Make edges of elements visible when viewed by side

Support
3

The rendering of edges on polydata was changed to a shader-based approach, resulting in much faster performance. It does have a few drawbacks, and I think you found one of them - if the polygonal face isn’t rendered in a particular view, then the edges aren’t rendered, either.

There are two things you can try (sorry, these were originally ParaView changes):

  • Set actor->GetProperty()->SetRenderLinesAsTubes(1) - It adds some depth to the edges, and may help.
  • Use the vtkExtractEdges filter on your geometry, and display the original as “surface” and the extracted edges. You’ll have to play with the display params, and possibly use the vtkMapper::SetResolveCoincidentTopologyLineOffsetParameters(XX, YY);
    to avoid depth fighting.

HTH,
Aron