I must say, i NEVER saw such an impossible tutorial like the “CollisionFilter” one (from physics examples).
I read, and read, and try, and try, everything, everything, every possible combination ... i just don’t understand NOTHING.

So….

I have

the ground:

body1

body2

and body3

And i want DISABLE COLLISION BETWEEN:
body3
and
body2

Thats AAAAAAAAAAAAAALLLLLLLLLLLLLLLL !!!!!!!!!!!!!!!

What i write ?

hello you have to use
physicsWorld.addCollisionObject(body, group:int=1, mask:int=-1 );
instead addRigidBoby

and define the good number for collision group
look AWPCollisionFlags

physicsWorld.collisionCallbackOn = true;
if you want callback

Thanks a lot . The FLAGS !! THIS IS !!
For the beginning ....The code look like this:

the ground:

body1

body2

and body3

body3
and
body2
has a “NO_CONTACT_RESPONSE : int = 4” group , and the “mask” (the only group that interacts) is group 1

but ... still to experiment.