Method getNew2OldFaceMap

source/MRMesh/MRBooleanOperation.cpp:374–412

}

FaceMap BooleanResultMapper::getNew2OldFaceMap( MapObject obj ) const
{
    const auto& map = maps[int( obj )];
    size_t maxNewFace = 0;
    // find last "new face" for given obj part
    maxNewFace = tbb::parallel_reduce( tbb::blocked_range( size_t( 0 ), map.cut2origin.size() ), size_t( 0 ),
        [&map] ( const auto& range, auto curr )
    {
        for ( auto i = range.begin(); i < range.end(); ++i )
        {
            FaceId cf = FaceId( i );
            auto of = map.cut2origin[cf];
            if ( !of )
                continue;
            auto nf = cf < map.cut2newFaces.size() ? map.cut2newFaces[cf] : FaceId();
            if ( !nf )
                continue;
            curr = std::max( curr, size_t( nf ) );
        }
        return curr;
    }, [] ( auto a, auto b )
    {
        return std::max( a, b );
    } );

    // fill map in parallel
    FaceMap outMap( maxNewFace );
    ParallelFor( map.cut2origin, [&] ( FaceId cf )
    {
        auto of = map.cut2origin[cf];
        if ( !of )
            return;
        auto nf = cf < map.cut2newFaces.size() ? map.cut2newFaces[cf] : FaceId();
        if ( !nf )
            return;
        outMap[nf] = of;
    } );
    return outMap;
}

} //namespace MR