from __future__ import division, print_function
from vpython import *

# right button mouse drag spins  (Mac: option key + mouse)
# double button mouse drag zooms  (Mac: command key + mouse)

# Setup: constants
d = 25       # adjust length of axes as needed
r = d*.008   # thickness of axes

# Setup: scene parameters
scene.background = color.white  # this makes it easier to see when projected
scene.x = scene.y = 0
scene.width = scene.height = 800
scene.forward = vector(0, 0.8, -0.5)  # look toward points we'll add
scene.range = 1.2*d                   # zoom to appropriate level

# Setup: coordinate axes w/labels
xaxis = cylinder(pos=vector(0,0,0),axis=vector(d,0,0),radius=r,color=color.red)
yaxis = cylinder(pos=vector(0,0,0),axis=vector(0,d,0),radius=r,color=color.green)
zaxis = cylinder(pos=vector(0,0,0),axis=vector(0,0,d),radius=r,color=color.blue)
label(pos=xaxis.pos+xaxis.axis,text='x',box=0)
label(pos=yaxis.pos+yaxis.axis,text='y',box=0)
label(pos=zaxis.pos+zaxis.axis,text='z',box=0)