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我正在编写的代码在屏幕上放置一个形状,并允许通过向上/向下箭头键操作该形状。我一直试图让它做的是使形状变化的数量取决于按键的顺序;只要输入与初始按键相同,形状变化量就会很大。然而,当按键的第一次“反转”发生时(例如,进行微调),在该点之后的每一次按键(不管它是否与最初的按键相同)都应该以小得多的比例改变圆圈(不是交互的,只是 0.1cm 变化而不是 2cm)。代码是用 Psychopy 编写的。

我想我还没有掌握应该为此设置循环的方式,但我看不出如何改变它们来做我想做的事情。为实际代码道歉,而不是一个最小的例子 - 任何建议都非常感谢。

for thisTrial in trials:
    endKey = 0
    nKeypress = 0
    count = 0
    counting = 0
    if thisTrial == 'ellipse':
        ellipseHeightinit = 7.6,1.9 + (round(numpy.random.uniform(-1,1),1))
    elif thisTrial == 'circle':
        ellipseHeightinit = 7.6,7.6 + (round(numpy.random.uniform(-1,1),1))
    ellipseHeight = ellipseHeightinit
    ellipseStim.setSize(ellipseHeight, log = False) # set the initial size of the shape  
    while endKey == 0:
        ellipseStim.setAutoDraw(True)
        win.flip() # flip the window to see the stimuli
        allKeys = event.waitKeys() 
        if count < 1: #store the first keypress made
            for thisKey in allKeys:
                firstKeypress = thisKey
                count += 1
                event.clearEvents()
        for thisKey in allKeys: # change the size of the shape depending on key pressed
            if thisKey == 'up':
                nKeypress = nKeypress + 1
            elif thisKey == 'down':
                nKeypress = nKeypress - 1
            elif thisKey == 'space':
                endKey = 1
            while counting < 1: # attempt to make step size large until reversal
                if thisKey == firstKeypress:
                    ellipseHeight = 7.6, ellipseHeightinit[1] + nKeypress*20
                    break
                elif thisKey != firstKeypress:
                    ellipseHeight = 7.6, ellipseHeightinit[1] + nKeypress*0.1
                    counting += 1
                    break
       ellipseStim.setSize(ellipseHeight, log = False) # set new shape size     
    ellipseStim.setAutoDraw(False)
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1 回答 1

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您应该存储最后一次按下的键,以及最后使用的移动量。如果按下的新键相同,则增加您的金额。否则,您将其设置为最小值。

于 2013-02-08T09:51:25.843 回答