131 lines
4.3 KiB
Python
131 lines
4.3 KiB
Python
import sys
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import pygame
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from settings import Settings
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from ship import Ship
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from bullet import Bullet
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from alien import Alien
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class AlienInvasion:
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"""管理游戏资源和行为的类"""
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def __init__(self):
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"""初始化游戏并创建游戏资源"""
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pygame.init()
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self.settings = Settings()
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self.screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
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self.settings.screen_width = self.screen.get_rect().width
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self.settings.screen_height = self.screen.get_rect().height
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pygame.display.set_caption("Alien Invasion")
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self.ship = Ship(self)
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self.bullets = pygame.sprite.Group()
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self.aliens = pygame.sprite.Group()
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self._create_fleet()
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# 设置背景色
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self.bg_color = (230, 230, 230)
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# 背景音乐
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pygame.mixer.music.load('music/flash.mp3')
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pygame.mixer.music.play(-1) # 重复循环
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def _create_fleet(self):
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"""创建外星人群"""
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# 创建一个外星人并计算一行可容纳多少外星人
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# 外星人的间距为外星人的宽度
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alien = Alien(self)
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alien_width,alien_height = alien.rect.size
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available_space_x = self.settings.screen_width - (2 * alien_width)
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number_aliens_x = available_space_x // (2 * alien_width)
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# 计算屏幕可容纳多少行外星人
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ship_height = self.ship.rect.height
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available_space_y = (self.settings.screen_height -
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(3 * alien_height) - ship_height)
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number_rows = available_space_y // (2 * alien_height)
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# 创建外星人群
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for row_number in range(number_rows):
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for alien_number in range(number_aliens_x):
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self._create_alien(alien_number, row_number)
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def _create_alien(self, alien_number, row_number):
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"""创建一个外星人并将其放在当前行"""
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alien = Alien(self)
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alien_width,alien_height = alien.rect.size
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alien.x = alien_width + 2 * alien_width * alien_number
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alien.rect.x = alien.x
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alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
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self.aliens.add(alien)
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def run_game(self):
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"""开始游戏的主循环"""
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while True:
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self._check_events()
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self.ship.update()
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self._update_bullets()
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self._update_screen()
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def _update_bullets(self):
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"""更新子弹的位置并删除消失的子弹"""
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#更新子弹的位置
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self.bullets.update()
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# 删除消失的子弹
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for bullet in self.bullets.copy():
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if bullet.rect.bottom <= 0:
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self.bullets.remove(bullet)
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def _check_events(self):
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"""响应按键和鼠标事件"""
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for event in pygame.event.get():
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if event.type == pygame.QUIT:
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sys.exit()
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elif event.type == pygame.KEYDOWN:
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self._check_keydown_events(event)
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elif event.type == pygame.KEYUP:
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self._check_keyup_events(event)
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def _check_keydown_events(self, event):
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"""响应按键"""
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if event.key == pygame.K_RIGHT:
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self.ship.moving_right = True
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elif event.key == pygame.K_LEFT:
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self.ship.moving_left = True
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elif event.key == pygame.K_q:
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sys.exit()
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elif event.key == pygame.K_SPACE:
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self._fire_bullet()
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def _check_keyup_events(self,event):
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"""响应松开"""
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if event.key == pygame.K_RIGHT:
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self.ship.moving_right = False
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elif event.key == pygame.K_LEFT:
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self.ship.moving_left = False
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def _fire_bullet(self):
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"""创建一颗子弹，并将其加入编组bullets中"""
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if len(self.bullets) < self.settings.bullets_allowed:
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new_bullet = Bullet(self)
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self.bullets.add(new_bullet)
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def _update_screen(self):
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"""更新屏幕上的图像，并切换到新屏幕"""
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self.screen.fill(self.settings.bg_color)
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self.ship.blitme()
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for bullet in self.bullets.sprites():
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bullet.draw_bullet()
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self.aliens.draw(self.screen)
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pygame.display.flip()
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if __name__ == '__main__':
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# 创建游戏实例并运行游戏
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ai = AlienInvasion()
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ai.run_game() |