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You can use TemporalSnapToTimeScale to get around any problems caused
by the executive not getting it right.<br>
<br>
If it's not in CVS, then I'll commit it right away<br>
<br>
JB<br>
<br>
<br>
<blockquote cite="mid:B993F249-1426-4745-B534-224CF431028C@cs.duke.edu"
type="cite">Hello,
<br>
<br>
I've recently been using the Temporal Shift Scale filter with data
defined as having time steps every 0.1 units. In this situation, time
does not always increment or "snap" properly to the data's defined time
steps. (ParaView 3.3 cvs)
<br>
<br>
Attached is a toy data set consisting of a single point which travels
around a radius=10 circle in the XY plane over time -- VTK XML
Unstructured Grid files along with PVD files describing the time. One
PVD file has time defined in 0.1 unit steps (dt01), the other is the
same data defining time in 1.0 unit steps (dt1). Note: To easily get
the camera view correct, you might want to add a box source with sides
= 20, viewed in outline mode.
<br>
<br>
If the pipeline consists of the original data, defined on 0.1 unit time
steps, plus a Temporal Shift Scale with Shift = 0.1, and both the
original and time shifted points are being viewed, then when time is
incremented (say, though pressing the "up arrow" next to the Time
display) the points should follow each other around the circle with an
even spacing. Sometimes both points move forward properly, but
sometimes the forward one pauses and the other "catches up", and
sometimes the back one pauses and the forward one gets "ahead".
Annotate Time also does not always increment properly, either.
<br>
<br>
If you use the PVD file with 1.0 unit time steps, and a TSS filter with
shift=1.0, then this doesn't happen.
<br>
<br>
Is this to be expected with how the time-snapping works with fractional
time?
<br>
<br>
Thanks,
<br>
-Eric
<br>
<br>
P.S. Sorry I used the word "cell" in the data set name: the sim output
I'm really trying to visualize is of biological cells diffusing in
space. It's really point data on an unstructured grid.
<br>
<br>
-----------------------------------------------------
<br>
Eric E. Monson
<br>
Duke Visualization Technology Group
<br>
<br>
<br>
<br>
<br>
<br>
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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/about/BJohn.php">http://www.cscs.ch/about/BJohn.php</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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