Split up parent and gameObject defines so it's clearer and more useful

Author: photonstorm

v3/src/physics/impact/Body.js

@@ -196,9 +196,9 @@ var Body = new Class({
     //  Can be overridden by user code
     collideWith: function (other, axis)
     {
-        if (this.gameObject && this.gameObject._collideCallback)
+        if (this.parent && this.parent._collideCallback)
         {
-            this.gameObject._collideCallback.call(this.gameObject._callbackScope, this, other, axis);
+            this.parent._collideCallback.call(this.parent._callbackScope, this, other, axis);
         }
     },
 

v3/src/physics/impact/ImpactBody.js

@@ -24,6 +24,8 @@ var ImpactBody = new Class({
     {
         this.body = world.create(x, y, width, height);
 
+        this.body.parent = this;
+
         //  Local references to the Body properties
         this.size = this.body.size;
         this.offset = this.body.offset;

v3/src/physics/impact/ImpactImage.js

@@ -29,6 +29,7 @@ var ImpactImage = new Class({
 
         this.body = world.create(x - this.frame.centerX, y - this.frame.centerY, this.width, this.height);
 
+        this.body.parent = this;
         this.body.gameObject = this;
 
         //  Local references to the Body properties

v3/src/physics/impact/ImpactSprite.js

@@ -29,6 +29,7 @@ var ImpactSprite = new Class({
 
         this.body = world.create(x - this.frame.centerX, y - this.frame.centerY, this.width, this.height);
 
+        this.body.parent = this;
         this.body.gameObject = this;
 
         //  Local references to the Body properties