updated code with more comments

code/util.py

@@ -1,12 +1,12 @@
-import visual as vs
-# from visual import vector as v
-from vector import Vector as v
+try:
+  import visual as vs
+  from visual import vector as v
+except ImportError:
+  from vector import Vector as vector
+
 import wx
 
 def drawAxes(frame, color, size, position):
-    # directions = (vs.vector(size, 0, 0),
-    #               vs.vector(0, size, 0),
-    #               vs.vector(0, 0, size))
     directions = (vs.vector(size, 0, 0),
                   vs.vector(0, size, 0),
                   vs.vector(0, 0, size))
@@ -21,24 +21,16 @@ def drawAxes(frame, color, size, position):
                  text=labels[i],
                  pos=origin+directions[i])
 
-# def wCoords(x, y, z):
-#   return wCoords(v(x, y, z))
-# def wCoords(p):
-#   return v(-p.x, p.y, -p.z)  
-
 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=[v(position), v(position)+v(direction).norm()*length], color = color)
+	return vs.curve(
+            frame=frame, 
+            pos=[v(position), v(position)+v(direction).norm()*length], 
+            color = color)
 	
-# def reDrawLine(line, position, length, direction):
-# 	line.pos = [position, position+direction.norm()*length]
-
-def Button(label, x, y, func, size, pan):
-   btn = wx.Button(pan, label=label, pos=(x, y), size=size)
-   btn.Bind(wx.EVT_BUTTON, func)