Pygame:鼠标特定轴检测 [英] Pygame: Mouse Specific Axis Detection

问题描述

例如，如何仅检测X轴?

How can I detect ONLY the X axis, for example?

maus_x = 0
maus_y = 0
pygame.mouse.get_pos(maus_x, maus_y)

while not done:

    for event in pygame.event.get():

    if event.type == pygame.MOUSEMOTION:         
        if maus_x < wx_coord:
            angle += 10

理论上，此"pygame.mouse.get_pos"返回一个元组(x，y).但是，我正在定义一个变量来表示该元组中的x和y.问题是，当我移动鼠标(pygame.MOUSEMOTION)时，当我执行写在"maus_x< wx_coord:"中的内容时，它也会执行Y轴功能.那根本没有道理.

In theory, this "pygame.mouse.get_pos" returns a tuple (x, y). But, I'm defining there a variable to represent the x and y in this tuple. The thing is, when I move the mouse (pygame.MOUSEMOTION), when I do what is written in "maus_x < wx_coord:", it executes the function with the Y axis too. And that makes no sense at all.

仅当我在x轴上移动鼠标时才必须执行"angle + = 10".任何人都知道发生了什么事吗? :)

"angle +=10" must be executed ONLY when I move the mouse in the x axis. Anyone have any idea of what is happening? :)

推荐答案

那不是函数调用的工作方式.在您的代码中，maus_x始终为0，因为没有修改过的内容.您想要:

That's not how function calls work. In your code, maus_x is always 0, since nothing ever modifies it. You want:

while not done:
    for event in pygame.event.get():
        if event.type == pygame.MOUSEMOTION:      
            mousex, mousey = pygame.mouse.get_pos()   
            if mousex < wx_coord:
                angle += 10

实际上，您可能只想检查事件直接对象:

In fact, you probably just want to inspect the event object directly:

while not done:
    for event in pygame.event.get():
        if event.type == pygame.MOUSEMOTION:      
            mousex, mousey = event.pos   
            if mousex < wx_coord:
                angle += 10

或更妙的是:

while not done:
    for event in pygame.event.get():
        if event.type == pygame.MOUSEMOTION:      
            relx, rely = event.rel   
            if relx != 0:  # x movement
                angle += 10

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