computational geometry for Octave

 This package contain a geometry toolbox for 2D/3D geometric computing in
 Octave, a numerical computation software. It contains several hundreds of
 functions for the creation and manipulation of 2D and 3D shapes such as
 point sets, lines, polygons, 3D meshes, ellipses, etc.
 .
 This Octave add-on package is part of the Octave-Forge project.