python - 如何在 Pygame 中获取 Sprite 的位置？

Question

所以我正在尝试对一只鼠标进行编程，让它移动到屏幕上离它最近的奶酪 block 并吃掉它。然而，为了做到这一点，我需要找到其他 Sprite 的位置/坐标。那么我如何在 Pygame 中找到 Sprite 的位置呢？谢谢!

Answer 1

根据文档，每个 Sprite 都需要有一个 .rect 属性。
请参阅 pygame.sprite 的文档:

The basic Sprite class can draw the Sprites it contains to a Surface. The Group.draw() method requires that each Sprite have a Surface.image attribute and a Surface.rect.

.rect 属性必须由应用程序设置:

我再次引用文档:

When subclassing the Sprite, be sure to call the base initializer before adding the Sprite to Groups. For example:

class Block(pygame.sprite.Sprite):

    # Constructor. Pass in the color of the block,
    # and its x and y position
    def __init__(self, color, width, height):
       # Call the parent class (Sprite) constructor
       pygame.sprite.Sprite.__init__(self)

       # Create an image of the block, and fill it with a color.
       # This could also be an image loaded from the disk.
       self.image = pygame.Surface([width, height])
       self.image.fill(color)

       # Fetch the rectangle object that has the dimensions of the image
       # Update the position of this object by setting the values of rect.x and rect.y
       self.rect = self.image.get_rect()

当然也可以直接给 Sprite 对象设置属性:

例如

mySprite = pygame.sprite.Sprite()
mySprite.image = pygame.Surface([width, height])
mySprite.rect = mySprite.image.get_rect()

之后可以随时从 .rect 属性获取位置。请参阅pygame.Rect :

例如

topLeftX, tolLeftY = mySprite.rect.topleft

centerX, centerY = mySprite.rect.center