UV coordinates for Mesh primitives #37879

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Brecht Van Lommel · 2013-12-19T16:24:27+01:00

Brecht Van Lommel commented

2013-12-19 16:24:27 +01:00

Currently UV unwrapping some primitives doesn't work nicely, the option to add meshes with generated UVs would be useful.

Primitives that could have this are sphere, cone, cube, etc.

Currently UV unwrapping some primitives doesn't work nicely, the option to add meshes with generated UVs would be useful. Primitives that could have this are sphere, cone, cube, etc.

Brecht Van Lommel commented

2013-12-19 16:24:27 +01:00

Changed status to: 'Open'

Brecht Van Lommel commented

2013-12-19 16:24:27 +01:00

Added subscriber: @brecht

michael knubben commented

2014-01-13 22:02:30 +01:00

Added subscriber: @michaelknubben

michael knubben commented

2014-01-13 22:02:30 +01:00

This would be very, very useful.
Another place where auto-generated UV's make sense is on a path/bezier with Bevel above 0. I often use this for quick pipes, and wish I wouldn't have to convert to a mesh to unwrap. Not only is it destructive, but it's actually a somewhat tedious shape to unwrap perfectly straight.

This would be very, very useful. Another place where auto-generated UV's make sense is on a path/bezier with Bevel above 0. I often use this for quick pipes, and wish I wouldn't have to convert to a mesh to unwrap. Not only is it destructive, but it's actually a somewhat tedious shape to unwrap perfectly straight.

Kévin Dietrich commented

2014-01-17 03:55:42 +01:00

Added subscriber: @kevindietrich

Kévin Dietrich commented

2014-01-17 03:55:42 +01:00

HI,

What are exactly the files to change ? From looking at the source, changes are to be made to source/blender/editors/mesh/editmesh_add.c, right ? I believe source/blender/editors/uvedit/uvedit_unwrap_ops.c should be referenced at some point too.

If someone could point me in the right direction, that'd be lovely.

HI, What are exactly the files to change ? From looking at the source, changes are to be made to `source/blender/editors/mesh/editmesh_add.c`, right ? I believe `source/blender/editors/uvedit/uvedit_unwrap_ops.c` should be referenced at some point too. If someone could point me in the right direction, that'd be lovely. ```

Brecht Van Lommel commented

2014-01-17 14:19:13 +01:00

The option to add such UV coordinates should be added to the operators in source/blender/editors/mesh/editmesh_add.c.
The actual implementation should be in source/blender/bmesh/operators/bmo_primitive.c.
For reference on how to add UV coordinates to a mesh, source/blender/editors/uvedit/uvedit_unwrap_ops.c can be used, though it probably wouldn't be called directly.

The option to add such UV coordinates should be added to the operators in `source/blender/editors/mesh/editmesh_add.c`. The actual implementation should be in `source/blender/bmesh/operators/bmo_primitive.c`. For reference on how to add UV coordinates to a mesh, `source/blender/editors/uvedit/uvedit_unwrap_ops.c` can be used, though it probably wouldn't be called directly.

Marcelo Varanda commented

2014-01-22 19:24:08 +01:00

Added subscriber: @MarceloVaranda

Kévin Dietrich self-assigned this 2014-01-28 17:37:56 +01:00

Paolo Acampora commented

2014-02-08 16:48:50 +01:00

Added subscriber: @PaoloAcampora

Kévin Dietrich removed their assignment 2014-03-13 15:32:16 +01:00

Tanel Tagaväli commented

2014-03-19 20:27:51 +01:00

Added subscriber: @tanel58

Tanel Tagaväli commented

2014-03-19 20:27:51 +01:00

I tried to figure this out before the Phabricator migration but was stumped after a while.
kevindietrich, if you tackled this task, please tell me what you tried, I would like to try this again.

I tried to figure this out before the Phabricator migration but was stumped after a while. kevindietrich, if you tackled this task, please tell me what you tried, I would like to try this again.

Kévin Dietrich commented

2014-03-19 21:26:32 +01:00

@tanel58: I don't recall exactly what I tried because I'm currently studying hard for cinema (if that makes sense), I've been for the past weeks between my home and Paris where I am right now with a slow laptop on Windows, so no programming on that one :). And that's the main reason why I placed this task up for grabs.

Anyway, IIRC at first I added a simple if statement to evey operator in source/blender/editors/mesh/editmesh_add.c that adds a UV texture to the object upon creation of it. Look at "ensure uvs". By doing so every object had some uvs but every vertex was in the same place.

Then, taking source/blender/editors/uvedit/uvedit_unwrap_ops.c as reference, I tried to add some conditions to the functions in source/blender/bmesh/operators/bmo_primitive.c to iter through the vertices of the mesh after those were generated to get the uvs. I don't remember the name of it but I think the main element was BM_MESH_ITER, something like that.

