// Update is called every frame.
Update is called every frame.
// Update is called every frame .
func (t *Sphere) Update(a *app.App, deltaTime time.Duration) {
	t.sphere1.RotateY(0.005)
	t.normals.Update()
	t.sphere2.RotateY(-0.005)
}
func ( t * Sphere ) Update ( a * app . App , deltaTime time . Duration ) { t . sphere1 . RotateY ( 0.005 ) t . normals . Update ( ) t . sphere2 . RotateY ( - 0.005 ) }
Update is called every frame.
Update is called every frame .