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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
75 lines
4.7 KiB
Diff
75 lines
4.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: TwoLeggedCat <80929284+TwoLeggedCat@users.noreply.github.com>
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Date: Sat, 29 May 2021 14:33:25 -0500
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Subject: [PATCH] Line Of Sight Changes
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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 dad6481439c54567fd6135b39c9209e74a3acba0..f7244a0cbb06258d6e553ad35e1040e338cce4eb 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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@@ -3627,7 +3627,8 @@ public abstract class LivingEntity extends Entity implements Attackable {
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Vec3 vec3d = new Vec3(this.getX(), this.getEyeY(), this.getZ());
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Vec3 vec3d1 = new Vec3(entity.getX(), entity.getEyeY(), entity.getZ());
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- return vec3d1.distanceTo(vec3d) > 128.0D ? false : this.level().clip(new ClipContext(vec3d, vec3d1, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, this)).getType() == HitResult.Type.MISS;
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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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}
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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index b9262b681b51cb68024156b28d33624fddd17b26..af14244caba22e750ee7baba03bb7ce267795b21 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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@@ -516,5 +516,21 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
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public org.bukkit.NamespacedKey getKey() {
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return org.bukkit.craftbukkit.util.CraftNamespacedKey.fromMinecraft(this.getHandle().getLevel().dimension().location());
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}
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+
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+ public boolean lineOfSightExists(Location from, Location to) {
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+ Preconditions.checkArgument(from != null, "from parameter in lineOfSightExists cannot be null");
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+ Preconditions.checkArgument(to != null, "to parameter in lineOfSightExists cannot be null");
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+ if (from.getWorld() != to.getWorld()) {
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+ return false;
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+ }
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+
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+ net.minecraft.world.phys.Vec3 start = new net.minecraft.world.phys.Vec3(from.getX(), from.getY(), from.getZ());
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+ net.minecraft.world.phys.Vec3 end = new net.minecraft.world.phys.Vec3(to.getX(), to.getY(), to.getZ());
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+ if (end.distanceToSqr(start) > 128D * 128D) {
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+ return false; // Return early if the distance is greater than 128 blocks
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+ }
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+
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+ return this.getHandle().clip(new net.minecraft.world.level.ClipContext(start, end, net.minecraft.world.level.ClipContext.Block.COLLIDER, net.minecraft.world.level.ClipContext.Fluid.NONE, net.minecraft.world.phys.shapes.CollisionContext.empty())).getType() == net.minecraft.world.phys.HitResult.Type.MISS;
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+ }
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// Paper end
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
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index aab6948060d8870729690449064b34e1b01c925e..9ce82b203e37ff1f5a7618fe864ed7616bd8d52e 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
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@@ -612,6 +612,23 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
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return this.getHandle().hasLineOfSight(((CraftEntity) other).getHandle());
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}
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+ // Paper start
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+ @Override
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+ public boolean hasLineOfSight(Location loc) {
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+ if (this.getHandle().level() != ((CraftWorld) loc.getWorld()).getHandle()) {
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+ return false;
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+ }
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+
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+ net.minecraft.world.phys.Vec3 start = new net.minecraft.world.phys.Vec3(this.getHandle().getX(), this.getHandle().getEyeY(), this.getHandle().getZ());
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+ net.minecraft.world.phys.Vec3 end = new net.minecraft.world.phys.Vec3(loc.getX(), loc.getY(), loc.getZ());
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+ if (end.distanceToSqr(start) > 128D * 128D) {
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+ return false; // Return early if the distance is greater than 128 blocks
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+ }
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+
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+ return this.getHandle().level().clipDirect(start, end, net.minecraft.world.phys.shapes.CollisionContext.of(this.getHandle())) == net.minecraft.world.phys.HitResult.Type.MISS;
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+ }
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+ // Paper end
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+
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@Override
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public boolean getRemoveWhenFarAway() {
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return this.getHandle() instanceof Mob && !((Mob) this.getHandle()).isPersistenceRequired();
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