CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

The CGAL Open Source Project is pleased to announce the Release 3.9 
of CGAL, the Computational Geometry Algorithms Library.

Besides fixes to existing packages major features where added
in the following packages.

 o Combinatorial Maps (new package)

    This package provides a new combinatorial data structure allowing to
    describe any orientable subdivided object whatever its dimension.

 o 3D Convex Hull

    The quickhull implementation of CGAL (CGAL::convex_hull_3) has been worked
    out to provide much better performances

 o 2D Arrangements

    A new geometry-traits class that handles rational arcs has been
    introduced. It replaced an old traits class, which handled the same
    family of curves, but it was less efficient.

See http://www.cgal.org/releases.html for a complete list of changes.


The CGAL project is a collaborative effort to develop a robust,
easy-to-use, and efficient C++ software library of geometric data
structures and algorithms, like
- triangulations (2D constrained triangulations and Delaunay
  triangulations in 2D and 3D, periodic triangulations),
- Voronoi diagrams (for 2D and 3D points, 2D additively weighted
  Voronoi diagrams, and segment Voronoi diagrams),
- Boolean operations on polygons and polyhedra,
- regularized Boolean operations on polygons with curved arcs
- arrangements of curves,
- mesh generation (2D, 3D and surface mesh generation,
  surface mesh subdivision and parametrization),
- alpha shapes (in 2D and 3D),
- convex hull algorithms (in 2D, 3D and dD),
- operations on polygons (straight skeleton and offset polygon),
- search structures (kd trees for nearest neighbor search, and
  range and segment trees),
- interpolation (natural neighbor interpolation and placement of
  streamlines),
- optimization algorithms (smallest enclosing sphere of points or
  spheres, smallest enclosing ellipsoid of points, principal
  component analysis),
- kinetic data structures




Some modules are distributed under the terms of the LGPL Open Source
license (GNU Lesser General Public License v2.1).
Most modules are distributed under the terms of the QPL Open Source
license (Q Public License v1.0).
If your intended usage does not meet the criteria of the
aforementioned licenses, a commercial license can be purchased from
GeometryFactory (http://www.geometryfactory.com/).


For further information and for downloading the library and its
documentation, please visit the CGAL web site: http://www.cgal.org/



-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/