[vtkusers] TemporalDataSet examples

[Gerrick Bivins]

Hi John,
I actually have the multiblock scenario working, but I have a transient set
of multiblock datasets. I'm basically trying to do what you described in the
second scenario, see the contour evolve over time. So that would be one at a
time with possibly an interpolation between each of the steps but a simple
"flipbook" type animation example would suffice. I think if I had an example
of how to set that pipeline up, I could figure the rest out, or at least get
started.
Are you referring to the vtkExtractArraysOverTime class?
http://www.vtk.org/doc/nightly/html/classvtkExtractArraysOverTime.html

gbiv == Gerrick Bivins
:)



On 6/30/08 8:52 AM, "John Biddiscombe" <biddisco at cscs.ch> wrote:

> 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