diff --git a/src/pixi/core/Matrix.js b/src/pixi/core/Matrix.js
index cc4ebe2..5d235ae 100644
--- a/src/pixi/core/Matrix.js
+++ b/src/pixi/core/Matrix.js
@@ -78,6 +78,23 @@
     return array;
 };
 
+PIXI.Matrix.prototype.toGlobal = function(pos)
+{
+    return {
+        x:this.a * pos.x + this.b * pos.y + this.tx,
+        y:this.c * pos.x + this.d * pos.y + this.ty
+    };
+};
+
+PIXI.Matrix.prototype.applyInverse = function(pos)
+{
+    var id = 1 / (this.a * this.d + this.b * -this.c);
+    return {
+        x:this.d * id * pos.x + -this.b * id * pos.y + (this.ty * this.b - this.tx * this.d) * id,
+        y:this.a * id * pos.y + -this.c * id * pos.x + (-this.ty * this.a + this.tx * this.c) * id
+    };
+};
+
 PIXI.identityMatrix = new PIXI.Matrix();
 
 PIXI.determineMatrixArrayType = function() {