.getByteArray("SkyLight")), true);
+ // Paper start - rewrite the light engine
+ // we store under the same key so mod programs editing nbt
+ // can still read the data, hopefully.
+ // however, for compatibility we store chunks as unlit so vanilla
+ // is forced to re-light them if it encounters our data. It's too much of a burden
+ // to try and maintain compatibility with a broken and inferior skylight management system.
+ skyNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(sectionData.getByteArray("SkyLight").clone(), sectionData.getInt(SKYLIGHT_STATE_TAG)); // clone for data safety
+ } else if (flag1) {
+ skyNibbles[y - minSection] = new ca.spottedleaf.starlight.common.light.SWMRNibbleArray(null, sectionData.getInt(SKYLIGHT_STATE_TAG));
+ // Paper end - rewrite the light engine
+ }
+
+ // Paper start - rewrite the light engine
+ } catch (Exception ex) {
+ LOGGER.warn("Failed to load light data for chunk " + chunkPos + " in world '" + world.getWorld().getName() + "', light will be regenerated", ex);
+ flag = false;
}
+ // Paper end - rewrite light engine
}
}
@@ -190,6 +225,8 @@ public class ChunkSerializer {
}, chunkPos);
object1 = new LevelChunk(world.getLevel(), chunkPos, chunkconverter, levelchunkticks, levelchunkticks1, l, achunksection, ChunkSerializer.postLoadChunk(world, nbt), blendingdata);
+ ((LevelChunk)object1).setBlockNibbles(blockNibbles); // Paper - replace light impl
+ ((LevelChunk)object1).setSkyNibbles(skyNibbles); // Paper - replace light impl
} else {
ProtoChunkTicks<Block> protochunkticklist = ProtoChunkTicks.load(nbt.getList("block_ticks", 10), (s) -> {
return BuiltInRegistries.BLOCK.getOptional(ResourceLocation.tryParse(s));
@@ -198,6 +235,8 @@ public class ChunkSerializer {
return BuiltInRegistries.FLUID.getOptional(ResourceLocation.tryParse(s));
}, chunkPos);
ProtoChunk protochunk = new ProtoChunk(chunkPos, chunkconverter, achunksection, protochunkticklist, protochunkticklist1, world, iregistry, blendingdata);
+ protochunk.setBlockNibbles(blockNibbles); // Paper - replace light impl
+ protochunk.setSkyNibbles(skyNibbles); // Paper - replace light impl
object1 = protochunk;
protochunk.setInhabitedTime(l);
@@ -342,6 +381,12 @@ public class ChunkSerializer {
// CraftBukkit end
public static CompoundTag write(ServerLevel world, ChunkAccess chunk) {
+ // Paper start - rewrite light impl
+ final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world);
+ final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world);
+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] blockNibbles = chunk.getBlockNibbles();
+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray[] skyNibbles = chunk.getSkyNibbles();
+ // Paper end - rewrite light impl
ChunkPos chunkcoordintpair = chunk.getPos();
CompoundTag nbttagcompound = NbtUtils.addCurrentDataVersion(new CompoundTag());
@@ -391,11 +436,14 @@ public class ChunkSerializer {
for (int i = lightenginethreaded.getMinLightSection(); i < lightenginethreaded.getMaxLightSection(); ++i) {
int j = chunk.getSectionIndexFromSectionY(i);
boolean flag1 = j >= 0 && j < achunksection.length;
- DataLayer nibblearray = lightenginethreaded.getLayerListener(LightLayer.BLOCK).getDataLayerData(SectionPos.of(chunkcoordintpair, i));
- DataLayer nibblearray1 = lightenginethreaded.getLayerListener(LightLayer.SKY).getDataLayerData(SectionPos.of(chunkcoordintpair, i));
+ // Paper - replace light engine
- if (flag1 || nibblearray != null || nibblearray1 != null) {
- CompoundTag nbttagcompound1 = new CompoundTag();
+ // Paper start - replace light engine
+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray.SaveState blockNibble = blockNibbles[i - minSection].getSaveState();
+ ca.spottedleaf.starlight.common.light.SWMRNibbleArray.SaveState skyNibble = skyNibbles[i - minSection].getSaveState();
+ if (flag1 || blockNibble != null || skyNibble != null) {
+ // Paper end - replace light engine
+ CompoundTag nbttagcompound1 = new CompoundTag(); CompoundTag section = nbttagcompound1; // Paper
if (flag1) {
LevelChunkSection chunksection = achunksection[j];
@@ -410,13 +458,27 @@ public class ChunkSerializer {
nbttagcompound1.put("biomes", (Tag) dataresult1.getOrThrow(false, logger1::error));
}
- if (nibblearray != null && !nibblearray.isEmpty()) {
- nbttagcompound1.putByteArray("BlockLight", nibblearray.getData());
+ // Paper start
+ // we store under the same key so mod programs editing nbt
+ // can still read the data, hopefully.
+ // however, for compatibility we store chunks as unlit so vanilla
+ // is forced to re-light them if it encounters our data. It's too much of a burden
+ // to try and maintain compatibility with a broken and inferior skylight management system.
+
+ if (blockNibble != null) {
+ if (blockNibble.data != null) {
+ section.putByteArray("BlockLight", blockNibble.data);
+ }
+ section.putInt(BLOCKLIGHT_STATE_TAG, blockNibble.state);
}
- if (nibblearray1 != null && !nibblearray1.isEmpty()) {
- nbttagcompound1.putByteArray("SkyLight", nibblearray1.getData());
+ if (skyNibble != null) {
+ if (skyNibble.data != null) {
+ section.putByteArray("SkyLight", skyNibble.data);
+ }
+ section.putInt(SKYLIGHT_STATE_TAG, skyNibble.state);
}
+ // Paper end
if (!nbttagcompound1.isEmpty()) {
nbttagcompound1.putByte("Y", (byte) i);
@@ -427,7 +489,8 @@ public class ChunkSerializer {
nbttagcompound.put("sections", nbttaglist);
if (flag) {
- nbttagcompound.putBoolean("isLightOn", true);
+ nbttagcompound.putInt(STARLIGHT_VERSION_TAG, STARLIGHT_LIGHT_VERSION); // Paper
+ nbttagcompound.putBoolean("isLightOn", false); // Paper - set to false but still store, this allows us to detect --eraseCache (as eraseCache _removes_)
}
ListTag nbttaglist1 = new ListTag();
@@ -502,6 +565,17 @@ public class ChunkSerializer {
}));
}
+ // Paper start
+ public static @Nullable ChunkStatus getStatus(@Nullable CompoundTag compound) {
+ if (compound == null) {
+ return null;
+ }
+
+ // Note: Copied from below
+ return ChunkStatus.getStatus(compound.getString("Status"));
+ }
+ // Paper end
+
public static ChunkStatus.ChunkType getChunkTypeFromTag(@Nullable CompoundTag nbt) {
return nbt != null ? ChunkStatus.byName(nbt.getString("Status")).getChunkType() : ChunkStatus.ChunkType.PROTOCHUNK;
}
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