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Maniphest T43337

Group objects disappear after appending
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Description

System Information
Windows 7 64, GTX 980

Blender Version
Broken: 2.6 (unsure), 2.70 - b4d8fb5 (2.73 release), a1f4821

Short description of error
Group objects who are used as a Custom Bone Shape 2 or more times
will disappear after appending their group to a new file, regardless of any other usage.

Exact steps for others to reproduce the error

GroupAppendBug.blend718 KBDownload

Steps:

  • Add a Cube.
  • Add an Armature.
    • Create 2 Bones.
    • Use Cube as Custom Bone Shape for both Bones.
  • Assign all objects to a Group.
  • Open a new file and append this Group

Problem: Cube (object) isnt appended correctly and dont show up in your new file - only mesh data is appended.

All objects that have used Cube for any purpose (mirror-target/constraints/etc) will now refer to a hidden object.
And of course Cubes individual settings like constraints or modifiers are lost as well.

Revisions and Commits

rB Blender
rBec180218678b Fix T43337: Group object disappear after append

Related Objects

Event Timeline

Karja Krähwald (karja) created this task.Jan 21 2015, 4:14 AM
Karja Krähwald (karja) raised the priority of this task from to 90.
Karja Krähwald (karja) updated the task description. (Show Details)
Karja Krähwald (karja) added a project: BF Blender.
Karja Krähwald (karja) edited a custom field.
Karja Krähwald (karja) added a subscriber: Karja Krähwald (karja).
Lukas Tönne (lukastoenne) assigned this task to Campbell Barton (campbellbarton).Jan 21 2015, 11:24 AM
Lukas Tönne (lukastoenne) added a subscriber: Lukas Tönne (lukastoenne).

Problem seems to be this conditional when creating bases for appended objects in give_base_to_objects:

				...
				else if (idcode==ID_GR) {
					if (ob->id.us == 1 && is_link == false && ob->id.lib == lib) {
						if ((ob->flag & OB_FROMGROUP) && object_in_any_scene(mainvar, ob)==0) {
							do_it = true;
						}
					}
				}
				...

When there is only one bone shape the ob->id.us == 1 part is true and the Suzanne object gets a base, but with 2 bone shapes it fails and no other condition succeeds to give it a base.

Campbell Barton (campbellbarton) added a comment.Jan 22 2015, 6:47 AM

Looks like it could be changed to: ob->id.us >= 1. would be a reasonable fix.

Bastien Montagne (mont29) lowered the priority of this task from 90 to Normal.Jan 22 2015, 2:24 PM
Campbell Barton (campbellbarton) changed the task status from Unknown Status to Resolved.Mar 9 2015, 4:35 AM
Campbell Barton (campbellbarton) added a commit: rBec180218678b: Fix T43337: Group object disappear after append.

Closed by commit rBec180218678b.