I don't know what you are trying to acomplish but it is a consistent speed. it is doing what is supposed to do. What I am thinking is that you want it to go slower the smaller the radius is. am I correct? remove the cls from your sample and see. All of the steps are about 4 pixels apart. whether a small radius or large. if you want it to go slower/faster you need to find a factor by which to decrease/increase the speed depending on the size of the radius.
I googled the formula just to make shure I remembered it correctly:
http://www.themathpage.com/aTrig/arc-length.htm
I googled the formula just to make shure I remembered it correctly:
http://www.themathpage.com/aTrig/arc-length.htm