nmwsharp / nmwsharp/polyscope

Rendering issue with visualisation

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Dominant language
C++
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Description

Thank you for the tool,

I have been having issues with the VectorQuantities, PointClouds and CurveNetworks in that they seem to have some weird rendering artifacts. It is a bit hard to describe so I have attached a recording of it. It looks to be only rendering elements that are a fixed distance from the camera.

In the video, the expected visualisation is a crossfield on each face of the ellipse as well as normal vectors along the principal axis (essentially along the x and y).

Any suggestions for how to address this would be greatly appreciated!

https://github.com/user-attachments/assets/05dd1d50-b620-4b76-8bf8-2ff8a6bd2a6d

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Begin by reproducing the artifact with VectorQuantities, PointClouds, and CurveNetworks, using the attached recording and the expected ellipse crossfield and principal-axis vectors as reference. Trace the rendering behavior for these visualizations to isolate why only elements at a fixed camera distance appear. Done means all expected elements render consistently across camera distances.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
computer-graphics, data-visualization
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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