From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Aikar Date: Thu, 2 Apr 2020 02:37:57 -0400 Subject: [PATCH] Optimize Collision to not load chunks The collision code takes an AABB and generates a cuboid of checks rather than a cylinder, so at high velocity this can generate a lot of chunk checks. Treat an unloaded chunk as a collision for entities, and also for players if the "prevent moving into unloaded chunks" setting is enabled. If that serting is not enabled, collisions will be ignored for players, since movement will load only the chunk the player enters anyways and avoids loading massive amounts of surrounding chunks due to large AABB lookups. Feature patch diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644 --- a/src/main/java/net/minecraft/server/players/PlayerList.java +++ b/src/main/java/net/minecraft/server/players/PlayerList.java @@ -0,0 +0,0 @@ public abstract class PlayerList { Vec3 vec3d = teleporttransition.position(); entityplayer1.forceSetPositionRotation(vec3d.x, vec3d.y, vec3d.z, teleporttransition.yRot(), teleporttransition.xRot()); + worldserver.getChunkSource().addRegionTicket(net.minecraft.server.level.TicketType.POST_TELEPORT, new net.minecraft.world.level.ChunkPos(net.minecraft.util.Mth.floor(vec3d.x()) >> 4, net.minecraft.util.Mth.floor(vec3d.z()) >> 4), 1, entityplayer.getId()); // Paper // CraftBukkit end if (teleporttransition.missingRespawnBlock()) { entityplayer1.connection.send(new ClientboundGameEventPacket(ClientboundGameEventPacket.NO_RESPAWN_BLOCK_AVAILABLE, 0.0F)); diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644 --- a/src/main/java/net/minecraft/world/entity/Entity.java +++ b/src/main/java/net/minecraft/world/entity/Entity.java @@ -0,0 +0,0 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess // Paper end - Share random for entities to make them more random public org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason spawnReason; // Paper - Entity#getEntitySpawnReason + public boolean collisionLoadChunks = false; // Paper private CraftEntity bukkitEntity; public CraftEntity getBukkitEntity() { diff --git a/src/main/java/net/minecraft/world/level/BlockCollisions.java b/src/main/java/net/minecraft/world/level/BlockCollisions.java index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644 --- a/src/main/java/net/minecraft/world/level/BlockCollisions.java +++ b/src/main/java/net/minecraft/world/level/BlockCollisions.java @@ -0,0 +0,0 @@ public class BlockCollisions extends AbstractIterator { @Override protected T computeNext() { while (this.cursor.advance()) { - int i = this.cursor.nextX(); - int j = this.cursor.nextY(); - int k = this.cursor.nextZ(); + int i = this.cursor.nextX(); final int x = i; // Paper - OBFHELPER + int j = this.cursor.nextY(); final int y = j; // Paper - OBFHELPER + int k = this.cursor.nextZ(); final int z = k; // Paper - OBFHELPER int l = this.cursor.getNextType(); if (l != 3) { - BlockGetter blockGetter = this.getChunk(i, k); - if (blockGetter != null) { - this.pos.set(i, j, k); - BlockState blockState = blockGetter.getBlockState(this.pos); - if ((!this.onlySuffocatingBlocks || blockState.isSuffocating(blockGetter, this.pos)) + // Paper start - ensure we don't load chunks + // BlockGetter blockGetter = this.getChunk(i, k); + if (true) { + final @Nullable Entity source = this.context instanceof net.minecraft.world.phys.shapes.EntityCollisionContext entityContext ? entityContext.getEntity() : null; + boolean far = source != null && io.papermc.paper.util.MCUtil.distanceSq(source.getX(), y, source.getZ(), x, y, z) > 14; + this.pos.set(x, y, z); + BlockState blockState; + if (this.collisionGetter instanceof net.minecraft.server.level.WorldGenRegion) { + BlockGetter blockGetter = this.getChunk(x, z); + if (blockGetter == null) { + continue; + } + blockState = blockGetter.getBlockState(this.pos); + } else if ((!far && source instanceof net.minecraft.server.level.ServerPlayer) || (source != null && source.collisionLoadChunks)) { + blockState = this.collisionGetter.getBlockState(this.pos); + } else { + blockState = this.collisionGetter.getBlockStateIfLoaded(this.pos); + } + if (blockState == null) { + if (!(source instanceof net.minecraft.server.level.ServerPlayer) || source.level().paperConfig().chunks.preventMovingIntoUnloadedChunks) { + return this.resultProvider.apply(new BlockPos.MutableBlockPos(x, y, z), Shapes.create(far ? source.getBoundingBox() : new AABB(new BlockPos(x, y, z)))); + } + continue; + } + if (true // onlySuffocatingBlocks is only true on the client, so we don't care about it here + // Paper end - ensure we don't load chunks && (l != 1 || blockState.hasLargeCollisionShape()) && (l != 2 || blockState.is(Blocks.MOVING_PISTON))) { VoxelShape voxelShape = this.context.getCollisionShape(blockState, this.collisionGetter, this.pos); diff --git a/src/main/java/net/minecraft/world/level/CollisionGetter.java b/src/main/java/net/minecraft/world/level/CollisionGetter.java index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644 --- a/src/main/java/net/minecraft/world/level/CollisionGetter.java +++ b/src/main/java/net/minecraft/world/level/CollisionGetter.java @@ -0,0 +0,0 @@ public interface CollisionGetter extends BlockGetter { } default boolean noCollision(@Nullable Entity entity, AABB box, boolean checkFluid) { - for (VoxelShape voxelShape : checkFluid ? this.getBlockAndLiquidCollisions(entity, box) : this.getBlockCollisions(entity, box)) { + try { if (entity != null) entity.collisionLoadChunks = true; // Paper + for (VoxelShape voxelShape : checkFluid ? this.getBlockAndLiquidCollisions(entity, box) : this.getBlockCollisions(entity, box)) { if (!voxelShape.isEmpty()) { return false; } } + } finally { if (entity != null) entity.collisionLoadChunks = false; } // Paper if (!this.getEntityCollisions(entity, box).isEmpty()) { return false;