While in X-ray display, selection made via lasso select does not display properly #63017

New Issue

Chuck Ocheret · 2019-03-27T16:29:09+01:00

Chuck Ocheret commented

2019-03-27 16:29:09 +01:00

System Information
Operating system: Darwin-18.5.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 560X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.8.38

Blender Version
Broken: version: 2.80 (sub 51), branch: master, commit date: 2019-03-27 13:26, hash: 2d34420648
Worked: (optional)

Short description of error
While in X-ray display, selection made via lasso select does not display properly

Exact steps for others to reproduce the error
1 - Create a new general Blender file using the General template
2 - Delete everything in the scene
3 - Create a monkey mesh
4 - Turn on x-ray display
5 - Enter edit mode and make sure you're in vertex mode (I'm supplying a .blend file that starts at this state)LassoXrayBug.blend
6 - Lasso select (ctrl-right drag) part of Suzanne (say, the chin)
7 - Observe that nothing appears to be selected
8 - Enter circle select (C)
9 - Left drag the circle to any vertex
10 - Observe that the lasso select actually worked but was just not displaying

~chuck

**System Information** Operating system: Darwin-18.5.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 560X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.8.38 **Blender Version** Broken: version: 2.80 (sub 51), branch: master, commit date: 2019-03-27 13:26, hash: `2d34420648` Worked: (optional) **Short description of error** While in X-ray display, selection made via lasso select does not display properly **Exact steps for others to reproduce the error** 1 - Create a new general Blender file using the General template 2 - Delete everything in the scene 3 - Create a monkey mesh 4 - Turn on x-ray display 5 - Enter edit mode and make sure you're in vertex mode (I'm supplying a .blend file that starts at this state)[LassoXrayBug.blend](https://archive.blender.org/developer/F6891243/LassoXrayBug.blend) 6 - Lasso select (ctrl-right drag) part of Suzanne (say, the chin) 7 - **Observe that nothing appears to be selected** 8 - Enter circle select (C) 9 - Left drag the circle to any vertex 10 - **Observe that the lasso select actually worked but was just not displaying** ~chuck

Chuck Ocheret commented

2019-03-27 16:29:09 +01:00

Added subscriber: @ChuckOcheret

blender-admin commented

2019-03-27 16:29:09 +01:00

#63019 was marked as duplicate of this issue

Chuck Ocheret commented

2019-03-27 16:57:51 +01:00

This problem also occurs in edge select mode or face select mode. So in step 5 above, it is not essential to be in vertex select mode.

Germano Cavalcante was assigned by Brecht Van Lommel

2019-03-27 19:25:42 +01:00

Brecht Van Lommel commented

2019-03-27 19:25:52 +01:00

Added subscriber: @gentleclockdivider

Brecht Van Lommel commented

2019-03-27 19:28:36 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-03-27 19:28:36 +01:00

I suspect this is related to the selection changes but did not try to find the commit.

From what I can tell, lasso select does not work the first time after rotating the view. Then if you do it a second time it works. As if the depth buffer is not updated or something.

I suspect this is related to the selection changes but did not try to find the commit. From what I can tell, lasso select does not work the first time after rotating the view. Then if you do it a second time it works. As if the depth buffer is not updated or something.

Chuck Ocheret commented

2019-03-27 19:38:14 +01:00

It does seem depth buffer related in some cases. Another symptom I just found. In the same .blend file I sent, try the following:

Turn off x-ray display
In edit mode select all with A
Observe that only some of the selected faces are highlighted (it looks like there is some z-fighting going on)
Rotate the view with middle mouse drag
Observe faces flickering as highlight is only intermittently displayed
Release the middle mouse

Observe that only some of the selected faces are highlighted

This is after a rebuild (a couple of hours after the one I originally reported from). Not sure if this is new or I simply didn't notice it before.

It does seem depth buffer related in some cases. Another symptom I just found. In the same .blend file I sent, try the following: - Turn off x-ray display - In edit mode select all with A - Observe that only some of the selected faces are highlighted (it looks like there is some z-fighting going on) - Rotate the view with middle mouse drag - Observe faces flickering as highlight is only intermittently displayed - Release the middle mouse # Observe that only some of the selected faces are highlighted This is after a rebuild (a couple of hours after the one I originally reported from). Not sure if this is new or I simply didn't notice it before.

Germano Cavalcante commented

2019-03-27 20:24:06 +01:00

I don't know which commit resulted in this regression, but it's not related to the recent changes in the selection.
The problem is in the do_lasso_select_mesh function. The data.is_changed variable is not always set to update the mesh.
The solution is simple, but it might be good to investigate which commit has brought this problem.

I don't know which commit resulted in this regression, but it's not related to the recent changes in the selection. The problem is in the `do_lasso_select_mesh` function. The `data.is_changed` variable is not always set to update the mesh. The solution is simple, but it might be good to investigate which commit has brought this problem.

blender-admin commented

2019-03-27 20:48:12 +01:00

This issue was referenced by 37e3b89506

This issue was referenced by 37e3b89506cfb13fa36fdf765d6ef4763d2bfd43

Germano Cavalcante commented

2019-03-27 20:52:27 +01:00

Changed status from 'Open' to: 'Resolved'

Germano Cavalcante closed this issue

2019-03-27 20:52:27 +01:00

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While in X-ray display, selection made via lasso select does not display properly #63017

Observe that only some of the selected faces are highlighted