[Issue] DraftVecUtils.getPlaneRotation() returns scewed/scaled matrix

[Jolbas]

Is there an existing issue for this?

• I have searched the existing issues

Forums discussion

https://forum.freecad.org/viewtopic.php?t=76390

Version

0.21 (Development)

Full version info

OS: Ubuntu 20.04.5 LTS (KDE/plasma)
Word size of FreeCAD: 64-bit
Version: recent master, see hash
Build type: Debug
Branch: master
Hash: 4adf98e369417e5c2cb00eef3eef8a76daa30011
Python 3.8.10, Qt 5.12.8, Coin 4.0.0, Vtk 7.1.1, OCC 7.3.0
Locale: English/United States (en_US)
Installed mods: 
  * 3DfindIT 1.2.0
  * Render 2023.2.0
  * BIM 2021.12.0
  * Reinforcement
  * Manipulator 1.5.0
  * Assembly4.backup1662941442.2770898
  * parts_library
  * Assembly4 0.12.5
  * fasteners 0.4.54
  * Help 1.0.3
  * Silk 1.0.0
  * dodo 1.0.0
  * Curves 0.6.7

Subproject(s) affected?

Draft

Issue description

DraftVecUtils.getPlaneRotation() does not return a pure rotation matrix unless u, v and w is perfectly perpendicular normalized vectors. If there is a scew matrix it is not accepted by App.Rotation(matrix) since bad52df.
This issue is affecting mostly draft dimensions but also some import functions.
See forum thread for test file

Anything else?

No response

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