480 Zeilen
21 KiB
Diff
480 Zeilen
21 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sun, 20 Jun 2021 16:19:26 -0700
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Subject: [PATCH] Optimise random block ticking
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Massive performance improvement for random block ticking.
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The performance increase comes from the fact that the vast
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majority of attempted block ticks (~95% in my testing) fail
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because the randomly selected block is not tickable.
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Now only tickable blocks are targeted, however this means that
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the maximum number of block ticks occurs per chunk. However,
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not all chunks are going to be targeted. The percent chance
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of a chunk being targeted is based on how many tickable blocks
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are in the chunk.
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This means that while block ticks are spread out less, the
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total number of blocks ticked per world tick remains the same.
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Therefore, the chance of a random tickable block being ticked
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remains the same.
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diff --git a/src/main/java/io/papermc/paper/util/math/ThreadUnsafeRandom.java b/src/main/java/io/papermc/paper/util/math/ThreadUnsafeRandom.java
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new file mode 100644
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index 0000000000000000000000000000000000000000..16ca915c33e31b50d33336408b041e401cb9cbfc
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--- /dev/null
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+++ b/src/main/java/io/papermc/paper/util/math/ThreadUnsafeRandom.java
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@@ -0,0 +1,95 @@
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+package io.papermc.paper.util.math;
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+
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+import net.minecraft.util.RandomSource;
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+import net.minecraft.world.level.levelgen.PositionalRandomFactory;
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+
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+import java.util.Random;
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+
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+public final class ThreadUnsafeRandom extends Random implements RandomSource {
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+
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+ // See javadoc and internal comments for java.util.Random where these values come from, how they are used, and the author for them.
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+ private static final long multiplier = 0x5DEECE66DL;
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+ private static final long addend = 0xBL;
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+ private static final long mask = (1L << 48) - 1;
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+
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+ private static long initialScramble(long seed) {
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+ return (seed ^ multiplier) & mask;
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+ }
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+
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+ private long seed;
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+
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+ @Override
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+ public RandomSource fork() {
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+ return new ThreadUnsafeRandom();
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+ }
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+
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+ @Override
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+ public PositionalRandomFactory forkPositional() {
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+ throw new UnsupportedOperationException();
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+ }
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+
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+ @Override
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+ public int nextInt(int origin, int bound) {
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+ return RandomSource.super.nextInt(origin, bound);
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+ }
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+
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+ @Override
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+ public void setSeed(long seed) {
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+ // note: called by Random constructor
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+ this.seed = initialScramble(seed);
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+ }
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+
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+ @Override
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+ protected int next(int bits) {
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+ // avoid the expensive CAS logic used by superclass
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+ return (int) (((this.seed = this.seed * multiplier + addend) & mask) >>> (48 - bits));
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+ }
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+
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+ // Taken from
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+ // https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
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+ // https://github.com/lemire/Code-used-on-Daniel-Lemire-s-blog/blob/master/2016/06/25/fastrange.c
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+ // Original license is public domain
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+ public static int fastRandomBounded(final long randomInteger, final long limit) {
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+ // randomInteger must be [0, pow(2, 32))
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+ // limit must be [0, pow(2, 32))
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+ return (int)((randomInteger * limit) >>> 32);
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+ }
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+
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+ @Override
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+ public int nextInt(int bound) {
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+ // yes this breaks random's spec
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+ // however there's nothing that uses this class that relies on it
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+ return fastRandomBounded(this.next(32) & 0xFFFFFFFFL, bound);
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+ }
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+
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+ // these below are added to fix reobf issues that I don't wanna deal with right now
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+ @Override
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+ public long nextLong() {
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+ return super.nextInt();
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+ }
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+
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+ @Override
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+ public int nextInt() {
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+ return super.nextInt();
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+ }
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+
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+ @Override
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+ public boolean nextBoolean() {
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+ return super.nextBoolean();
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+ }
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+
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+ @Override
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+ public float nextFloat() {
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+ return super.nextFloat();
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+ }
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+
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+ @Override
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+ public double nextDouble() {
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+ return super.nextDouble();
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+ }
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+
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+ @Override
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+ public double nextGaussian() {
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+ return super.nextGaussian();
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+ }
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+}
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diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
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index 6d1489332681d938a1c3db832ab967ba494f3b97..3ef55cb31b8d9a308fab3ac1e463e98a7dce726e 100644
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--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
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+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
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@@ -662,6 +662,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
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entityplayer.stopSleepInBed(false, false);
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});
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}
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+ // Paper start - optimise random block ticking
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+ private final BlockPos.MutableBlockPos chunkTickMutablePosition = new BlockPos.MutableBlockPos();
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+ private final io.papermc.paper.util.math.ThreadUnsafeRandom randomTickRandom = new io.papermc.paper.util.math.ThreadUnsafeRandom();
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+ // Paper end
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public void tickChunk(LevelChunk chunk, int randomTickSpeed) {
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ChunkPos chunkcoordintpair = chunk.getPos();
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@@ -671,10 +675,10 @@ public class ServerLevel extends Level implements WorldGenLevel {
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ProfilerFiller gameprofilerfiller = this.getProfiler();
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gameprofilerfiller.push("thunder");
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- BlockPos blockposition;
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+ final BlockPos.MutableBlockPos blockposition = this.chunkTickMutablePosition; // Paper - use mutable to reduce allocation rate, final to force compile fail on change
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if (!this.paperConfig().environment.disableThunder && flag && this.isThundering() && this.spigotConfig.thunderChance > 0 && this.random.nextInt(this.spigotConfig.thunderChance) == 0) { // Spigot // Paper - disable thunder
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- blockposition = this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15));
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+ blockposition.set(this.findLightningTargetAround(this.getBlockRandomPos(j, 0, k, 15))); // Paper
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if (this.isRainingAt(blockposition)) {
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DifficultyInstance difficultydamagescaler = this.getCurrentDifficultyAt(blockposition);
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boolean flag1 = this.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING) && this.random.nextDouble() < (double) difficultydamagescaler.getEffectiveDifficulty() * this.paperConfig().entities.spawning.skeletonHorseThunderSpawnChance.or(0.01D) && !this.getBlockState(blockposition.below()).is(Blocks.LIGHTNING_ROD); // Paper
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@@ -698,64 +702,75 @@ public class ServerLevel extends Level implements WorldGenLevel {
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gameprofilerfiller.popPush("iceandsnow");
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if (!this.paperConfig().environment.disableIceAndSnow && this.random.nextInt(16) == 0) { // Paper - Disable ice and snow
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- blockposition = this.getHeightmapPos(Heightmap.Types.MOTION_BLOCKING, this.getBlockRandomPos(j, 0, k, 15));
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- BlockPos blockposition1 = blockposition.below();
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+ // Paper start - optimise chunk ticking
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+ this.getRandomBlockPosition(j, 0, k, 15, blockposition);
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+ int normalY = chunk.getHeight(Heightmap.Types.MOTION_BLOCKING, blockposition.getX() & 15, blockposition.getZ() & 15) + 1;
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+ int downY = normalY - 1;
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+ blockposition.setY(normalY);
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+ // Paper end
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Biome biomebase = (Biome) this.getBiome(blockposition).value();
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- if (biomebase.shouldFreeze(this, blockposition1)) {
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- org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this, blockposition1, Blocks.ICE.defaultBlockState(), null); // CraftBukkit
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+ // Paper start - optimise chunk ticking
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+ blockposition.setY(downY);
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+ if (biomebase.shouldFreeze(this, blockposition)) {
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+ org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this, blockposition, Blocks.ICE.defaultBlockState(), null); // CraftBukkit
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+ // Paper end
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}
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if (flag) {
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+ blockposition.setY(normalY); // Paper
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if (biomebase.shouldSnow(this, blockposition)) {
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org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this, blockposition, Blocks.SNOW.defaultBlockState(), null); // CraftBukkit
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}
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+ blockposition.setY(downY); // Paper
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- BlockState iblockdata = this.getBlockState(blockposition1);
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+ BlockState iblockdata = this.getBlockState(blockposition); // Paper
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Biome.Precipitation biomebase_precipitation = biomebase.getPrecipitation();
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- if (biomebase_precipitation == Biome.Precipitation.RAIN && biomebase.coldEnoughToSnow(blockposition1)) {
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+ if (biomebase_precipitation == Biome.Precipitation.RAIN && biomebase.coldEnoughToSnow(blockposition)) { // Paper
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biomebase_precipitation = Biome.Precipitation.SNOW;
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}
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- iblockdata.getBlock().handlePrecipitation(iblockdata, this, blockposition1, biomebase_precipitation);
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+ iblockdata.getBlock().handlePrecipitation(iblockdata, this, blockposition, biomebase_precipitation); // Paper
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}
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}
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- gameprofilerfiller.popPush("tickBlocks");
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+ // Paper start - optimise random block ticking
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+ gameprofilerfiller.popPush("randomTick");
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timings.chunkTicksBlocks.startTiming(); // Paper
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if (randomTickSpeed > 0) {
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- LevelChunkSection[] achunksection = chunk.getSections();
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- int l = achunksection.length;
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-
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- for (int i1 = 0; i1 < l; ++i1) {
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- LevelChunkSection chunksection = achunksection[i1];
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-
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- if (chunksection.isRandomlyTicking()) {
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- int j1 = chunksection.bottomBlockY();
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-
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- for (int k1 = 0; k1 < randomTickSpeed; ++k1) {
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- BlockPos blockposition2 = this.getBlockRandomPos(j, j1, k, 15);
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-
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- gameprofilerfiller.push("randomTick");
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- BlockState iblockdata1 = chunksection.getBlockState(blockposition2.getX() - j, blockposition2.getY() - j1, blockposition2.getZ() - k);
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+ LevelChunkSection[] sections = chunk.getSections();
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+ int minSection = io.papermc.paper.util.WorldUtil.getMinSection(this);
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+ for (int sectionIndex = 0; sectionIndex < sections.length; ++sectionIndex) {
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+ LevelChunkSection section = sections[sectionIndex];
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+ if (section == null || section.tickingList.size() == 0) {
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+ continue;
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+ }
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- if (iblockdata1.isRandomlyTicking()) {
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- iblockdata1.randomTick(this, blockposition2, this.random);
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- }
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+ int yPos = (sectionIndex + minSection) << 4;
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+ for (int a = 0; a < randomTickSpeed; ++a) {
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+ int tickingBlocks = section.tickingList.size();
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+ int index = this.randomTickRandom.nextInt(16 * 16 * 16);
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+ if (index >= tickingBlocks) {
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+ continue;
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+ }
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- FluidState fluid = iblockdata1.getFluidState();
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+ long raw = section.tickingList.getRaw(index);
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+ int location = com.destroystokyo.paper.util.maplist.IBlockDataList.getLocationFromRaw(raw);
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+ int randomX = location & 15;
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+ int randomY = ((location >>> (4 + 4)) & 255) | yPos;
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+ int randomZ = (location >>> 4) & 15;
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- if (fluid.isRandomlyTicking()) {
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- fluid.randomTick(this, blockposition2, this.random);
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- }
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+ BlockPos blockposition2 = blockposition.set(j + randomX, randomY, k + randomZ);
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+ BlockState iblockdata = com.destroystokyo.paper.util.maplist.IBlockDataList.getBlockDataFromRaw(raw);
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- gameprofilerfiller.pop();
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- }
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+ iblockdata.randomTick(this, blockposition2, this.randomTickRandom);
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+ // We drop the fluid tick since LAVA is ALREADY TICKED by the above method (See LiquidBlock).
