getCanvas().addChild(roundRect);
MTEllipse ellipse = new MTEllipse(getMTApplication(), new Vector3D(100,100,0), 160, 80);
getCanvas().addChild(ellipse);
MTCube cube = new MTCube(getMTApplication(), 150);
getCanvas().addChild(cube);
MTSphere sphere = new MTSphere(getMTApplication(), "sphere", 30,30, 130);
getCanvas().addChild(sphere);