RenderEngine sample in 2.8 docs not fully working #64528

New Issue

Paul Melis · 2019-05-12T23:01:37+02:00

Paul Melis commented

2019-05-12 23:01:37 +02:00

System Information
Operating system: Arch Linux
Graphics card: Quadro M1000M

Blender Version
Broken: 2.80.61 (e2b60f858e)

Short description of error

See the code sample on https://docs.blender.org/api/blender2.8/bpy.types.RenderEngine.html (also attached, but changed to make the pixels to draw with GL red instead of grey):

The two calls to depsgraph.id_type_update() in CustomRenderEngine need to be changed to depsgraph.id_type_updated()
Preview rendering does not appear to work in the UI when used through blender -P blender_render_engine.docs.py (followed by switching to the Custom engine and Z->8): there's either a greyish region or white region drawn that is smaller than the 3D view. I noticed the result of texturecoord_location = bgl.glGetAttribLocation(shader_program- [x], "texCoord") in CustomDrawData.__init__() returns -1 in my tests, although I believe the attribute name is correct?

blender_render_engine.docs.py

**System Information** Operating system: Arch Linux Graphics card: Quadro M1000M **Blender Version** Broken: 2.80.61 (e2b60f858e0a) **Short description of error** See the code sample on https://docs.blender.org/api/blender2.8/bpy.types.RenderEngine.html (also attached, but changed to make the pixels to draw with GL red instead of grey): - The two calls to `depsgraph.id_type_update()` in `CustomRenderEngine` need to be changed to `depsgraph.id_type_updated()` - Preview rendering does not appear to work in the UI when used through `blender -P blender_render_engine.docs.py` (followed by switching to the Custom engine and Z->8): there's either a greyish region or white region drawn that is smaller than the 3D view. I noticed the result of `texturecoord_location = bgl.glGetAttribLocation(shader_program- [x], "texCoord")` in `CustomDrawData.__init__()` returns -1 in my tests, although I believe the attribute name is correct? [blender_render_engine.docs.py](https://archive.blender.org/developer/F7032009/blender_render_engine.docs.py)

Paul Melis commented

2019-05-12 23:01:37 +02:00

Added subscriber: @PaulMelis

Brecht Van Lommel self-assigned this 2019-05-13 22:25:45 +02:00

blender-admin commented

2019-05-23 10:28:24 +02:00

This issue was referenced by 49593a2c38

This issue was referenced by 49593a2c38f0f31869beb818f6436c96f0395803

Brecht Van Lommel commented

2019-05-23 10:33:29 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2019-05-23 10:33:29 +02:00

Brecht Van Lommel commented

2019-05-23 10:34:19 +02:00

Changed status from 'Resolved' to: 'Open'

Brecht Van Lommel reopened this issue

2019-05-23 10:34:19 +02:00

Brecht Van Lommel commented

2019-05-23 11:30:28 +02:00

I can't reproduce the viewport issue, either on Linux with Quadro RTX 6000 or macOS with Intel Iris. It shows a solid green color here.

Does it also happen with blender --factory-startup -P blender_render_engine.docs.py? Anything else that might be specific about our setup? Is this using the build from builder.blender.org?

I can't reproduce the viewport issue, either on Linux with Quadro RTX 6000 or macOS with Intel Iris. It shows a solid green color here. Does it also happen with `blender --factory-startup -P blender_render_engine.docs.py`? Anything else that might be specific about our setup? Is this using the build from builder.blender.org?

Paul Melis commented

2019-05-23 11:45:21 +02:00

Strange, the incorrect preview render indeed only happens in my locally built version (from latest git). With an official binary it works fine. The --factory-startup option makes no difference.

When I compare system-info.txt between the two I see no difference in OpenGL information, however it appears some components in my local build are missing for some reason (OpenColorIO, OpenImageIO, SDL, ...). Perhaps those interfere. I'll update my local build and try again.

Strange, the incorrect preview render indeed only happens in my locally built version (from latest git). With an official binary it works fine. The `--factory-startup` option makes no difference. When I compare system-info.txt between the two I see no difference in OpenGL information, however it appears some components in my local build are missing for some reason (OpenColorIO, OpenImageIO, SDL, ...). Perhaps those interfere. I'll update my local build and try again.

Paul Melis commented

2019-05-23 11:51:55 +02:00

Yup, appears that was the issue, render example now working fine.

Brecht Van Lommel commented

2019-05-23 12:01:52 +02:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-05-23 12:01:52 +02:00

Brecht Van Lommel commented

2019-05-23 12:01:52 +02:00

Ok, I would not consider this a bug then. Even if it would be better if this worked without OpenColorIO too, it's not really a complete build without color management.

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RenderEngine sample in 2.8 docs not fully working #64528