AttributeError：'pygame.mask.Mask‘对象没有属性'rect’

Question

我试图获得像素完美的碰撞，但我经常遇到这样的错误：

Traceback (most recent call last):
  File "D:\Projects\games\venv\lib\site-packages\pygame\sprite.py", line 1528, in collide_circle
    xdistance = left.rect.centerx - right.rect.centerx
AttributeError: 'pygame.mask.Mask' object has no attribute 'rect'

Process finished with exit code 1

我不知道出了什么问题。这是我的实现还是逻辑，还是两者兼而有之？

我的代码：

class AlienShooting(pygame.sprite.Sprite):

    def __init__(self, w=640, h=640):

        # init display

        # init game state
        self.spaceship_main = pygame.image.load('spacecraft_1.png').convert_alpha()

        self.alien_spacecraft1 = pygame.image.load('spacecraft_alien.png').convert_alpha()

        self.alien_spacecraft_rec1 = self.alien_spacecraft1.get_rect()

        self.mask1 = pygame.mask.from_surface(self.alien_spacecraft1)

        self.main_spaceship_mask = pygame.mask.from_surface(self.spaceship_main)


    def play_step(self):
        # user input

        # Move the spaceship

        # check if game over
        game_over = False
        if self._is_collision():
            game_over = True

        # Add new alien spaceships

        # Randomly move alien spaceships

        # update ui and clock

        # return game over and score
        return False

    def _is_collision(self):
        if pygame.sprite.collide_circle(self.mask1, self.main_spaceship_mask):
            return True
        return False

这可能是因为我的主要宇宙飞船和我的外星宇宙飞船都在同一个等级，但我不确定。

Answer 1

见How do I detect collision in pygame?和Pygame mask collision。如果要使用pygame.sprite.collide_circle()或pygame.sprite.collide_mask，就必须创建pygame.sprite.Sprite对象。

spaceship_main和alien_spacecraft1必须是雪碧对象。Sprite对象必须具有rect和image属性，并且可以选择具有mask属性。

例如：

class AlienShooting():
    def __init__(self, w=640, h=640):

        self.spaceship_main = pygame.sprite.Sprite()
        self.spaceship_main.image = pygame.image.load('spacecraft_1.png').convert_alpha()
        self.spaceship_main.rect = self.spaceship_main.image.get_rect(center = (140, 140))
        self.spaceship_main.mask = pygame.mask.from_surface(self.spaceship_main.image)

        self.alien_spacecraft1 = pygame.sprite.Sprite()
        self.alien_spacecraft1.image = pygame.image.load('spacecraft_alien.png').convert_alpha()
        self.alien_spacecraft1.rect = self.alien_spacecraft1.image.get_rect(center = (160, 160))
        self.alien_spacecraft1.mask = pygame.mask.from_surface(self.alien_spacecraft1.image)

    def _is_collision(self):
        if pygame.sprite.collide_mask(self.spaceship_main, self.alien_spacecraft1):
            return True
        return False