c++ - User defined spatial predicate within Boost Geometry -

i need determine whether interiors of 2 geometries intersect. interiorsintersect predicate not specified ogc or boost geometry defined de-9im matrix (see also):

t * * * * * * * * 

i've created own predicate using relate function in boost geometry.

namespace bgr = boost::geometry::detail::relate; using interiorsintersectmask = bgr::static_mask<'t','*','*','*','*','*','*','*','*'>;  template<typename geom1, typename geom2> inline bool interiorsintersect(const geom1& geom1, const geom2& geom2) {     return bgr::relate<interiorsintersectmask>(geom1, geom2); } 

this works great. concern relate function , static_mask type not documented part of boost geometry api , implementation details far can tell. safe use relate in way? there alternative achieving same goal using boost geometry? ideally see relate algorithm within boost/geometry/algorithms.

the relate() , relation() functions planned release in boost 1.59. interface silghtly different 1 mentioned in question:

namespace bg = boost::geometry; using ii = bg::de9im::static_mask<'t','*','*','*','*','*','*','*','*'>; bool check1 = bg::relate(geom1, geom2, ii());  bg::de9im::mask ii("t********"); bool check2 = bg::relate(geom1, geom2, ii);  bg::de9im::matrix m = bg::relation(geom1, geom2); std::cout << m.str(); 

it possible pass more complex masks:

bg::de9im::mask ii1("1********"); bg::de9im::mask ii2("2********"); // check if intersection of interiors linear or areal bool check2 = bg::relate(geom1, geom2, ii1 || ii2);