It was suggested that I check out OpenSCAD, the programmers 3D CAD program.
As usual, for CentOS-6, it did not exist. Building it was tricky and required a bit of finesse. You can download my beta build and dependencies from http://www.chrysocome.net/download
Installation InstructionsNote: gmp 5.0 is named gmp5 so it can co-exist with the system version 4.3
Note: mpfr 3.1 is names mpfr3 so it can co-exist with the system version 2.4
yum install gmp5-5.0.5-3.el6.x86_64.rpm mpfr3-3.1.0-2.el6.x86_64.rpm CGAL-4.1-1.el6.x86_64.rpm opencsg-1.3.2-6.el6.x86_64.rpm openscad-2013.06-8.el6.x86_64.rpm --enablerepo=epel
I also need to make sure that the MCAD libraries are correctly packaged. I'll try and make an updated version soon.