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Votes
0
Found in
2020.3.40f1
2021.3.9f1
2022.1.16f1
2022.2.0b8
2023.1.0a10
Issue ID
UUM-15821
Regression
No
mesh.SetVertexBufferData and mesh.SetIndices calculates bounds incorrectly when mesh.RecalculateBounds is not called
To reproduce:
1. Open the user’s project
2. Enter Play mode
3. Observe the Console
Expected result: Log “Center: (0.50, 0.50, 0.50), Extents: (0.50, 0.50, 0.50)”
Actual result: Log “Center: (0.00, 0.00, 0.00), Extents: (0.00, 0.00, 0.00)”
Reproducible with: 2020.3.40f1, 2021.3.9f1, 2022.1.16f1, 2022.2.0b8, 2023.1.0a10
Reproduced on: macOS Monterey 12.5.1 (Intel)
Workaround: Uncomment the line 71 “{{mesh.RecalculateBounds();”}} (RecalcutateBounds.cs)
Note: Reproducible in the Editor and in the Player
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Resolution Note:
The bound recalculation is done for the submesh, not the mesh. Mesh.SetIndices takes the submesh in as a parameter. The result of the recalculation can be found on the bounds of that submesh; mesh.GetSubMesh(0).bounds in this case. When printing this to the console the expected value is observed.
We have a backlog item to smooth out the behavior around mesh bounds and submesh bounds. However, we have other higher priority work at the moment.
See also:
- https://issuetracker.unity3d.com/issues/bounds-are-not-applied-to-mesh-when-using-mesh-dot-applyanddisposewritablemeshdata
- https://docs.unity3d.com/ScriptReference/Rendering.MeshUpdateFlags.DontRecalculateBounds.html