# File vtk/gtk/GtkVTKRenderWindow.rb, line 395
  def Rotate(x,y)
    if @CurrentRenderer

      @CurrentCamera.Azimuth(@LastX - x)
      @CurrentCamera.Elevation(y - @LastY)
      @CurrentCamera.OrthogonalizeViewUp

      @LastX = x
      @LastY = y

      @CurrentRenderer.ResetCameraClippingRange
      self.Render
    end
  end