2024年就快要到了，提前用python代码给自己做一个烟花秀庆祝一下。本次介绍的python实例是实现一个简易的烟花秀。

一、步骤分析

总的来说，要实现烟花秀的效果，需要以下几个步骤：

1.1、创建一个类，包含烟花各项粒子的轨迹的操作
1.2、创建一个类，包含烟花轨迹的各项操作
1.3、创建一个类，包含烟花相关的操作
1.4、在主函数文件中创建一个窗体
1.5、在窗体上绘制烟花及文字

二、步骤实现

2.1、前期准备

在前期我们需要将编程需要的素材准备好。这里编程平台使用的是pycharm，用到的pygame、sys、random包下面的相关类和方法已经自有的类和方法。

2.2、烟花粒子轨迹类实现代码

# 导入包
from pygame.math import Vector2 as vector
from pygame import display, draw, font"""
粒子轨迹类
"""
class Trail:# 全局变量# 粒子颜色trail_colours = [(45, 45, 45), (60, 60, 60), (75, 75, 75), (125, 125, 125), (150, 150, 150)]def __init__(self, n, size, dynamic):self.pos_in_line = nself.pos = vector(-10, -10)self.dynamic = dynamic# 确定颜色和大小if self.dynamic:self.colour = self.trail_colours[n]self.size = int(size - n / 2)else:self.colour = (255, 255, 200)self.size = size - 2if self.size < 0:self.size = 0# 确定位置def get_pos(self, x, y):self.pos = vector(x, y)# 显示方法def show(self, win):draw.circle(win, self.colour, (int(self.pos.x), int(self.pos.y)), self.size)# 烟花更新
def update(win, fireworks):# 实现烟花的显示for fw in fireworks:fw.update(win)if fw.remove():fireworks.remove(fw)# 在屏幕上添加文字snowFont = font.Font("./YuGothM.TTF", 100)  # 导入字体文件，并设置字体str1 = snowFont.render("元旦快乐", True, (235, 215, 245))win.blit(str1, (200, 325))display.update()

2.3、烟花轨迹类实现代码

# 导入包
import math
from random import randint, uniform, choice
from pygame import draw
from pygame.math import Vector2 as vector
# 自有文件
from litao.fire.Trail import Trail"""
烟花轨迹类
"""
class Particle:def __init__(self, x, y, firework, colour):self.firework = fireworkself.pos = vector(x, y)self.origin = vector(x, y)self.radius = 20self.remove = Falseself.explosion_radius = randint(5, 18)self.life = 0self.acc = vector(0, 0)# 跟踪变量self.trails = []  # 存储粒子轨迹对象self.prev_posx = [-10] * 10  # 存储x轴最后10个位置self.prev_posy = [-10] * 10  # 存储y轴最后10个位置# 根据是否有烟花，做不同的操作if self.firework:self.vel = vector(0, -randint(17, 20))self.size = 5self.colour = colourfor i in range(5):self.trails.append(Trail(i, self.size, True))else:self.vel = vector(uniform(-1, 1), uniform(-1, 1))self.vel.x *= randint(7, self.explosion_radius + 2)self.vel.y *= randint(7, self.explosion_radius + 2)# 向量self.size = randint(2, 4)self.colour = choice(colour)# 5 个 tails总计for i in range(5):self.trails.append(Trail(i, self.size, False))# 用于控制粒子移动速度def apply_force(self, force):self.acc += force# 粒子移动def move(self):if not self.firework:self.vel.x *= 0.8self.vel.y *= 0.8self.vel += self.accself.pos += self.velself.acc *= 0if self.life == 0 and not self.firework:  # 检查粒子的爆炸范围distance = math.sqrt((self.pos.x - self.origin.x) ** 2 + (self.pos.y - self.origin.y) ** 2)if distance > self.explosion_radius:self.remove = True# 调用粒子衰变速度self.decay()# 调用粒子更新方法self.trail_update()# 存活时间加一self.life += 1# 粒子显示def show(self, win):draw.circle(win, (self.colour[0], self.colour[1], self.colour[2], 0), (int(self.pos.x), int(self.pos.y)),self.size)# 用于控制粒子衰变def decay(self):# 根据存活时间来控制衰变效果if 50 > self.life > 10:ran = randint(0, 30)if ran == 0:self.remove = Trueelif self.life > 50:ran = randint(0, 5)if ran == 0:self.remove = True# 粒子更新方法def trail_update(self):self.prev_posx.pop()self.prev_posx.insert(0, int(self.pos.x))self.prev_posy.pop()self.prev_posy.insert(0, int(self.pos.y))for n, t in enumerate(self.trails):if t.dynamic:t.get_pos(self.prev_posx[n + 1], self.prev_posy[n + 1])else:t.get_pos(self.prev_posx[n + 3], self.prev_posy[n + 3])

