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Regression: STL importer "Unit Scale" bug. #125070

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opened 2024-07-19 12:56:22 +02:00 by bartus · 8 comments
bartus commented 2024-07-19 12:56:22 +02:00
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System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: Quadro K2000M/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 425.91

Blender Version
Broken: version: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: a51f293548ad
Worked: 4.1.0 (legacy STL import)

Short description of error
"Unit Scale" implementation in the new STL importer is bugged: it's reapplied instead of being reversed.

Exact steps for others to reproduce the error

  1. Start default cube scene
  2. Set "Unit Scene" to value other then '1'
  3. Export default cube to STL with "Unit Scale" option enabled
  4. Import resulting STL with "Unit Scale" enabled: it get scaled by "Unit Scale" squared.

Expected behavior
Importing STL with "Unit Scale" enabled should inverse, not reapply the scale factor.

Previous implementation reference: https://projects.blender.org/blender/blender-addons/src/commit/b42d68627734cb18af0e6f41537063984313a284/io_mesh_stl/init.py#L110
Fixed with: #124718

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: Quadro K2000M/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 425.91 **Blender Version** Broken: version: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: `a51f293548ad` Worked: 4.1.0 (legacy STL import) **Short description of error** "Unit Scale" implementation in the new STL importer is bugged: it's reapplied instead of being reversed. **Exact steps for others to reproduce the error** 1. Start default cube scene 2. Set "Unit Scene" to value other then '1' 3. Export default cube to STL with "Unit Scale" option enabled 4. Import resulting STL with "Unit Scale" enabled: it get scaled by "Unit Scale" squared. **Expected behavior** Importing STL with "Unit Scale" enabled should inverse, not reapply the scale factor. Previous implementation reference: [https://projects.blender.org/blender/blender-addons/src/commit/b42d68627734cb18af0e6f41537063984313a284/io_mesh_stl/__init__.py#L110](https://projects.blender.org/blender/blender-addons/src/commit/b42d68627734cb18af0e6f41537063984313a284/io_mesh_stl/__init__.py#L110 ) Fixed with: #124718
bartus added the
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Iliya Katushenock changed title from STL importer "Unit Scale" bug. to Regression: STL importer "Unit Scale" bug. 2024-07-19 13:16:42 +02:00
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Philipp Oeser commented 2024-07-19 13:52:48 +02:00
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Same is probably true for PLY

Same is probably true for PLY
Roman commented 2024-07-19 16:11:29 +02:00
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Same is probably true for PLY

Please add fixes to backport if them works

> Same is probably true for PLY Please add fixes to backport if them works
ply.patch
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Philipp Oeser commented 2024-07-19 16:59:30 +02:00
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Same is probably true for PLY

Please add fixes to backport if them works

This should either get added to !124718 or a new PR made, dropping a fix here as attachment will fly under the radar
See https://developer.blender.org/docs/handbook/contributing/pull_requests/

> > Same is probably true for PLY > > Please add fixes to backport if them works This should either get added to !124718 or a new PR made, dropping a fix here as attachment will fly under the radar See https://developer.blender.org/docs/handbook/contributing/pull_requests/
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Philipp Oeser commented 2024-07-22 09:12:08 +02:00
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Can confirm btw.

Can confirm btw.
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 labels 2024-07-22 09:12:33 +02:00
Jesse Yurkovich added
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bartus commented 2024-08-02 11:38:56 +02:00
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@RomanKuz-4 yep, same issue arise in ply, been wandering if other format that doesn't implement unit system should also comes with "Unit scale" option?

@RomanKuz-4 yep, same issue arise in ply, been wandering if other format that doesn't implement unit system should also comes with "Unit scale" option?
Bastien Montagne commented 2024-08-12 16:33:58 +02:00
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@deadpin are you working on that one, or do you know if anybody else is currently?

@deadpin are you working on that one, or do you know if anybody else is currently?
Jesse Yurkovich commented 2024-08-13 08:03:24 +02:00
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I'll help review and get these changes in for both STL and PLY.

I'll help review and get these changes in for both STL and PLY.
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Jesse Yurkovich commented 2024-08-13 19:26:07 +02:00
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Committed with both STL and PLY fixes and added to the backporting list. Thank you for doing the investigation and making the initial fix @bartus.

Committed with both STL and PLY fixes and added to the backporting list. Thank you for doing the investigation and making the initial fix @bartus.
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