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30 lines
960 B
Python
30 lines
960 B
Python
from __future__ import annotations
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import pygame
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from pygame.sprite import Sprite
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from alien_invasion import AlienInvasion
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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: 'AlienInvasion') -> None:
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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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self.rect = pygame.Rect(0, 0, self.settings.bullet_width, self.settings.bullet_height)
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self.rect.midtop = ai_game.ship.rect.midtop
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self.y = float(self.rect.y)
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def update(self) -> None:
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"""Move the bullet up the screen."""
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self.y -= self.settings.bullet_speed
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self.rect.y = int(self.y)
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def draw_bullet(self) -> None:
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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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