import sys
import pygame
from settings import Settings
from ship import Ship
from bullet import Bullet
class AlienInvasion:
def __init__(self):
# 初始化游戏并创建游戏资源
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode(
(self.settings.screen_width, self.settings.screen_height))
# 游戏窗口标题
pygame.display.set_caption("Alien Invasion")
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
def run_game(self):
# 开始游戏的主循环
while True:
# 监视键盘和鼠标事件
self._check_events()
self.ship.update()
self._update_bullets()
self._update_screen()
def _check_events(self):
# 响应按键和鼠标事件
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN: # 获取键盘按下
self._check_keydown_events(event)
elif event.type == pygame.KEYUP: # 获取键盘松手
self._check_keyup_events(event)
def _check_keydown_events(self, event):
# 按下
if event.key == pygame.K_RIGHT: # 向右移动飞船
self.ship.moving_right = True
elif event.key == pygame.K_LEFT:
self.ship.moving_left = True
elif event.key == pygame.K_q: # 可以按Q结束游戏
sys.exit()
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
# 松开
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
elif event.key == pygame.K_LEFT:
self.ship.moving_left = False
def _fire_bullet(self):
# 创建一颗子弹,并放到编组bullets中
if len(self.bullets) < self.settings.bullet_allowed:
new_bullet = Bullet(self) # 创建一个Bullet实例并赋给new_bullet
self.bullets.add(new_bullet) # 添加到编组中
def _update_bullets(self):
# 更新子弹的位置并删除消失的子弹
self.bullets.update()
# 删除消失的子弹
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
def _update_screen(self):
# 更新屏幕上的图像,并切换到新屏幕
# 每次循环都重绘屏幕
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
# 让最近绘制的屏幕可见
pygame.display.flip()
if __name__ == "__main__":
# 创建游戏实例并允许游戏
ai = AlienInvasion()
ai.run_game()
setting:
class Settings:
# 存储游戏中所有设置的类
def __init__(self):
# 初始化游戏设置
# 屏幕设置
# 游戏窗口:宽1200,高800像素
self.screen_width = 1200
self.screen_height = 800
# 设置背景颜色
self.bg_color = (230, 230, 230)
# 飞船设置
self.ship_speed = 1.5
# 子弹设置
self.bullet_speed = 1.0
self.bullet_width = 3
self.bullet_height = 15
self.bullet_color = (60, 60, 60)
self.bullet_allowed = 3
子弹:
import pygame
from pygame.sprite import Sprite
class Bullet(Sprite):
def __init__(self, ai_game):
# 在飞船当前位置创建一个子弹对象
super().__init__()
self.screen = ai_game.screen
self.settings = ai_game.settings
self.color = self.settings.bullet_color
# 在(0,0)处创建一个表示子弹的矩形,再设置正确的位置
self.rect = pygame.Rect(
0, 0, self.settings.bullet_width, self.settings.bullet_height)
self.rect.midtop = ai_game.ship.rect.midtop
# 存储用小数表示的子弹位置
self.y = float(self.rect.y)
def update(self):
# 向上移动子弹
# 更新表示子弹位置的小数值
self.y -= self.settings.bullet_speed
# 更新表示子弹的rect位置
self.rect.y = self.y
def draw_bullet(self):
# 在屏幕上绘制子弹
pygame.draw.rect(self.screen, self.color, self.rect)