Batched models visualisation error
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Description
When using custom batched models (I know it's not really supported yet, but anyway...) in Mapbox GL JS v3.2.0 I *sometimes* observe wrong triangle visualization.
Demo: https://bertt.github.io/mapbox_issues/triangles_wrong/issue/
I've got the feeling it's related to Draco compression in some geometry (couldn't isolate it more yet).
The used glTF model is visualized well in for example 3D Viewer: https://3dviewer.net/#model=https://bertt.github.io/mapbox_issues/triangles_wrong/issue/content/15-16914-10992.glb
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked demo and the provided 15-16914-10992.glb model, then compare the batched-model rendering with the 3D Viewer result. Investigate whether Draco-compressed geometry produces the incorrect triangles; done means the supplied model renders with correct triangle geometry in Mapbox GL JS.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- computer-graphics, web-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100