表白烟花Python代码

### Python表白烟花效果实现

为了创建一个具有视觉吸引力并带有表白语句的烟花效果程序，可以采用`pygame`库。此库提供了丰富的功能用于图形绘制和动画制作。

#### 安装依赖项
首先需要安装`pygame`模块，在命令行输入如下指令完成安装：

pip install pygame

#### 编写表白烟花代码
以下是基于Python编写的表白烟花效果的具体实现方式[^2]：

import sys, random, math
import pygame as pg


class Particle(pg.sprite.Sprite):
    def __init__(self, pos, color, vel=None, acc=pg.Vector2(0, 0.1)):
        super().__init__()
        self.image = pg.Surface((4, 4))
        self.image.fill(color)
        self.rect = self.image.get_rect(center=pos)

        if not vel:
            angle = random.uniform(0, 2 * math.pi)
            speed = random.uniform(7, 9)
            vel = pg.Vector2(math.cos(angle) * speed,
                             math.sin(angle) * speed)

        self.vel = vel
        self.acc = acc
        self.lifetime = 80
        self.color = color

    def update(self):
        self.vel += self.acc
        self.rect.center += self.vel
        self.lifetime -= 1
        if self.lifetime <= 0 or not screen.get_rect().colliderect(self.rect):
            self.kill()


def create_firework(pos, num_particles, colors):
    for _ in range(num_particles):
        Particle(
            pos=pos,
            color=random.choice(colors),
            vel=None)


# 初始化Pygame环境
pg.init()
screen = pg.display.set_mode((800, 600))

font = pg.font.Font(None, 50)
text_surface = font.render('我爱你，永远在一起！', True, (255, 255, 255))
text_rect = text_surface.get_rect(center=(400, 300))

particles_group = pg.sprite.Group()

colors = [(255, 0, 0), (0, 255, 0), (0, 0, 255)]

clock = pg.time.Clock()
running = True
while running:

    clock.tick(60)

    for event in pg.event.get():
        if event.type == pg.MOUSEBUTTONDOWN and event.button == 1:
            mouse_pos = pg.mouse.get_pos()
            create_firework(mouse_pos, 100, colors)

        elif event.type == pg.QUIT:
            running = False

    particles_group.update()

    screen.fill((0, 0, 0))
    
    # 居中显示表白文字
    screen.blit(text_surface, text_rect)

    particles_group.draw(screen)

    pg.display.flip()

pg.quit()
sys.exit()

上述代码定义了一个粒子类`Particle`模拟单个火花的行为，并通过函数`create_firework()`批量生成这些粒子形成烟火爆炸的效果。当点击鼠标左键时触发一次烟花绽放事件；而屏幕中央始终展示着一条温馨的爱情告白信息：“我爱你，永远在一起！”