[vtkusers] Is VTK really no inefficient?

[tdexplorer]

Just tested vtkBlankStructuredGrid. This time the manual does not lie.  It
only works for "point attribute data" but not for "cell data".  


Najzero wrote
> 
> I am not taking sides here, but 500k cells is not so... few. So its clear
> to me that you get a bad performance using filters.
> 
> For your setBlank problem - i believed this worked right ages ago.
> 
> Boiled down this is done by vtkBlankStructuredGrid class and works like
> this:
> create vtkBlankStructuedGrid and vtkFloatArray for your Scalars
> setInput of blankStructuredGrid via your pure structuredGrid
> set min/max values for blanking in blankStructuredGrid.
> 
> An example in TCL (but I guess convertable) can be found here:
> http://public.kitware.com/cgi-bin/viewcvs.cgi/*checkout*/Graphics/Testing/Tcl/blankGrid.tcl?root=VTK&content-type=text/plain
> 
> 
> Its been ages since I had to do blanking (I simply dont write them into
> structure) so I am not sure if this bug is new
> 




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