打ち上げ花火

import pygame
import random
import math

# 初期化
pygame.init()

# 画面サイズ
WIDTH = 800
HEIGHT = 482
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("打ち上げ花火")
背景=pygame.image.load("背景.png")
猫たち=pygame.image.load("猫たち.png")
打ち上げ音=pygame.mixer.Sound("pyu.wav")
花火=pygame.mixer.Sound("bom.wav")
BGM=pygame.mixer.Sound("wind.wav")
n=0
BGM.play(-1)
# 色の定義
BLACK = (0, 0, 0)

# 花火を定義するクラス
class Firework:
    def __init__(self):
        self.x = random.randint(200, WIDTH - 200)
        self.y = HEIGHT
        self.size = random.randint(3, 5)
        self.color = [random.randint(100, 255) for _ in range(3)]
        self.speed = random.uniform(6, 8)
        self.exploded = False
        self.particles = []

    def update(self):
        global n
        n+=1
        if not self.exploded:
            # 花火が上昇する
            if n%2==0:
                打ち上げ音.play()
            if n%3==0:
                花火.play()
            self.y -= self.speed
            # 一定の高さで爆発
            if self.speed < 0.5:
                self.explode()
            else:
                self.speed -= 0.1
        else:
            # 爆発後、粒子を更新
            for particle in self.particles:
                particle.update()

    def explode(self):
        # 爆発したら粒子を生成（等間隔の角度で）
        self.exploded = True
        num_particles = 100  # より多くの粒子で美しい円形を描く
        for i in range(num_particles):
            angle = i * (2 * math.pi / num_particles)  # 等間隔の角度
            speed = random.uniform(2, 5)
            self.particles.append(Particle(self.x, self.y, speed, angle, self.color))

    def draw(self, screen):
        if not self.exploded:
            pygame.draw.circle(screen, self.color, (int(self.x), int(self.y)), self.size)
        else:
            for particle in self.particles:
                particle.draw(screen)

# 粒子を定義するクラス
class Particle:
    def __init__(self, x, y, speed, angle, color):
        self.x = x
        self.y = y
        self.speed_x = math.cos(angle) * speed
        self.speed_y = math.sin(angle) * speed
        self.color = color
        self.size = random.randint(2, 4)
        self.lifetime = random.randint(40, 60)  # 粒子の寿命を長くして綺麗に表示

    def update(self):
        # 粒子が飛び散る
        self.x += self.speed_x
        self.y += self.speed_y
        self.lifetime -= 1
        self.size = max(0, self.size - 0.03)  # 粒子がゆっくりと小さくなる

    def draw(self, screen):
        if self.lifetime > 0:
            pygame.draw.circle(screen, self.color, (int(self.x), int(self.y)), int(self.size))

# メインループ
def main():
    clock = pygame.time.Clock()
    fireworks = []

    running = True
    while running:
        screen.fill(BLACK)
        screen.blit(背景,(0,0))
        screen.blit(猫たち,(0,200))

        # イベント処理
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False

        # 一定確率で新しい花火を追加
        if random.randint(0, 100) < 3:
            fireworks.append(Firework())

        # 花火の更新と描画
        for firework in fireworks:
            firework.update()
            firework.draw(screen)

        # 終了した花火を削除
        fireworks = [f for f in fireworks if not (f.exploded and all(p.lifetime <= 0 for p in f.particles))]

        pygame.display.flip()
        clock.tick(60)

    pygame.quit()

if __name__ == "__main__":
    main()