mirror of
https://github.com/PaperMC/Paper.git
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229 lines
11 KiB
Diff
229 lines
11 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: Wed, 15 Apr 2020 18:08:53 -0700
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Subject: [PATCH] Optimise entity hard collision checking
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Very few entities actually hard collide, so store them in their own
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entity slices and provide a special getEntites type call just for them.
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This reduces entity collision checking impact (in my testing) by 25%
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for crammed entities (shove 130 cows into an 8x6 area in one chunk).
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Less crammed entities are likely to show significantly less benefit.
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Effectively, this patch optimises crammed entity situations.
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diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
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index cb24f27bc443880b18ffc36236f6ec7174c9d493..b65ae2d6919a67498d0646c5522735086fec00c1 100644
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--- a/src/main/java/net/minecraft/server/Chunk.java
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+++ b/src/main/java/net/minecraft/server/Chunk.java
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@@ -91,6 +91,54 @@ public class Chunk implements IChunkAccess {
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private final int[] inventoryEntityCounts = new int[16];
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// Paper end
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+ // Paper start - optimise hard collision handling
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+ final com.destroystokyo.paper.util.maplist.EntityList[] hardCollidingEntities = new com.destroystokyo.paper.util.maplist.EntityList[16];
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+
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+ {
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+ for (int i = 0, len = this.hardCollidingEntities.length; i < len; ++i) {
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+ this.hardCollidingEntities[i] = new com.destroystokyo.paper.util.maplist.EntityList();
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+ }
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+ }
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+
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+ public final void getHardCollidingEntities(@Nullable Entity entity, AxisAlignedBB axisalignedbb, List<Entity> into, Predicate<Entity> predicate) {
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+ // copied from getEntities
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+ int min = MathHelper.floor((axisalignedbb.minY - 2.0D) / 16.0D);
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+ int max = MathHelper.floor((axisalignedbb.maxY + 2.0D) / 16.0D);
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+
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+ min = MathHelper.clamp(min, 0, this.hardCollidingEntities.length - 1);
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+ max = MathHelper.clamp(max, 0, this.hardCollidingEntities.length - 1);
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+
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+ for (int k = min; k <= max; ++k) {
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+ com.destroystokyo.paper.util.maplist.EntityList entityList = this.hardCollidingEntities[k];
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+ Entity[] entities = entityList.getRawData();
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+
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+ for (int i = 0, len = entityList.size(); i < len; ++i) {
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+ Entity entity1 = entities[i];
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+ if (entity1.shouldBeRemoved) continue; // Paper
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+
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+ if (entity1 != entity && entity1.getBoundingBox().intersects(axisalignedbb) && (predicate == null || predicate.test(entity1))) {
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+ into.add(entity1);
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+
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+ if (!(entity1 instanceof EntityEnderDragon)) {
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+ continue;
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+ }
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+
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+ EntityComplexPart[] aentitycomplexpart = ((EntityEnderDragon) entity1).getComplexParts();
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+ int l = aentitycomplexpart.length;
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+
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+ for (int i1 = 0; i1 < l; ++i1) {
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+ EntityComplexPart entitycomplexpart = aentitycomplexpart[i1];
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+
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+ if (entitycomplexpart != entity && entitycomplexpart.getBoundingBox().intersects(axisalignedbb) && (predicate == null || predicate.test(entitycomplexpart))) {
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+ into.add(entitycomplexpart);
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ // Paper end - optimise hard collision handling
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+
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public Chunk(World world, ChunkCoordIntPair chunkcoordintpair, BiomeStorage biomestorage, ChunkConverter chunkconverter, TickList<Block> ticklist, TickList<FluidType> ticklist1, long i, @Nullable ChunkSection[] achunksection, @Nullable Consumer<Chunk> consumer) {
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this.sections = new ChunkSection[16];
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this.e = Maps.newHashMap();
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@@ -546,7 +594,7 @@ public class Chunk implements IChunkAccess {
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entity.chunkY = k;
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entity.chunkZ = this.loc.z;
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this.entities.add(entity); // Paper - per chunk entity list
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- this.entitySlices[k].add(entity);
