.ArToolkitContext.baseURL + '../data/videos/headtracking.mp4',
	})
	arToolkitSource.init(function onReady(){
		onResize()
	})

	// handle resize
	window.addEventListener('resize', function(){
		onResize()
	})
	function onResize(){
		arToolkitSource.onResizeElement()
		arToolkitSource.copyElementSizeTo(renderer.domElement)
		if( arToolkitContext.arController !== null ){
			arToolkitSource.copyElementSizeTo(arToolkitContext.arController.canvas)	
		}
	}

	///////////////////////////////////////////////////////