Paper/patches/server/0640-Line-Of-Sight-Changes.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: TwoLeggedCat <80929284+TwoLeggedCat@users.noreply.github.com>
Date: Sat, 29 May 2021 14:33:25 -0500
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 3613422aeb87b83d04fde7341a01d4994a0a3b07..2c4d6294e1c5a0baa76d20fa5d6f95a06e73152b 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -3506,7 +3506,8 @@ public abstract class LivingEntity extends Entity implements Attackable {
Vec3 vec3d = new Vec3(this.getX(), this.getEyeY(), this.getZ());
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;
+ // 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; // Paper - use distanceToSqr
}
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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 2f35909b250584dd9def3c6e957d25ab33ca6e73..5cef05789bf04db1cc6c10bb79c7875c114f72b5 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
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@@ -975,5 +975,16 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
public org.bukkit.NamespacedKey getKey() {
return org.bukkit.craftbukkit.util.CraftNamespacedKey.fromMinecraft(this.getHandle().getLevel().dimension().location());
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}
+
+ public boolean lineOfSightExists(Location from, Location to) {
+ Preconditions.checkArgument(from != null, "from parameter in lineOfSightExists cannot be null");
+ Preconditions.checkArgument(to != null, "to parameter in lineOfSightExists cannot be null");
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+ if (from.getWorld() != to.getWorld()) return false;
+ net.minecraft.world.phys.Vec3 vec3d = new net.minecraft.world.phys.Vec3(from.getX(), from.getY(), from.getZ());
+ net.minecraft.world.phys.Vec3 vec3d1 = new net.minecraft.world.phys.Vec3(to.getX(), to.getY(), to.getZ());
+ if (vec3d1.distanceToSqr(vec3d) > 128D * 128D) return false; //Return early if the distance is greater than 128 blocks
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+
+ return this.getHandle().clip(new net.minecraft.world.level.ClipContext(vec3d, vec3d1, net.minecraft.world.level.ClipContext.Block.COLLIDER, net.minecraft.world.level.ClipContext.Fluid.NONE, null)).getType() == net.minecraft.world.phys.HitResult.Type.MISS;
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+ }
// Paper end
}
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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 d896d7089baa9c7975fc8785093e9ffd43beae39..0f6239cf279ca1a45dd9f48179cee8f66a05ef8d 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -29,6 +29,9 @@ import net.minecraft.world.entity.projectile.ThrownEgg;
import net.minecraft.world.entity.projectile.ThrownEnderpearl;
import net.minecraft.world.entity.projectile.ThrownExperienceBottle;
import net.minecraft.world.entity.projectile.ThrownTrident;
+import net.minecraft.world.level.ClipContext;
+import net.minecraft.world.phys.HitResult;
+import net.minecraft.world.phys.Vec3;
import org.apache.commons.lang.Validate;
import org.bukkit.FluidCollisionMode;
import org.bukkit.Location;
@@ -576,6 +579,18 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
return this.getHandle().hasLineOfSight(((CraftEntity) other).getHandle());
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}
+ // Paper start
+ @Override
+ public boolean hasLineOfSight(Location loc) {
+ if (this.getHandle().level != ((CraftWorld) loc.getWorld()).getHandle()) return false;
+ Vec3 vec3d = new Vec3(this.getHandle().getX(), this.getHandle().getEyeY(), this.getHandle().getZ());
+ Vec3 vec3d1 = new Vec3(loc.getX(), loc.getY(), loc.getZ());
+ if (vec3d1.distanceToSqr(vec3d) > 128D * 128D) return false; //Return early if the distance is greater than 128 blocks
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+
+ return this.getHandle().level.clip(new ClipContext(vec3d, vec3d1, ClipContext.Block.COLLIDER, ClipContext.Fluid.NONE, this.getHandle())).getType() == HitResult.Type.MISS;
+ }
+ // Paper end
+
@Override
public boolean getRemoveWhenFarAway() {
return this.getHandle() instanceof Mob && !((Mob) this.getHandle()).isPersistenceRequired();