元组有什么问题

Question

我试图让 shootRect 出现在 playerRect 的中间，并且在前面一个像素。在代码中，我尝试绘制 shootRect

我的代码：

MESH = ((playerRect.x + 1), (playerRect.x + 1), ((playerRect.topleft.y + playerRect.bottomleft.y) / 3), ((playerRect.topleft.y + playerRect.bottomleft.y) / 2))
shootRect = (screen, WHITE, MESH)
if event.type == KEYDOWN:
    if event.key == ord(' '):
pygame.draw.shootRect

错误：

    Traceback (most recent call last):
  File "C:\Users\***\***\***\***.py", line 76, in <module>
    MESH = ((playerRect.x + 1), (playerRect.x + 1), ((playerRect.topleft.y + playerRect.bottomleft.y) / 3), ((playerRect.topleft.y + playerRect.bottomleft.y) / 2))
AttributeError: 'tuple' object has no attribute 'y'

Answer 1

playerRect.topleft 是 (x, y) 格式的元组。而不是playerRect.topleft.y 来获取y 值，你想要playerRect.topleft[1]：

MESH = ((playerRect.x + 1), (playerRect.x + 1), ((playerRect.topleft[1] + playerRect.bottomleft[1]) / 3), ((playerRect.topleft[1] + playerRect.bottomleft[1]) / 2))
shootRect = (screen, WHITE, MESH)
if event.type == KEYDOWN:
    if event.key == ord(' '):
pygame.draw.shootRect

Answer 2

您可以使用playerRect.left 代替playerRect.topleft.y 和playerRect.bottomleft.y。是同一个值。

所以代替

playerRect.topleft.y + playerRect.bottomleft.y

你应该有

playerRect.top + playerRect.bottom

顺便说一句：如果你需要halfway ... playerRect，而不是playerRect.centery 或playerRect.centerx 或两者都有playerRect.center