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36 lines
1.2 KiB
36 lines
1.2 KiB
# 开发日期: 2024/4/26
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import pygame
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from pygame.sprite import Sprite
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class Bullet(Sprite):
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"""一个对飞船发射的子弹进行管理的类"""
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def __init__(self, ai_settings, screen, ship):
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"""在飞船所处的位置创建一个子弹对象"""
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super(Bullet, self).__init__()
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self.screen = screen
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# 加载子弹图像，并获取其外接矩形
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self.image = pygame.image.load('images/bullet.png')
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self.sound = pygame.mixer.Sound('bgm/bullet.wav')
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self.rect = self.image.get_rect()
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self.rect.centerx = ship.rect.centerx
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self.rect.top = ship.rect.top
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# 存储用小数表示的子弹位置
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self.y = float(self.rect.y)
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"""设置子弹的伤害"""
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self.damage = ai_settings.bullet_damage
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# 从游戏设置对象中获取子弹的速度
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self.speed_factor = ai_settings.bullet_speed_factor
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def update(self):
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"""向上移动子弹"""
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# 更新表示子弹位置的小数值
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self.y -= self.speed_factor
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# 更新表示子弹的rect的位置
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self.rect.y = self.y
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def draw_bullet(self):
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"""在屏幕上绘制子弹"""
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self.screen.blit(self.image, self.rect)
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