#! /usr/local/bin/python2.5
#rotate flashing wedge
from psychopy import visual,event,core
globalClock = core.Clock()
win = visual.Window([800,800])
#make two wedges (in opposite contrast) and alternate them for flashing
wedge1 = visual.RadialStim(win, tex='sqrXsqr', rgb=1,size=1,
visibleWedge=[0, 45], radialCycles=4, angularCycles=8, interpolate=True)
wedge2 = visual.RadialStim(win, tex='sqrXsqr', rgb=-1,size=1,
visibleWedge=[0, 45], radialCycles=4, angularCycles=8, interpolate=True)
t=0
rotationRate = 0.01 #revs per sec
flashPeriod = 0.1 #seconds for one B-W cycle (ie 1/Hz)
while t<5:#for 5 secs
t=globalClock.getTime()
if (t%flashPeriod) < (flashPeriod/2.0):# (NB more accurate to use number of frames)
stim = wedge1
else:
stim=wedge2
stim.setOri(t*rotationRate*360.0)
stim.draw()
win.flip()
win.close()
print win.fps()
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