ODE Middleware

I’ve read the code today.
And…

Your code is brilliant, well-documented, easy to use and well done =)

I’ve understood everything =)

Ok, almost everything… I don’t understand bitMasks…
Do you know a tutorial or description which bitMask hits which and which not ^^

And is CategoryBits the incoming collision and CollisionBit for the outgoing collision… CatergoryBit for, which can hit the object and CollisionBit for what does the object hit?

Thank you very much - your code will help me realy much!

Blenderkid