Mesh edges visible through a thin object - how to remove?

Support
1

Hi all,

I have a polydata object that is thin in some regions. When I show edges, the edges on the back side of the object are visible. You can see this in the attached image. This does not happen in Paraview, so I assume there is a renderer setting that will fix this.

I have tried using renderer.SetUseHiddenLineRemoval(True) and renderer.ResetCameraClippingRange() but no luck there.

Any suggestions on how to fix this?

Note: I am using VTK 9.0.1 in Python.

Cheers,
Michael

image
image2393×1516 1.2 MB

2

I believe this is due to coincident topology resolution. In C++
vtkMapper::SetResolveCoincidentTopologyToOff(); will disable it. However, some of your edges may then disappear. You can counteract this with

myActor->GetProperty()->SetRenderLinesAsTubes(1);

You can also adjust the coincident topology settings to match your data better, instead.
HTH,
Aron

3

Hi Aron,

I tried your suggestion, but unfortunately this did not help. I tried a few of the other mapper coincident topology settings, but nothing seemed to make any difference. Any other suggestions?

Cheers,
Michael