38 lines
1.4 KiB
Python
38 lines
1.4 KiB
Python
import pygame
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from pygame.sprite import Sprite
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class Ship(Sprite): # 管理飞船的类
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def __init__(self, ai_game): # 初始化飞船并设置其初始位置
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super().__init__()
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self.screen = ai_game.screen
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self.settings = ai_game.settings
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self.screen_rect = ai_game.screen.get_rect()
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self.image = pygame.image.load('images/ship.bmp') # 加载飞船图像并获取其外接矩形
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self.rect = self.image.get_rect()
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self.rect.midbottom = self.screen_rect.midbottom # 对于每艘新飞船，都将其放在屏幕的中央
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# 在飞船的属性x中储存小数值
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self.x = float(self.rect.x)
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# 移动标志
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self.moving_right = False
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self.moving_left = False
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def update(self): # 根据移动标志调整飞船位置
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# 更新飞船而不是rect对象的x值
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if self.moving_right and self.rect.right < self.screen_rect.right:
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self.x += self.settings.ship_speed
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if self.moving_left and self.rect.left > 0:
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self.x -= self.settings.ship_speed
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# 根据self.x 更新rect对象
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self.rect.x = self.x
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def blitme(self): # 在指定位置绘制飞船
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self.screen.blit(self.image, self.rect)
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def center_ship(self): # 让飞船在屏幕底部剧中
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self.rect.midbottom = self.screen_rect.midbottom
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self.x = float(self.rect.x) |