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Nodes Group input and output default value menu is undocumented. #84978

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opened 2021-01-22 21:57:10 +01:00 by Paul Szajner · 8 comments
Paul Szajner commented 2021-01-22 21:57:10 +01:00
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System Information
Operating system: Linux-4.19.0-13-amd64-x86_64-with-debian-10.7 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.152.00

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-01-21 22:24, hash: blender/blender@e391ad7bbc
Worked: ?

Short description of error
When in a group an input is a float that we convert latter to a vector, the result is different than when we use a value input...

Exact steps for others to reproduce the error

Open the attached blend, it contains a cube with a material that showcase the bug.
When doing this it works as expected,
image.png

When using the value from the group's input it doesn't work
image.png

The .blend
Bug_Mapping.blend

**System Information** Operating system: Linux-4.19.0-13-amd64-x86_64-with-debian-10.7 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.152.00 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-01-21 22:24, hash: `blender/blender@e391ad7bbc` Worked: ? **Short description of error** When in a group an input is a float that we convert latter to a vector, the result is different than when we use a value input... **Exact steps for others to reproduce the error** Open the attached blend, it contains a cube with a material that showcase the bug. When doing this it works as expected, ![image.png](https://archive.blender.org/developer/F9592784/image.png) When using the value from the group's input it doesn't work ![image.png](https://archive.blender.org/developer/F9592789/image.png) The .blend [Bug_Mapping.blend](https://archive.blender.org/developer/F9592791/Bug_Mapping.blend)
Paul Szajner commented 2021-01-22 21:57:10 +01:00
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Added subscriber: @sozap

Added subscriber: @sozap
Paul Szajner commented 2021-01-22 22:11:28 +01:00
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Hum, by digging a bit I'm not sure if it's a bug...
In the group the default Value was set to 1, but in the value exposed "outside" the group it stayed at 0 probably because it was at 0 when the value was created.
Once I get out the group and set the value to 1 everything is working as expected.

It's a bit strange but I see why , I let the report here in case you want to address this as a papercut :
What looks logical to me is that unless you change the value "outside of the group" the value should keep the default that you set "inside the group".

Sorry for the noise !

Hum, by digging a bit I'm not sure if it's a bug... In the group the default Value was set to 1, but in the value exposed "outside" the group it stayed at 0 probably because it was at 0 when the value was created. Once I get out the group and set the value to 1 everything is working as expected. It's a bit strange but I see why , I let the report here in case you want to address this as a papercut : What looks logical to me is that unless you change the value "outside of the group" the value should keep the default that you set "inside the group". Sorry for the noise !
Evan Wilson commented 2021-01-23 19:20:23 +01:00
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Added subscriber: @EAW

Added subscriber: @EAW
Evan Wilson self-assigned this 2021-01-23 19:20:23 +01:00
Evan Wilson commented 2021-01-23 19:20:23 +01:00
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Changed status from 'Needs Triage' to: 'Confirmed'

Changed status from 'Needs Triage' to: 'Confirmed'
Evan Wilson commented 2021-01-23 19:20:23 +01:00
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I can’t seem to find a description as to what editing those values is supposed to do. So I would call this a lack of documentation issue. I’ll take a look at the code in the next few days to figure it out and add it to the manual.

https://docs.blender.org/manual/en/latest/interface/controls/nodes/groups.html

I can’t seem to find a description as to what editing those values is supposed to do. So I would call this a lack of documentation issue. I’ll take a look at the code in the next few days to figure it out and add it to the manual. https://docs.blender.org/manual/en/latest/interface/controls/nodes/groups.html
Evan Wilson changed title from Shader Nodes Group input float converted to vector act weirdly to Nodes Group input and output default value menu is undocumented. ted to act 2021-01-23 19:22:17 +01:00
Evan Wilson changed title from Nodes Group input and output default value menu is undocumented. ted to act to Nodes Group input and output default value menu is undocumented. 2021-01-23 19:23:17 +01:00
Aaron Carlisle commented 2021-02-04 06:17:44 +01:00
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Added subscriber: @Blendify

Added subscriber: @Blendify
Aaron Carlisle commented 2021-02-04 06:17:44 +01:00
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Changed status from 'Confirmed' to: 'Resolved'

Changed status from 'Confirmed' to: 'Resolved'
Aaron Carlisle commented 2021-02-04 06:17:44 +01:00
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Committed a fix as part of rBM7721

Committed a fix as part of rBM7721
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Reference: blender/blender-manual#84978
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