更新 'alien_invasion.py'
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@ -1,8 +1,12 @@
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import sys
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from time import sleep
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import pygame
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from settings import Settings
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from game_stats import GameStats
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from scoreboard import Scoreboard
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from button import Button
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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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@ -20,16 +24,23 @@ class AlienInvasion:
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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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# 创建一个用于存储游戏统计信息的实例
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# 并创建记分牌
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self.stats = GameStats(self)
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self.sb = Scoreboard(self)
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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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# 创建Play按钮
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self.play_button = Button(self,"Play")
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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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# 设置背景色
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self.bg_color = (230, 230, 230)
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@ -66,9 +77,12 @@ class AlienInvasion:
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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_aliens()
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if self.stats.game_active:
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self.ship.update()
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self._update_bullets()
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self._update_aliens()
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self._update_screen()
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def _update_aliens(self):
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@ -79,6 +93,13 @@ class AlienInvasion:
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self._check_fleet_edges()
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self.aliens.update()
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# 检测外星人和飞船之间的碰撞
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if pygame.sprite.spritecollideany(self.ship, self.aliens):
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self._ship_hit()
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# 检查是否有外星人到达了屏幕底端
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self._check_aliens_bottom()
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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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@ -97,11 +118,20 @@ class AlienInvasion:
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collisions = pygame.sprite.groupcollide(
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self.bullets, self.aliens, True, True)
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if collisions:
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for aliens in collisions.values():
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self.stats.score += self.settings.alien_points * len(aliens)
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self.sb.prep_score()
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if not self.aliens:
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# 删除现有的子弹并新建一群外星人
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self.bullets.empty()
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self._create_fleet()
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self.settings.increase_speed()
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# 提高等级
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self.stats.level += 1
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self.sb.prep_level()
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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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@ -112,6 +142,34 @@ class AlienInvasion:
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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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elif event.type == pygame.MOUSEBUTTONDOWN:
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mouse_pos = pygame.mouse.get_pos()
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self._check_play_button(mouse_pos)
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def _check_play_button(self,mouse_pos):
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"""在玩家单机Play按钮时开始新游戏"""
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button_clicked = self.play_button.rect.collidepoint(mouse_pos)
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if button_clicked and not self.stats.game_active:
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# 重置游戏设置
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self.settings.initialize_dynamic_settings()
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# 重置游戏统计信息
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self.stats.reset_stats()
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self.stats.game_active = True
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self.sb.prep_score()
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self.sb.prep_level()
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self.sb.prep_ships()
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# 清空余下的外星人和子弹
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self.aliens.empty()
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self.bullets.empty()
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# 创建一群新的外星人并让飞船居中
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self._create_fleet()
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self.ship.center_ship()
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# 隐藏鼠标光标
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pygame.mouse.set_visible(False)
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def _check_keydown_events(self, event):
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"""响应按键"""
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@ -145,6 +203,13 @@ class AlienInvasion:
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bullet.draw_bullet()
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self.aliens.draw(self.screen)
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# 显示得分
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self.sb.show_score()
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# 如果游戏处于非活动状态，就绘制Play按钮
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if not self.stats.game_active:
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self.play_button.draw_button()
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pygame.display.flip()
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def _check_fleet_edges(self):
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@ -160,6 +225,46 @@ class AlienInvasion:
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alien.rect.y += self.settings.fleet_drop_speed
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self.settings.fleet_direction *= -1
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def _ship_hit(self):
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"""响应飞船被外星人撞到"""
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if self.stats.ships_left > 0:
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# 将ships_left减一并更新记分牌
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self.stats.ships_left -= 1
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self.sb.prep_ships()
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# 清空余下的外星人和子弹
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self.aliens.empty()
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self.bullets.empty()
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# 创建一群新的外星人，并将飞船放到屏幕底端的中央
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self._create_fleet()
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self.ship.center_ship()
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# 暂停
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sleep(0.5)
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else:
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self.stats.game_active = False
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pygame.mouse.set_visible(True)
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def _check_aliens_bottom(self):
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"""检查是否有外星人到达了屏幕底端"""
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screen_rect = self.screen.get_rect()
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for alien in self.aliens.sprites():
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if alien.rect.bottom >= screen_rect.bottom:
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# 像飞船被撞到一样处理
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self._ship_hit()
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break
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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()
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def _change_fleet_direction(self):
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"""将整个外星人下移，并改变它们的方向"""
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for alien in self.aliens.sprites():
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alien.rect.y += self.settings.fleet_drop_speed
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self.settings.fleet_direction *= -1
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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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