【Python趣味】：easy魂斗罗

代码说明：
敌人类 Enemy：敌人会从屏幕右侧向左移动，移出屏幕后会被移除。
子弹类 Bullet：玩家按下空格键可以发射子弹，子弹会向右移动，移出屏幕后会被移除。
关卡设置：目前关卡只是简单的设定，随着关卡推进，可调整敌人的生成速度等。这里敌人的生成间隔是 1500 毫秒。
碰撞检测：使用 pygame.sprite.groupcollide 检测子弹和敌人的碰撞，当子弹击中敌人时，两者都会被移除。

import pygame
import sys
import random

# 初始化 Pygame
pygame.init()

# 设置游戏窗口
width, height = 800, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("简易魂斗罗")

# 定义颜色
WHITE = (255, 255, 255)
BLUE = (0, 0, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)


# 玩家类
class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((50, 50))
        self.image.fill(BLUE)
        self.rect = self.image.get_rect()
        self.rect.x = 50
        self.rect.y = height - 50
        self.speed_x = 0
        self.speed_y = 0
        self.gravity = 0.5
        self.jump_power = -10
        self.on_ground = True
        self.shoot_delay = 200
        self.last_shot = pygame.time.get_ticks()

    def update(self):
        # 应用重力
        self.speed_y += self.gravity
        self.rect.y += self.speed_y

        # 检查是否触地
        if self.rect.y >= height - 50:
            self.rect.y = height - 50
            self.speed_y = 0
            self.on_ground = True

        # 移动玩家
        self.rect.x += self.speed_x

        # 边界检查
        if self.rect.x < 0:
            self.rect.x = 0
        elif self.rect.x > width - 50:
            self.rect.x = width - 50

    def jump(self):
        if self.on_ground:
            self.speed_y = self.jump_power
            self.on_ground = False

    def shoot(self, bullets):
        now = pygame.time.get_ticks()
        if now - self.last_shot > self.shoot_delay:
            self.last_shot = now
            bullet = Bullet(self.rect.centerx, self.rect.centery)
            bullets.add(bullet)


# 敌人类
class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((30, 30))
        self.image.fill(RED)
        self.rect = self.image.get_rect()
        self.rect.x = width
        self.rect.y = height - 30
        self.speed_x = -2

    def update(self):
        self.rect.x += self.speed_x
        if self.rect.x < 0:
            self.kill()


# 子弹类
class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.Surface((10, 5))
        self.image.fill(BLACK)
        self.rect = self.image.get_rect()
        self.rect.centerx = x
        self.rect.centery = y
        self.speed_x = 8

    def update(self):
        self.rect.x += self.speed_x
        if self.rect.x > width:
            self.kill()


# 创建玩家对象
player = Player()
all_sprites = pygame.sprite.Group()
all_sprites.add(player)

# 敌人和子弹组
enemies = pygame.sprite.Group()
bullets = pygame.sprite.Group()

# 关卡设置
level = 1
enemy_spawn_delay = 1500
last_enemy_spawn = pygame.time.get_ticks()

# 游戏主循环
clock = pygame.time.Clock()
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                player.speed_x = -5
            elif event.key == pygame.K_RIGHT:
                player.speed_x = 5
            elif event.key == pygame.K_UP:
                player.jump()
            elif event.key == pygame.K_SPACE:
                player.shoot(bullets)
        elif event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                player.speed_x = 0

    # 生成敌人
    now = pygame.time.get_ticks()
    if now - last_enemy_spawn > enemy_spawn_delay:
        last_enemy_spawn = now
        enemy = Enemy()
        all_sprites.add(enemy)
        enemies.add(enemy)

    # 检查子弹与敌人的碰撞
    hits = pygame.sprite.groupcollide(enemies, bullets, True, True)

    # 更新精灵
    all_sprites.update()
    bullets.update()

    # 绘制屏幕
    screen.fill(WHITE)
    all_sprites.draw(screen)
    bullets.draw(screen)

    # 更新显示
    pygame.display.flip()

    # 控制帧率
    clock.tick(60)