飞机大战Python

飞机大战是一款经典的游戏，下面是一个Python实现的飞机大战项目，具体内容如下：

1.导入必要的模块和常量定义

import gc
import random
import pygame

# 常量定义
class Constants:
    SCREEN_WIDTH = 480
    SCREEN_HEIGHT = 800
    HERO_SPEED = 10
    ENEMY_SPEED = 5
    BULLET_SPEED = 12
    ENEMY_INTERVAL = 50
    HERO_HP = 3
    ENEMY_HP = 1

2.创建玩家飞机精灵类

class HeroPlane(pygame.sprite.Sprite):
    def __init__(self, hero_surface, hero_rect, init_pos):
        pygame.sprite.Sprite.__init__(self)
        self.image = hero_surface
        self.rect = hero_rect
        self.rect.topleft = init_pos
        self.speed = Constants.HERO_SPEED
        self.bullets = pygame.sprite.Group()
        self.hp = Constants.HERO_HP

    def move(self, offset):
        x = self.rect.left + offset[pygame.K_RIGHT] - offset[pygame.K_LEFT]
        y = self.rect.top + offset[pygame.K_DOWN] - offset[pygame.K_UP]
        if x < 0:
            x = 0
        elif x > Constants.SCREEN_WIDTH - self.rect.width:
            x = Constants.SCREEN_WIDTH - self.rect.width
        if y < 0:
            y = 0
        elif y > Constants.SCREEN_HEIGHT - self.rect.height:
            y = Constants.SCREEN_HEIGHT - self.rect.height
        self.rect.topleft = (x, y)

    def shoot(self, bullet_surface):
        bullet = Bullet(bullet_surface, self.rect.midtop)
        self.bullets.add(bullet)

    def hit(self):
        self.hp -= 1

    def reset(self):
        self.hp = Constants.HERO_HP
        self.bullets.empty()

3.创建敌机精灵类

class EnemyPlane(pygame.sprite.Sprite):
    def __init__(self, enemy_surface, enemy_rect, init_pos):
        pygame.sprite.Sprite.__init__(self)
        self.image = enemy_surface
        self.rect = enemy_rect
        self.rect.topleft = init_pos
        self.speed = Constants.ENEMY_SPEED
        self.hp = Constants.ENEMY_HP

    def move(self):
        self.rect.top += self.speed

    def shoot(self, bullet_surface):
        bullet = Bullet(bullet_surface, self.rect.midbottom, True)
        return bullet

    def hit(self):
        self.hp -= 1

4.创建子弹精灵类

class Bullet(pygame.sprite.Sprite):
    def __init__(self, bullet_surface, init_pos, is_enemy=False):
        pygame.sprite.Sprite.__init__(self)
        self.image = bullet_surface
        self.rect = self.image.get_rect()
        self.rect.midbottom = init_pos
        self.speed = Constants.BULLET_SPEED if not is_enemy else -Constants.BULLET_SPEED

    def move(self):
        self.rect.top += self.speed

    def is_out_of_screen(self):
        return self.rect.bottom < 0 or self.rect.top > Constants.SCREEN_HEIGHT

5.创建游戏主函数

def main():
    # 初始化
    pygame.init()
    pygame.mixer.init()
    screen = pygame.display.set_mode((Constants.SCREEN_WIDTH, Constants.SCREEN_HEIGHT))
    pygame.display.set_caption('飞机大战')
    pygame.mixer.music.load('bgm.mp3')
    pygame.mixer.music.play(-1, 0.0)
    hero_surface = pygame.image.load('hero.png').convert_alpha()
    hero_rect = hero_surface.get_rect()
    enemy_surface = pygame.image.load('enemy.png').convert_alpha()
    enemy_rect = enemy_surface.get_rect()
    bullet_surface = pygame.image.load('bullet.png').convert_alpha()
    clock = pygame.time.Clock()
    hero = HeroPlane(hero_surface, hero_rect, ((Constants.SCREEN_WIDTH - hero_rect.width) // 2, Constants.SCREEN_HEIGHT - hero_rect.height - 50))
    enemies = pygame.sprite.Group()
    bullets = pygame.sprite.Group()
    enemy_interval = Constants.ENEMY_INTERVAL
    score = 0
    font = pygame.font.Font(None, 36)

    # 游戏循环
    while True:
        # 处理事件
        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_SPACE:
                    hero.shoot(bullet_surface)

        # 移动玩家飞机
        offset = pygame.key.get_pressed()
        hero.move(offset)

        # 移动敌机
        enemy_interval -= 1
        if enemy_interval == 0:
            enemy_interval = Constants.ENEMY_INTERVAL
            enemy = EnemyPlane(enemy_surface, enemy_rect, (random.randint(0, Constants.SCREEN_WIDTH - enemy_rect.width), -enemy_rect.height))
            enemies.add(enemy)
        for enemy in enemies:
            enemy.move()

        # 移动子弹
        for bullet in bullets:
            bullet.move()

        # 碰撞检测
        for enemy in enemies:
            for bullet in hero.bullets:
                if pygame.sprite.collide_rect(enemy, bullet):
                    enemy.hit()
                    hero.bullets.remove(bullet)
                    bullets.remove(bullet)
                    if enemy.hp == 0:
                        enemies.remove(enemy)
                        score += 1
        for bullet in bullets:
            if bullet.is_out_of_screen():
                bullets.remove(bullet)
        for enemy in enemies:
            for bullet in enemy.bullets:
                if pygame.sprite.collide_rect(hero, bullet):
                    hero.hit()
                    enemy.bullets.remove(bullet)
                    bullets.remove(bullet)
                    if hero.hp == 0:
                        pygame.quit()
                        sys.exit()

        # 绘制屏幕
        screen.fill((255, 255, 255))
        screen.blit(hero_surface, hero.rect)
        for enemy in enemies:
            screen.blit(enemy_surface, enemy.rect)
            bullet = enemy.shoot(bullet_surface)
            if bullet:
                enemy.bullets.add(bullet)
        for bullet in hero.bullets:
            screen.blit(bullet_surface, bullet.rect)
        for bullet in bullets:
            screen.blit(bullet_surface, bullet.rect)
        score_text = font.render('Score: %d' % score, True, (0, 0, 0))
        screen.blit(score_text, (10, 10))
        hp_text = font.render('HP: %d' % hero.hp, True, (0, 0, 0))
        screen.blit(hp_text, (Constants.SCREEN_WIDTH - hp_text.get_width() - 10, 10))
        pygame.display.update()

        # 控制帧率
        clock.tick(60)