/////////////////////////
	//          initialize arToolkitContext
	////////////////////////////////////////////////////////////////////////////////

	// create atToolkitContext
	var arToolkitContext = new THREEx.ArToolkitContext({
		cameraParametersUrl: THREEx.ArToolkitContext.baseURL + '../data/data/camera_para.dat',
		detectionMode: 'mono',
	})
	// initialize it
	arToolkitContext.init(function onCompleted(){
		// copy projection matrix to camera
		camera.projectionMatrix.copy( arToolkitContext.getProject