Graphing 3D surfaces

[Steve Bellenot <bellenot@math.fsu.edu>]

I haven't found much in the documentation about drawing general
3D surfaces. There is the Hidden object removal in the advanced
topics, of course. I'm trying to do 3D graphs. The goal is to do
at least as good as maple.

One of the common color/3D tricks is to make the color of a surface
depend on its height. Say low values are blue, high values are
red and the color blends for the points in between. Maple calls this
shading=Z, and seems to set the color for every quad
once in the postscript output file.

Are these types of things that have been done already?

-- 
Steven Bellenot                 http://www.math.fsu.edu/~bellenot
Department of Mathematics                   real.email@line.below
Florida State University                 bellenot at math.fsu.edu
Tallahassee, FL 32306-4510 USA      +1 (850) 644-7189 (FAX: 4053)