OS (e.g. Win10): Mac OS 10.14.6
PsychoPy version (e.g. 1.84.x): 3.1.5
What did you try to make it work?:
I have a line stimulus and want to rotate it each frame by a constant. It does that, but rotates around its centre. Instead, I want to rotate it around its edge – effectively like a clock hand. Is that possible in builder?