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+ // TODO CHECK ON UPDATE
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}
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}
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}
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-
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+ // Paper end - optimise random block ticking
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timings.chunkTicksBlocks.stopTiming(); // Paper
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gameprofilerfiller.pop();
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}
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diff --git a/src/main/java/net/minecraft/util/BitStorage.java b/src/main/java/net/minecraft/util/BitStorage.java
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index 62251727788d48a461ea6f7945771d7d6bdc7282..106610ccc74b70b557b01c61262d56c4f1147acf 100644
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--- a/src/main/java/net/minecraft/util/BitStorage.java
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+++ b/src/main/java/net/minecraft/util/BitStorage.java
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@@ -20,4 +20,15 @@ public interface BitStorage {
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void unpack(int[] is);
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BitStorage copy();
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+
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+ // Paper start
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+ void forEach(DataBitConsumer consumer);
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+
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+ @FunctionalInterface
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+ interface DataBitConsumer {
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+
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+ void accept(int location, int data);
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+
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+ }
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+ // Paper end
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}
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diff --git a/src/main/java/net/minecraft/util/SimpleBitStorage.java b/src/main/java/net/minecraft/util/SimpleBitStorage.java
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index 9b81ce9d85cba07e9752c29fb5a842c4b00aa873..36e33923bf48e56c743ed043bcbc66bc32f0422f 100644
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--- a/src/main/java/net/minecraft/util/SimpleBitStorage.java
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+++ b/src/main/java/net/minecraft/util/SimpleBitStorage.java
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@@ -124,6 +124,28 @@ public class SimpleBitStorage implements BitStorage {
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return this.bits;
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}
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+ // Paper start
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+ @Override
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+ public final void forEach(DataBitConsumer consumer) {
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+ int i = 0;
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+ long[] along = this.data;
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+ int j = along.length;
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+
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+ for (int k = 0; k < j; ++k) {
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+ long l = along[k];
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+
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+ for (int i1 = 0; i1 < this.valuesPerLong; ++i1) {
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+ consumer.accept(i, (int) (l & this.mask));
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+ l >>= this.bits;
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+ ++i;
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+ if (i >= this.size) {
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+ return;
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+ }
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+ }
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+ }
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+ }
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+ // Paper end
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+
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@Override
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public void getAll(IntConsumer action) {
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int i = 0;
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diff --git a/src/main/java/net/minecraft/util/ZeroBitStorage.java b/src/main/java/net/minecraft/util/ZeroBitStorage.java
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index 9686ce7536c9924b1b2aced4f013f46759cbc72e..5d8e9bdf5538b19681f21949368d862fab8a89ad 100644
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--- a/src/main/java/net/minecraft/util/ZeroBitStorage.java
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+++ b/src/main/java/net/minecraft/util/ZeroBitStorage.java
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@@ -46,6 +46,15 @@ public class ZeroBitStorage implements BitStorage {
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return 0;
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}
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+ // Paper start
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+ @Override
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+ public void forEach(DataBitConsumer consumer) {
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+ for(int i = 0; i < this.size; ++i) {
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+ consumer.accept(i, 0);
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+ }
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+ }
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+ // Paper end
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+
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@Override
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public void getAll(IntConsumer action) {
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for(int i = 0; i < this.size; ++i) {
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diff --git a/src/main/java/net/minecraft/world/entity/animal/Turtle.java b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
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index 69c98c2cb2fd8f149a39bbddcbfe0c5c5adc3904..5575730aa6f77a91467c394fa8465c335d73db8e 100644
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--- a/src/main/java/net/minecraft/world/entity/animal/Turtle.java
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+++ b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
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@@ -83,7 +83,7 @@ public class Turtle extends Animal {
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}
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public void setHomePos(BlockPos pos) {
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- this.entityData.set(Turtle.HOME_POS, pos);
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+ this.entityData.set(Turtle.HOME_POS, pos.immutable()); // Paper - called with mutablepos...
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}
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public BlockPos getHomePos() {
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index e07b094cf19bc94a4e3ef726f37973eaff7aaf6d..03f7eb8a56fd4e609bc7b1a00d18cad5586a41dd 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -1302,10 +1302,18 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
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public abstract RecipeManager getRecipeManager();
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public BlockPos getBlockRandomPos(int x, int y, int z, int l) {
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+ // Paper start - allow use of mutable pos
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+ BlockPos.MutableBlockPos ret = new BlockPos.MutableBlockPos();
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+ this.getRandomBlockPosition(x, y, z, l, ret);
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+ return ret.immutable();
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+ }
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+ public final BlockPos.MutableBlockPos getRandomBlockPosition(int x, int y, int z, int l, BlockPos.MutableBlockPos out) {
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+ // Paper end
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this.randValue = this.randValue * 3 + 1013904223;
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int i1 = this.randValue >> 2;
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- return new BlockPos(x + (i1 & 15), y + (i1 >> 16 & l), z + (i1 >> 8 & 15));
