cuda cloth and collision operator

[usc001]

alright, so it is indeed a bit special. could be helpful maybe to have some notes in the documentation on "cloth bind operator" page ccc section.
maybe its already there and i just didnt find it, but i was searching the documentation for some info on this
thank you!

for anyone else wondering:
i ended up using surface tests in the areas where i wanted to test by collisions. its not perfect but it does the job in my setup.