papermc/Spigot-Server-Patches/0304-Add-ray-tracing-methods-to-LivingEntity.patch

From ce85228f0e2bb0ef8542fe11b64fa5161ab34d1c 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 8c3be17f7d..f86e7c9d4d 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -3170,6 +3170,23 @@ public abstract class EntityLiving extends Entity {
         this.c(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); // TODO review these options
+
+        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 412dd172fd..c91f6f5d22 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -170,6 +170,25 @@ 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 instanceof net.minecraft.server.MovingObjectPositionBlock) ? null : org.bukkit.craftbukkit.block.CraftBlock.at(getHandle().world, ((net.minecraft.server.MovingObjectPositionBlock)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 instanceof net.minecraft.server.MovingObjectPositionBlock) ? null : net.minecraft.server.MCUtil.toBukkitBlockFace(((net.minecraft.server.MovingObjectPositionBlock)rayTrace).getDirection());
+    }
+
+    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
+
     public List<Block> getLastTwoTargetBlocks(Set<Material> transparent, int maxDistance) {
         return getLineOfSight(transparent, maxDistance, 2);
     }
-- 
2.21.0