private bool TryInformPrimOfContactChange(PhysX.ContactPairHeader contactPairHeader, PhysX.ContactPair[] pairs, int actorIndex) { PhysxPrim prim = contactPairHeader.Actors[actorIndex].UserData as PhysxPrim; if (prim != null) { prim.OnContactChangeSync(contactPairHeader, pairs, actorIndex); return(true); } else { return(false); } }