Hi Guys:
Sorry, had to delete an earlier post.
This new version is faster, more accurate, and now knows how much material is left.
It can take a long time to generate hundreds of passes, but this is about as fast as it gets I think for this type
of algorithm.
You should find this version much more robust, and accurate, not to mention faster. Radius/Diameter is taken into account in posting as well.
Anyway, have fun,
Art