diff --git a/src/pixi/core/Matrix.js b/src/pixi/core/Matrix.js
index 6f6f748..df1fd07 100644
--- a/src/pixi/core/Matrix.js
+++ b/src/pixi/core/Matrix.js
@@ -2,27 +2,16 @@
  * @author Mat Groves http://matgroves.com/ @Doormat23
  */
 
-PIXI.determineMatrixArrayType = function() {
-    return (typeof Float32Array !== 'undefined') ? Float32Array : Array;
-};
-
-/*
-* @class Matrix2
-* The Matrix2 class will choose the best type of array to use between
-* a regular javascript Array and a Float32Array if the latter is available
-*
-*/
-PIXI.Matrix2 = PIXI.determineMatrixArrayType();
-
-/*
-* @class Matrix
-* The Matrix class is now an object, which makes it a lot faster, 
-* here is a representation of it : 
-* | a | b | tx|
-* | c | c | ty|
-* | 0 | 0 | 1 |
-*
-*/
+/**
+ * The Matrix class is now an object, which makes it a lot faster, 
+ * here is a representation of it : 
+ * | a | b | tx|
+ * | c | c | ty|
+ * | 0 | 0 | 1 |
+ *
+ * @class Matrix
+ * @constructor
+ */
 PIXI.Matrix = function()
 {
     this.a = 1;
@@ -54,7 +43,7 @@
  *
  * @method toArray
  * @param transpose {Boolean} Whether we need to transpose the matrix or not
- * @return array {Array} the newly created array which contains the matrix
+ * @return {Array} the newly created array which contains the matrix
  */
 PIXI.Matrix.prototype.toArray = function(transpose)
 {
@@ -89,4 +78,17 @@
     return array;
 };
 
-PIXI.identityMatrix = new PIXI.Matrix();
\ No newline at end of file
+PIXI.identityMatrix = new PIXI.Matrix();
+
+PIXI.determineMatrixArrayType = function() {
+    return (typeof Float32Array !== 'undefined') ? Float32Array : Array;
+};
+
+/**
+ * The Matrix2 class will choose the best type of array to use between
+ * a regular javascript Array and a Float32Array if the latter is available
+ *
+ * @class Matrix2
+ * @constructor
+ */
+PIXI.Matrix2 = PIXI.determineMatrixArrayType();

diff --git a/src/pixi/core/Matrix.js b/src/pixi/core/Matrix.js
index 6f6f748..df1fd07 100644
--- a/src/pixi/core/Matrix.js
+++ b/src/pixi/core/Matrix.js
@@ -2,27 +2,16 @@
  * @author Mat Groves http://matgroves.com/ @Doormat23
  */
 
-PIXI.determineMatrixArrayType = function() {
-    return (typeof Float32Array !== 'undefined') ? Float32Array : Array;
-};
-
-/*
-* @class Matrix2
-* The Matrix2 class will choose the best type of array to use between
-* a regular javascript Array and a Float32Array if the latter is available
-*
-*/
-PIXI.Matrix2 = PIXI.determineMatrixArrayType();
-
-/*
-* @class Matrix
-* The Matrix class is now an object, which makes it a lot faster, 
-* here is a representation of it : 
-* | a | b | tx|
-* | c | c | ty|
-* | 0 | 0 | 1 |
-*
-*/
+/**
+ * The Matrix class is now an object, which makes it a lot faster, 
+ * here is a representation of it : 
+ * | a | b | tx|
+ * | c | c | ty|
+ * | 0 | 0 | 1 |
+ *
+ * @class Matrix
+ * @constructor
+ */
 PIXI.Matrix = function()
 {
     this.a = 1;
@@ -54,7 +43,7 @@
  *
  * @method toArray
  * @param transpose {Boolean} Whether we need to transpose the matrix or not
- * @return array {Array} the newly created array which contains the matrix
+ * @return {Array} the newly created array which contains the matrix
  */
 PIXI.Matrix.prototype.toArray = function(transpose)
 {
@@ -89,4 +78,17 @@
     return array;
 };
 
-PIXI.identityMatrix = new PIXI.Matrix();
\ No newline at end of file
+PIXI.identityMatrix = new PIXI.Matrix();
+
+PIXI.determineMatrixArrayType = function() {
+    return (typeof Float32Array !== 'undefined') ? Float32Array : Array;
+};
+
+/**
+ * The Matrix2 class will choose the best type of array to use between
+ * a regular javascript Array and a Float32Array if the latter is available
+ *
+ * @class Matrix2
+ * @constructor
+ */
+PIXI.Matrix2 = PIXI.determineMatrixArrayType();
diff --git a/src/pixi/core/Point.js b/src/pixi/core/Point.js
index a3c8e5e..202bc2f 100644
--- a/src/pixi/core/Point.js
+++ b/src/pixi/core/Point.js
@@ -38,12 +38,19 @@
     return new PIXI.Point(this.x, this.y);
 };
 
-// constructor
-PIXI.Point.prototype.constructor = PIXI.Point;
-
+/**
+ * Sets the point to a new x and y position.
+ * If y is ommited, both x and y will be set to x.
+ * 
+ * @method set
+ * @param [x=0] {Number} position of the point on the x axis
+ * @param [y=0] {Number} position of the point on the y axis
+ */
 PIXI.Point.prototype.set = function(x, y)
 {
     this.x = x || 0;
     this.y = y || ( (y !== 0) ? this.x : 0 ) ;
 };
 
+// constructor
+PIXI.Point.prototype.constructor = PIXI.Point;
\ No newline at end of file