Appending breaks parent relations and groups #48907

New Issue

Nils Söderman · 2016-07-20T15:53:42+02:00

Nils Söderman commented

2016-07-20 15:53:42 +02:00

System Information
Windows 10, 64-bit.
NVIDIA GeForce GT 540M 1GB

Blender Version
Broken: 2.77.1, f2fa737, Date: 2016-07-20 01:25 (Running the latest Win64bit build from https://builder.blender.org/download/)
Worked: (optional)

Short description of error
When appending something seems to go wrong with groups and parent relationships.
The parent relationship and groups shows accurate it 3D view, but does not act like they should. Childs does not follow parents in movement, rotation, scale, and shows as singular objects in the outliner.
In properties > object, even though the objects in a group it's not not displayed to be part of any group in the UI, and causes some problems with python (see below).

Exact steps for others to reproduce the error

I attached a blend, contains 2 cubes with a parent relationship, and they're in a group called "Group":BlenderBug - Appending.blend

Open up Blender and import the group "Group" from the blend file.
Try to move the parent cube, child cube does not follow.
They are separate objects in outliner (cube.001 is not placed under cube), and doesn't display as part of any group.
https://i.gyazo.com/57dc8eb3b9d55ce3897974b6ad1f0849.png

Also, I assume this code doesn't work because of the problems above, but running:

import bpy
for obj in bpy.data.groups["Group"].objects:
    bpy.data.objects.remove(obj, do_unlink=True)

This should remove/delete those 2 cubes, but for some reason it doesn't if you run it after the group has been appended (works fine in original blend file).

**System Information** Windows 10, 64-bit. NVIDIA GeForce GT 540M 1GB **Blender Version** Broken: 2.77.1, f2fa737, Date: 2016-07-20 01:25 (Running the latest Win64bit build from https://builder.blender.org/download/) Worked: (optional) **Short description of error** When appending something seems to go wrong with groups and parent relationships. The parent relationship and groups shows accurate it 3D view, but does not act like they should. Childs does not follow parents in movement, rotation, scale, and shows as singular objects in the outliner. In properties > object, even though the objects in a group it's not not displayed to be part of any group in the UI, and causes some problems with python (see below). **Exact steps for others to reproduce the error** I attached a blend, contains 2 cubes with a parent relationship, and they're in a group called "Group":[BlenderBug - Appending.blend](https://archive.blender.org/developer/F325359/BlenderBug_-_Appending.blend) Open up Blender and import the group "Group" from the blend file. Try to move the parent cube, child cube does not follow. They are separate objects in outliner (cube.001 is not placed under cube), and doesn't display as part of any group. https://i.gyazo.com/57dc8eb3b9d55ce3897974b6ad1f0849.png Also, I assume this code doesn't work because of the problems above, but running: ``` import bpy for obj in bpy.data.groups["Group"].objects: bpy.data.objects.remove(obj, do_unlink=True) ``` This should remove/delete those 2 cubes, but for some reason it doesn't if you run it after the group has been appended (works fine in original blend file).

Nils Söderman commented

2016-07-20 15:53:42 +02:00

Changed status to: 'Open'

Nils Söderman commented

2016-07-20 15:53:42 +02:00

Added subscriber: @NilsSoderman

Bastien Montagne commented

2016-07-20 17:53:41 +02:00

Added subscriber: @mont29

Bastien Montagne self-assigned this 2016-07-20 17:53:41 +02:00

Bastien Montagne commented

2016-07-20 17:53:41 +02:00

Issue confirmed. Know what's happening, but not (yet) how to fix it, this is a bit of a hairy issue actually (long story made short, if parent object is made local before child one, then pointer to parent object of the child is not remapped to localized parent).

There is actually more to that, since id_make_local does not support groups (same for a few other datablock types), this has to be fixed too - arg :(

Issue confirmed. Know what's happening, but not (yet) how to fix it, this is a bit of a hairy issue actually (long story made short, if parent object is made local before child one, then pointer to parent object of the child is not remapped to localized parent). There is actually more to that, since id_make_local does not support groups (same for a few other datablock types), this has to be fixed too - arg :(

Bastien Montagne commented

2016-07-21 16:57:50 +02:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2016-07-21 16:57:50 +02:00

Bastien Montagne commented

2016-07-21 16:57:50 +02:00

Solved by d8d4bef6cc (and following) commits.

Solved by d8d4bef6cc (and following) commits.

Sybren A. Stüvel commented

2016-10-06 14:23:24 +02:00

Added subscriber: @dr.sybren

Sybren A. Stüvel commented

2016-10-06 14:23:24 +02:00

This task is still mentioned in library.c. Is that reference still valid?

This task is still mentioned [in library.c](https://developer.blender.org/diffusion/B/browse/master/source/blender/blenkernel/intern/library.c;5a0f397eaa6b5c05a6d312617eeebd96e977fa80$1697). Is that reference still valid?

Bastien Montagne commented

2016-10-06 14:40:43 +02:00

yes it is

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Appending breaks parent relations and groups #48907