计算几何网络资源

1.General Polygon Clipper ,商业级质量的2D多边形,并/差/异或的算法库,支持带洞多边形,极其强大.C开源码形式
http://www.cs.man.ac.uk/~toby/alan/software/

2.Computer geometry algorism library, 以C++范型概念构架起来的几何算法库. 
http://www.cgal.org

3.The Stony Brook Algorithm Repository，以C++实现的几何算法库索引
http://www.cs.sunysb.edu/~algorith/implement/C++.shtml

4.Computational Geometry Code
http://compgeom.cs.uiuc.edu/~jeffe/compgeom/code.html

7. 图形几何问答

http://exaflop.org/docs/cgafaq/