Simplified CPP version of tesselate.c (now tessellate.cpp)

Code based on Michael Labbe's rip of SGI's GLU tesselator (1994!). All references to indexes removed and the interface simplified.

Having attempted triangulation with several other tessellators, such as poly2tri, this tessellator cracks all the edge cases including self-intersecting polygons and holes without the need for special support libraries such as clipper.

This tesselator is quite possibly the most versatile and robust triangulation code out there.

Soon to be converted to SDL2 as a general tessellator for all purposes.

Original ReadMe below ...

libglutess

This is a rip of the glu tesselator into a standalone library. It is a high quality tesselator with an implementation from over 20 years ago. It is still relevant today.

Features

The features of the tesselator are covered elsewhere. This documentation simply covers this release.

• tested on Linux and Mac with GCC
• tested on Windows with Visual Studio 2012
• scons-based build system
• generates a static library
• supports debug and release builds on all platforms

Compilation

 scons arch=[x86,x86-64]  debug=[0,1]

The output library's name has _d attached if it is a debug build, and 32 or 64 attached on non-fat binary platforms.

Other Changes, Gotchas

• glu.h was renamed to glutess.h in order to be unambiguous in case you have a glu.h already in your include search path.

• Superficial code changes were made to tessellate.c in order to provide Visual C compatibility.

• glutess.h contains all of the glu functions, including ones that were pruned out. If you call one, it is a link error. gluErrorString may be one of these. If you go to the trouble of adding it back in, send a patch!

Michael Labbe