Paper/Spigot-Server-Patches/0353-Add-ray-tracing-methods-to-LivingEntity.patch

From 390fed6c4568d2753e12fe3e7a80c7c00673b909 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Mon, 3 Sep 2018 18:20:03 -0500
Subject: [PATCH] Add ray tracing methods to LivingEntity


diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index c051200da8..1328f88898 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -2813,6 +2813,22 @@ public abstract class EntityLiving extends Entity {
     }
 
     // Paper start
+    public MovingObjectPosition getRayTrace(int maxDistance) {
+        return getRayTrace(maxDistance, FluidCollisionOption.NEVER);
+    }
+
+    public MovingObjectPosition getRayTrace(int maxDistance, FluidCollisionOption fluidCollisionOption) {
+        if (maxDistance < 1 || maxDistance > 120) {
+            throw new IllegalArgumentException("maxDistance must be between 1-120");
+        }
+
+        Vec3D start = new Vec3D(locX, locY + getHeadHeight(), locZ);
+        org.bukkit.util.Vector dir = getBukkitEntity().getLocation().getDirection().multiply(maxDistance);
+        Vec3D end = new Vec3D(start.x + dir.getX(), start.y + dir.getY(), start.z + dir.getZ());
+
+        return world.rayTrace(start, end, fluidCollisionOption);
+    }
+
     public int shieldBlockingDelay = world.paperConfig.shieldBlockingDelay;
 
     public int getShieldBlockingDelay() {
diff --git a/src/main/java/net/minecraft/server/MovingObjectPosition.java b/src/main/java/net/minecraft/server/MovingObjectPosition.java
index 6d5dbe89a6..a31f9f6072 100644
--- a/src/main/java/net/minecraft/server/MovingObjectPosition.java
+++ b/src/main/java/net/minecraft/server/MovingObjectPosition.java
@@ -28,6 +28,7 @@ public class MovingObjectPosition {
         this.pos = vec3d;
     }
 
+    public BlockPosition getBlockPosition() { return a(); } // Paper - OBFHELPER
     public BlockPosition a() {
         return this.e;
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index 0860f2334d..028495700f 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -169,6 +169,23 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         return blocks.get(0);
     }
 
+    // Paper start
+    public Block getTargetBlock(int maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        net.minecraft.server.MovingObjectPosition rayTrace = getHandle().getRayTrace(maxDistance, net.minecraft.server.MCUtil.getNMSFluidCollisionOption(fluidMode));
+        return rayTrace == null ? null : org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().world, rayTrace.getBlockPosition());
+    }
+
+    public org.bukkit.block.BlockFace getTargetBlockFace(int maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        net.minecraft.server.MovingObjectPosition rayTrace = getHandle().getRayTrace(maxDistance, net.minecraft.server.MCUtil.getNMSFluidCollisionOption(fluidMode));
+        return rayTrace == null ? null : net.minecraft.server.MCUtil.toBukkitBlockFace(rayTrace.direction);
+    }
+
+    public com.destroystokyo.paper.block.TargetBlockInfo getTargetBlockInfo(int maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode) {
+        net.minecraft.server.MovingObjectPosition rayTrace = getHandle().getRayTrace(maxDistance, net.minecraft.server.MCUtil.getNMSFluidCollisionOption(fluidMode));
+        return rayTrace == null ? null : new com.destroystokyo.paper.block.TargetBlockInfo(org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().world, rayTrace.getBlockPosition()), net.minecraft.server.MCUtil.toBukkitBlockFace(rayTrace.direction));
+    }
+    // Paper end
+
     public List<Block> getLastTwoTargetBlocks(Set<Material> transparent, int maxDistance) {
         return getLineOfSight(transparent, maxDistance, 2);
     }
-- 
2.19.0