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. diff --git a/src/main/java/net/minecraft/server/ICollisionAccess.java b/src/main/java/net/minecraft/server/ICollisionAccess.java index f851ed11df14fd9aa8017f44d82fb6cfc3bde345..8b0670b8db0bb739fb54fee368a53eadeb72937e 100644 --- a/src/main/java/net/minecraft/server/ICollisionAccess.java +++ b/src/main/java/net/minecraft/server/ICollisionAccess.java @@ -83,19 +83,33 @@ public interface ICollisionAccess extends IBlockAccess { } while (cursorposition.a()) { - int k1 = cursorposition.b(); - int l1 = cursorposition.c(); - int i2 = cursorposition.d(); + int k1 = cursorposition.b();int x = k1; // Paper + int l1 = cursorposition.c();int y = l1; // Paper + int i2 = cursorposition.d();int z = i2; // Paper int j2 = cursorposition.e(); if (j2 != 3) { - int k2 = k1 >> 4; - int l2 = i2 >> 4; - IBlockAccess iblockaccess = ICollisionAccess.this.c(k2, l2); - - if (iblockaccess != null) { - blockposition_mutableblockposition.d(k1, l1, i2); - IBlockData iblockdata = iblockaccess.getType(blockposition_mutableblockposition); + // Paper start - ensure we don't load chunks + //int k2 = k1 >> 4; + //int l2 = i2 >> 4; + boolean far = entity != null && MCUtil.distanceSq(entity.locX(), y, entity.locZ(), x, y, z) > 14; + blockposition_mutableblockposition.setValues(x, y, z); + + boolean isRegionLimited = ICollisionAccess.this instanceof RegionLimitedWorldAccess; + IBlockData iblockdata = isRegionLimited ? Blocks.VOID_AIR.getBlockData() : (!far && entity instanceof EntityPlayer + ? ICollisionAccess.this.getType(blockposition_mutableblockposition) + : ICollisionAccess.this.getTypeIfLoaded(blockposition_mutableblockposition) + ); + if (iblockdata == null) { + if (!(entity instanceof EntityPlayer) || entity.world.paperConfig.preventMovingIntoUnloadedChunks) { + VoxelShape voxelshape3 = VoxelShapes.of(far ? entity.getBoundingBox() : new AxisAlignedBB(new BlockPosition(x, y, z))); + consumer.accept(voxelshape3); + return true; + } + } else { + //blockposition_mutableblockposition.d(k1, l1, i2); // moved up + //IBlockData iblockdata = iblockaccess.getType(blockposition_mutableblockposition); // moved up + // Paper end if ((j2 != 1 || iblockdata.f()) && (j2 != 2 || iblockdata.getBlock() == Blocks.MOVING_PISTON)) { VoxelShape voxelshape2 = iblockdata.b((IBlockAccess) ICollisionAccess.this, blockposition_mutableblockposition, voxelshapecollision); diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java index 909d86e14c7860cd6d8a6f38ef4aedb183acae3f..fddd92677db06aa9fc41437f34719d9ae6e44c93 100644 --- a/src/main/java/net/minecraft/server/PlayerList.java +++ b/src/main/java/net/minecraft/server/PlayerList.java @@ -677,6 +677,7 @@ public abstract class PlayerList { entityplayer1.forceSetPositionRotation(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch()); // CraftBukkit end + location.getChunk(); // Paper - force load chunk to be sure getCubes works while (avoidSuffocation && !worldserver.getCubes(entityplayer1) && entityplayer1.locY() < 256.0D) { entityplayer1.setPosition(entityplayer1.locX(), entityplayer1.locY() + 1.0D, entityplayer1.locZ()); } diff --git a/src/main/java/net/minecraft/server/VoxelShapes.java b/src/main/java/net/minecraft/server/VoxelShapes.java index 335142ec0dfad822cfe40877e99dec0f307e1a58..e641d4b8d8b4ac5d539e6d9c0eaf345601e0b499 100644 --- a/src/main/java/net/minecraft/server/VoxelShapes.java +++ b/src/main/java/net/minecraft/server/VoxelShapes.java @@ -239,7 +239,8 @@ public final class VoxelShapes { if (k2 < 3) { blockposition_mutableblockposition.a(enumaxiscycle1, i2, j2, l1); - IBlockData iblockdata = iworldreader.getType(blockposition_mutableblockposition); + IBlockData iblockdata = iworldreader.getTypeIfLoaded(blockposition_mutableblockposition); // Paper + if (iblockdata == null) return 0.0D; // Paper if ((k2 != 1 || iblockdata.f()) && (k2 != 2 || iblockdata.getBlock() == Blocks.MOVING_PISTON)) { d0 = iblockdata.b((IBlockAccess) iworldreader, blockposition_mutableblockposition, voxelshapecollision).a(enumdirection_enumaxis2, axisalignedbb.d((double) (-blockposition_mutableblockposition.getX()), (double) (-blockposition_mutableblockposition.getY()), (double) (-blockposition_mutableblockposition.getZ())), d0);