protected override void OnShapeSetContactGroup(Shape shape) { base.OnShapeSetContactGroup(shape); GeomData geomData = GetGeomDataByShape(shape); if (geomData != null) { dGeomID geomID = (geomData.transformID != dGeomID.Zero) ? geomData.transformID : geomData.geomID; Ode.SetShapeContractGroup(geomID, shape.ContactGroup); } }