point cloud to STL code - taking suggestions for features

Last week I contributed some source code which takes
a rectangular grid of digitized elevations, and outputs
an STL (surface triangulated layer) file for subsequent
conversion to gcode by other software (STLworks, Millwizard,
Deskproto, etc).

It seems to be working satisfactorily for a bunch of
folks, and while I am cleaning it up I was thinking of
incorporating some additional features that people wrote
to me wanting:

Some of the reasonable suggestions I got were:
- mirror (top-down, left-right, and inverse height)
(inverse height is to make female molds from a
digitized male object).

- axis stretching (any or all of X,Y & Z)

Does anyone else have some suggestions? (Just number
crunching suggestions please - I'm not going to make
an OpenGL renderer or make it into a mega project....).

Doug Fortune
http://www.cncKITS.com