[Visualpython-users] Vpython animations

[Symion <sy...@pr...>]

Hi there.
    Here is a short python program that draws a simple face with roving 
eyes. As you right mouse the image, the eyes follow you.
Change the position of the eyes with the cursor keys.

Next step is to develop a topographic head with moving eyelids and 
eyebrows, then a little more work on the mouth and hey presto - A 
robotic head!

Demonstrates how easy Vpython is to use.

My Wish List:
    Figure out how to use the *scene.lights* function, so that orbiting 
objects are illuminated from a single source.
 i.e. Planets orbiting the Sun must change the angle of illumination.
    I've tried a few ideas but so far nothing works!
Does anyone have a solution?

Cheers Symion

from __future__ import division
from visual import *
from random import *
print '''Crazy Eyeballs -(c) Symion 2008

   Use cursor keys to control eye position and width'''

class eyeball:
   def __init__(self,p=(0,0,0),r=1.0,c=[(1,0,0)]*6,a=(0,1,0)):
      self.pos=p
      self.radius=r
      self.color=c
      self.axis=a
      self.eye=frame()
      sphere(frame=self.eye,pos=p,radius=r,axis=a,color=c[0])
      for a in range(1,6):
         
sphere(frame=self.eye,pos=vector(scene.objects[-1].pos.x+scene.objects[-1].radius/1.618,scene.objects[-1].pos.y,scene.objects[-1].pos.z),radius=scene.objects[-1].radius/1.618,color=c[a])

   def look(self,k=True,s=1.0):
      if k==True and s!=0:
         self.eye.rotate(angle=((2*pi)/s))
      
      self.eye.axis=(scene.mouse.camera-self.eye.pos)

##
d=[(3,3,3)]
for a in range(1,5):
   d.append((uniform(0,1),uniform(0,1),uniform(0,1)))

d.append((0,0,0))
## Initialize Display
scene.autoscale=0
scene.title='Crazy EyeBalls - (c) 2008 Symion'
scene.background=(0,0.1,0.2)
scene.ambient=0.5
## Begin
eyesize=1.4
lefteye=eyeball(p=(0,0,0),r=eyesize,a=(1,0,0),c=d)
rhyteye=eyeball(p=(0,0,0),r=eyesize,a=(1,0,0),c=d)
## Draw Face - Eyebrows
box(pos=(0,5,-3),length=4,width=1,height=1,axis=(-1,-1,2),color=(0.4,0.4,0.4))
obj=scene.objects
box(pos=vector(obj[-1].pos.x+1.5,obj[-1].pos.y,obj[-1].pos.z-3),length=3,width=1,height=1,axis=(-1,1,2),color=(0.4,0.4,0.4))
box(pos=(0,5,3),length=4,width=1,height=1,axis=(1,1,2),color=(0.4,0.4,0.4))
obj=scene.objects
box(pos=vector(obj[-1].pos.x+1.5,obj[-1].pos.y,obj[-1].pos.z+3),length=3,width=1,height=1,axis=(1,-1,2),color=(0.4,0.4,0.4))
## Nose
box(pos=vector(-1,0,0),length=5,width=1,height=1,axis=(.5,1,0),color=(1,1,1))
obj=scene.objects
box(pos=vector(obj[-1].pos.x-.5,obj[-1].pos.y-1.8,obj[-1].pos.z),length=1,width=3,height=1,axis=(0,1,0),color=(1,1,1))
obj=scene.objects
## Lips
box(pos=vector(obj[-1].pos.x,obj[-1].pos.y-3,obj[-1].pos.z),length=.5,width=4,height=.8,color=(1,0,0))
box(pos=vector(obj[-1].pos.x,obj[-1].pos.y-2,obj[-1].pos.z),length=.5,width=5,height=.5,color=(1,0,0))
## Position Eyes
lefteye.eye.pos=(0,2.0,-2.5)
rhyteye.eye.pos=(0,2.0, 2.5)
## Select viewing angle
scene.forward=vector(14.1868312021088, -3.63010737884212, 
0.00013678986975335)
scene.range=vector(8,8,8)
scene.fov=1

while 1:
   rate(100)
   lefteye.look(20)
   rhyteye.look(20)
   
   if scene.kb.keys>0:
      kb=scene.kb.getkey()
      if kb=='down':
         lefteye.eye.pos.y-=0.5
         rhyteye.eye.pos.y-=0.5
      elif kb=='up':
         lefteye.eye.pos.y+=0.5
         rhyteye.eye.pos.y+=0.5
      elif kb=='left':
         lefteye.eye.pos.z-=0.5
         rhyteye.eye.pos.z+=0.5
      elif kb=='right':
         lefteye.eye.pos.z+=0.5
         rhyteye.eye.pos.z-=0.5
      else:
         pass
   else:
      pass