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+ this.entitySlices[k].add(entity); if (entity.hardCollides()) this.hardCollidingEntities[k].add(entity); // Paper - optimise hard colliding entities
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// Paper start
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if (entity instanceof EntityItem) {
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itemCounts[k]++;
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@@ -583,7 +631,7 @@ public class Chunk implements IChunkAccess {
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entity.entitySlice = null;
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entity.inChunk = false;
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}
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- if (!this.entitySlices[i].remove(entity)) {
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+ if (entity.hardCollides()) this.hardCollidingEntities[i].remove(entity); if (!this.entitySlices[i].remove(entity)) { // Paper - optimise hard colliding entities
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return;
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}
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if (entity instanceof EntityItem) {
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diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
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index 8f1e8728502d1dcae1fb538875f72460fc926d7c..c879e5d9acd400db5b7fdb770e5f8cc419e3bb23 100644
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--- a/src/main/java/net/minecraft/server/Entity.java
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+++ b/src/main/java/net/minecraft/server/Entity.java
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@@ -211,6 +211,40 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
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}
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// CraftBukkit end
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+ // Paper start
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+ /**
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+ * Overriding this field will cause memory leaks.
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+ */
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+ private final boolean hardCollides;
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+
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+ private static final java.util.Map<Class<? extends Entity>, Boolean> cachedOverrides = java.util.Collections.synchronizedMap(new java.util.WeakHashMap<>());
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+ {
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+ Boolean hardCollides = cachedOverrides.get(this.getClass());
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+ if (hardCollides == null) {
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+ try {
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+ Object getHardCollisionBoxMethod = Entity.class.getMethod("ay");
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+ Object getHardCollisionBoxEntityMethod = Entity.class.getMethod("j", Entity.class);
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+ if (!this.getClass().getMethod("ay").equals(getHardCollisionBoxMethod)) {
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+ hardCollides = Boolean.TRUE;
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+ } else if (!this.getClass().getMethod("j", Entity.class).equals(getHardCollisionBoxEntityMethod)) {
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+ hardCollides = Boolean.TRUE;
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+ } else {
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+ hardCollides = Boolean.FALSE;
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+ }
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+ cachedOverrides.put(this.getClass(), hardCollides);
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+ } catch (Throwable thr) {
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+ // shouldn't happen, just explode
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+ throw new RuntimeException(thr);
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+ }
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+ }
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+ this.hardCollides = hardCollides.booleanValue();
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+ }
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+
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+ public final boolean hardCollides() {
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+ return this.hardCollides;
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+ }
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+ // Paper end
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+
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public Entity(EntityTypes<?> entitytypes, World world) {
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this.id = Entity.entityCount.incrementAndGet();
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this.passengers = Lists.newArrayList();
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diff --git a/src/main/java/net/minecraft/server/EntityEnderDragon.java b/src/main/java/net/minecraft/server/EntityEnderDragon.java
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index 96f898acdeae1917a4aaf99ec4a48bccf3904488..73e9859e675902d9fc5942547966b52426a496a2 100644
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--- a/src/main/java/net/minecraft/server/EntityEnderDragon.java
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+++ b/src/main/java/net/minecraft/server/EntityEnderDragon.java
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@@ -844,6 +844,7 @@ public class EntityEnderDragon extends EntityInsentient implements IMonster {
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@Override
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public void checkDespawn() {}
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+ public final EntityComplexPart[] getComplexParts() { return this.eK(); } // Paper - OBFHELPER
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public EntityComplexPart[] eK() {
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return this.children;
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}
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diff --git a/src/main/java/net/minecraft/server/IEntityAccess.java b/src/main/java/net/minecraft/server/IEntityAccess.java
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index 74d4c28246e7db850e6d993e07a84b2a6ca24ce2..267a6baae89c181eed545e6758fac7115eb3882f 100644
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--- a/src/main/java/net/minecraft/server/IEntityAccess.java
