[Paraview] optional display at load time

[Jean M. Favre]

I have many models composed of multiple outputs:
	a) 3D cells which I never want to display
	b) 2D cells which are the boundary parts of the model

The boundary parts are all the external parts (or specific boundary 
conditions) of the model and as such are most often interesting to display.

The volumetric parts (3D cells) are only used in cutting, contouring, 
streamlines, etc. and should not be displayed. However, when read in 
ParaView, they are automatically passed thru vtkPVGeometryFilter (or 
vtkDataSetSurfaceFilter). I am not sure which one and when actually. In 
any case, this can be a very expensive computation (I am talking here of 
volumetric models of 1-100 millions cells) and it is a complete waste of 
resources since the external faces extracted are redundant with the 
already present 2D bondary cells.

My reader create in the order of a few hundreds of outputs, each with a 
well-defined name. Using Extract Parts, I can easily select my 2D cells 
for display.

When programming directly in C++ or via the wrapping languages 
interfaces, I can skip the extraction of external surfaces of the 3D 
cells. Can the same be done in ParaView? What I would like is a default 
of "no display, thus no extraction at all".

Since ParaView is an application "designed with the need to visualize 
large data sets in mind", it seems like this should be available.

Any hints?
TIA

-- 
Dr. Jean M. Favre,                            email:favre  at  cscs.ch
http://www.cscs.ch/people/Favre.html
CSCS, Swiss Center for Scientific Computing | Tel:  +41 (91) 610.82.40
Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82