Check out the “Advanced Pie Slicing” in the link below…
http://glbook.gamedev.net/GLBOOK/glbook.gamedev.net/moglgp/advclip.html
Check out the “Advanced Pie Slicing” in the link below…
http://glbook.gamedev.net/GLBOOK/glbook.gamedev.net/moglgp/advclip.html
This project might be related, it deals with stencils.