inline bool Face_testPlane( const Face& face, const Plane3& plane, bool flipped ){
return face.contributes() && !Winding_TestPlane( face.getWinding(), plane, flipped );
}
-typedef Function3<const Face&, const Plane3&, bool, bool, Face_testPlane> FaceTestPlane;
+typedef Function<bool(const Face&, const Plane3&, bool), Face_testPlane> FaceTestPlane;