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3d print toolbox checks report false positives
Closed, ResolvedPublic

Description

System Information
Windows 7 x64

Blender Version
Broken: 2.78c and 58a434b

Short description of error
When checking a model for 3d print, it reports a lot of overlapping and non-flat faces, although those are flat and not overlaping

Exact steps for others to reproduce the error
Open attached file, click check all, the face is detected as non-flat, even after it was flattened by the flatten operator.


Event Timeline

Bastien Montagne (mont29) lowered the priority of this task from 90 to 50.

Problem comes from straight loops (those which both edges are aligned and form a straight line) returning normalized (0,0,1) normal instead of face's normal, as stated in BMLoop.calc_normal() doc… will check.