Long story short, i have a physic projectile that needs to explode when hitting everything except one rb.
Of course i could do that by messing around with collision groups, but it turned out that bullet provides a more convenient way for my use case.

Enabling CF_NO_CONTACT_RESPONSE will make the rb behave pretty much like a ghost control that is subjected to forces, the collision events will still be triggered, but it will pass through everything.

For my personal use i've just made a patch that exposes the setCollisionFlags method riccardobl@f1840b2

Seeing over the years others issues that would have been easily fixed by this, I think the engine would benefit from having a setContactResponse(boolean) method in PhysicsCollisionObject.

Thoughts?