// Update the state of the orbiter when its position along the ellipse changes
// Note: Make sure the ellipse is up to date before updating the orbit state
private void Update(float orbiterAngle, Orbiter orbiter, OrbitalEllipse ellipse)
{
this.orbiter = orbiter;
this.ellipse = ellipse;
this.normal = CalcNormal(orbiterAngle);
this.tangent = CalcTangent(normal);
this.position = ellipse.GetPosition(orbiterAngle, orbiter.orbitAround.position);
this.velocity = CalcVelocity(orbiter.orbitSpeed * orbiter.GravityConstant(), position, orbiter.orbitAround.position);
}