COG is a software package for grid generation and geometry description. It allows to generate Delaunay grids with local and anisotropic refinement for arbitrary geometries.
The volume-oriented geometry description allows to describe geometries with implicit functions, pixmaps, voxmaps, grids in a dimension-independent way. They may be combined as unions or intersections and transformed using nonlinear coordinate transformations.
Please find further information under
http://www.wias-berlin.de/publications/annual_reports/2002/cog .