PaperMC/Spigot-Server-Patches/0277-Add-ray-tracing-methods-to-LivingEntity.patch

From 0000000000000000000000000000000000000000 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 83d98b705875fa543de4f37b1234ad65e4e0604a..99dac0a315c29dd394ea3e8049da89c62ace65cc 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -3474,6 +3474,23 @@ public abstract class EntityLiving extends Entity {
         this.broadcastItemBreak(enumhand == EnumHand.MAIN_HAND ? EnumItemSlot.MAINHAND : EnumItemSlot.OFFHAND);
     }
     // Paper start
+    public MovingObjectPosition getRayTrace(int maxDistance) {
+        return getRayTrace(maxDistance, RayTrace.FluidCollisionOption.NONE);
+    }
+
+    public MovingObjectPosition getRayTrace(int maxDistance, RayTrace.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());
+        RayTrace raytrace = new RayTrace(start, end, RayTrace.BlockCollisionOption.OUTLINE, fluidCollisionOption, this);
+
+        return world.rayTrace(raytrace);
+    }
+
     public int shieldBlockingDelay = world.paperConfig.shieldBlockingDelay;
 
     public int getShieldBlockingDelay() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index a91070c3674dc47e0019e642f0f76a3cf76b7387..3ec331f51bb305a82d2a12423c28d1f2e8ab8365 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -201,6 +201,28 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         return blocks.get(0);
     }
 
+    // Paper start
+    @Override
+    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 instanceof net.minecraft.server.MovingObjectPositionBlock) ? null : org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().world, ((net.minecraft.server.MovingObjectPositionBlock)rayTrace).getBlockPosition());
+    }
+
+    @Override
+    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 instanceof net.minecraft.server.MovingObjectPositionBlock) ? null : net.minecraft.server.MCUtil.toBukkitBlockFace(((net.minecraft.server.MovingObjectPositionBlock)rayTrace).getDirection());
+    }
+
+    @Override
+    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 instanceof net.minecraft.server.MovingObjectPositionBlock) ? null :
+            new com.destroystokyo.paper.block.TargetBlockInfo(org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().world, ((net.minecraft.server.MovingObjectPositionBlock)rayTrace).getBlockPosition()),
+                net.minecraft.server.MCUtil.toBukkitBlockFace(((net.minecraft.server.MovingObjectPositionBlock)rayTrace).getDirection()));
+    }
+    // Paper end
+
     @Override
     public List<Block> getLastTwoTargetBlocks(Set<Material> transparent, int maxDistance) {
         return getLineOfSight(transparent, maxDistance, 2);