更新 'bullet.py'
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@ -4,7 +4,7 @@ from pygame.sprite import Sprite
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class Bullet(Sprite):
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"""管理飞船所发射子弹的类"""
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def __init__(self,ai_game):
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def __init__(self, ai_game):
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"""在飞船当前位置创建一个子弹对象"""
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super().__init__()
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self.screen = ai_game.screen
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@ -12,12 +12,13 @@ class Bullet(Sprite):
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self.color = self.settings.bullet_color
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# 在(0,0)处创建一个表示子弹的矩形,再设置正确的位置
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self.rect = pygame.Rect(0,0,self.settings.buttle_width,
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self.settings.bullet_height)
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self.rect = pygame.Rect(0, 0, self.settings.bullet_width,
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self.settings.bullet_height)
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self.rect.midtop = ai_game.ship.rect.midtop
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# 储存用小数表示的子弹位置
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self.y = float(self.rect.y)
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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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@ -27,4 +28,4 @@ class Bullet(Sprite):
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def draw_bullet(self):
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"""在屏幕上绘制子弹"""
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pygame.draw.rect(self.screen,self.color,self.rect)
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pygame.draw.rect(self.screen, self.color, self.rect)
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