Again I didn't really had time to deeply look at it due to my studies in Paris which started beginning of February, so anyway, I hope that this time you'll get it to work :).

@tanel58: I don't recall exactly what I tried because I'm currently studying hard for cinema (if that makes sense), I've been for the past weeks between my home and Paris where I am right now with a slow laptop on Windows, so no programming on that one :). And that's the main reason why I placed this task up for grabs. Anyway, IIRC at first I added a simple if statement to evey operator in `source/blender/editors/mesh/editmesh_add.c` that adds a UV texture to the object upon creation of it. Look at "ensure uvs". By doing so every object had some uvs but every vertex was in the same place. Then, taking `source/blender/editors/uvedit/uvedit_unwrap_ops.c` as reference, I tried to add some conditions to the functions in `source/blender/bmesh/operators/bmo_primitive.c` to iter through the vertices of the mesh after those were generated to get the uvs. I don't remember the name of it but I think the main element was BM_MESH_ITER, something like that. Again I didn't really had time to deeply look at it due to my studies in Paris which started beginning of February, so anyway, I hope that this time you'll get it to work :).

Marcelo Varanda commented

2014-03-19 21:30:51 +01:00

Removed subscriber: @MarceloVaranda

Liam Mitchell commented

2014-04-09 09:18:33 +02:00

Added subscriber: @CommanderCorianderSalamander

Liam Mitchell commented

2014-04-09 09:23:49 +02:00

Would it be unreasonable to do this by default instead of adding it as an option? I've never done any work on Blender and this seems like it could be an okay place to start over the next couple weeks.

Tanel Tagaväli commented

2014-04-15 17:29:31 +02:00

Go ahead, I can't pick this up because I'm busy right now, but I would love to see this in Blender :)

michael knubben commented

2014-04-16 09:47:59 +02:00

Yes please!

Although eventually, I think the option should be provided when creating a primitive, primitives should have them by default.

Yes please! Although eventually, I think the option should be provided when creating a primitive, primitives should have them by default.

Kévin Dietrich commented

2014-04-16 10:21:58 +02:00

Well, in my first attempt and as far as I understood what the option was (an if statement saying "if there is no UVs, add some"), primitives had UVs by default. But I failed at getting descent UVs fore each primitive. So the option is not something you would see in the UI.

michael knubben commented

2014-04-16 14:19:18 +02:00

I'm not sure what you're saying, sorry. If you're wondering where it would be in the interface, it would be an option in the Operator Panel after primitive creation.

Liam Mitchell self-assigned this 2014-04-18 02:11:12 +02:00

Liam Mitchell commented

2014-04-18 02:11:12 +02:00

So I've been playing around with it for a few days and managed to get default UVs for cubes working ok (yay! though they could be better... but we'll get there =D) - I guess I'll take this now. Hopefully I can get things working reasonably well in the next couple weeks =) this is my first time doing anything open source at all (much less Blender) so we'll see how it goes 0o

Liam Mitchell commented

2014-04-23 22:41:22 +02:00

Patch submitted, feel free to check it out: D481 =)

Patch submitted, feel free to check it out: [D481](https://archive.blender.org/developer/D481) =)

Liam Mitchell was unassigned by Bastien Montagne

2015-12-04 23:48:42 +01:00

Bastien Montagne self-assigned this 2015-12-04 23:48:42 +01:00

blender-admin commented

2015-12-04 23:49:55 +01:00

This issue was referenced by 3c6709a63c

This issue was referenced by 3c6709a63c267dc3cb3898efd9d6466c2300876c

Bastien Montagne commented

2015-12-05 00:53:04 +01:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2015-12-05 00:53:04 +01:00

Gabriel Gazzán commented

2016-02-09 09:52:59 +01:00

Added subscriber: @GabrielGazzan

Gabriel Gazzán commented

2016-02-09 09:52:59 +01:00

I see UVs for the Sphere primitive are really not very useful.
The idea is very good, but I think you should try to improve the UV layout to really make it useful.

You can check the differences in the following images:
Current Blender UV layout: http://a.edu.uy/blender/UVsphere_blender.png
Maya UV layout: http://a.edu.uy/blender/UVsphere_maya.png

Thanks!!

I see UVs for the Sphere primitive are really not very useful. The idea is very good, but I think you should try to improve the UV layout to really make it useful. You can check the differences in the following images: Current Blender UV layout: http://a.edu.uy/blender/UVsphere_blender.png Maya UV layout: http://a.edu.uy/blender/UVsphere_maya.png Thanks!!

Carsten commented

2016-03-14 12:23:18 +01:00

Added subscriber: @CarstenWartmann

Carsten commented

2016-03-14 12:23:18 +01:00

Yep, UV not really usefull for sphere...

Carsten

Yep, UV not really usefull for sphere... Carsten

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UV coordinates for Mesh primitives #37879