UV Editing select by patch sometimes fails #31830

New Issue

Reiner Prokein · 2012-06-14T15:08:49+02:00

Reiner Prokein commented

2012-06-14 15:08:49 +02:00

%%%r47319 Win 7, 64 Bit

I noticed that selecting by patch in the UV editing fails sometimes. It sometimes selects a neighbour patch, or doesnt select a patch at all. The attached scene has nearly every face as a single patch, im in the middle of unwrapping. I am not sure if this might even be the problem. But here it is extreme. Some patches are unselectable by that. I have to work around by using face mode.

Attached the example scene and a short flash video to show the problem%%%

%%%r47319 Win 7, 64 Bit I noticed that selecting by patch in the UV editing fails sometimes. It sometimes selects a neighbour patch, or doesn`t select a patch at all. The attached scene has nearly every face as a single patch, i`m in the middle of unwrapping. I am not sure if this might even be the problem. But here it is extreme. Some patches are unselectable by that. I have to work around by using face mode. Attached the example scene and a short flash video to show the problem%%%

Reiner Prokein commented

2012-06-14 15:08:49 +02:00

Changed status to: 'Open'

Anthony Edlin commented

2012-06-17 23:09:31 +02:00

%%%Hi Reiner,

Island selection I think works by first finding the closest vertex from where you clicked, then selecting that island. When I look at your video it seems to follow this convention. It can be confusing because you have the mouse over an island, but the closest vertex is part of a nearby island so it selects that island. If you go into face mode of UV editor on the scene you attached you can also see that it works similarly with faces, except that it first finds the closest middle of a face and then selects that face, which can also lead to times when your cursor is over a face but it selects some other nearby face whose center is closer then the face your cursor is over.

This works the same in the 3d view if you are viewing it in wireframe mode with face select, it selects faces by the closest middle of a face, not actually the face your cursor is over. In 3d view shaded mode it actually selects by which face your cursor is over. Either way, if you understand this is how it works in the UV editor you can select any island you need to.

It does seem unintuative though and could probably be fixed, but I'm not familiar with the code so would let someone else check this first. I think there is a GSoC student working on UV system this year and this might fit their responsibilities. If no one else responds for a couple of weeks I'll have a look at it when I'm not as busy.

Thanks for the report and the time making your video.%%%

%%%Hi Reiner, Island selection I think works by first finding the closest vertex from where you clicked, then selecting that island. When I look at your video it seems to follow this convention. It can be confusing because you have the mouse over an island, but the closest vertex is part of a nearby island so it selects that island. If you go into face mode of UV editor on the scene you attached you can also see that it works similarly with faces, except that it first finds the closest middle of a face and then selects that face, which can also lead to times when your cursor is over a face but it selects some other nearby face whose center is closer then the face your cursor is over. This works the same in the 3d view if you are viewing it in wireframe mode with face select, it selects faces by the closest middle of a face, not actually the face your cursor is over. In 3d view shaded mode it actually selects by which face your cursor is over. Either way, if you understand this is how it works in the UV editor you can select any island you need to. It does seem unintuative though and could probably be fixed, but I'm not familiar with the code so would let someone else check this first. I think there is a GSoC student working on UV system this year and this might fit their responsibilities. If no one else responds for a couple of weeks I'll have a look at it when I'm not as busy. Thanks for the report and the time making your video.%%%

Reiner Prokein commented

2012-06-18 09:09:47 +02:00

%%%I see. Thanks for the explanation. It is really confusing. But now i know at least where it comes from :)%%%

Sergey Sharybin commented

2012-06-18 16:06:02 +02:00

%%%This probably could be improved somehow, but wouldn't consider this is a bug.%%%

Sergey Sharybin commented

2012-06-18 16:06:02 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2012-06-18 16:06:02 +02:00

Reiner Prokein commented

2012-06-18 18:23:31 +02:00

%%%Well. I do. I want to select patches, not vertices. But it`s of course your decision :)%%%

Anthony Edlin commented

2012-06-19 03:03:25 +02:00

%%%Hi

After thinking about this a bit more and running through some actual workflows, it wouldn't make sense in uv mode to select the same way as shaded face selection in the 3d view, as sometimes in uv editor the uv's overlap on purpose, and there wouldn't be a good way to choose which should be on top.

That being said, I think it would make sense for island select mode to select by nearest vert, edge, or face, instead of just by nearest vert. This also sounds like a relatively easy patch so I wrote it up.

You can try it out here: http://projects.blender.org/tracker/index.php?func=detail&aid=31869&group_id=9&atid=127

Thanks.%%%

%%%Hi After thinking about this a bit more and running through some actual workflows, it wouldn't make sense in uv mode to select the same way as shaded face selection in the 3d view, as sometimes in uv editor the uv's overlap on purpose, and there wouldn't be a good way to choose which should be on top. That being said, I think it would make sense for island select mode to select by nearest vert, edge, or face, instead of just by nearest vert. This also sounds like a relatively easy patch so I wrote it up. You can try it out here: http://projects.blender.org/tracker/index.php?func=detail&aid=31869&group_id=9&atid=127 Thanks.%%%

Reiner Prokein commented

2012-06-19 09:02:46 +02:00

%%%This sounds like a useful approach. Thanks :)%%%

Anthony Edlin commented

2012-10-29 21:46:39 +01:00

%%%Hi,

I've updated the patch to work on trunk along with a couple of changes.

Also made a video demonstration of the patch here: https://www.youtube.com/watch?v=Vngz1JJwm1M%%%

%%%Hi, I've updated the patch to work on trunk along with a couple of changes. Also made a video demonstration of the patch here: https://www.youtube.com/watch?v=Vngz1JJwm1M%%%

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UV Editing select by patch sometimes fails #31830