李兴球Python3D效果文字
"""
3D效果文字_自定义方法版.py
本程序给Turtle类新增了addx和addy方法，
还增加了write3D这个方法，用来写3D效果文字
"""
import turtle
turtle.Turtle.addx = lambda self,dx:self.setx(self.xcor() + dx)
turtle.Turtle.addy = lambda self,dy:self.sety(self.ycor() + dy)
def _writex(self,string,bg='black',fg='blue',
align='center',move=False,font=('',16,'normal')):
"""写具有3D效果的文字"""
# 保存
oldpencolor = self.pencolor()
oldpos = self.position()
olddown = self.isdown()
oldspeed = self.speed()
olddelay = self.screen.delay(0)
self.screen.delay(0)
self.speed(0)
self.pencolor(bg)
self.penup()
self.addx(-2)
self.addy(2)
self.write(string,align=align,font=font,move=move)
self.addx(-2)
self.addy(2)
self.write(string,align=align,font=font,move=move)
self.pencolor(fg)
self.write(string,align=align,font=font,move=move)
# 恢复
self.pencolor(oldpencolor)
self.goto(oldpos)
self.speed(oldspeed)
self.screen.delay(olddelay)
if olddown:self.pendown()
turtle.Turtle.write3D = _writex
zt = ('微软雅黑',42,'normal')
string = '3D效果文字\n风火轮编程'
tom = turtle.Turtle(visible=False)
tom.penup()
tom.screen.bgcolor('yellow')
tom.write3D(string,font=zt)
tom.screen.mainloop()
