Weight/Vertex paint with mirror and viewport clipping does not update stroke on original side #81484

New Issue

Philipp Oeser · 2020-10-06T14:21:19+02:00

Philipp Oeser commented

2020-10-06 14:21:19 +02:00

System Information
Operating system: Linux-5.8.4-200.fc32.x86_64-x86_64-with-fedora-32-Thirty_Two 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.66

Blender Version
Broken: version: 2.91.0 Alpha, branch: master (modified), commit date: 2020-10-06 08:38, hash: 6e7617211b
Worked: 2.79

Short description of error
Weight/Vertex paint with mirror and viewport clipping does not update stroke on original side

Exact steps for others to reproduce the error
#81484.blend

Open .blend
Do a (weightpaint in this case) stroke on the right side --> smooth, continued stoke on the right, updates on the left as well because x-mirroring is turned ON
(Undo)
{key Alt B} a clipping region in the viewport
Do a (weightpaint in this case) stroke again on the right side --> only first dot on the right, but updates - hidden by clipping - on the left as well because x-mirroring is turned ON
{key Alt B} to clear the clipping region in the viewport, see updates on the left side

Same is true for vertexpaint.

Expected: stroke should update smooth, continued on the right side while painting.

81484.webm

**System Information** Operating system: Linux-5.8.4-200.fc32.x86_64-x86_64-with-fedora-32-Thirty_Two 64 Bits Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.66 **Blender Version** Broken: version: 2.91.0 Alpha, branch: master (modified), commit date: 2020-10-06 08:38, hash: `6e7617211b` Worked: 2.79 **Short description of error** Weight/Vertex paint with mirror and viewport clipping does not update stroke on original side **Exact steps for others to reproduce the error** [#81484.blend](https://archive.blender.org/developer/F8960805/T81484.blend) - Open .blend - Do a (weightpaint in this case) stroke on the right side --> smooth, continued stoke on the right, updates on the left as well because x-mirroring is turned ON - (Undo) - {key Alt B} a clipping region in the viewport - Do a (weightpaint in this case) stroke again on the right side --> only first dot on the right, but updates - hidden by clipping - on the left as well because x-mirroring is turned ON - {key Alt B} to clear the clipping region in the viewport, see updates on the left side Same is true for vertexpaint. Expected: stroke should update smooth, continued on the right side while painting. [81484.webm](https://archive.blender.org/developer/F8960775/81484.webm)

Philipp Oeser commented

2020-10-06 14:21:19 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-10-06 14:21:48 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser self-assigned this 2020-10-06 14:21:48 +02:00

blender-admin commented

2020-10-13 09:45:37 +02:00

This issue was referenced by 29dbe00719

This issue was referenced by 29dbe00719812925ab88030ce68509bf113520c5

Janusch Patas commented

2020-10-15 22:07:22 +02:00

Added subscriber: @patjan

Janusch Patas commented

2020-10-18 23:52:34 +02:00

Hey Philipp, I have looked a bit into this one. What I know so far, the bug seems to be unrelated to the mirroring as described. If you simply clip the upper half of the plane in the given file and start painting without mirroring, it already is buggy. You can't cross the y axis.
If you don't mind, I would like to work and help you with this one.

Hey Philipp, I have looked a bit into this one. What I know so far, the bug seems to be unrelated to the mirroring as described. If you simply clip the upper half of the plane in the given file and start painting without mirroring, it already is buggy. You can't cross the y axis. ![#81484-Clipping.png](https://archive.blender.org/developer/F9013779/T81484-Clipping.png) If you don't mind, I would like to work and help you with this one.

Philipp Oeser commented

2020-10-19 10:50:07 +02:00

Hi @patjan !
Of course, help is always welcome, however I am already half way through (at least I think I am), I just had to postpone this a bit last week to do triaging mainly.
But this is on my list for today.

Regarding your additional finding: a second pair of eyes is appreciated, however I cannot really reproduce the "second" issue you were mentioning, this is what it looks like here:
T81484_b.webm

Hi @patjan ! Of course, help is always welcome, however I am already half way through (at least I think I am), I just had to postpone this a bit last week to do triaging mainly. But this is on my list for today. Regarding your additional finding: a second pair of eyes is appreciated, however I cannot really reproduce the "second" issue you were mentioning, this is what it looks like here: [T81484_b.webm](https://archive.blender.org/developer/F9015484/T81484_b.webm)

Janusch Patas commented

2020-10-19 13:24:26 +02:00

@lichtwerk: No problem, I was aware of it that's why I asked. I try to get familiar with the code base as as side project by helping fixing bugs. Anyway, I will go for another bug then. I dont know why the clipping did not work in my case. Unfortunately I can't test it right now because I am at work. I will take another look at it tonight.

Philipp Oeser commented

2020-10-19 15:06:53 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Philipp Oeser closed this issue

2020-10-19 15:06:53 +02:00

Janusch Patas commented

2020-10-19 22:10:31 +02:00

Can't reproduce the issue anymore that I have described. Nice :)

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Weight/Vertex paint with mirror and viewport clipping does not update stroke on original side #81484