7df472527f
A long standing bug in spigot and its derivatives was the fact that players taking damage while blocking with a shield would not receive invulnerability, while they do in vanilla. This enabled the pvp technique of disabling a shield and immediately attacking again to knock a player into the air. While upstream fixed this and properly aligned itself with vanilla damage logic (in this specific case) changing such long standing behaviour has some downsides. To allow players used to this specific bug to still use it, this patch introduces a configuration option to re-introduce said bug. As there is no easy way to *only* re-add this bug, the option is found in the unsupported section as it may introduce other damage related disparity from vanilla.
159 Zeilen
8.3 KiB
Diff
159 Zeilen
8.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Paul Sauve <paul@technove.co>
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Date: Sat, 31 Oct 2020 18:43:02 -0500
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Subject: [PATCH] Strip raytracing for EntityLiving#hasLineOfSight
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The BlockGetter#clip method is very wasteful in both allocations,
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and in logic. While EntityLiving#hasLineOfSight provides static
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parameters for collisions with blocks and fluids, the method still does
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a lot of dynamic checks for both of these, which result in extra work.
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As well, since the fluid collision option is set to NONE, the entire
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fluid collision system is completely unneeded, yet used anyways.
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Copyright (C) 2020 Technove LLC
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index 45e5f14c3ad7cf25e11baa1554eb5fabac41ebe2..25a7dfddb44a11f6e20c459141a61270c0c12d4c 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -3743,7 +3743,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
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Vec3 vec3d1 = new Vec3(entity.getX(), entity.getEyeY(), entity.getZ());
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// Paper - diff on change - used in CraftLivingEntity#hasLineOfSight(Location) and CraftWorld#lineOfSightExists
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- return vec3d1.distanceToSqr(vec3d) > 128.0D * 128.0D ? false : this.level().clip(new ClipContext(vec3d, vec3d1, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, this)).getType() == HitResult.Type.MISS; // Paper - Perf: Use distance squared
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+ return vec3d1.distanceToSqr(vec3d) > 128.0D * 128.0D ? false : this.level().clipDirect(vec3d, vec3d1, net.minecraft.world.phys.shapes.CollisionContext.of(this)) == HitResult.Type.MISS; // Paper - Perf: Use distance squared & strip raytracing
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}
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}
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diff --git a/src/main/java/net/minecraft/world/level/BlockGetter.java b/src/main/java/net/minecraft/world/level/BlockGetter.java
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index bb8e962e63c7a2d931f9bd7f7c002aa35cfa5fd3..0fa131a6c98adb498fc8d534e0e39647e80c6923 100644
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--- a/src/main/java/net/minecraft/world/level/BlockGetter.java
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+++ b/src/main/java/net/minecraft/world/level/BlockGetter.java
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@@ -68,6 +68,18 @@ public interface BlockGetter extends LevelHeightAccessor {
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});
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}
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+ // Paper start - Broken down variant of the method below, used by Level#clipDirect
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+ @Nullable
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+ default BlockHitResult.Type clipDirect(Vec3 start, Vec3 end, BlockPos pos, BlockState state, net.minecraft.world.phys.shapes.CollisionContext collisionContext) {
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+ if (state.isAir()) {
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+ return null;
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+ }
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+
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+ final VoxelShape voxelshape = ClipContext.Block.COLLIDER.get(state, this, pos, collisionContext);
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+ final BlockHitResult hitResult = this.clipWithInteractionOverride(start, end, pos, voxelshape, state);
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+ return hitResult == null ? null : hitResult.getType();
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+ }
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+ // Paper end
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// CraftBukkit start - moved block handling into separate method for use by Block#rayTrace
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default BlockHitResult clip(ClipContext raytrace1, BlockPos blockposition) {
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// Paper start - Add predicate for blocks when raytracing
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diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
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index b3a433786fabf6f2cfba2cdc8d21f6447191a310..2d318964ef1f54940059b8d62bfc8f8ae87424e5 100644
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--- a/src/main/java/net/minecraft/world/level/Level.java
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+++ b/src/main/java/net/minecraft/world/level/Level.java
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@@ -386,10 +386,87 @@ public abstract class Level implements LevelAccessor, AutoCloseable, ca.spottedl
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return null;
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}
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- // Paper start
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+ // Paper start - Broken down method of raytracing for EntityLiving#hasLineOfSight, replaces BlockGetter#clip(CollisionContext)
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public net.minecraft.world.phys.BlockHitResult.Type clipDirect(Vec3 start, Vec3 end, net.minecraft.world.phys.shapes.CollisionContext context) {
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- // To be patched over
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- return this.clip(new ClipContext(start, end, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, context)).getType();
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+ // most of this code comes from BlockGetter#clip(CollisionContext, BiFunction, Function), but removes the needless functions
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+ if (start.equals(end)) {
