关于python:Python带你跨年用Python送你一场跨年烟花秀

2021 曾经靠近序幕了，2022 行将到来，本文咱们用 Python 送你一场跨年烟花秀。

咱们用到的 Python 模块包含：tkinter、PIL、time、random、math，如果第三方模块没有装的话，pip install 一下即可，上面看一下代码实现。

导库

import tkinter as tk
from PIL import Image, ImageTk
from time import time, sleep
from random import choice, uniform, randint
from math import sin, cos, radians

烟花色彩

colors = ['red', 'blue', 'yellow', 'white', 'green', 'orange', 'purple', 'seagreen', 'indigo', 'cornflowerblue']

定义烟花类

class fireworks:
    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
        # 烟花绽放 x 轴
        self.x = x
        # 烟花绽放 x 轴
        self.y = y
        self.initial_speed = explosion_speed
        # 外放 x 轴速度
        self.vx = vx
        # 外放 y 轴速度
        self.vy = vy
        # 绽开的粒子数
        self.total = total
        # 已停留时间
        self.age = 0
        # 色彩
        self.color = color
        # 画布
        self.cv = cv
        self.cid = self.cv.create_oval(x - size, y - size, x + size, y + size,
        fill=self.color)
        self.lifespan = lifespan

    # 更新数据
    def update(self, dt):
        self.age += dt
        # 粒子收缩
        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)
        # 收缩到最大着落
        elif self.alive():
            move_x = cos(radians(self.id * 360 / self.total))
            self.cv.move(self.cid, self.vx + move_x, self.vy + 0.5 * dt)
            self.vy += 0.5 * dt
        # 过期移除
        elif self.cid is not None:
            cv.delete(self.cid)
            self.cid = None

    # 定义收缩成果的工夫帧
    def expand(self):
        return self.age <= 1.5

    # 查看粒子是否仍在生命周期内
    def alive(self):
        return self.age <= self.lifespan

燃放烟花

def ignite(cv):
    t = time()
    # 烟花列表
    explode_points = []
    wait_time = randint(10, 100)
    # 爆炸的个数
    numb_explode = randint(6, 10)
    for point in range(numb_explode):
        # 爆炸粒子列表
        objects = []
        # 爆炸 x 轴
        x_cordi = randint(50, 550)
        # 爆炸 y 轴
        y_cordi = randint(50, 150)
        speed = uniform(0.5, 1.5)
        size = uniform(0.5, 3)
        color = choice(colors)
        # 爆炸的绽开速度
        explosion_speed = uniform(0.2, 1)
        # 爆炸的粒子数半径
        total_particles = randint(10, 50)
        for i in range(1, total_particles):
            r = fireworks(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))
            # 增加进粒子列表里
            objects.append(r)
        # 把粒子列表增加到烟花列表
        explode_points.append(objects)
    total_time = .0
    # 在 1.8 秒工夫帧内放弃更新
    while total_time < 1.8:
        # 让画面暂停 0.01s
        sleep(0.01)
        # 刷新工夫
        tnew = time()
        t, dt = tnew, tnew - t
        # 遍历烟花列表
        for point in explode_points:
            # 遍历烟花里的粒子列表
            for item in point:
                # 更新工夫
                item.update(dt)
        # 刷新页面
        cv.update()
        total_time += dt
    root.after(wait_time, ignite, cv)

启动

if __name__ == "__main__":
    root = tk.Tk()
    # 绘制一个画布
    cv = tk.Canvas(root, height=400, width=600)
    # 背景图
    image = Image.open("bg.jpg")
    photo = ImageTk.PhotoImage(image)
    # 在画板上绘制一张图片
    cv.create_image(0, 0, image=photo, anchor='nw')
    cv.pack()
    root.protocol(close)
    root.after(100, ignite, cv)
    # 生成窗口
    root.mainloop()

看一下成果：

源码在公号 Python 小二 后盾回复 f 获取~