CGAL users discussion list

[Dimitris Papavasiliou <>]

Hello all,

Although not written with computational geometry research in mind, this may 
still
be interesting to users of CGAL.

Gamma (https://github.com/dpapavas/gamma) was written as a sort of 
programmer's
CAD, but it is in essence a generic, high-level multi-language frontend to
(parts of) CGAL (currently mostly boolean operations (2D including
circle-segment and elliptical polygons and 3D, both Nef and corefinement 
based),
Minkowski sums, hulls, subdivision, parts of polygon mesh processing and mesh
deformation packages, but with the main infrastructure work done, adding other
operations is relatively simple).  It is designed in the form of a compiler 
that
processes source code into a sort of "CGAL assembly", performs some
optimizations and evaluates it.  It also caches intermediate results, so
incremental changes to a computation are fast and can either output to various
formats or pipe to Geomview for interactive use.

It's designed to support multiple language frontends and currently understands
Scheme and Lua.  Some examples (mostly engineering related) of its operation 
can
be found in the examples folder in the source code and a more complex
application can be found in the Orb 
(https://github.com/dpapavas/orb-trackball),
a trackball device design made with 100% CGAL.

It's currently quite stable (except for multi-threaded evaluation, which is
usable, but needs issue 6141 on CGAL's side for full support) and ready for
productive use, but lacks documentation.  I'm not sure if it can be of any
help to the typical CGAL user, but if it is, or if it can be, any sort of
comment or feedback is welcome.

Regards,
Dimitris