#-*- 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()