UV Editor Constrain-To-Bounds problem on unusual input file #102923
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Reference: blender/blender#102923
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System Information
Operating system:Win11
Version 21H12
Graphics card: NVIDIA GeForce RTX3070
Blender Version
Broken: 3.3 to 3.3.1
Worked: to 3.0
Short description of error
UV Editor is not working properly
Exact steps for others to reproduce the error
https://youtu.be/hCkmkGJgAzk UVBug.blend
Enable UV Editor > Header menu UV > Constrain to Image Bounds
Change the pivot point to 2D Cursor
Align the UV to the lower left corner
Scale cannot be changed
It will be 0,0,1
This does not always happen
Added subscriber: @BuuGraphic
Added subscriber: @mod_moder
Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'
I couldn't achieve this in a clean project. But it works in the example file. Suspicion that there are close to 0, but negative values. And because of this, the link does not work.
Why is that?
Please watch the video
https://youtu.be/hCkmkGJgAzk?t=25
The first half works fine (3.0)
The second half does not work (3.3)
The Blender used here is
I have enabled File > Default > Load factory settings
In other words, no add-ons and settings have been changed
I say I endorse your report. But if you click on the fields where 0 is written, then most likely there will be something -435235e16, that is, a very small number. And often negative.
I see thank you!
Sorry... I misunderstood what you meant by "link does not work
https://youtu.be/of-E4yH8SyM
More report
There seems to be a bug in the UV editor that causes the scale to go to 0 and the aspect ratio to be fixed even when it is not
However, this is not an inconvenient bug and maybe this feature should be kept
Could you create a "Keep Aspect Ratio" checkbox in the Operator Panel so that the previous behavior is also possible?
Added subscriber: @Chris_Blackbourn
Confirmed the bug with the file supplied, at least one of the U co-ordinates is a tiny negative number.
Interestingly, if you export the mesh as an .OBJ, then import it straight back in, the newly imported mesh works as expected.
... more investigation required ...
UV Editor is not working properlyto UV Editor Constrain-To-Bounds problem on unusual input file...WIP...
This issue was referenced by
0079460dc7Changed status from 'Needs Developer To Reproduce' to: 'Resolved'