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Gale/patches/server/0020-Strip-raytracing-for-EntityLiving-hasLineOfSight.patch
Martijn Muijsers df15eb24b5 Add virtual thread utility and expand metrics
2023-08-09 19:21:03 +02:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Wed, 23 Nov 2022 16:15:43 +0100
Subject: [PATCH] Strip raytracing for EntityLiving#hasLineOfSight
License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
Gale - https://galemc.org
This patch is based on the following patch:
"Strip raytracing for EntityLiving#hasLineOfSight"
By: Paul Sauve <paul@technove.co>
As part of: Airplane (https://github.com/TECHNOVE/Airplane)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
* Airplane description *
The IBlockAccess#rayTrace method is very wasteful in both allocations,
and in logic. While EntityLiving#hasLineOfSight provides static
parameters for collisions with blocks and fluids, the method still does
a lot of dynamic checks for both of these, which result in extra work.
As well, since the fluid collision option is set to NONE, the entire
fluid collision system is completely unneeded, yet used anyways.
* Airplane copyright *
Airplane
Copyright (C) 2020 Technove LLC
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 056d7f857cbda68792ee27b35f14fc6872fd90e1..e1f8f3480bfda2bc3c042d0b57cbb051ad3d95bc 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -3633,7 +3633,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
Vec3 vec3d1 = new Vec3(entity.getX(), entity.getEyeY(), entity.getZ());
// Paper - diff on change - used in CraftLivingEntity#hasLineOfSight(Location) and CraftWorld#lineOfSightExists
- return vec3d1.distanceToSqr(vec3d) > 128D * 128D ? false : this.level().clip(new ClipContext(vec3d, vec3d1, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, this)).getType() == HitResult.Type.MISS;
+ return vec3d1.distanceToSqr(vec3d) > 128D * 128D ? false : this.level().rayTraceDirect(vec3d, vec3d1, net.minecraft.world.phys.shapes.CollisionContext.of(this)) == net.minecraft.world.phys.BlockHitResult.Type.MISS; // Paper - use distanceToSqr // Gale - Airplane - strip raytracing for EntityLiving#hasLineOfSight
}
}
diff --git a/src/main/java/net/minecraft/world/level/BlockGetter.java b/src/main/java/net/minecraft/world/level/BlockGetter.java
index 0e8746759752b692668886370181aa5db1fd0bb0..e5e50817c83b6a7d3daf90960ed402180998ca49 100644
--- a/src/main/java/net/minecraft/world/level/BlockGetter.java
+++ b/src/main/java/net/minecraft/world/level/BlockGetter.java
@@ -68,6 +68,16 @@ public interface BlockGetter extends LevelHeightAccessor {
});
}
+ // Gale start - Airplane - strip raytracing for EntityLiving#hasLineOfSight - broken down variant of below rayTraceBlock, used by World#rayTraceDirect
+ default net.minecraft.world.phys.BlockHitResult.Type rayTraceBlockDirect(Vec3 vec3d, Vec3 vec3d1, BlockPos blockposition, BlockState iblockdata, net.minecraft.world.phys.shapes.CollisionContext voxelshapecoll) {
+ if (iblockdata.isAir()) return null; // Tuinity - optimise air cases
+ VoxelShape voxelshape = ClipContext.Block.COLLIDER.get(iblockdata, this, blockposition, voxelshapecoll);
+ net.minecraft.world.phys.BlockHitResult movingobjectpositionblock = this.clipWithInteractionOverride(vec3d, vec3d1, blockposition, voxelshape, iblockdata);
+
+ return movingobjectpositionblock == null ? null : movingobjectpositionblock.getType();
+ }
+ // Gale end - Airplane - strip raytracing for EntityLiving#hasLineOfSight - broken down variant of below rayTraceBlock, used by World#rayTraceDirect
+
// CraftBukkit start - moved block handling into separate method for use by Block#rayTrace
default BlockHitResult clip(ClipContext raytrace1, BlockPos blockposition) {
// Paper start - Prevent raytrace from loading chunks
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index baf53980acfe52ec23b7f2f2183c2287c7b15d74..96921ace1ecc5472794df9bf4fa5fd73e9779f5c 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -409,6 +409,91 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
