How to make Non Colliding bodies in Box2D ?
For making non colliding bodies in Box2D, you may need to give SAME, NEGATIVE, group index to the b2FixtureDef of bodies you created. See the following code.
fixtureDefA.filter.groupIndex = -7; fixtureDefB.filter.groupIndex = -7;
The bodies with the above two fixture definitions won’t collide.