       yy[idx] = canvas_height - (y+border_bottom)
     return yy
 
-  # transform underlying device (svg) to our coordinate space
+  # transform underlying device coordinates to screen coordinates
   device_to_sx: (x) ->
     return x
   device_to_sy: (y) ->


  # vectorized versions of rxpos/rypos, these are mutating, in-place operations
  v_device_to_sx: (xx) ->
    return xx
  v_device_to_sy: (yy) ->
    canvas_height = @get('canvas_height')
    for y, idx in yy
      yy[idx] = canvas_height - y
    return yy



      , true)
    @add_dependencies('inner_range_vertical', this, ['border_bottom', 'inner_height'])

  # transform screen coordinates to underlying device coordinates
  sx_to_device: (x) ->
    return x
  sy_to_device: (y) ->
