所以我有这个创建移动球的代码：
from Tkinter import *
from random import randrange
from threading import Thread
Matrice = (600*400)*[0]
class Ball(Frame):
def __init__(self, can, posx, posy, name):
self.can = can
self.largeur_can = int(self.can.cget("width"))
self.hauteur_can = int(self.can.cget("height"))
self.posx = posx
self.posy = posy
self.name = name
self.ball1 = self.can.create_oval(self.posy, self.posx, self.posy+10, self.posx+10, outline="red", fill=self.name, width=2)
self.nx = randrange(-10,10,1)
self.nx /= 2.0
self.ny = randrange(-10,10,1)
self.ny /= 2.0
self.move()
def move(self):
global Matrice
self.pos_ball = self.can.coords(self.ball1)
self.posx_ball = self.pos_ball[0]
self.posy_ball = self.pos_ball[1]
if self.posx_ball < 0 or (self.posx_ball + 10) > self.largeur_can:
self.nx = -self.nx
if self.posy_ball < 0 or (self.posy_ball + 10) > self.hauteur_can:
self.ny = -self.ny
self.can.move(self.ball1, self.nx, self.ny)
Matrice[int(self.posy_ball)*600 + int(self.posx_ball)] += 100
self.can.after(10, self.move)
root=Tk()
can=Canvas(root,width=600,height=400,bg="black")
for x in range(10):
x=Ball(can,100,400, "blue")
x=Ball(can,100,400, "green")
can.pack()
root.mainloop()
我会在球后面创建痕迹，我创建了一个矩阵Matrice，在其中记录了每个球的传球位置，现在我想在背景中显示它，但我不知道如何。注意：矩阵中的值可能会减少或在move. 所以有人知道我怎么能做到这一点？