Metaball disappears when deleting first metaball object #52324

New Issue

Ola Sikström · 2017-08-09T19:58:27+02:00

Ola Sikström commented

2017-08-09 19:58:27 +02:00

System Information
Operating system and graphics card

Problem seems to be independent of graphics card and OS.
Have tried on OS X (intel) and different combinations of windows/linux and intel/nvidia cards.

Blender Version
Broken: 2.79 rc1 (and at least a couple of releases back)
Worked: not sure which release, but it did work before

Exact steps for others to reproduce the error

Bug is easy to reproduce, so no blend-file is attached.
There are in fact two problems described here, but I assume they are closely related.

Problem 1:

create two separate metaball objects
delete first object
all generated metaball meshes disappears from view,
problem persists after metaball object is moved, and also after save/reload

Problem 2:

create two separate metaball objects
delete second object
both metaball meshes are still shown
problem disappears when a metaball object is moved / refreshed

**System Information** Operating system and graphics card Problem seems to be independent of graphics card and OS. Have tried on OS X (intel) and different combinations of windows/linux and intel/nvidia cards. **Blender Version** Broken: 2.79 rc1 (and at least a couple of releases back) Worked: not sure which release, but it did work before **Exact steps for others to reproduce the error** Bug is easy to reproduce, so no blend-file is attached. There are in fact two problems described here, but I assume they are closely related. Problem 1: - create two separate metaball objects - delete first object - all generated metaball meshes disappears from view, - problem persists after metaball object is moved, and also after save/reload Problem 2: - create two separate metaball objects - delete second object - both metaball meshes are still shown - problem disappears when a metaball object is moved / refreshed

Ola Sikström commented

2017-08-09 19:58:27 +02:00

Changed status to: 'Open'

Ola Sikström commented

2017-08-09 19:58:28 +02:00

Added subscriber: @OlaSikstrom

cris commented

2017-08-09 23:35:13 +02:00

Added subscriber: @ShyGuyMath

cris self-assigned this 2017-08-09 23:35:13 +02:00

cris commented

2017-08-09 23:35:13 +02:00

It disappears on me as well, I will take a look!

Campbell Barton commented

2017-08-10 11:23:47 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2017-08-10 11:23:47 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2017-08-10 11:23:47 +02:00

Campbell Barton commented

2017-08-10 11:23:47 +02:00

This is working as intended, see: https://docs.blender.org/manual/en/dev/modeling/metas/editing.html#object-families

Sergey Sharybin commented

2017-08-10 11:24:52 +02:00

Added subscribers: @mont29, @Sergey

cris was unassigned by Sergey Sharybin

2017-08-10 11:24:52 +02:00

Bastien Montagne was assigned by Sergey Sharybin

2017-08-10 11:24:52 +02:00

Sergey Sharybin commented

2017-08-10 11:24:52 +02:00

There is so called "motherball", which contains actual tessellation of all related metaballs. It is calculated as simple as dropping possible ".001" and such suffixes. For example, motherball for "MyMeta.001" will be "MyMeta", and "MyMeta" will contain tessellation for all "MyMeta.001", "MyMeta.002" and so on. If you remove motherball you'll have nowhere to store tessellation. Not saying it's intuitive, but it's how things works.

Missing update was introduced by 897e97f.

@mont29, we "just" need to have DEG_id_tag_update somewhere, at lest that's my guess :)

There is so called "motherball", which contains actual tessellation of all related metaballs. It is calculated as simple as dropping possible ".001" and such suffixes. For example, motherball for "MyMeta.001" will be "MyMeta", and "MyMeta" will contain tessellation for all "MyMeta.001", "MyMeta.002" and so on. If you remove motherball you'll have nowhere to store tessellation. Not saying it's intuitive, but it's how things works. Missing update was introduced by 897e97f. @mont29, we "just" need to have DEG_id_tag_update somewhere, at lest that's my guess :)

Sergey Sharybin commented

2017-08-10 11:25:22 +02:00

Changed status from 'Archived' to: 'Open'

Sergey Sharybin reopened this issue

2017-08-10 11:25:22 +02:00

Sergey Sharybin commented

2017-08-10 11:25:22 +02:00

@ideasman42, re-opening. The second issue is a real bug.