     super()
     window.render_count +=1
     #console.log("render #{@plotnum}", window.render_count)
-    
+
     #newtime = new Date()
     # if @last_render
     #   console.log(newtime - @last_render)


  map_to_screen : (x, x_units, y, y_units, units) ->
    if x_units == 'screen'
      sx = x[..]
      sy = y[..]
    else
      [sx, sy] = @mapper.v_map_to_target(x, y)


    plot10.update_range({sdx:1, sdy:2, xr:{end:20, start:0}, yr:{start:-3, end:30}})), 600)
  end_time = new Date()
  console.log(end_time - start_time, "ms")

