Question

我试图在心理编码器中每100毫秒左右更新一次meshStim的方向。目前，我正在使用以下行更新属性（或尝试）：

orientationArray = orientation.split(',') #reading csv line as a list
selectOri = 0 #my tool to select the searched value in the list
gabor.ori = int(orientationArray[selectOri]) #select value as function of the "selectOri", in this case always the first one
continueroutine = True
while continueroutine:
   if timer == 0.1: # This doesn't work but it shows you what is planned
        selectOri = selectOri + 1 #update value
        gabor.ori = int(orientationArray[selectOri]) #update value
        win.flip()

我无法找到在所需时间范围内更新的正确方法。

Answer 1

每隔x帧执行一些操作的简洁方法是将modulo operation与包含win.flip()的循环结合使用。因此，如果您想每6帧（60 Hz监视器上100 ms）执行某些操作，请在每个帧中执行此操作：

frame = 0  # the current frame number
while continueroutine:
    if frame % 6 == 0:  # % is modulo. Here every sixth frame
        gabor.ori = int(orientationArray[selectOri + 1])

    # Run this every iteration to synchronize the while-loop with the monitor's frames.
    gabor.draw()
    win.flip()
    frame += 1

在PsychoPy中每隔...... ms或帧更新刺激属性

1 个答案: