Physics Simulation Forum

i think this flag is set the object whether or not be collision.
but i have no idea that how to set the flag.

for example,i have 3 object,i want object1 can not collision with object2,
but object1 can collision object3, how can i set the flag?

thanks!

For now, please try using collisionFilterGroup/collisionFilterMask, or override the virtual 'needsCollision' in your derived version of btCollisionDispatcher.
See http://continuousphysics.com/Bullet/php ... .php?t=712

I plan on adding a 'nearCollisionCallback', for better control.
Thanks for the feedback,
Erwin

that is really good , if the nearCollisionCallback is add to Bullet,
i am very look forward to that!
thanks!