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+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
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+ }
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+
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+ final double endX = Mth.lerp(-1.0E-7D, end.x, start.x);
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+ final double endY = Mth.lerp(-1.0E-7D, end.y, start.y);
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+ final double endZ = Mth.lerp(-1.0E-7D, end.z, start.z);
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+
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+ final double startX = Mth.lerp(-1.0E-7D, start.x, end.x);
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+ final double startY = Mth.lerp(-1.0E-7D, start.y, end.y);
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+ final double startZ = Mth.lerp(-1.0E-7D, start.z, end.z);
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+
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+ int currentX = Mth.floor(startX);
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+ int currentY = Mth.floor(startY);
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+ int currentZ = Mth.floor(startZ);
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+
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+ final BlockPos.MutableBlockPos currentBlock = new BlockPos.MutableBlockPos(currentX, currentY, currentZ);
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+
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+ LevelChunk chunk = this.getChunkIfLoaded(currentBlock);
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+ if (chunk == null) {
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+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
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+ }
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+
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+ final net.minecraft.world.phys.BlockHitResult.Type initialCheck = this.clipDirect(start, end, currentBlock, chunk.getBlockState(currentBlock), context);
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+ if (initialCheck != null) {
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+ return initialCheck;
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+ }
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+
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+ final double diffX = endX - startX;
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+ final double diffY = endY - startY;
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+ final double diffZ = endZ - startZ;
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+
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+ final int xDirection = Mth.sign(diffX);
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+ final int yDirection = Mth.sign(diffY);
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+ final int zDirection = Mth.sign(diffZ);
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+
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+ final double normalizedX = xDirection == 0 ? Double.MAX_VALUE : (double) xDirection / diffX;
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+ final double normalizedY = yDirection == 0 ? Double.MAX_VALUE : (double) yDirection / diffY;
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+ final double normalizedZ = zDirection == 0 ? Double.MAX_VALUE : (double) zDirection / diffZ;
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+
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+ double normalizedXDirection = normalizedX * (xDirection > 0 ? 1.0D - Mth.frac(startX) : Mth.frac(startX));
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+ double normalizedYDirection = normalizedY * (yDirection > 0 ? 1.0D - Mth.frac(startY) : Mth.frac(startY));
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+ double normalizedZDirection = normalizedZ * (zDirection > 0 ? 1.0D - Mth.frac(startZ) : Mth.frac(startZ));
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+
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+ net.minecraft.world.phys.BlockHitResult.Type result;
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+
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+ do {
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+ if (normalizedXDirection > 1.0D && normalizedYDirection > 1.0D && normalizedZDirection > 1.0D) {
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+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
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+ }
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+
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+ if (normalizedXDirection < normalizedYDirection) {
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+ if (normalizedXDirection < normalizedZDirection) {
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+ currentX += xDirection;
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+ normalizedXDirection += normalizedX;
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+ } else {
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+ currentZ += zDirection;
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+ normalizedZDirection += normalizedZ;
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+ }
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+ } else if (normalizedYDirection < normalizedZDirection) {
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+ currentY += yDirection;
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+ normalizedYDirection += normalizedY;
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+ } else {
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+ currentZ += zDirection;
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+ normalizedZDirection += normalizedZ;
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+ }
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+
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+ currentBlock.set(currentX, currentY, currentZ);
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+ if (chunk.getPos().x != currentBlock.getX() >> 4 || chunk.getPos().z != currentBlock.getZ() >> 4) {
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+ chunk = this.getChunkIfLoaded(currentBlock);
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+ if (chunk == null) {
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+ return net.minecraft.world.phys.BlockHitResult.Type.MISS;
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+ }
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+ }
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+ result = this.clipDirect(start, end, currentBlock, chunk.getBlockState(currentBlock), context);
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+ } while (result == null);
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+
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+ return result;
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}
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// Paper end
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