return null;
}
+ // Gale start - Airplane - strip raytracing for EntityLiving#hasLineOfSight - broken down method of raytracing for EntityLiving#hasLineOfSight, replaces IBlockAccess#rayTrace(RayTrace)
+ public net.minecraft.world.phys.BlockHitResult.Type rayTraceDirect(net.minecraft.world.phys.Vec3 vec3d, net.minecraft.world.phys.Vec3 vec3d1, net.minecraft.world.phys.shapes.CollisionContext voxelshapecoll) {
+ // most of this code comes from IBlockAccess#a(RayTrace, BiFunction, Function), but removes the needless functions
+ if (vec3d.equals(vec3d1)) {
+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
+ }
+
+ double endX = Mth.lerp(-1.0E-7D, vec3d1.x, vec3d.x);
+ double endY = Mth.lerp(-1.0E-7D, vec3d1.y, vec3d.y);
+ double endZ = Mth.lerp(-1.0E-7D, vec3d1.z, vec3d.z);
+
+ double startX = Mth.lerp(-1.0E-7D, vec3d.x, vec3d1.x);
+ double startY = Mth.lerp(-1.0E-7D, vec3d.y, vec3d1.y);
+ double startZ = Mth.lerp(-1.0E-7D, vec3d.z, vec3d1.z);
+
+ int currentX = Mth.floor(startX);
+ int currentY = Mth.floor(startY);
+ int currentZ = Mth.floor(startZ);
+
+ BlockPos.MutableBlockPos currentBlock = new BlockPos.MutableBlockPos(currentX, currentY, currentZ);
+
+ LevelChunk chunk = this.getChunkIfLoaded(currentBlock);
+ if (chunk == null) {
+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
+ }
+
+ net.minecraft.world.phys.BlockHitResult.Type initialCheck = this.rayTraceBlockDirect(vec3d, vec3d1, currentBlock, chunk.getBlockState(currentBlock), voxelshapecoll);
+
+ if (initialCheck != null) {
+ return initialCheck;
+ }
+
+ double diffX = endX - startX;
+ double diffY = endY - startY;
+ double diffZ = endZ - startZ;
+
+ int xDirection = Mth.sign(diffX);
+ int yDirection = Mth.sign(diffY);
+ int zDirection = Mth.sign(diffZ);
+
+ double normalizedX = xDirection == 0 ? Double.MAX_VALUE : (double) xDirection / diffX;
+ double normalizedY = yDirection == 0 ? Double.MAX_VALUE : (double) yDirection / diffY;
+ double normalizedZ = zDirection == 0 ? Double.MAX_VALUE : (double) zDirection / diffZ;
+
+ double normalizedXDirection = normalizedX * (xDirection > 0 ? 1.0D - Mth.frac(startX) : Mth.frac(startX));
+ double normalizedYDirection = normalizedY * (yDirection > 0 ? 1.0D - Mth.frac(startY) : Mth.frac(startY));
+ double normalizedZDirection = normalizedZ * (zDirection > 0 ? 1.0D - Mth.frac(startZ) : Mth.frac(startZ));
+
+ net.minecraft.world.phys.BlockHitResult.Type result;
+
+ do {
+ if (normalizedXDirection > 1.0D && normalizedYDirection > 1.0D && normalizedZDirection > 1.0D) {
+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
+ }
+
+ if (normalizedXDirection < normalizedYDirection) {
+ if (normalizedXDirection < normalizedZDirection) {
+ currentX += xDirection;
+ normalizedXDirection += normalizedX;
+ } else {
+ currentZ += zDirection;
+ normalizedZDirection += normalizedZ;
+ }
+ } else if (normalizedYDirection < normalizedZDirection) {
+ currentY += yDirection;
+ normalizedYDirection += normalizedY;
+ } else {
+ currentZ += zDirection;
+ normalizedZDirection += normalizedZ;
+ }
+
+ currentBlock.set(currentX, currentY, currentZ);
+ if (chunk.getPos().x != currentBlock.getX() >> 4 || chunk.getPos().z != currentBlock.getZ() >> 4) {
+ chunk = this.getChunkIfLoaded(currentBlock);
+ if (chunk == null) {
+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
+ }
+ }
+ result = this.rayTraceBlockDirect(vec3d, vec3d1, currentBlock, chunk.getBlockState(currentBlock), voxelshapecoll);
+ } while (result == null);
+
+ return result;
+ }
+ // Gale end - Airplane - strip raytracing for EntityLiving#hasLineOfSight - broken down method of raytracing for EntityLiving#hasLineOfSight, replaces IBlockAccess#rayTrace(RayTrace)
+
public boolean isInWorldBounds(BlockPos pos) {
return pos.isInsideBuildHeightAndWorldBoundsHorizontal(this); // Paper - use better/optimized check
}
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