anselm

// Note that I wrote this in java in Processing - paste this GIST into processing to see it in action.
// It is not the most elegant thing ever but it does deal with end caps and ribbon loops and the like.
// If you port this over to say objective-c / opengl / c etc - you may need to deal with polygon direction
// here is a snapshot of it running : http://www.flickr.com/photos/anselmhook/6507471719/in/photostream

int nvertices = 0;
float[] vertexpool = new float[3000];
float x1,x2,y1,y2;

void intersect(int kind, float x0, float y0, float x1,float y1,float x2,float y2,float x3,float y3,float x4,float y4) {