Intersection semantics

[Rhuagh]

We should define what a border hit should do for all intersection tests.

[kvark]

One action item to take - see what other libraries are doing.
In general, I'm fine with either decision as long as it's consistent ;)

[Rhuagh]

Yeah, I tried finding information on this, but my google skills apparently aren't up to the task, and I'm not sure what open libraries there are except for ncollide.

[Rhuagh]

ncollide seems to report a hit on border intersections. It's hard to tell ...

[msiglreith]

Related point would be checking the returned values on edge cases. ncollide for example had issues at 0 penetration depth, resulting in bogus normals returned from the hit test.