/// <summary>
/// Exports the specified viewport.
/// Exports model, camera and lights.
/// </summary>
/// <param name="viewport">
/// The viewport.
/// </param>
public virtual void Export(Viewport3DX viewport)
{
this.ExportHeader();
this.ExportViewport(viewport);
// Export objects
viewport.Traverse <GeometryModel3D>(this.ExportModel);
// Export camera
//this.ExportCamera(viewport.Camera);
// Export lights
//viewport.Children.Traverse<Light>(this.ExportLight);
}