transform point to camera space

Author: bitnenfer

v3/src/camera/Camera.js

@@ -263,6 +263,29 @@ var Camera = new Class({
         return this;  
     },
 
+    transformPoint: function (pointIn, pointOut)
+    {
+        var cameraMatrix = this.matrix.matrix;
+        var mva = cameraMatrix[0];
+        var mvb = cameraMatrix[1];
+        var mvc = cameraMatrix[2];
+        var mvd = cameraMatrix[3];
+        var mve = cameraMatrix[4];
+        var mvf = cameraMatrix[5];
+        var x = pointIn.x;
+        var y = pointIn.y;
+
+        if (!pointOut)
+        {
+            pointOut = {x: 0, y: 0};
+        }
+
+        pointOut.x = (x * mva + y * mvc + mve) - scrollX;
+        pointOut.y = (x * mvb + y * mvd + mvf) - scrollY;
+        
+        return pointOut;
+    },
+
     preRender: function ()
     {
         var width = this.width;