[comp.graphics] 3d balls

chem4m@jetson.uh.edu (12/19/90)

I hope this isn't way out in left field but, I am actually a chemistry
major trying to write a small molecular drawing program,
I have succeeded in making it draw neat arced balls (with TP) however
I would like to know if there are any routines currently available that
will draw a round ball of arbitrary size of arbitrary color coming from
an arbitrary light source 

- This may be too complicated for a PD procedure but since so many programs
implement this kind of routine one would think that such a procedure would be
available

- Pascal would be preferable but any other language I'm sure I could hack out

thanks in advance
Chem4m.jetson.uh.edu