[vtkusers] Animation of multiple input files in VTK

[Dominik Szczerba]

You should update your reader only from a callback function once you
have your scene/camera/etc set up...

Dominik

On Wed, Jul 6, 2011 at 10:51 AM, Tijmen Klein <T.R.Klein at student.rug.nl> wrote:
> Thank you for the reply. First of all, I'm not trying to export a animation;
> it should be realtime and allowing the user to navigate the scene.
>
> I'm currently applying the fist technique (update the reader in a loop).
> Technically this works fine, but it is really slow and also blocks the mean
> thread of the program (the program simply freezes when switching between 2
> frames). A possible solution that I came up with is the following: create N
> pipelines (up to the mapper), where N is the number of frames. This mean I
> can load the data first, create the isosurfaces and then based on the
> current time let the actor point to the corresponding mapper. This would
> mean that all the calculations are already completed.
>
> Is this a viable solution? It feels a bit hack-ish to do it like this.
>
> Tijmen
>
> On Tue, Jul 5, 2011 at 4:00 PM, Dominik Szczerba <dominik at itis.ethz.ch>
> wrote:
>>
>> There are a few possibilities. The simplest would be to update the
>> reader in a loop and dumping screen renderings. More sophisticated
>> would be to import them first into a temporal dataset and then request
>> a specific time value.
>>
>> Dominik
>>
>> On Tue, Jul 5, 2011 at 2:57 PM, Tijmen Klein <T.R.Klein at student.rug.nl>
>> wrote:
>> > I'm trying to animate multiple input files. These files are in the
>> > legacy
>> > VTK format (.vtk), and named filename[x].vtk, where [x] is an integer. A
>> > contourfilter is used to generate isosurfaces, and these isosurfaces
>> > should
>> > be animated.
>> >
>> > This is behaviour that is quite easy to achieve in Paraview (open the
>> > files,
>> > apply contour filter, choose a frame or click play). How can something
>> > similar be achieved in VTK? It should be possible to create a
>> > time-dependent
>> > animation, but also manually set the current frame. I thought of
>> > creating
>> > multiple InputReaders, and have the 'current' reader's outputport
>> > connected
>> > to the input port of the contour filter. But I think this would not be
>> > very
>> > efficient, since it's not possible to cache the results in this way.
>> > This
>> > would mean that all the calculations happen again when the animations
>> > restarts from frame 1. What would be a better solution?
>> >
>> > Cheers,
>> > Tijmen
>> >
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