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visibleWedge of RadialStim

How can I used the visibleWedge parameter of RadialStim to allow a range that passes through 0 degrees? It appears that 0 degrees is straight up
and I tried visibleWedge( -40, 40 ) and (320, 40) which did not render. I can draw it (0,80) and use ori= -40, but that feels ‘unclean’.

The full story is actually 4 wedges of 80 degrees each centered on 0, 90, 180, and 270 degrees and they are all ok except the 0±40.

[ PsychoPy v1.84.2 Python 2.7 GPU nvidia GTX1060 ]

No idea, but what about (320, 400)?