python海龟3D世界坐标轴
"""
3D世界坐标轴.py
"""
__author__ = '李兴球'
__blog__ = 'www.lixingqiu.com'
import turtle
import time
viewfactor = 150
xshift = 0
yshift = 0
zshift = 50
def gotoxyz(x,y,z):
global viewfactor,xshift,yshift,zshift
if (z+zshift) == 0 : return
xcor = viewfactor * (x+xshift)/(z+zshift)
ycor = viewfactor * (y+yshift)/(z+zshift)
turtle.goto(xcor,ycor)
turtle.pensize(2)
turtle.speed(0)
turtle.delay(0)
turtle.penup()
turtle.ht()
turtle.title('3D世界坐标轴by李兴球')
turtle.tracer(0)
oldx = None
oldy = None
def shift(event):
global oldx,oldy,xshift,yshift
if oldx==None:oldx = event.x # 第一次
if oldy==None:oldy = event.y # 第一次
dx = event.x - oldx
dy = event.y - oldy
oldx = event.x
oldy = event.y
xshift += dx
yshift -= dy
def fov(event):
global viewfactor
viewfactor += event.delta/60
canvas = turtle.getcanvas()
canvas.bind("",shift)
canvas.bind("",fov)
turtle.bgcolor('black')
while True:
turtle.clear()
gotoxyz(0,0,0) # 到圆点
turtle.pendown()
turtle.color('red')
gotoxyz(300,0,0) # x轴
turtle.penup()
gotoxyz(0,0,0) # 到圆点
turtle.pendown()
turtle.color('blue')
gotoxyz(0,300,0) # y轴
turtle.penup()
gotoxyz(0,0,0) # 到圆点
turtle.pendown()
turtle.color('yellow')
gotoxyz(0,0,300) # z轴
turtle.penup()
turtle.update()
time.sleep(0.1)
