Strange rotation units in blur module

In darktable’s blur module, when choosing blur type: motion blur, the rotation slider has weird units. Horizontal blur (default) is as expected at 0º, but vertical is at 1,57º and not the expected 90º. Max value for the slider, which I would expect to be 180º, is 3,14º.
Any good reason for this or should I make a bug report? I have never noticed it before, as I rarely use motion blur.

Darktable 5.5 on Linux Mint.

As this is Pi/2 (90°) and Pi (180°) I assume it’s a simple conversion bug in the software. So my recommendation would be to raise a bug at github :blush:

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Yes, I noticed the Pi too. I’ll do it tomorrow, now is bedtime.

fix blur motion direction scale by dterrahe · Pull Request #20108 · darktable-org/darktable

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And before I had the time to make the bug report! Thank you!
:slight_smile: