python编写的一段纸飞机大战详细源码带完整注释

下面是一个简单的纸飞机大战的 Python 代码示例，基于 Pygame 游戏开发库实现。玩家可以控制纸飞机进行移动和射击，同时需要躲避敌机的攻击和障碍物的阻碍。程序示例参考如下

import pygame
import random

# 定义游戏窗口大小和背景颜色
WIDTH = 600
HEIGHT = 800
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)

# 初始化 Pygame
pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Paper Plane War")

# 加载游戏资源
plane_img = pygame.image.load("plane.png").convert_alpha()
bullet_img = pygame.image.load("bullet.png").convert_alpha()
enemy_img = pygame.image.load("enemy.png").convert_alpha()
obstacle_img = pygame.image.load("obstacle.png").convert_alpha()

# 定义游戏元素类
class Element(pygame.sprite.Sprite):
def __init__(self, x, y, image):
pygame.sprite.Sprite.__init__(self)
self.image = image
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y

def update(self):
pass

# 定义纸飞机类
class Plane(Element):
def __init__(self, x, y, image):
Element.__init__(self, x, y, image)
self.speed = 10
self.bullets = pygame.sprite.Group()

def update(self):
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT] and self.rect.x > 0:
self.rect.x -= self.speed
elif keys[pygame.K_RIGHT] and self.rect.x < WIDTH - self.rect.width:
self.rect.x += self.speed
elif keys[pygame.K_UP] and self.rect.y > 0:
self.rect.y -= self.speed
elif keys[pygame.K_DOWN] and self.rect.y < HEIGHT - self.rect.height:
self.rect.y += self.speed

if keys[pygame.K_SPACE]:
self.shoot()

def shoot(self):
bullet = Bullet(self.rect.centerx, self.rect.top, bullet_img)
self.bullets.add(bullet)

# 定义子弹类
class Bullet(Element):
def __init__(self, x, y, image):
Element.__init__(self, x, y, image)
self.speed = -20

def update(self):
self.rect.y += self.speed
if self.rect.bottom < 0:
self.kill()

# 定义敌机类
class Enemy(Element):
def __init__(self, x, y, image):
Element.__init__(self, x, y, image)
self.speed = 5

def update(self):
self.rect.y += self.speed
if self.rect.top > HEIGHT:
self.kill()

# 定义障碍物类
class Obstacle(Element):
def __init__(self, x, y, image):
Element.__init__(self, x, y, image)

def update(self):
pass

# 创建游戏元素组
all_sprites = pygame.sprite.Group()
player = Plane(WIDTH / 2, HEIGHT - 100, plane_img)
enemies = pygame.sprite.Group()
obstacles = pygame.sprite.Group()

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