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  • #19398
Closed
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Created Oct 15, 2019 by W. Alan Scott@wascottMaintainer

Lines are bleading through thin objects, Sufrace with Edges, Parallel

We are having lines bleeding through thin objects, such as the seat of a chair, parallel projection, with Surface with Edges. This was first reported here: https://discourse.paraview.org/t/surface-with-edges-representation-in-5-7/2769. Dataset in this bug works well (chair.obj), but here is another way to replicate:

  • Linux, 5.7.0, builtin server.
  • Load disk_out_ref.exo. Apply.
  • Slice filter. Apply.
  • Linear Extrusion filter. Vector == 1, 0, 0. Scale Factor == 0.2. Apply.
  • Projects/ Camera Parallel Projection.
  • Surface with Edges.

Now, by varying Scale Factor, you can see the lines on the back of the object come and go. 0.3 is worse, 0.4 is much better, but we have bleeding along the edges.

Somehow or another, in parallel projection, our coincident line code is WAY too extreme.

I checked, and Linux, 5.6.0, builtin server did NOT have this issue.

OK to slip to 5.9.0.

Edited Oct 15, 2019 by W. Alan Scott
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