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Maniphest T38209

Curves with depth and subsurf results in inverted normals when zooming
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Description

System Information
Windows 7 64 bit
AMD Radeon HD 6950

Blender Version
Broken: Blender 2.69.0 (official release [r60995])

I've got a scene with a couple of beziercurves (with bevel, depth and subsurf) and a few meshes and when I zoom in on the curves (while something else is selected like a mesh) the normals of the curves seem to get inverted (can be seen with backface culling off).

Exact steps for others to reproduce the error
I've attached an image and a blend file illustrating the problem below. I've only tested this on my computer but the problem should occur if you just zoom in on the curves without changing the selection or anything else.

Nosslak_curves_inverted_normals_bug.blend663 KBDownload

I tried reproducing the error in a new file (with a few plane meshes and curves) but I couldn't reproduce it.

Revisions and Commits

rB Blender
rB54e56cd3094a Fix T38209: Curve's didn't account for negative scale
rBAC Blender Add-ons Contrib
rBAC54e56cd3094a Fix T38209: Curve's didn't account for negative scale

Event Timeline

Robin Karlsson (nosslak) created this task.Jan 14 2014, 11:17 AM
Robin Karlsson (nosslak) raised the priority of this task from to 90.
Robin Karlsson (nosslak) updated the task description. (Show Details)
Robin Karlsson (nosslak) added a project: BF Blender.
Robin Karlsson (nosslak) edited a custom field.
Robin Karlsson (nosslak) added a subscriber: Robin Karlsson (nosslak).
Campbell Barton (campbellbarton) claimed this task.Jan 14 2014, 12:49 PM
Campbell Barton (campbellbarton) lowered the priority of this task from 90 to 50.Jan 14 2014, 12:52 PM
Robin Karlsson (nosslak) added a comment.Jan 14 2014, 2:17 PM

I can't edit the task but I accidentally wrote that the problem can be seen with backface culling off that should of course have said that the problem can be seen with backface culling on.

Campbell Barton (campbellbarton) edited this Maniphest Task.Jan 14 2014, 2:40 PM
Campbell Barton (campbellbarton) changed the task status from Unknown Status to Resolved.Jan 14 2014, 2:40 PM

Closed by commit rB54e56cd3094a.

Campbell Barton (campbellbarton) added a comment.Jan 14 2014, 2:50 PM

@Robin Karlsson (nosslak) thanks for the report,

good find, this also exposes some other problems with selection and backface culling, checking now.

Campbell Barton (campbellbarton) edited this Maniphest Task.May 12 2014, 4:36 PM