112 lines
6.8 KiB
Diff
112 lines
6.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Thu, 2 Apr 2020 02:37:57 -0400
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Subject: [PATCH] Optimize Collision to not load chunks
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The collision code takes an AABB and generates a cuboid of checks rather
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than a cylinder, so at high velocity this can generate a lot of chunk checks.
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Treat an unloaded chunk as a collision for entities, and also for players if
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the "prevent moving into unloaded chunks" setting is enabled.
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If that serting is not enabled, collisions will be ignored for players, since
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movement will load only the chunk the player enters anyways and avoids loading
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massive amounts of surrounding chunks due to large AABB lookups.
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diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
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index 5d4ef973781eac558c1e8d749f751c04a67c4693..33b607227718e08f26d7ab5744bbbff806f33366 100644
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--- a/src/main/java/net/minecraft/server/players/PlayerList.java
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+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
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@@ -791,6 +791,7 @@ public abstract class PlayerList {
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entityplayer1.forceSetPositionRotation(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
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// CraftBukkit end
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+ worldserver1.getChunkSource().addRegionTicket(net.minecraft.server.level.TicketType.POST_TELEPORT, new net.minecraft.world.level.ChunkPos(location.getBlockX() >> 4, location.getBlockZ() >> 4), 1, entityplayer.getId()); // Paper
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while (avoidSuffocation && !worldserver1.noCollision(entityplayer1) && entityplayer1.getY() < (double) worldserver1.getMaxBuildHeight()) {
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entityplayer1.setPos(entityplayer1.getX(), entityplayer1.getY() + 1.0D, entityplayer1.getZ());
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}
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index 13e6fd62d7e9026a31455c5e2fa36392c7a0b249..c068e5fad2d9238201cada0d3a77ff2af1b8d8e1 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -171,6 +171,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
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// Paper end
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public com.destroystokyo.paper.loottable.PaperLootableInventoryData lootableData; // Paper
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+ public boolean collisionLoadChunks = false; // Paper
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private CraftEntity bukkitEntity;
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public net.minecraft.server.level.ChunkMap.TrackedEntity tracker; // Paper
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diff --git a/src/main/java/net/minecraft/world/level/BlockCollisions.java b/src/main/java/net/minecraft/world/level/BlockCollisions.java
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index 8390ce194ccc692139c0e870c16a7fb76ac8ba68..d40bbc5ae6b87028a6dde400ea714249792da79a 100644
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--- a/src/main/java/net/minecraft/world/level/BlockCollisions.java
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+++ b/src/main/java/net/minecraft/world/level/BlockCollisions.java
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@@ -66,22 +66,41 @@ public class BlockCollisions extends AbstractIterator<VoxelShape> {
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protected VoxelShape computeNext() {
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while(true) {
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if (this.cursor.advance()) {
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- int i = this.cursor.nextX();
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- int j = this.cursor.nextY();
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- int k = this.cursor.nextZ();
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+ int i = this.cursor.nextX(); final int x = i; // Paper
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+ int j = this.cursor.nextY(); final int y = j; // Paper
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+ int k = this.cursor.nextZ(); final int z = k; // Paper
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int l = this.cursor.getNextType();
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if (l == 3) {
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continue;
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}
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+ // Paper start - ensure we don't load chunks
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+ final @Nullable Entity source = this.context instanceof net.minecraft.world.phys.shapes.EntityCollisionContext entityContext ? entityContext.getEntity() : null;
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+ boolean far = source != null && net.minecraft.server.MCUtil.distanceSq(source.getX(), y, source.getZ(), x, y, z) > 14;
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+ this.pos.set(x, y, z);
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- BlockGetter blockGetter = this.getChunk(i, k);
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- if (blockGetter == null) {
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+ BlockState blockState;
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+ if (this.collisionGetter instanceof net.minecraft.server.level.WorldGenRegion) {
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+ BlockGetter blockGetter = this.getChunk(x, z);
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+ if (blockGetter == null) {
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+ continue;
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+ }
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+ blockState = blockGetter.getBlockState(this.pos);
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+ } else if ((!far && source instanceof net.minecraft.server.level.ServerPlayer) || (source != null && source.collisionLoadChunks)) {
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+ blockState = this.collisionGetter.getBlockState(this.pos);
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+ } else {
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+ blockState = this.collisionGetter.getTypeIfLoaded(this.pos);
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+ }
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+
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+ if (blockState == null) {
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+ if (!(source instanceof net.minecraft.server.level.ServerPlayer) || source.level.paperConfig.preventMovingIntoUnloadedChunks) {
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+ return Shapes.create(far ? source.getBoundingBox() : new AABB(new BlockPos(x, y, z)));
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+ }
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+ // Paper end
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continue;
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}
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- this.pos.set(i, j, k);
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- BlockState blockState = blockGetter.getBlockState(this.pos);
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- if (this.onlySuffocatingBlocks && !blockState.isSuffocating(blockGetter, this.pos) || l == 1 && !blockState.hasLargeCollisionShape() || l == 2 && !blockState.is(Blocks.MOVING_PISTON)) {
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+ // Paper - moved up
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+ if (/*this.onlySuffocatingBlocks && (!blockState.isSuffocating(blockGetter, this.pos)) ||*/ l == 1 && !blockState.hasLargeCollisionShape() || l == 2 && !blockState.is(Blocks.MOVING_PISTON)) { // Paper - onlySuffocatingBlocks is only true on the client, so we don't care about it here
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continue;
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}
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diff --git a/src/main/java/net/minecraft/world/level/CollisionGetter.java b/src/main/java/net/minecraft/world/level/CollisionGetter.java
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index 4c373d6c8ddd9f5db88888cd8dbbfc24eb5df793..56d94c94fb0d4dc468bb5d69be655ddd5c6b5360 100644
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--- a/src/main/java/net/minecraft/world/level/CollisionGetter.java
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+++ b/src/main/java/net/minecraft/world/level/CollisionGetter.java
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@@ -44,11 +44,13 @@ public interface CollisionGetter extends BlockGetter {
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}
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default boolean noCollision(@Nullable Entity entity, AABB box) {
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+ try { if (entity != null) entity.collisionLoadChunks = true; // Paper
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for(VoxelShape voxelShape : this.getBlockCollisions(entity, box)) {
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if (!voxelShape.isEmpty()) {
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return false;
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}
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}
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+ } finally { if (entity != null) entity.collisionLoadChunks = false; } // Paper
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if (!this.getEntityCollisions(entity, box).isEmpty()) {
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return false;
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