python实现浪漫的烟花秀

'''particles 类粒子在空中随机生成随机，变成一个圈、下坠、消失属性:  - id: 粒子的id  - x, y: 粒子的坐标  - vx, vy: 在坐标的变化速度  - total: 总数  - age: 粒子存在的时长  - color: 颜色  - cv: 画布  - lifespan: 最高存在时长'''  class Particle:   def __init__(self, cv, idx, total, explosion_speed, x=0., y=0., vx=0., vy=0., size=2., color='red', lifespan=2,         **kwargs):    self.id = idx    self.x = x    self.y = y    self.initial_speed = explosion_speed    self.vx = vx    self.vy = vy    self.total = total    self.age = 0    self.color = color    self.cv = cv    self.cid = self.cv.create_oval(      x - size, y - size, x + size,      y + size, fill=self.color)    self.lifespan = lifespan   def update(self, dt):    self.age += dt     # 粒子范围扩大    if self.alive() and self.expand():      move_x = cos(radians(self.id * 360 / self.total)) * self.initial_speed      move_y = sin(radians(self.id * 360 / self.total)) * self.initial_speed      self.cv.move(self.cid, move_x, move_y)      self.vx = move_x / (float(dt) * 1000)     # 以自由落体坠落    elif self.alive():      move_x = cos(radians(self.id * 360 / self.total))      # we technically don't need to update x, y because move will do the job      self.cv.move(self.cid, self.vx + move_x, self.vy + GRAVITY * dt)      self.vy += GRAVITY * dt     # 移除超过最高时长的粒子    elif self.cid is not None:      cv.delete(self.cid)      self.cid = None   # 扩大的时间  def expand (self):    return self.age <= 1.2   # 粒子是否在最高存在时长内  def alive(self):    return self.age <= self.lifespan

import tkinter as tkfrom PIL import Image, ImageTkfrom time import time, sleepfrom random import choice, uniform, randintfrom math import sin, cos, radians # 模拟重力GRAVITY = 0.05# 颜色选项（随机或者按顺序）colors = ['red', 'blue', 'yellow', 'white', 'green', 'orange', 'purple', 'seagreen', 'indigo', 'cornflowerblue'] '''particles 类粒子在空中随机生成随机，变成一个圈、下坠、消失属性:  - id: 粒子的id  - x, y: 粒子的坐标  - vx, vy: 在坐标的变化速度  - total: 总数  - age: 粒子存在的时长  - color: 颜色  - cv: 画布  - lifespan: 最高存在时长'''  class Particle:   def __init__(self, cv, idx, total, explosion_speed, x=0., y=0., vx=0., vy=0., size=2., color='red', lifespan=2,         **kwargs):    self.id = idx    self.x = x    self.y = y    self.initial_speed = explosion_speed    self.vx = vx    self.vy = vy    self.total = total    self.age = 0    self.color = color    self.cv = cv    self.cid = self.cv.create_oval(      x - size, y - size, x + size,      y + size, fill=self.color)    self.lifespan = lifespan   def update(self, dt):    self.age += dt     # 粒子范围扩大    if self.alive() and self.expand():      move_x = cos(radians(self.id * 360 / self.total)) * self.initial_speed      move_y = sin(radians(self.id * 360 / self.total)) * self.initial_speed      self.cv.move(self.cid, move_x, move_y)      self.vx = move_x / (float(dt) * 1000)     # 以自由落体坠落    elif self.alive():      move_x = cos(radians(self.id * 360 / self.total))      # we technically don't need to update x, y because move will do the job      self.cv.move(self.cid, self.vx + move_x, self.vy + GRAVITY * dt)      self.vy += GRAVITY * dt     # 移除超过最高时长的粒子    elif self.cid is not None:      cv.delete(self.cid)      self.cid = None   # 扩大的时间  def expand (self):    return self.age <= 1.2   # 粒子是否在最高存在时长内  def alive(self):    return self.age <= self.lifespan '''循环调用保持不停'''def simulate(cv):  t = time()  explode_points = []  wait_time = randint(10, 100)  numb_explode = randint(6, 10)  # 创建一个所有粒子同时扩大的二维列表  for point in range(numb_explode):    objects = []    x_cordi = randint(50, 550)    y_cordi = randint(50, 150)    speed = uniform(0.5, 1.5)    size = uniform(0.5, 3)    color = choice(colors)    explosion_speed = uniform(0.2, 1)    total_particles = randint(10, 50)    for i in range(1, total_particles):      r = Particle(cv, idx=i, total=total_particles, explosion_speed=explosion_speed, x=x_cordi, y=y_cordi,             vx=speed, vy=speed, color=color, size=size, lifespan=uniform(0.6, 1.75))      objects.append(r)    explode_points.append(objects)   total_time = .0  # 1.8s内一直扩大  while total_time < 1.8:    sleep(0.01)    tnew = time()    t, dt = tnew, tnew - t    for point in explode_points:      for item in point:        item.update(dt)    cv.update()    total_time += dt  # 循环调用  root.after(wait_time, simulate, cv)  def close(*ignore):  """退出程序、关闭窗口"""  global root  root.quit()  if __name__ == '__main__':  root = tk.Tk()  cv = tk.Canvas(root, height=360, width=480)  # 选一个好看的背景会让效果更惊艳！  image = Image.open("./image.jpg")  photo = ImageTk.PhotoImage(image)   cv.create_image(0, 0, image=photo, anchor='nw')  cv.pack()   root.protocol("WM_DELETE_WINDOW", close)  root.after(100, simulate, cv)  root.mainloop()