Pygame draw.rect不使用rect参数

Question

试图复制太空入侵者。我正在跟踪这里的导游，https://kidscancode.org/blog/2016/08/pygame_shmup_part_5/。这是玩家精灵

class Player(pygame.sprite.Sprite):

    def __init__(self):

        super(Player, self).__init__()

        self.image = pygame.image.load('./Assets/PNG/playerShip1_orange.png').convert()
        self.image.set_colorkey(BLACK)
        self.image = pygame.transform.scale(self.image, (50, 40))

        # WIN_SIZE = 500, 500

        self.rect = self.image.get_rect()
        self.rect.centerx = WIN_SIZE[0] / 2
        self.rect.bottom = WIN_SIZE[1] - 10
        self.speedx = 0

        #   NOT WORKING FOR SOME REASON
        #   self.image.fill(WHITE, self.rect)
        #   pygame.draw.rect(self.image, WHITE, self.rect, 1)
        #   pygame.draw.circle(self.image, WHITE, self.rect.center, 25, 1)
        
        pygame.draw.rect(self.image, WHITE, ( (0,0), (50, 40) ), 1)

我想要在sprite周围创建一个矩形轮廓，如果我使用上面代码中的最后一行，我就可以这样做。但是，即使每个参数都是正确的，并且没有引发编译/运行时错误，注释代码也不起作用。

来自主类的关系事件片段

class Game:

    def __init__(self):

        pygame.init()

        self._win = pygame.display.set_mode(WIN_SIZE, 0, 32)
        self._clock = pygame.time.Clock()
        
        self._all_sprites = pygame.sprite.Group()
        
        self._player = Player()
        self._all_sprites.add(self._player)
        
        self._game_over = False

    def run(self):

        while not self._game_over:
            
            self._clock.tick(FPS)

            self._all_sprites.update()
            self._all_sprites.draw(self._win)

            pygame.display.flip()

def main():
    game = Game()
    game.run()

if __name__ == "__main__":
    main()

完整资料来源:

如能提供任何帮助，将不胜感激:)

Answer 1

在设置矩形的位置之前，必须在图像上绘制轮廓：

self.rect = self.image.get_rect()

pygame.draw.rect(self.image, WHITE, self.rect, 1)
pygame.draw.circle(self.image, WHITE, self.rect.center, 25, 1)

self.rect.centerx = WIN_SIZE[0] // 2
self.rect.bottom = WIN_SIZE[1] - 10
self.speedx = 0

get_rect()返回的矩形的位置为(0，0)。这也是图像中轮廓的左上角位置。注意，您在图像上绘制轮廓，而不是在显示上。