EaselJS demo: globalToLocal

 <!DOCTYPE html>
<html>
<head>
	<title>EaselJS demo: globalToLocal</title>
	<link href="../shared/demo.css" rel="stylesheet" type="text/css">
	<script src="../../lib/easeljs-0.5.0.min.js"></script>
	<script>
		var stage, holder;
		function init() {
			stage = new createjs.Stage("demoCanvas");
			holder = stage.addChild(new createjs.Container());
			holder.x = holder.y = 150;
			
			for (var i=0; i<25; i++) {
				var shape = new createjs.Shape();
				shape.graphics.beginFill(createjs.Graphics.getHSL(Math.random()*360,100,50)).drawCircle(0,0,30);
				shape.x = Math.random()*300-150;
				shape.y = Math.random()*300-150;
				holder.addChild(shape); 
			}
			
			createjs.Ticker.addListener(this);
		}
		
		function tick() {
			holder.rotation += 3;
			var l = holder.getNumChildren();
			for (var i=0; i<l; i++) {
				var child = holder.getChildAt(i);
				child.alpha = 0.1;
				var pt = child.globalToLocal(stage.mouseX, stage.mouseY);
				if (stage.mouseInBounds && child.hitTest(pt.x, pt.y)) { child.alpha = 1; }
			}
			
			stage.update();
		}
	</script>
</head>
<body onLoad="init();">
	<canvas id="demoCanvas" width="300" height="300">
		alternate content
	</canvas>
</body>
</html>