try:
  import visual as vs
  from visual import vector as vv
except ImportError:
  from vector import Vector as vv
#   from vector import Vector as vector
  pass
from vector import Vector as v

import wx

def drawAxes(frame, color, size, position):
    directions = (vs.vector(size, 0, 0),
                  vs.vector(0, size, 0),
                  vs.vector(0, 0, size))
    labels = 'X', 'Y', 'Z'
    origin = vs.vector(position)
    for i in xrange(3):
        # vs.curve(frame=frame, color=color,
        #          pos=[origin, origin+directions[i]])
        vs.arrow(frame=frame, color=color,
                 pos=origin, axis=directions[i], shaftwidth=0.5)
        vs.label(frame=frame, color=color, box=False,
                 text=labels[i],
                 pos=origin+directions[i])

def drawLine(frame, position, length, direction, color = vs.color.white):
	'''
	Draws a straight line from given position, with given length and direction
	(all are relative to given frame)
	'''
	return vs.curve(
            frame=frame, 
            pos=[vv(position), vv(position)+vv(direction).norm()*length], 
            color = color)