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Maniphest T35679

Skin modifier individual vertex scaling assert()
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Description

--- Operating System, Graphics card ---
Ubuntu 12.04 on x86_64, Nvidia GeForce GTK 680

--- Blender version with error, and version that worked ---
2.67b

--- Short description of error ---
With certain meshes the preview of the skin modifier causes blender to segfault when ctrl+a scaling certain vertices to zero. This happens when I want to individualy scale a vertex to a precise value between zero and one.

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---

- start with the default scene
- remove the faces from the default cube
- add a skin modifier
- select the top 4 vertices
- press ctrl+a and write '0' or '.'

Event Timeline

Daniel Nilsson (vq_) edited a custom field.Jun 9 2013, 12:15 AM
Campbell Barton (campbellbarton) added a comment.Jun 10 2013, 4:15 AM

This is causing an assert in bullet:

blender.bin: extern/bullet2/src/LinearMath/btConvexHullComputer.cpp:1706: void btConvexHullInternal::merge(btConvexHullInternal::IntermediateHull&, btConvexHullInternal::IntermediateHull&): Assertion `dot <= 0' failed.

Brecht Van Lommel (brecht) changed the task status from Unknown Status to Resolved.Sep 21 2014, 2:21 AM
Brecht Van Lommel (brecht) added a subscriber: Brecht Van Lommel (brecht).

Same bug as T38521: blender crashes when scaling all vertex radii to zero when skin modifier present which was fixed some time ago, I forgot to close this report as well.