[resolved] Oval collision detection - how to?

[Fox]

About the easiest thing one can do is a circular collision detection. You just calculate the distance from center to center and if the result is smaller than the summed radii the circles are colliding.

But in my game the objects have oval shadows, well basically just circles with half the height. I noticed the collision detection should match the shadows, otherwise it feels weird when playing.

So how can I check if 2 ovals are colliding? The ovals are not roated, as said before they are just half-the-height shrinked circles.

Any ideas?

Thanks, Fox