// immovable sphere with mesh collision shape
Sphere sphere = new Sphere(8, 8, 1);
Geometry sphereGeometry = new Geometry("Sphere", sphere);
sphereGeometry.setMaterial(material);
sphereGeometry.setLocalTranslation(4, -4, 2);
sphereGeometry.addControl(new RigidBodyControl(new MeshCollisionShape(sphere), 0));
rootNode.attachChild(sphereGeometry);
space.add(sphereGeometry);
}