python - 如何将 Sprite 从矩形更改为图像？

Question

所以我从互联网上复制了一些代码( http://programarcadegames.com/python_examples/f.php?file=platform_moving.py )只是为了尝试 pygame...

我尝试将 self.image.fill(BLUE) 替换为 self.rect = pygame.image.load("TheArrow.png")

这是我的代码的一小段..

 def __init__(self):
        """ Constructor function """

        # Call the parent's constructor
        super().__init__()

        # Create an image of the block, and fill it with a color.
        # This could also be an image loaded from the disk.
        width = 40
        height = 60
        self.image = pygame.Surface([width, height])
        self.image.fill(BLUE)
        self.rect = pygame.image.load("TheArrow.png")

        # Set a referance to the image rect.
        self.rect = self.image.get_rect()

        # Set speed vector of player
        self.change_x = 0
        self.change_y = 0

        # List of sprites we can bump against
        self.level = None

这是原始代码...

def __init__(self):
        """ Constructor function """

        # Call the parent's constructor
        super().__init__()

        # Create an image of the block, and fill it with a color.
        # This could also be an image loaded from the disk.
        width = 40
        height = 60
        self.image = pygame.Surface([width, height])
        self.image.fill(RED)

        # Set a referance to the image rect.
        self.rect = self.image.get_rect()

        # Set speed vector of player
        self.change_x = 0
        self.change_y = 0

        # List of sprites we can bump against
        self.level = None

我希望显示图像 TheArrow.png 而不是矩形......

Answer 1

Rect 对象并不用于存储图像。 pygame.image.load() 返回带有图像的 Surface 。它可以直接使用，也可以在另一个 Surface 上使用 blitted。

 def __init__(self):
    """ Constructor function """

    # Call the parent's constructor
    super().__init__()

    width = 40
    height = 60
    self.image = pygame.image.load("TheArrow.png") #use the image Surface directly
    self.rect = self.image.get_rect()
    #the rest as in the original code

或者:

 def __init__(self):
    """ Constructor function """

    # Call the parent's constructor
    super().__init__()

    width = 40
    height = 60
    myimage = pygame.image.load("TheArrow.png")
    self.image = pygame.Surface([width, height])
    self.image.blit(myimage) #blit the image on an existing surface
    self.rect = self.image.get_rect()
    #the rest as in the original code

在前一种情况下，Surface(其关联的矩形，您可以使用self.image.get_rect()获取)的大小与加载的相同图像文件。
在后者中，您可以使用 [with, height] 设置大小。如果这些与图像尺寸不对应，图像将被剪切(如果更大)。

顺便说一句，将一个 Surface 传输到另一个 Surface 上就是在屏幕上显示 Surface 的方法。在 pygame 中，屏幕只是另一个 Surface，有点特殊。

看看 intro tutorial了解更多信息。