I need to move an object based on 100 images rotating. The object needs to move in a path that is forming an ellipse when I'm rotating the image based on my gestures. I have 4 points, 2 pairs of opposite points on X/Y axis, on the ellipse but how do I calculate the rest of the points so that I can calculate the new X/Y Value of my next/previous point? Currently I'm just rotating my object in a circle what is a start but not what I want at all... Is it possible to calculate an ellipse based on 4 opposite points? Btw - I'm a programmer but I'm not an expert in mathematics, sorry.