hey jon,
about a cgal link - i've been thinking of it actually before qhull - but the latter proved more accessible. in a way, you/we should get an .exe from the code doing just that and then call it from gh just like qhull. it should work, but in a way i'm a bit bugged up right now. what can i say? it's definitively on my summer's to do list.

jon, probably tbe thing needs proper compiling so as to accept the input from the command line and to shout things out in stdout, but my experience is quite limited in this way - i haven't properly compiled anything in c++ since 4 years. actually that's what set me back. anyway, keep me posted, and if you need any help i can at least promise to look through it.

if you can give me an exe that wants input either from a file or from stdin and outputs in a file or in stdout then i can do the rest (providing i can properly understand the input and the output formats). i'll see what ma math wiz friend has to say also.