236 lines
7.7 KiB
Python
236 lines
7.7 KiB
Python
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 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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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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# 创建一个用于存储游戏统计信息的实例
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self.stats = GameStats(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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# 设置背景色
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self.bg_color = (230, 230, 230)
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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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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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"""
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检查是否有外星人位于屏幕边缘
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并更新整群外星人的位置
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"""
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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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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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self._check_bullet_alien_collisions()
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def _check_bullet_alien_collisions(self):
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"""响应子弹和外星人碰撞"""
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# 删除发生碰撞的子弹和外星人
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collisions = pygame.sprite.groupcollide(
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self.bullets, self.aliens, True, True)
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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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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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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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# 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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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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# 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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"""有外星人到达边缘时采取相应的措施"""
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for alien in self.aliens.sprites():
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if alien.check_edges():
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self._change_fleet_direction()
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break
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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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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
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self.stats.ships_left -= 1
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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() |