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Gerrick <br>
<br>
I've been working on some aspects of this (“DATA_GEOMETRY_UNMODIFIED”
in particular), but it is not used by anyone other than me as far as I
know. DATA_GEOMETRY_UNMODIFIED would be what you want, except that<br>
1) It should be GEOMETRY_STATIC and should be set by the reader. In
your case it wouldn't be any good because if the data changed after 10
steps, then the flag is lying.<br>
2) No filters support it other than the ones I've customized for my own
needs<br>
3) I'm working on improved ways of handling this, but you won't see
anything for months, specifically, there should be a GEOMETRY_STATIC
for sources that have unchanging geometry (over time), but filters
which pass geometry through from source to sink unchanged would need a
separate key (Like GEOMETRY_UNMODIFIED, but with a better name). I
haven't settled on a stratagy that I'm happy with yet.<br>
<br>
So in short, unless you want to get quite deep into vtk internals, "no"
you can't really do what you want. <br>
<br>
I have written data into xdmf and modified the vtk read/writers to
allows me to re-use meshes over time steps - but it's not yet ready for
public consumption, when it is stable and useful, I'll let you know.<br>
<br>
Perhaps someone else out there has made some progress on this front?<br>
<br>
JB<br>
<br>
<br>
<blockquote cite="mid:C5DE9ABD.73FA%25gbivins@objectreservoir.com"
type="cite">
<title>Temporal datasets that have changing properties</title>
<font face="Calibri, Verdana, Helvetica, Arial"><span
style="font-size: 11pt;">Hi All,<br>
I have a temporal data that changes structure less frequently than the
properties on the structure. For instance in 100 timesteps the
structure may only change once every ten timesteps.<br>
Are there ways to handle this in VTK? Currently I re-create my mesh
every time step but I think I can make things faster by only changing
the properties when needed and caching the structure.<br>
I saw some posts on the developer list about setting the
“DATA_GEOMETRY_UNMODIFIED” flag but I couldn’t quite follow along.
Also,I’m still on vtk 5.2.1 rather than cvs head.<br>
<br>
Gerrick</span></font>
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<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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