Ported block tracing code to WorldEdit.

src/com/sk89q/worldedit/Vector.java

@@ -532,6 +532,20 @@ public class Vector {
                          (int)Math.floor(z));
     }
 
+    /**
+     * Get a block point from a point.
+     * 
+     * @param x
+     * @param y
+     * @param z
+     * @return point
+     */
+    public BlockVector toBlockPoint() {
+        return new BlockVector((int)Math.floor(x),
+                 (int)Math.floor(y),
+                 (int)Math.floor(z));
+    }
+
     /**
      * Checks if another object is equivalent.
      *