Thank you for your comments on the script. I use cylinders because they require the most exact control, like rotation. It is difficult to tell if a box is rotated or simply changed width and height. If a cylinder works, everything else will work also. I know there are some problems with the blender script. If you would like to help with that, tell me and I will update with some fixes I have. But my origional question was about mathematical anatimy, not blender python programming.