31 lines
1.1 KiB
Python
31 lines
1.1 KiB
Python
import pygame
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from pygame.sprite import Sprite
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class Bullet(Sprite):
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"""A class to manage bullets fired from the ship"""
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def __init__(self, ai_game):
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"""Create a bullet object at the ship's current position."""
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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.color = self.settings.bullet_color
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# Create a bullet rect at (0, 0) and then set correct position.
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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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# Store the bullet's position as a decimal value.
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self.y = float(self.rect.y)
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def update(self):
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"""Move the bullet up the screen."""
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# Update the decimal position of the bullet.
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self.y -= self.settings.bullet_speed
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# Update the rect position.
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self.rect.y = self.y
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def draw_bullet(self):
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"""Draw the bullet to the screen."""
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pygame.draw.rect(self.screen, self.color, self.rect)
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