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+ out.set(x + (i1 & 15), y + (i1 >> 16 & l), z + (i1 >> 8 & 15)); // Paper - change to setValues call
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+ return out; // Paper
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}
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|
|
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public boolean noSave() {
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diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
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index 2ad73237f4664535c3d5120a54b713f44cddb793..c2e3df8331cec5fe5650501a4dc4ac47f23ef11b 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunkSection.java
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@@ -27,6 +27,7 @@ public class LevelChunkSection {
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public final PalettedContainer<BlockState> states;
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// CraftBukkit start - read/write
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private PalettedContainer<Holder<Biome>> biomes;
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+ public final com.destroystokyo.paper.util.maplist.IBlockDataList tickingList = new com.destroystokyo.paper.util.maplist.IBlockDataList(); // Paper
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|
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public LevelChunkSection(int i, PalettedContainer<BlockState> datapaletteblock, PalettedContainer<Holder<Biome>> palettedcontainerro) {
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// CraftBukkit end
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|
@@ -85,6 +86,9 @@ public class LevelChunkSection {
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--this.nonEmptyBlockCount;
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if (iblockdata1.isRandomlyTicking()) {
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--this.tickingBlockCount;
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+ // Paper start
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+ this.tickingList.remove(x, y, z);
|
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+ // Paper end
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}
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}
|
|
|
|
@@ -96,6 +100,9 @@ public class LevelChunkSection {
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++this.nonEmptyBlockCount;
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if (state.isRandomlyTicking()) {
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++this.tickingBlockCount;
|
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+ // Paper start
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+ this.tickingList.add(x, y, z, state);
|
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+ // Paper end
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}
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}
|
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|
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@@ -127,40 +134,31 @@ public class LevelChunkSection {
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}
|
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|
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public void recalcBlockCounts() {
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- class a implements PalettedContainer.CountConsumer<BlockState> {
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-
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- public int nonEmptyBlockCount;
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- public int tickingBlockCount;
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- public int tickingFluidCount;
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-
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- a() {}
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-
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- public void accept(BlockState iblockdata, int i) {
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- FluidState fluid = iblockdata.getFluidState();
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-
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- if (!iblockdata.isAir()) {
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- this.nonEmptyBlockCount += i;
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- if (iblockdata.isRandomlyTicking()) {
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- this.tickingBlockCount += i;
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- }
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+ // Paper start - unfuck this
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+ this.tickingList.clear();
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+ this.nonEmptyBlockCount = 0;
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+ this.tickingBlockCount = 0;
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+ this.tickingFluidCount = 0;
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+ this.states.forEachLocation((BlockState iblockdata, int i) -> {
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+ FluidState fluid = iblockdata.getFluidState();
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+
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+ if (!iblockdata.isAir()) {
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+ this.nonEmptyBlockCount = (short) (this.nonEmptyBlockCount + 1);
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+ if (iblockdata.isRandomlyTicking()) {
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+ this.tickingBlockCount = (short)(this.tickingBlockCount + 1);
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+ this.tickingList.add(i, iblockdata);
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}
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+ }
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- if (!fluid.isEmpty()) {
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- this.nonEmptyBlockCount += i;
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- if (fluid.isRandomlyTicking()) {
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- this.tickingFluidCount += i;
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- }
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+ if (!fluid.isEmpty()) {
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+ this.nonEmptyBlockCount = (short) (this.nonEmptyBlockCount + 1);
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+ if (fluid.isRandomlyTicking()) {
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+ this.tickingFluidCount = (short) (this.tickingFluidCount + 1);
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}
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-
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}
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- }
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- a a0 = new a();
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-
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- this.states.count(a0);
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- this.nonEmptyBlockCount = (short) a0.nonEmptyBlockCount;
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- this.tickingBlockCount = (short) a0.tickingBlockCount;
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- this.tickingFluidCount = (short) a0.tickingFluidCount;
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+ });
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+ // Paper end
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}
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public PalettedContainer<BlockState> getStates() {
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diff --git a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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index 6800452604e0db660e8d5dca9778abd6e2f66478..6fb87dcdc4fab4b430a5c9003548c874e6b26734 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/PalettedContainer.java
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@@ -382,6 +382,14 @@ public class PalettedContainer<T> implements PaletteResize<T>, PalettedContainer
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}
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}
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+ // Paper start
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+ public void forEachLocation(PalettedContainer.CountConsumer<T> consumer) {
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+ this.data.storage.forEach((int location, int data) -> {
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+ consumer.accept(this.data.palette.valueFor(data), location);
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+ });
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+ }
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+ // Paper end
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+
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@FunctionalInterface
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public interface CountConsumer<T> {
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void accept(T object, int count);
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