Function offsetPolyline

source/MRVoxels/MROffset.cpp:386–414

}

Expected<Mesh> offsetPolyline( const Polyline3& polyline, float offset, const OffsetParameters& params /*= {} */ )
{
    MR_TIMER;

    Mesh mesh;
    auto contours = polyline.topology.convertToContours<Vector3f>(
        [&points = polyline.points]( VertId v )
    {
        return points[v];
    } );

    std::vector<EdgeId> newHoles;
    newHoles.reserve( contours.size() );
    for ( auto& cont : contours )
    {
        if ( cont[0] != cont.back() )
            cont.insert( cont.end(), cont.rbegin(), cont.rend() );
        newHoles.push_back( mesh.addSeparateEdgeLoop( cont ) );
    }

    for ( auto h : newHoles )
        makeDegenerateBandAroundHole( mesh, h );

    // Type::Shell is more efficient in this case
    OffsetParameters p = params;
    p.signDetectionMode = SignDetectionMode::Unsigned;

    return offsetMesh( mesh, offset, p );
}

}