Method prevLeftBd

source/MRMesh/MRMeshTopology.cpp:592–603

}

EdgeId MeshTopology::prevLeftBd( EdgeId e, const FaceBitSet * region, Turn turn ) const
{
    assert( isLeftBdEdge( e, region ) );

    for ( e = ( turn == Turn::Leftmost ) ? next( e ) : prev( e );
          !isLeftBdEdge( e.sym(), region );
          e = ( turn == Turn::Leftmost ) ? next( e ) : prev( e ) )
    {
        assert( !isLeftBdEdge( e, region ) );
    }
    return e.sym();
}

EdgeId MeshTopology::findEdge( VertId o, VertId d ) const
{