Everyone has played Linerider [1], I want to create something similarbut with WPF

I'm workingwith theInkCanvas and i want to knowwhat built in functions that kan help me in my development.I know that you can iterate through all Strokes and their StylusPoints and then use good old fasion polygon-hitdetection butwhat i want toknow is ifthere are any built in functions for this so i don't have to re-invent the wheel?

And if not, what else in WPF can i use to simpify hit-detection(simple bool isn't enough, i need the normals and that stuff for good looking bounces). I've looked a bit on the Vector-class and it seems to contain alot of usefull functions like the dotproduct, are there more usefull controlls or classes like that?

[1]http://www.linerider.org/

There are two classes that provide hit-test functionality for ink:

System.Windows.Ink.IncrementalLassoHitTester & System.Windows.Ink.IncrementalStrokeHitTester

They are designed to enable stroke erasing and selection scenarios, though. They won't give you the normals, so it's not exactly what you are looking for.

Thanks, Stefan Wick