I am interested in the possibilities of a CAD system built on top of a computer algebra system. I would be willing to contribute implementations of your "entities" (and associated transforms) using sympy, using the current 2d geometry module as a starting point. For adequate performance it would soon need to be ported to sympy-core or another CAS.
I'm interested in this because I like: - the accuracy that is possible with algebraic expressions even after cumulative transforms (eg. rotations) - the potential for elegant, generic implementations of geometric operations (eg. finding intersections) - the possibilities for analysing cumulative tolerancing effects - the benefits for simulation and analysis of physics problems (eg. optical systems) What do you think? -- http://mail.python.org/mailman/listinfo/python-list
