46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
import pygame
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from pygame.sprite import Sprite
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class Ship(Sprite):
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"""管理飞船的类"""
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def __init__(self, ai_game):
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"""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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# 加载飞船图像并获取其外接矩形
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self.image = pygame.image.load('images/ship.bmp')
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self.rect = self.image.get_rect()
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# 对于每艘新飞船，都将其放在屏幕底部的中央
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self.rect.midbottom = self.screen_rect.midbottom
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# 在飞船的属性x中存储最小值
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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):
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"""根据移动标志调整飞船的位置"""
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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):
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"""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):
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"""让飞船在屏幕底端局中"""
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self.rect.midbottom = self.screen_rect.midbottom
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self.x = float(self.rect.x) |