Regression: mesh.vertex_colors.active doesn't work since 3.2 #104803

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Scurest · 2023-02-16T04:01:15+01:00

Scurest commented

2023-02-16 04:01:15 +01:00

System Information
Operating system: Linux

Blender Version
Broken: 3.2 - 3.5 1beaec46b8
Worked: 3.1

Most probably caused by eae36be372

Short description of error
mesh.vertex_colors.active no longer works since 3.2 (when vertex colors changed to color attributes). It now always returns the first vertex color layer.

Noticed in this SE question.

Exact steps for others to reproduce the error
In 3.1, create a cube and add two vertex color layers. Clicking on one in the Properties window makes it active and highlighted. Run C.object.data.vertex_colors.active in the Python console and it will return whichever is active.

Open 3.2. Do the same thing (creating Byte Color + Corner color attributes). C.object.data.vertex_colors.active no longer returns the one that's active, but always returns the first.

Same is true for bmesh.loops.layers.color.active

Using the new C.object.data.color_attributes.active_color endpoint works.

**System Information** Operating system: Linux **Blender Version** Broken: 3.2 - 3.5 1beaec46b8e3 Worked: 3.1 Most probably caused by eae36be372a6 **Short description of error** `mesh.vertex_colors.active` no longer works since 3.2 (when vertex colors changed to color attributes). It now always returns the first vertex color layer. Noticed in [this SE question](https://blender.stackexchange.com/questions/286325/getting-and-using-the-selected-color-attribute). **Exact steps for others to reproduce the error** In 3.1, create a cube and add two vertex color layers. Clicking on one in the Properties window makes it active and highlighted. Run `C.object.data.vertex_colors.active` in the Python console and it will return whichever is active. Open 3.2. Do the same thing (creating Byte Color + Corner color attributes). `C.object.data.vertex_colors.active` no longer returns the one that's active, but always returns the first. Same is true for `bmesh.loops.layers.color.active` Using the new `C.object.data.color_attributes.active_color` endpoint works.

Scurest added the

labels 2023-02-16 04:01:16 +01:00

Richard Antalik commented

2023-02-16 04:26:02 +01:00

The property is marked as deprecated in docs, so will close this report.

The property is marked as deprecated in [docs](https://docs.blender.org/api/current/bpy.types.Mesh.html#bpy.types.Mesh.vertex_colors), so will close this report.

Richard Antalik closed this issue

2023-02-16 04:26:03 +01:00

Blender Bot added

and removed

labels 2023-02-16 04:26:04 +01:00

Scurest commented

2023-02-16 05:02:45 +01:00

Deprecated does not mean "is allowed to be buggy". The whole point of keeping deprecated APIs around is backwards compatibility. If you are not going to actually keep deprecated APIs functional, you should remove them outright.

Philipp Oeser commented

2023-02-16 09:38:00 +01:00

Hm, I have to agree with @scurest here, deprecated does not mean "possibly broken".

I would at least like feedback from @HooglyBoogly on this.

Hm, I have to agree with @scurest here, deprecated does not mean "possibly broken". I would at least like feedback from @HooglyBoogly on this.

Philipp Oeser reopened this issue

2023-02-16 09:38:05 +01:00

Blender Bot added

and removed

labels 2023-02-16 09:38:05 +01:00

Philipp Oeser commented

2023-02-16 09:38:44 +01:00

To get a shortterm answer, I'll even set this to High prio

Philipp Oeser changed title from ~~Python: mesh.vertex_colors.active doesn't work since 3.2~~ to Regression: mesh.vertex_colors.active doesn't work since 3.2

2023-02-16 09:39:02 +01:00

Philipp Oeser added

and removed