code: def noise():
      '''a noise vector'''
      from random import gauss
      v = Vector3(gauss(0, 1), gauss(0, 1), gauss(0, 1))
      v.normalize()
      return v * args.noisf noise():
      '''a noise vector'''
      from random import gauss
      v = Vector3(gauss(0, 1), gauss(0, 1), gauss(0, 1))
      v.normalize()
      return v * args.noise
docs: a noise vector