# File mrplot.rb, line 126
    def inverse_transform(point)
      scale_x = 1
      scale_y = -1
      trans_x = @windowspace.x
      trans_y = @windowspace.y + @windowspace.height
      
      return Point.new((point.x-trans_x)/scale_x, (point.y-trans_y)/scale_y)
    end