Vertex alpha painting #42686

New Issue

Fabio Arnold · 2014-11-22T12:49:36+01:00

Fabio Arnold commented

2014-11-22 12:49:36 +01:00

I created a patch which enables editing the alpha channel of vertex colors in the vertex paint mode. For this I had to extend the MeshColor and MeshLoopColor to four channels to store alpha values. Then I introduced another blend mode (set alpha) to the vertex paint editor. I used Brush.alpha (which is also used for intensity and pen pressure I guess) for setting the alpha values instead of extending Brush.rgb to Brush.rgba which I tried first but noticed it was too much trouble.
I implemented OpenGL rendering for solid and textured shading for immediate and VBO mode. But because of transparency I still need to sort the triangles depending on the view. Does functionality already exists which I could use for that?

vertex_alpha_painting.diff

I created a patch which enables editing the alpha channel of vertex colors in the vertex paint mode. For this I had to extend the MeshColor and MeshLoopColor to four channels to store alpha values. Then I introduced another blend mode (set alpha) to the vertex paint editor. I used Brush.alpha (which is also used for intensity and pen pressure I guess) for setting the alpha values instead of extending Brush.rgb to Brush.rgba which I tried first but noticed it was too much trouble. I implemented OpenGL rendering for solid and textured shading for immediate and VBO mode. But because of transparency I still need to sort the triangles depending on the view. Does functionality already exists which I could use for that? [vertex_alpha_painting.diff](https://archive.blender.org/developer/F125369/vertex_alpha_painting.diff)

Fabio Arnold commented

2014-11-22 12:49:36 +01:00

Changed status to: 'Open'

Fabio Arnold commented

2014-11-22 12:49:36 +01:00

Added subscriber: @donfabio

Fabio Arnold commented

2014-11-22 12:57:15 +01:00

Here's the diff: https://developer.blender.org/D911

I also created a video to demonstrate the functionality: http://fabioarnold.de/videos/vertex-alpha-painting.mov

Here's the diff: https://developer.blender.org/D911 I also created a video to demonstrate the functionality: http://fabioarnold.de/videos/vertex-alpha-painting.mov

Julian Eisel commented

2014-11-24 17:54:04 +01:00

Added subscriber: @JulianEisel

Przemyslaw Golab (SirPigeonz) commented

2015-01-10 12:26:38 +01:00

Added subscriber: @SirPigeonz

Przemyslaw Golab (SirPigeonz) commented

2015-01-10 12:26:38 +01:00

I would love to see this in master it would help a lot in my current project.

Please merge it.

I would love to see this in master it would help a lot in my current project. Please merge it.

Campbell Barton commented

2015-02-25 12:38:17 +01:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2015-02-25 12:38:17 +01:00

Campbell Barton self-assigned this 2015-02-25 12:38:17 +01:00

Campbell Barton commented

2015-02-25 12:38:17 +01:00

Prefer not to keep both task & diff open unless there is really need for design-discussion / code-review separation.

In this case prefer to keep discussion in the differential.

Prefer not to keep both task & diff open unless there is really need for design-discussion / code-review separation. In this case prefer to keep discussion in the differential.

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Vertex alpha painting #42686