Milestone: .Net Boolean Path Engine
Well, today I am celebrating bit of a milestone with regard to my graphics project. I finally have an operational 2D vector path engine which is capable of boolean operations. It supports union, intersection and subtraction of bezier and straight line paths with holes and seems to be working really well, at long last! One of the things that has really helped develop this engine is the vast suite of unit tests. It's amazing just how many tricky path operations you can devise that can really stress the engine. What may originally seem a relatively simple task reveals itself to have many complications with several degenerate or special cases. There have been a number of 'what if?' test cases I have thrown at the engine that have revealed areas that need to be improved. Particularly tricky problems include: subtraction of a subpath from a path, e.g. half a hexagon from a hexagon, union and subtraction operations on paths which include shared edges, paths that contain perfectly