furixturi

# configure a pipe rule
sudo ipfw pipe 1 config bw 512Kbit/s delay 500ms

# add the pipe to connection in and out port 80
sudo ipfw add 1 pipe 1 src-port 80
sudo ipfw add 2 pipe 1 dst-port 80

# remove the rules and delete the pipe
sudo ipfw delete 1
sudo ipfw delete 2

furixturi

drawFrame: function(){
    		window.requestAnimationFrame(this.drawFrame, this.canvas);
		this.render();
	},

furixturi

checkCanvasSupport: function(){
    		if(!document.createElement('canvas').getContext) {
				alert("This browser dosn't support the canvas element");
				return false;
			}else{
				console.log("success!");
				return true;
			}
		},

furixturi

neutralizeAnimationFunc: function(){
    if(!window.requestAnimationFrame){
	    window.requestAnimationFrame = (window.webkitRequestAnimationFrame || 
            window.mozRequestAnimationFrame || 
            window.oRequestAnimationFrame || 
            window.msRequestAnimationFrame || 
            function(callback){
	            return window.setTimeout(callback, 1000/60);
	        });
    }

furixturi

addMouseEvents: function (){
        this.canvas.addEventListener('mousedown', function(event){
		    console.log("mouse down");
    	}, false);
    	this.canvas.addEventListener('mouseup', function(event){
    		console.log("mouse up");
    	}, false);
    }