EaselJS demo: localToLocal

 <!DOCTYPE html>
<html>
<head>
	<title>EaselJS demo: localToLocal</title>
	<link href="../shared/demo.css" rel="stylesheet" type="text/css">
	<script src="../../lib/easeljs-0.5.0.min.js"></script>
	<script>
		var stage, arm;
		function init() {
			stage = new createjs.Stage("demoCanvas");
			
			target = stage.addChild(new createjs.Shape());
			target.graphics.beginFill("red").drawCircle(0,0,45)
				.beginFill("white").drawCircle(0,0,30)
				.beginFill("red").drawCircle(0,0,15);
			target.x = 100;
			target.y = 180;
			
			arm = stage.addChild(new createjs.Shape());
			arm.graphics.beginFill("black").drawRect(-2,-2,100,4)
				.beginFill("blue").drawCircle(100,0,8);
			arm.x = 180;
			arm.y = 100;
			
			createjs.Ticker.addListener(this);
		}
		
		function tick() {
			arm.rotation += 5;
			
			target.alpha = 0.2;
			var pt = arm.localToLocal(100,0,target);
			if (target.hitTest(pt.x, pt.y)) { target.alpha = 1; }
			
			stage.update();
		}
	</script>
</head>
<body onLoad="init();">
	<canvas id="demoCanvas" width="300" height="300">
		alternate content
	</canvas>
</body>
</html>