Selection issue on masked geometry #44168

New Issue

Karja Krähwald · 2015-03-28T16:20:17+01:00

Karja Krähwald commented

2015-03-28 16:20:17 +01:00

System Information
Windows 7 64, GTX 980

Blender Version
Broken: bbf09d9 + 469ba8a

Short description of error
"Select All" (Ctrl-A) selects masked geometry as well if you use a Mask modifier to hide it (with enabled edit cage).

This behaviour isnt the case for hidden geometry (H), so i think there might be a bug.

Exact steps for others to reproduce the error
MaskGeometryBug.blend

Steps:

Add a monkey mesh
- Give it a vertex group "Group"
- Assign one half of the head to "Group"
Give monkey a Mask modifier
- Choose "Group" as modifier vertex group
- Deselect all geometry
- Enable Edit Cage Mode

You should have a halfed monkey head now.

Still in Edit Mode, select all visible geometry (Ctrl-A)
Assign "Group" again on the already assigned visible part

Problem:
Unexpectedly, the monkey head has returned completely,
because (Ctrl-A) has included the hidden geometry.

Note:
This behaviour is likely to cause confusion at a later time if you use Mask modifier as a method for Vertex Group weighting.

**System Information** Windows 7 64, GTX 980 **Blender Version** Broken: bbf09d9 + 469ba8a **Short description of error** "Select All" (Ctrl-A) selects masked geometry as well if you use a Mask modifier to hide it (with enabled edit cage). This behaviour isnt the case for hidden geometry (H), so i think there might be a bug. **Exact steps for others to reproduce the error** [MaskGeometryBug.blend](https://archive.blender.org/developer/F155798/MaskGeometryBug.blend) Steps: - Add a monkey mesh - Give it a vertex group "Group" - Assign one half of the head to "Group" - Give monkey a Mask modifier - Choose "Group" as modifier vertex group - Deselect all geometry - Enable Edit Cage Mode You should have a halfed monkey head now. - Still in Edit Mode, select all visible geometry (Ctrl-A) - Assign "Group" again on the already assigned visible part **Problem:** Unexpectedly, the monkey head has returned completely, because (Ctrl-A) has included the hidden geometry. Note: This behaviour is likely to cause confusion at a later time if you use Mask modifier as a method for Vertex Group weighting.

Karja Krähwald commented

2015-03-28 16:20:17 +01:00

Changed status to: 'Open'

Karja Krähwald commented

2015-03-28 16:20:17 +01:00

Added subscriber: @karja

Bastien Montagne commented

2015-03-30 11:19:26 +02:00

Added subscribers: @ideasman42, @mont29

Bastien Montagne commented

2015-03-30 11:19:27 +02:00

Campbell, need your advice here.

To me there is no bug, operators do not work on modifiers' result, only on raw mesh usually, so it’s expected that 'select all' does not take into account geometry hidden by mask modifier…

Campbell, need your advice here. To me there is no bug, operators do not work on modifiers' result, only on raw mesh usually, so it’s expected that 'select all' does not take into account geometry hidden by mask modifier…

Campbell Barton commented

2015-03-30 12:19:29 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2015-03-30 12:19:29 +02:00

Campbell Barton self-assigned this 2015-03-30 12:19:29 +02:00

Campbell Barton commented

2015-03-30 12:19:29 +02:00

@mont29, right - even allowing the mask modifier to operate in edit-mode is questionable (since it can hide what is really happening to the mesh).

Checked no the modifier stack and there isn't any good way to disable cage on a modifier, (which would be reasonable in this case, but probably not worth supporting just for this case).

closing.

@mont29, right - even allowing the mask modifier to operate in edit-mode is questionable (since it can hide what is really happening to the mesh). Checked no the modifier stack and there isn't any good way to disable *cage* on a modifier, (which would be reasonable in this case, but probably not worth supporting just for this case). closing.

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Selection issue on masked geometry #44168