Shrinkwrap modifier confusion on linked meshes #43122

New Issue

Karja Krähwald · 2015-01-04T16:40:27+01:00

Karja Krähwald commented

2015-01-04 16:40:27 +01:00

System Information
Windows 7 64, GTX 980

Blender Version
Broken: 9e963ae + 8a28895

Short description of error
A specific modifier setup on two linked meshes changes the Shrinkwrap-modifier-target of a third/not-linked mesh, if you go into Editmode of one linked mesh.

Exact steps for others to reproduce the error
LinkedMeshShrinkwrapBug.blend

Steps:

Add two linked Cubes (Alt-D), put them on the same position.
- Subsurf-Cube
- Skin-Cube
Add another, not linked Cube, put it above the two Cubes.
- Shrinkwrap-Cube

Modifier Setup:

Assign one half of the mesh to Group.

Select Skin-Cube.
- Change back and forth between Object and Editmode.

(IMPORTANT) Problem: Shrinkwrap-Cube jumps from its target to the other linked wrong mesh.
Move vertices to see it more easily.

(NOTE) Note: Subsurf levels seem to have an influence - only higher levels enforce this bug.
To check, change simplify while in Skin-Cubes Editmode.

(NOTE) Note: I think Edge Split isnt really needed, it only increases the occurrence. (As it could also be so for the other modifiers)
But i found out for a simple example its necessary.

**System Information** Windows 7 64, GTX 980 **Blender Version** Broken: 9e963ae + 8a28895 **Short description of error** A specific modifier setup on two linked meshes changes the Shrinkwrap-modifier-target of a third/not-linked mesh, if you go into Editmode of one linked mesh. **Exact steps for others to reproduce the error** [LinkedMeshShrinkwrapBug.blend](https://archive.blender.org/developer/F135122/LinkedMeshShrinkwrapBug.blend) Steps: - Add two linked Cubes (Alt-D), put them on the same position. - Subsurf-Cube - Skin-Cube - Add another, not linked Cube, put it above the two Cubes. - Shrinkwrap-Cube Modifier Setup: ![Subsurf-Cube.png](https://archive.blender.org/developer/F135115/Subsurf-Cube.png) ![Skin-Cube.png](https://archive.blender.org/developer/F135117/Skin-Cube.png) Assign one half of the mesh to Group. ![Shrinkwrap-Cube.png](https://archive.blender.org/developer/F135119/Shrinkwrap-Cube.png) - Select Skin-Cube. - Change back and forth between Object and Editmode. (IMPORTANT) Problem: Shrinkwrap-Cube jumps from its target to the other linked wrong mesh. Move vertices to see it more easily. --------------- (NOTE) Note: Subsurf levels seem to have an influence - only higher levels enforce this bug. To check, change simplify while in Skin-Cubes Editmode. (NOTE) Note: I think Edge Split isnt really needed, it only increases the occurrence. (As it could also be so for the other modifiers) But i found out for a simple example its necessary.

Karja Krähwald commented

2015-01-04 16:40:27 +01:00

Changed status to: 'Open'

Karja Krähwald commented

2015-01-04 16:40:27 +01:00

Added subscriber: @karja

Julian Eisel commented

2015-01-05 17:40:39 +01:00

Added subscribers: @jaguarandi, @ideasman42, @JulianEisel

Julian Eisel commented

2015-01-05 17:40:39 +01:00

I checked that in code, but it doesn't seem like it's using the wrong object it more looks like the object using skin modifier isn't aware of the subsurf modifier on the other linked object. Or said differently: The shrinkwrap modifier can't access the derived mesh of the other linked object in edit mode.

@ideasman42 can you confirm that? Mind having a look? (don't think @jaguarandi is available :/)

I checked that in code, but it doesn't seem like it's using the wrong object it more looks like the object using skin modifier isn't aware of the subsurf modifier on the other linked object. Or said differently: The shrinkwrap modifier can't access the derived mesh of the other linked object in edit mode. @ideasman42 can you confirm that? Mind having a look? (don't think @jaguarandi is available :/)

Campbell Barton was assigned by Julian Eisel

2015-01-05 17:41:13 +01:00

blender-admin commented

2015-01-06 04:01:18 +01:00

This issue was referenced by 2d2bfd416b

This issue was referenced by 2d2bfd416b55233da9b8c38234ea1062bf3f9368

Campbell Barton commented

2015-01-06 04:04:54 +01:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2015-01-06 04:04:54 +01:00

Campbell Barton commented

2015-01-06 04:04:54 +01:00

Closed by commit 2d2bfd416b.

Closed by commit 2d2bfd416b.

blender-admin commented

2015-01-06 10:33:39 +01:00

This issue was referenced by 0b5a64fe7f

This issue was referenced by 0b5a64fe7f4b0e4286d7aafaa85501bf60d8576b

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Shrinkwrap modifier confusion on linked meshes #43122