Tkinter -弹跳图标脚本

Question

我正在写一个简单的弹跳图标程序(Python3.7，Windows10 x64)来体验一下Tkinter和canvases。我已经在下面发布了我的代码。我对这个程序的问题是它会剪切图标的边缘(在运动方向上)。如果我稍微放慢运动(通过增加after方法中的值)，它不再剪切，但运动是断断续续的。也许我想得太多了，它基本上实现了我的目标。但是，如果这是一个重要的游戏或其他项目，如何防止这种情况？

from tkinter import *
import os
from PIL import Image, ImageTk

xinc, yinc = 5, 5

def load_image(width, height, imgpath):
    loadimg = Image.open(imgpath)
    pwid, phi = loadimg.size
    pf1, pf2 = 1.0*width/pwid, 1.0*height/phi
    pfactor = min([pf1, pf2])
    pwidth, pheight = int(pwid*pfactor), int(phi*pfactor)
    loaded = loadimg.resize((pwidth, pheight), Image.ANTIALIAS)
    loaded = ImageTk.PhotoImage(loaded)
    return loaded

def bounce():
    global xinc
    global yinc
    cwid = int(dash.cget('width'))
    chi = int(dash.cget('height'))
    x = dash.coords(dashposition)[0]
    y = dash.coords(dashposition)[1]
    if x > cwid-10 or x < 10:
        xinc = -xinc
    if y > chi-10 or y < 10:
        yinc = -yinc
    dash.move(dashposition, xinc, yinc)
    dash.after(15, bounce)

root = Tk()
root.configure(bg='black')

dash = Canvas(root, bg='black', highlightthickness=0, width=400, height=300)
dash.grid(row=0, column=0, padx=2, pady=2)

imagepath = os.getcwd() + '/img/cloudy.png'
image = load_image(20, 20, imagepath)

x, y = 10, 10
dashposition = dash.create_image(x, y, anchor=CENTER, image=image, tags=('current'))

bounce()

root.mainloop()

cloudy.png