Multi-player games in HTML5 : Server Side Ball Class

Ball.js

var Ball = Class.extend({

		init : function( attachTo, isServer ) {

				//Only create meshes on the client side
			if( !isServer ) {

					//Create meshes
				this.setupBall( );

			} else {

					//Server side simulation only cares about position of the ball. 
				this.ball = {
					position : {
						x : 0, 
						y : 0
					} //position
				} //ball

			} //isServer

				//Store the speed value
			this.speed = 100;

				//Attach if requested to
			if(attachTo) {
				this.attachToPlayer( attachTo );
			}

		},


....

}); //Ball class