2.4、烟花类实现代码

# 导入包
from random import randint, uniform
from pygame.math import Vector2 as vector
from pygame import draw
# 自有文件
from litao.fire.Particle import Particle"""
烟花类
"""
class Firework:# 全局变量gravity = vector(0, 0.3)def __init__(self):# 随机颜色self.colour = (randint(0, 255), randint(0, 255), randint(0, 255))   # 发射阶段烟花颜色# 爆炸后烟花颜色self.colours = ((randint(0, 255), randint(0, 255), randint(0, 255)),(randint(0, 255), randint(0, 255), randint(0, 255)),(randint(0, 255), randint(0, 255), randint(0, 255)))# 烟花轨迹self.firework = Particle(randint(0, 800), 700, True,self.colour)  # Creates the firework particleself.exploded = False   # 用于判断烟花是否分裂self.particles = []     # 存储烟花轨迹对象self.min_max_particles = vector(100, 225)# 更新烟花def update(self, win):  # 每帧调用if not self.exploded:# 爆炸前效果self.firework.apply_force(self.gravity)self.firework.move()for tf in self.firework.trails:tf.show(win)self.show(win)if self.firework.vel.y >= 0:self.exploded = Trueself.explode()else:# 爆炸后效果for particle in self.particles:particle.apply_force(vector(self.gravity.x + uniform(-1, 1) / 20, self.gravity.y / 2 + (randint(1, 8) / 100)))particle.move()for t in particle.trails:t.show(win)particle.show(win)def explode(self):# amount 数量amount = randint(self.min_max_particles.x, self.min_max_particles.y)for i in range(amount):self.particles.append(Particle(self.firework.pos.x, self.firework.pos.y, False, self.colours))# 烟花展示部分def show(self, win):draw.circle(win, self.colour, (int(self.firework.pos.x), int(self.firework.pos.y)), self.firework.size)# 烟花移除部分def remove(self):if self.exploded:for p in self.particles:if p.remove is True:self.particles.remove(p)if len(self.particles) == 0:return Trueelse:return False

2.5、烟花秀实现代码

# 导入包
import pygame
import sys
from random import randint
from pygame import display, time
# 自有文件
from litao.fire.FireWorks import Firework
from litao.fire.Trail import update"""
主函数
"""
# 创建窗口
pygame.init()
win = pygame.display.set_mode((800, 700))   # 设置窗口大小
display.set_caption("烟花秀")      # 设置窗口标题
# 创建用于延时的对象
clock = time.Clock()# 创建烟花集合
fireworks = [Firework() for i in range(2)]while True:clock.tick(60)  # 延时60毫秒# 设置鼠标和键盘监听事件，当鼠标点击X或者键盘按下esc时程序退出for event in pygame.event.get():if event.type == pygame.QUIT:sys.exit()keys = pygame.key.get_pressed()if keys[pygame.K_ESCAPE]:sys.exit()win.fill((20, 20, 30))  # 重新绘制背景# 如果产生的随机数为1，则添加一朵新的烟花if randint(0, 20) == 1:  # 创建新的烟花fireworks.append(Firework())# 刷新烟花update(win, fireworks)

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