[vtkusers] possible to write actors to file?

[N. Yang]

Dear all, 

i am wondering if i can use some writer object to write an actor that 
has set a certain mapper to a file(binary, ascii)?

example:

  public static void main (String[] args)
  {
	vtkSphereSource sphere = new vtkSphereSource();
	sphere.SetRadius(1.0);
	sphere.SetThetaResolution(18);
	sphere.SetPhiResolution(18);

	vtkPolyDataMapper map = new vtkPolyDataMapper();
	map.SetInput(sphere.GetOutput());

	// actor coordinates geometry, properties, transformation
	vtkActor aSphere = new vtkActor();
	aSphere.SetMapper(map);
	aSphere.GetProperty().SetColor(0,0,1); // color blue

--------some writer object is applicable here?

	// a renderer for the data
	vtkRenderer ren1 = new vtkRenderer();
	ren1.AddActor(aSphere);
	ren1.SetBackground(1,1,1); // background color white