Ok so basically what I'm trying to model is an ellipsoid on a plane, the planes angle can be changed by the user and the ellisoid should move accordingly. But I have absolutely no idea where to start. I've tried finding equations etc but I could't find anything other than the equation of an ellipse and I have no idea where to go now! Does anyone know what equations I should use or what method I should use or anything? Seriously stuck and just cannot get my head around how to model it, like should I be using an approximation method or what? ARGH!!