Crash on recalculate normals / unexpected looptools result #39979

New Issue

Sam Kent · 2014-05-01T11:09:40+02:00

Sam Kent commented

2014-05-01 11:09:40 +02:00

System Information
Mac 10.6.8
2.4 Ghz Intel Core Duo
GeForce 8600M GT

Blender Version
Hash 6babb4d
2014-04-23
07:13

Short description of error
Loop tool result inconsistent. Recalculating normals causes segmentation fault and crash of the application.

Exact steps for others to reproduce the error
Add Mesh Extra objects Polysphere.
Edit Mode delete centre vertex in either + or - x direction.
Select Resulting edge loop, W loop tools circle.
Select all and recalculate normals results in a crash for me.

looperror.blend

**System Information** Mac 10.6.8 2.4 Ghz Intel Core Duo GeForce 8600M GT **Blender Version** Hash 6babb4d 2014-04-23 07:13 **Short description of error** Loop tool result inconsistent. Recalculating normals causes segmentation fault and crash of the application. **Exact steps for others to reproduce the error** Add Mesh Extra objects Polysphere. Edit Mode delete centre vertex in either + or - x direction. Select Resulting edge loop, W loop tools circle. Select all and recalculate normals results in a crash for me.![looperrorannotae.jpg](https://archive.blender.org/developer/F86511/looperrorannotae.jpg) [looperror.blend](https://archive.blender.org/developer/F86513/looperror.blend)

Sam Kent commented

2014-05-01 11:09:40 +02:00

Changed status to: 'Open'

Sam Kent commented

2014-05-01 11:09:40 +02:00

Added subscriber: @esskay

Fazekas Laszlo commented

2014-05-01 15:22:16 +02:00

Added subscriber: @totoro-4

Fazekas Laszlo commented

2014-05-01 15:22:16 +02:00

Partially confirmed with Blender 2.70a official (Hash: f93bc76) Ubuntu 14.04 64bit: no crash but the loop vertices are deleted just like on the picture. If you delete the central vertex in the Y or Z direction it works normally.

Another interesting: after the loop deleted, I cannot use the ctrl+rmb selection on the new hole edge correctly. The middle two edges are not selected. If you select this loop, and make a face on them, the result is also weird.

EDIT: I've tried this with a simple subdivided plane and the result of the circle command is heavily distorted if the circle is in the y,z plane. What if the vertex coordinate gets a NAN or INF?

Partially confirmed with Blender 2.70a official (Hash: f93bc76) Ubuntu 14.04 64bit: no crash but the loop vertices are deleted just like on the picture. If you delete the central vertex in the Y or Z direction it works normally. Another interesting: after the loop deleted, I cannot use the ctrl+rmb selection on the new hole edge correctly. The middle two edges are not selected. If you select this loop, and make a face on them, the result is also weird. EDIT: I've tried this with a simple subdivided plane and the result of the circle command is heavily distorted if the circle is in the y,z plane. What if the vertex coordinate gets a NAN or INF? ![#39979.png](https://archive.blender.org/developer/F86544/T39979.png) ![T39979_2.png](https://archive.blender.org/developer/F86546/T39979_2.png)

Bastien Montagne commented

2014-05-01 18:04:43 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2014-05-01 18:04:43 +02:00

What is “W loop tools circle.”, does it comes from an addon?

Bastien Montagne commented

2014-05-01 18:06:39 +02:00

uh, silly me, of course it is :/

Bastien Montagne commented

2014-05-01 18:15:12 +02:00

Mmmh… can’t reproduce with latest master, mind testing a recent build from our buildbot?

Mmmh… can’t reproduce with latest master, mind testing a recent build from [our buildbot](http://builder.blender.org/download)?

Sam Kent commented

2014-05-01 18:32:53 +02:00

091f13a buildbot

On the test file attached above I can still reproduce this.

091f13a buildbot On the test file attached above I can still reproduce this.

Bastien Montagne self-assigned this 2014-05-01 19:33:46 +02:00

Bastien Montagne commented

2014-05-01 19:33:46 +02:00

Yeah, actually, could reproduce the crash, but only from that file… would need to check the mesh is valid first.

Sam Kent commented

2014-05-01 19:53:01 +02:00

To be more precise;
maybe the difference with that file is that the polysphere is translated in edit mode a unit in the z direction first (a habit of mine) before deleting the vertex? I will check later.

To be more precise; maybe the difference with that file is that the polysphere is translated in edit mode a unit in the z direction first (a habit of mine) before deleting the vertex? I will check later.

Fazekas Laszlo commented

2014-05-01 20:28:32 +02:00

I think this happens only if the resulting circle is in the y-z plane. If you move any of the vertices slightly before, it works good. I also think it happens because the x coordinates of the calculated vertices gets an extremely big value or maybe NaN or Inf.

Bastien Montagne removed their assignment 2014-05-01 21:19:07 +02:00

Bart Crouch was assigned by Bastien Montagne

2014-05-01 21:19:07 +02:00

Bastien Montagne commented

2014-05-01 21:19:07 +02:00

Yes indeed, circle generates NaN’s in this case… Bart, reassinging to you. ;)