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Martin <br>
<br>
A single timestep is a vtkDataSet, StremTracer generates streamline
through a vector field for this data.<br>
The ParticleTracer requires multiple time steps to advect particles
through the field over time. <br>
The particle tracer requests 2 time steps per iteration from it's
input, internally paraview converts multiple vtkDataSets from the input
into a TemporalDataSet.<br>
<br>
JB<br>
<blockquote
cite="mid:25882.146.232.65.6.1234341177.squirrel@webmail.student.lth.se"
type="cite">
<pre wrap="">Thanks you, I can now conenct the two sources. I tried on Windows and
found this alternative if I want to use "input" or "source" in the
particle tracer. When choosing "source" I could select both dataset and
seed source. Problem on my Mac was that the dialog box was to small so I
didnt find this option.
Btw what is the difference between vtkTemporalDataSet and vktDataSet?
ParticleTracer requires vktDataSet which I dont have, is it possible to
convert the dataset somehow.
I can use filter StreamTracer on my dataset and because StreamTracer and
ParticleTracer is based on the same physics, I should be able to visualize
particles.
ERROR: In
/Users/kitware/Berk/ParaView3/VTK/Filtering/vtkDemandDrivenPipeline.cxx,
line 822
vtkCompositeDataPipeline (0x225e2020): Input for connection index 0 on
input port index 1 for algorithm vtkTemporalStreamTracer(0x225e20b0) is of
type vtkMultiBlockDataSet, but a vtkDataSet is required.
Cheers,
Martin Uppman
</pre>
<blockquote type="cite">
<pre wrap="">Can you tell us exactly (detailed, step-by-step) what you are doing?
That dialog works fine for me (running OS X 10.5).
-berk
On Tue, Feb 10, 2009 at 4:10 AM, Martin Uppman <a class="moz-txt-link-rfc2396E" href="mailto:f04mu@student.lth.se"><f04mu@student.lth.se></a>
wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi again,
thank you for fast answer John! I'm aware of the problem that my
particle
tracer doesnt have any seed source, but I have been working for quite
awhile sloving this problem. I did as you said, created temporalcache
and
seed (point seed) but I cant connect the 2 with my particle tracer. I
found your (John's) great powerpoint presentation on the web explaining
everything there is to explain. Though I cant make it work!!! In one of
the pictures in the presentation there are some boxes where you can
choose
which sources to use in the particle tracer (in object inspector ->
properties -> source). I dont have that option in my program. Does
someone
know why (using v3.4.0 on a Mac)?
About v3.4.0, isnt it the lastest version? Cant fint anything newer on
paraview.org.
Cheers,
Martin Uppman
</pre>
<blockquote type="cite">
<pre wrap="">Martin
</pre>
<blockquote type="cite">
<pre wrap="">ERROR: In
/Users/kitware/Berk/ParaView3/VTK/Filtering/vtkDemandDrivenPipeline.cxx,
line 722
vtkCompositeDataPipeline (0x217c7fb0): Input port 1 of algorithm
vtkTemporalStreamTracer(0x1e345e00) has 0 connections but is not
optional.
</pre>
</blockquote>
<pre wrap="">Input 0 should be a time dependent dataset. It is best to use a
TemporalCache before the particle tracer to stop multiple updates for
the same time step. Input 1 should be some seed points.
Ensight -> TemporalCache ->
ParticleTracer
Some Other data eg.line/plane ->
the ignore pipeline time option is provided to get around some
animation
issues that used to plague paraview. You should not need it, but the
correct way to use it, is set IgnorePipelineTime to true, then set an
animation keyframe to animate TimeStep from 0->N - the particle tracer
will then use the timestep to generate update times for the Ensight
input, instead of usigin the GUI generated time.
If you are using the particle tracer from prior to 3.4 then you should
switch to a newer one as it is contiunually being improved. I will soon
(months, not days) be checking in a lot of changes which enable it to
handle dynamic meshes better.
JB
</pre>
<blockquote type="cite">
<pre wrap="">I've been looking for information on this and a found a thread which I
think concerns the same problem. In that thread Berk made a patch to
fix
this problem.
I also tried to ignore pipeline time, but this doent work. I'm working
with .case files and I want to animate the blood flow in a human heart
using particle tracers. I'm using a Mac with ParaView version 3.4.0.
Thanks for looking into this.
Cheers,
Martin Uppman
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<pre wrap="">
--
John Biddiscombe, email:biddisco @ cscs.ch
<a class="moz-txt-link-freetext" href="http://www.cscs.ch/">http://www.cscs.ch/</a>
CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82
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<pre wrap="">
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<pre wrap=""><!---->
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<br>
<br>
<pre class="moz-signature" cols="78">--
John Biddiscombe, email:biddisco @ cscs.ch
<a class="moz-txt-link-freetext" href="http://www.cscs.ch/">http://www.cscs.ch/</a>
CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07
Via Cantonale, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82</pre>
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