From 8f319b7bea415a80ddbe07e91c4a82b9026b1ba8 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <Blake.Galbreath@GMail.com>
Date: Mon, 3 Sep 2018 18:13:53 -0500
Subject: [PATCH] Add ray tracing methods to LivingEntity


diff --git a/src/main/java/com/destroystokyo/paper/block/TargetBlockInfo.java b/src/main/java/com/destroystokyo/paper/block/TargetBlockInfo.java
new file mode 100644
index 000000000..18a96dbb0
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/block/TargetBlockInfo.java
@@ -0,0 +1,54 @@
+package com.destroystokyo.paper.block;
+
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Represents information about a targeted block
+ */
+public class TargetBlockInfo {
+    private final Block block;
+    private final BlockFace blockFace;
+
+    public TargetBlockInfo(@NotNull Block block, @NotNull BlockFace blockFace) {
+        this.block = block;
+        this.blockFace = blockFace;
+    }
+
+    /**
+     * Get the block that is targeted
+     *
+     * @return Targeted block
+     */
+    @NotNull
+    public Block getBlock() {
+        return block;
+    }
+
+    /**
+     * Get the targeted BlockFace
+     *
+     * @return Targeted blockface
+     */
+    @NotNull
+    public BlockFace getBlockFace() {
+        return blockFace;
+    }
+
+    /**
+     * Get the relative Block to the targeted block on the side it is targeted at
+     *
+     * @return Block relative to targeted block
+     */
+    @NotNull
+    public Block getRelativeBlock() {
+        return block.getRelative(blockFace);
+    }
+
+    public enum FluidMode {
+        NEVER,
+        SOURCE_ONLY,
+        ALWAYS
+    }
+}
diff --git a/src/main/java/org/bukkit/entity/LivingEntity.java b/src/main/java/org/bukkit/entity/LivingEntity.java
index 4af8e680d..5e9ca6f3d 100644
--- a/src/main/java/org/bukkit/entity/LivingEntity.java
+++ b/src/main/java/org/bukkit/entity/LivingEntity.java
@@ -81,6 +81,77 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
     @NotNull
     public Block getTargetBlock(@Nullable Set<Material> transparent, int maxDistance);
 
+    // Paper start
+    /**
+     * Gets the block that the living entity has targeted, ignoring fluids
+     *
+     * @param maxDistance this is the maximum distance to scan
+     * @return block that the living entity has targeted,
+     *     or null if no block is within maxDistance
+     */
+    @Nullable
+    public default Block getTargetBlock(int maxDistance) {
+        return getTargetBlock(maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode.NEVER);
+    }
+
+    /**
+     * Gets the block that the living entity has targeted
+     *
+     * @param maxDistance this is the maximum distance to scan
+     * @param fluidMode whether to check fluids or not
+     * @return block that the living entity has targeted,
+     *     or null if no block is within maxDistance
+     */
+    @Nullable
+    public Block getTargetBlock(int maxDistance, @NotNull com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode);
+
+    /**
+     * Gets the blockface of that block that the living entity has targeted, ignoring fluids
+     *
+     * @param maxDistance this is the maximum distance to scan
+     * @return blockface of the block that the living entity has targeted,
+     *     or null if no block is targeted
+     */
+    @Nullable
+    public default org.bukkit.block.BlockFace getTargetBlockFace(int maxDistance) {
+        return getTargetBlockFace(maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode.NEVER);
+    }
+
+    /**
+     * Gets the blockface of that block that the living entity has targeted
+     *
+     * @param maxDistance this is the maximum distance to scan
+     * @param fluidMode whether to check fluids or not
+     * @return blockface of the block that the living entity has targeted,
+     *     or null if no block is targeted
+     */
+    @Nullable
+    public org.bukkit.block.BlockFace getTargetBlockFace(int maxDistance, @NotNull com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode);
+
+    /**
+     * Gets information about the block the living entity has targeted, ignoring fluids
+     *
+     * @param maxDistance this is the maximum distance to scan
+     * @return TargetBlockInfo about the block the living entity has targeted,
+     *     or null if no block is targeted
+     */
+    @Nullable
+    public default com.destroystokyo.paper.block.TargetBlockInfo getTargetBlockInfo(int maxDistance) {
+        return getTargetBlockInfo(maxDistance, com.destroystokyo.paper.block.TargetBlockInfo.FluidMode.NEVER);
+    }
+
+    /**
+     * Gets information about the block the living entity has targeted
+     *
+     * @param maxDistance this is the maximum distance to scan
+     * @param fluidMode whether to check fluids or not
+     * @return TargetBlockInfo about the block the living entity has targeted,
+     *     or null if no block is targeted
+     */
+    @Nullable
+    public com.destroystokyo.paper.block.TargetBlockInfo getTargetBlockInfo(int maxDistance, @NotNull com.destroystokyo.paper.block.TargetBlockInfo.FluidMode fluidMode);
+    // Paper end
+
     /**
      * Gets the last two blocks along the living entity's line of sight.
      * <p>
-- 
2.25.1