#-*- coding: utf-8 -*-#Nola

importtkinter as tkfrom PIL importImage, ImageTkfrom time importtime, sleepfrom random importchoice, uniform,randintfrom math importsin, cos, radians## 初始化tkinter 创建根部件 必须在创建其他部件之前创建 且只有一个#root = tk.Tk()## Label部件#w = tk.Label(root, text="Hello Tkinter!")## pack告诉tkinter调整窗口大小适应所用的小部件#w.pack()#root.mainloop()#模拟重力

GRAVITY = 0.05colors= [‘red‘, ‘blue‘, ‘pink‘, ‘white‘, ‘green‘, ‘orange‘, ‘purple‘, ‘seagreen‘, ‘indigo‘, ‘cornflowerblue‘]classPart(object):"""particles 类

粒子在空中随机生成，变成一个圈，下坠，消失"""

def __init__(self, cv, idx, total, explosion_speed, x=0., y=0., vx=0., vy=0., size=2., color=‘red‘, lifespan=2, **kwargs):""":param cv: 画布

:param idx: 粒子的id

:param total: 总数

:param explosion_speed: 粒子初始速度

:param x: 粒子的横坐标

:param y: 粒子的纵坐标

:param vx: 粒子在x轴上的变化速度

:param vy: 粒子在y轴上的变化速度

:param size: 大小

:param color: 颜色

:param lifespan: 最高存在时长

:param 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=lifespandefupdate(self, dt):"""粒子运动函数，膨胀

:param dt:

:return:"""self.age+=dtif self.alive() andself.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.vy = move_y / (float(dt)*1000)

self.cv.move(self.cid, move_x, move_y)

self.vx= move_x / (float(dt) * 1000)#以自由落体坠落

elifself.alive():

move_x= cos(radians(self.id*360 /self.total))

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 notNone:

self.cv.delete(self.cid)

self.cid=Nonedefalive(self):"""检查粒子是否在最高存在时长内

:return: bool"""

return self.age <= 1.2

defexpand(self):"""定义膨胀效果时间帧

:return: bool"""

return self.age <=self.lifespandefsimulate(cv):"""循环调用保持不停

:param cv: 画布

:return:"""numb_explode= randint(6, 10)

wait_time= randint(10, 100)

explode_points=[]

t=time()#为所有模拟烟花绽放的全部粒子创建一个列表

for point inrange(numb_explode):

objects=[]

x_cordi= randint(50, 550)

y_cordi= randint(50, 150)

speed= uniform(0.5, 1.5)

size= uniform(1, 3) #随机生成一个0.5-3之间的实数

color =choice(colors)

explosion_speed= uniform(0.2, 1)

total_particals= randint(5, 50)for i in range(1, total_particals):

r= Part(cv, idx=1, total=total_particals, 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)#设置每个粒子没0.01秒更新状态 生命周期1.8秒 1.6秒存活(1.2秒绽放，0.4秒坠落，0.2秒移除)

total_time =.0#在1.8秒时间帧内保持更新

while total_time < 1.8:

sleep(0.01)

tnew=time()

t, dt= tnew, tnew -tfor point inexplode_points:for item inpoint:

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

:param ignore:

:return:"""

globalroot

root.quit()if __name__ == ‘__main__‘:#初始化tkinter 创建根部件

root =tk.Tk()

cv= tk.Canvas(root, height=400, width=600)#绘制一个黑色背景

cv.create_rectangle(0, 0, 600, 600, fill=‘black‘)#使用背景图片

#image = Image.open(‘./image.png‘)

#photo = ImageTk.PhotoImage(image)

#cv.create_image(0, 0, image=photo, anchor=‘nw‘)

cv.pack()

root.protocol(‘WM_DELETE_WINDOW‘, close)#1秒后开始条约simulate()

root.after(100, simulate, cv)

root.mainloop()