It all deals with triangles, it isn't that hard to comprehend I think. Get in a GeoMetry class, perhaps even a lower Algebra class would be useful. If you need some equations, I can help you guys out. It just takes a bit getting used to. ANd yes, Distance is radius, but since the people seem to need help in this area, I assumed that using more mathmatical terms was unnecessary. I said it was the distance from the centre, basically the radius
---Shifter