intHexInd.resize( nbIntHex );
tbb::parallel_for ( tbb::blocked_range<size_t>( 0, nbIntHex ),
ParallelHexahedron( intersectedHex, intHexInd ),
intHexInd.resize( nbIntHex );
tbb::parallel_for ( tbb::blocked_range<size_t>( 0, nbIntHex ),
ParallelHexahedron( intersectedHex, intHexInd ),