[vtkusers] TemporalDataSet examples

[John Biddiscombe]

gbiv (?)

> Hello,
> I've been digging into the docs on Temporal data sets and I've tried looking
> over some of the referring samples in the Test directories but I can't seem
> to find any examples that do vis of temporal datasets. For example, If I
> load up 3 vtk files and create a TemporalDataset, how do I set up a pipeline
> to render an isovalue contour over the span of the the three timesteps? 
> biv
>   
The TemporalDataSet structure is really intended to act as a holder for 
a pipeline that operates over datasets in sequential order (generally 
within a framwork like paraview where the pipeline is being iterated in 
some way).

Am I to understand that you want to see the contours of all 3 time steps 
superimposed on top of each other? If this is what you want, then 
replace your vtkTemporalDataSet with a vtkMultiBlockDataSet and then run 
the contour filter over it. It will run 3 times (in your case) and 
append the results into a new multiblock structure holding all the 
contours. You can then render this in the usual manner using a 
multiblock polydata mapper etc etc.

If you wanted to go down the Temporal path, then you'd need to create a 
simple filter the executed the contour and iterated the pipeline 
manually by setting the CONTINUE_EXECUTING information key (something 
like vtkExtractSomthingOverTime does this, can't remember the name).

If this is a one off job, then the multiblock holder might be easier for 
you to use.

JB

-- 
John Biddiscombe,                            email:biddisco @ cscs.ch
http://www.cscs.ch/about/BJohn.php
CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82