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Gpencil: GPv3 interpolation sets wrong material on new keyframe #125922

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opened 2024-08-05 21:09:30 +02:00 by Aleš Jelovčan · 10 comments
Aleš Jelovčan commented 2024-08-05 21:09:30 +02:00
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System Information
Operating system: Windows-10-10.0.22631-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4090 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.32

Blender Version
Broken: version: 4.3.0 Alpha, branch: main, commit date: 2024-08-05 18:20, hash: 79ad6a3148c8
Worked: /

Short description of error
When using interpolation tool in edit mode, strokes on newly created interpolation frame have wrong material

Exact steps for others to reproduce the error
Open file attached, use interpolation tool

**System Information** Operating system: Windows-10-10.0.22631-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4090 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.32 **Blender Version** Broken: version: 4.3.0 Alpha, branch: main, commit date: 2024-08-05 18:20, hash: `79ad6a3148c8` Worked: / **Short description of error** When using interpolation tool in edit mode, strokes on newly created interpolation frame have wrong material **Exact steps for others to reproduce the error** Open file attached, use interpolation tool
interpolation_bug.blend
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Aleš Jelovčan added the
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Lukas Tönne self-assigned this 2024-08-06 09:14:31 +02:00
Pratik Borhade commented 2024-08-06 10:33:09 +02:00
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Can confirm

Can confirm
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Aleš Jelovčan commented 2024-08-23 12:23:29 +02:00
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This is still problematic. File attached. Interpolation tool is already selected so just try creating new frame with it.

This is still problematic. File attached. Interpolation tool is already selected so just try creating new frame with it.
interpolation-material-bug.blend
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Lukas Tönne commented 2024-08-23 17:56:17 +02:00
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Notes to self:

  1. Interpolate seems to discard/skip points:
    image
  2. Making all curves non-cyclic (edit mode, select all, alt+c twice) and then interpolating crashes on length calculation.
Notes to self: 1. Interpolate seems to discard/skip points: <img width="543" alt="image" src="attachments/1f5c2808-b94a-4fbb-abf2-edaaea2df583"> 2. Making all curves non-cyclic (edit mode, select all, alt+c twice) and then interpolating crashes on length calculation.
image.png
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Pratik Borhade commented 2024-08-27 09:05:48 +02:00
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Can confirm. Looking at the commit, now active material is set to the new drawing.

Can confirm. Looking at the commit, now active material is set to the new drawing.
image.png
638 KiB
image.png
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Pratik Borhade commented 2024-08-27 11:46:53 +02:00
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Maybe we can slice and copy material_index attribute array to new drawing, no?

Maybe we can slice and copy `material_index` attribute array to new drawing, no?
Pratik Borhade commented 2024-08-27 12:37:00 +02:00
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Got this working, I'll make PR 😅

Got this working, I'll make PR 😅
Pratik Borhade commented 2024-08-27 13:00:28 +02:00
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@frogstomp hi, !126832 will resolve this, can you check if it works locally in other grease pencil files?

@frogstomp hi, !126832 will resolve this, can you check if it works locally in other grease pencil files?
Aleš Jelovčan commented 2024-08-27 13:01:34 +02:00
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@PratikPB2123 sure, testing

@PratikPB2123 sure, testing
Aleš Jelovčan commented 2024-08-27 13:37:27 +02:00
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@PratikPB2123 the patch is ok. handles materials right -> takes the material from previous frame.
commit and close please :)
edit: after further testing, found crash when there is no target frame (anything right of the current frame)

@PratikPB2123 the patch is ok. handles materials right -> takes the material from previous frame. commit and close please :) edit: after further testing, found crash when there is no target frame (anything right of the current frame)
Pratik Borhade commented 2024-08-30 12:38:01 +02:00
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Thanks @frogstomp , fixed the crash.

Thanks @frogstomp , fixed the crash.
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Reference: blender/blender#125922
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