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+++ b/src/main/java/net/minecraft/server/IEntityAccess.java
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@@ -53,24 +53,36 @@ public interface IEntityAccess {
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return this.b(oclass, axisalignedbb, IEntitySelector.g);
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}
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+ // Paper start - optimise hard collision
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+ /**
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+ * Not guaranteed to only return hard colliding entites
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+ */
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+ default List<Entity> getHardCollidingEntities(@Nullable Entity entity, AxisAlignedBB axisalignedbb, Predicate<Entity> predicate) {
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+ return this.getEntities(entity, axisalignedbb, predicate);
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+ }
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+ // Paper end - optimise hard collision
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+
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default Stream<VoxelShape> c(@Nullable Entity entity, AxisAlignedBB axisalignedbb, Predicate<Entity> predicate) {
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if (axisalignedbb.a() < 1.0E-7D) {
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return Stream.empty();
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} else {
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AxisAlignedBB axisalignedbb1 = axisalignedbb.g(1.0E-7D);
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- return this.getEntities(entity, axisalignedbb1, predicate.and((entity1) -> {
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+ // Paper start
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+ Predicate<Entity> effectivePredicate = predicate.and((entity1) -> {
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return entity == null || !entity.isSameVehicle(entity1);
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- })).stream().flatMap((entity1) -> {
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+ });
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+
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+ return ((entity != null && entity.hardCollides()) ? this.getEntities(entity, axisalignedbb, effectivePredicate) : this.getHardCollidingEntities(entity, axisalignedbb1, effectivePredicate)).stream().flatMap((entity1) -> {
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if (entity != null) {
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- AxisAlignedBB axisalignedbb2 = entity.j(entity1);
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+ AxisAlignedBB axisalignedbb2 = entity.j(entity1); // Paper - diff on change, hard collision box method
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if (axisalignedbb2 != null && axisalignedbb2.c(axisalignedbb1)) {
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return Stream.of(entity1.ay(), axisalignedbb2);
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}
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}
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- return Stream.of(entity1.ay());
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+ return Stream.of(entity1.ay()); // Paper - diff on change, hard collision box method
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}).filter(Objects::nonNull).map(VoxelShapes::a);
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}
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}
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index 418ba04a837ee2b17cc679edd35ba09830c01f28..365539e53efdb7e729b580f52fb23659cbde4f0a 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -1111,6 +1111,32 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
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return this.getChunkAt(i, j, ChunkStatus.FULL, false);
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}
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+ // Paper start - optimise hard collision handling
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+ @Override
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+ public List<Entity> getHardCollidingEntities(@Nullable Entity entity, AxisAlignedBB axisalignedbb, Predicate<Entity> predicate) {
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+ // copied from below
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+ List<Entity> list = Lists.newArrayList();
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+ int i = MathHelper.floor((axisalignedbb.minX - 2.0D) / 16.0D);
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+ int j = MathHelper.floor((axisalignedbb.maxX + 2.0D) / 16.0D);
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+ int k = MathHelper.floor((axisalignedbb.minZ - 2.0D) / 16.0D);
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+ int l = MathHelper.floor((axisalignedbb.maxZ + 2.0D) / 16.0D);
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+
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+ ChunkProviderServer chunkProvider = ((WorldServer)this).getChunkProvider();
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+
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+ for (int i1 = i; i1 <= j; ++i1) {
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+ for (int j1 = k; j1 <= l; ++j1) {
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+ Chunk chunk = chunkProvider.getChunkAtIfLoadedMainThread(i1, j1);
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+
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+ if (chunk != null) {
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+ chunk.getHardCollidingEntities(entity, axisalignedbb, list, predicate);
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+ }
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+ }
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+ }
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+
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+ return list;
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+ }
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+ // Paper end - optimise hard collision handling
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+
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@Override
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public List<Entity> getEntities(@Nullable Entity entity, AxisAlignedBB axisalignedbb, @Nullable Predicate<? super Entity> predicate) {
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this.getMethodProfiler().c("getEntities");
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