= External Utilities Used by Iso2mesh Toolbox =

In this directory, you can find the precompiled binaries
that are used by iso2mesh (http://iso2mesh.sf.net). The 
names and origins of these tools are explained below:


# cgalsurf.*  - Surface Mesh Extraction Utility (built on CGAL)
# cgalmesh.*  - Volume/Surface Mesh Generation Utility (built on CGAL)
# cgalpoly.*  - Volumetric Mesh Generation Utility (built on CGAL)
# cgalsimp2.* - Surface Mesh Simplification Utility (built on CGAL)
# tetgen.*    - A Quality Tetrahedral Mesh Generator and 3D Delaunay Triangulator by Hang Si
# tetview.*   - A Mesh Graphing Utility by Hang Si
# meshfix.*   - Mesh Validation and Repairing Utility (build on JMeshLib) by Marco Attene


To distinguish binaries for different platforms, we added 
matlab mexext output for different platforms as the file
extension (except for Windows). For example, the binary
for cgalsurf on GNU Linux i386 platform is cgalsurf.mexglx,
and that for Windows is cgalsurf.exe.

Please be aware that iso2mesh communicates with these external
tools via pipes and disk files. Thus, iso2mesh and these tools
are considered as "aggregate" and they can be distributed independently
under different licenses.

Nonetheless, all of the above tools except tetgen and 
tetview are free-software (free as in free-beer and 
freedom). They are distributed under one of the 
OSI-approved open-source licenses. In the case of 
tetgen/tetview, unfortunately the license is non-free 
(based on FSF and Debian Free Software Guidelines). The 
author of tetgen/tetview permits free of use for academic 
research, but commercial use are only possible with 
explicit permission from upstream author (Hang Si).
In the event where all free-software is desired, we
recommend you choosing the "cgalmesh/cgalsurf/cgalpoly"
options provided by iso2mesh.

For other utilities, cgalsurf, cgalmesh, cgalpoly and 
cgalsimp2 were modified from CGAL 3.x and the binary are
licensed under QPL (The Q Public License v1.0 
http://www.opensource.org/licenses/qtpl). The utility
meshfix was compiled from JMeshLib and is licensed under
GPL v2 or later. The modified source codes of these utilities
are provided on the iso2mesh project management website
(gforge server) and subversion source code repository.
It is COMPLETELY the user's responsibility to use all 
external utilities (including tetgen/tetview) within the 
permissions outlined by the upstream licenses.

More detailed information regarding these tools can be found
in the last section of the README.txt file under the iso2mesh
main folder.