“Lattice-modifier” on another “Lattice-object” does not take the vertex group into account. #54992

New Issue

Lukas Ziechmann · 2018-05-07T17:40:04+02:00

Lukas Ziechmann commented

2018-05-07 17:40:04 +02:00

System Information
Fedora 28 / GeForce GT 740
(OS-independent issue)

Blender Version
2.79b - official release

Exact steps for others to reproduce the error
You can either use the attached blend:
bug_report_lattice_modifier_vgroup.blend
or follow these steps:

Create a Lattice-object (I) with a vertex group – exact values don’t matter as long as points have different weights
Create another Lattice-object (II) enveloping the first Lattice (I)
optional: I use a linear interpolation-type on Lattice(II) to allow for predictable transformations
Then on Lattice (I) add a “Lattice-modifier” with Lattice (II) as its target-object.
Use the specified vertex group as the modifiers influence
Enter edit-mode of Lattice(II) and transform > the specified vertex group has no effect

I know that due to the code quest the blender developers don't have much time, but as the modifier-stack is now ported to 2.8 I guess it might be urgent to fix modifier-specific bugs now, before they get wrongly ported over to 2.8, isn’t it? ( Of course I use this setup in a current project - so my reasoning here is not entirely selfless.. )

Thank you all for taking your time to look into that issue.
( special thanks to @lichtwerk for triaging so many bugs here - including mine: #54397 - your effort is appreciated! )

**System Information** Fedora 28 / GeForce GT 740 (OS-independent issue) **Blender Version** 2.79b - official release **Exact steps for others to reproduce the error** You can either use the attached blend: [bug_report_lattice_modifier_vgroup.blend](https://archive.blender.org/developer/F3297907/bug_report_lattice_modifier_vgroup.blend) or follow these steps: 1. Create a Lattice-object (I) with a vertex group – exact values don’t matter as long as points have different weights 2. Create another Lattice-object (II) enveloping the first Lattice (I) 3. optional: I use a linear interpolation-type on Lattice(II) to allow for predictable transformations 4. Then on Lattice (I) add a “Lattice-modifier” with Lattice (II) as its target-object. 5. Use the specified vertex group as the modifiers influence 6. Enter edit-mode of Lattice(II) and transform > the specified vertex group has no effect I know that due to the code quest the blender developers don't have much time, but as the modifier-stack is now ported to 2.8 I guess it might be urgent to fix modifier-specific bugs now, before they get wrongly ported over to 2.8, isn’t it? ( Of course I use this setup in a current project - so my reasoning here is not entirely selfless.. ) Thank you all for taking your time to look into that issue. ( special thanks to @lichtwerk for triaging so many bugs here - including mine: #54397 - your effort is appreciated! )

Lukas Ziechmann commented

2018-05-07 17:40:04 +02:00

Added subscribers: @lichtwerk, @LukasZiechmann

Philipp Oeser self-assigned this 2018-05-08 09:07:46 +02:00

Philipp Oeser commented

2018-05-08 09:07:46 +02:00

Will have a look shortly

Philipp Oeser commented

2018-05-08 11:00:07 +02:00

D3239 should fix this

[D3239](https://archive.blender.org/developer/D3239) should fix this

blender-admin commented

2018-05-08 11:05:42 +02:00

This issue was referenced by 69f2305415

This issue was referenced by 69f2305415a224c277fe4fa9c81f846ba60cbb17

Philipp Oeser commented

2018-05-08 11:14:24 +02:00

lattice was already ported (see #54737), so this will need to go into 2.8 with minor tweaks separately

Lukas Ziechmann commented

2018-05-08 21:01:36 +02:00

wow - getting back from work to find the bug I reported yesterday to be already fixed for 2.79. Thank you so much @lichtwerk! Regarding my other bug report: #54397 , do you think I should CC a 2.8-developers directly as the surface-deform modifier isn't ported over to 2.8 yet or would that be considered annoying/ unhelpful? I don't know the policy here and I don't want to clutter their chat with unimportant messages. Thanks again for your time and effort!

*wow* - getting back from work to find the bug I reported yesterday to be already fixed for 2.79. Thank you so much @lichtwerk! Regarding my other bug report: #54397 , do you think I should CC a 2.8-developers directly as the surface-deform modifier isn't ported over to 2.8 yet or would that be considered annoying/ unhelpful? I don't know the policy here and I don't want to clutter their chat with unimportant messages. Thanks again for your time and effort!

Philipp Oeser commented

2018-05-09 12:28:14 +02:00

@LukasZiechmann: note this isnt commited to master yet (want to check on an issue in 2.8 first so the merge would go smooth ...)
reg. #54397: surface deform is now ported as well, but changes can happen later as well [just need proper handling of 2.79 vs. 2.8], lets stick to that report and continue discussion there

@LukasZiechmann: note this isnt commited to master yet (want to check on an issue in 2.8 first so the merge would go smooth ...) reg. #54397: surface deform is now ported as well, but changes can happen later as well [just need proper handling of 2.79 vs. 2.8], lets stick to that report and continue discussion there

Philipp Oeser commented

2018-05-09 15:04:39 +02:00

Changed status from 'Open' to: 'Resolved'

Philipp Oeser closed this issue

2018-05-09 15:04:39 +02:00

Lukas Ziechmann commented

2018-05-09 21:01:03 +02:00

@lichtwerk : your work here is really aprecciated - thanks again for taking the time to fix this issue so soon!

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“Lattice-modifier” on another “Lattice-object” does not take the vertex group into account. #54992