_Making_VisiLibity_Work_on_Windows_+_Matlab_

The default compiler in matlab Lcc is a pure c compiler that cannot
compile c++ source code.  Also, gcc is not officiallly supported by
matlab on windows.  Syntax errors were encountered when trying to
compile with microsoft vc++ compiler which is supported by matlab.
Finally, I decided to use gcc instead of msvc. And I found an
opensource project gnumex (http://sourceforge.net/projects/gnumex/)
that can make matlab support gcc.

The solution needs some additional configurations to Matlab and tiny
modifications to the mex-prepared C source files. My software
environment is Windows XP SP3 + Matlab 7.0.1.24704(R14) SP1.  For
compiling the VisiLibity library, a Windows version gcc and an
extension of gcc support for Matlab are necessary. I use MinGW 5.1.4
(http://www.mingw.org/) and gnumex 2.01. 
Main steps I took:

1.  Compile visilibity.cpp into visilibity.o with gcc
gcc -c visilibity.cpp

3.  Install MinGW and gnumex, and config the gnumex in Matlab. The
detailed configuration instructions can be found here
http://gnumex.sourceforge.net/

4. Compile the four mex-prepared cpp files in matlab's prompt:
mex -v xxxx.cpp visilibity.o
and get the corresponding dll files

5. Run the demo .m files

I suspect the source codes can be compiled by msvc compiler.