Add ray tracing and bounding box API

By: blablubbabc <lukas@wirsindwir.de>

paper-api/src/main/java/org/bukkit/block/BlockFace.java

@@ -1,5 +1,7 @@
 package org.bukkit.block;
 
+import org.bukkit.util.Vector;
+
 /**
  * Represents the face of a block
  */
@@ -67,6 +69,19 @@ public enum BlockFace {
         return modZ;
     }
 
+    /**
+     * Gets the normal vector corresponding to this block face.
+     *
+     * @return the normal vector
+     */
+    public Vector getDirection() {
+        Vector direction = new Vector(modX, modY, modZ);
+        if (modX != 0 || modY != 0 || modZ != 0) {
+            direction.normalize();
+        }
+        return direction;
+    }
+
     public BlockFace getOppositeFace() {
         switch (this) {
         case NORTH: