<br>Thanks Kevin for your reply and information.<div><div class="gmail_quote"><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
</div>Yes! we call it streaming.<br>
<br>
When there isn't enough RAM for even one copy of the image the<br>
trick is to make sure that the whole pipeline is streamed.<br>
<br>
Because of the "demand driven pipeline" model the end of the<br>
pipeline must ask for only pieces of the whole input.<br>
<br>
The *.vti reader, vtkXMLImageDataReader, can read the image one<br>
requested piece at a time.<br>
<br>
Does your pipeline look like reader -> filter -> writer, or<br>
reader -> filter -> renderer?<br></blockquote><div><br></div><div>I am new to vtk, and am guessing that what I want to do is not a standard vtk use case. While the vti files are used for the purpose of later visualization (eg, in ParaView) of simulation data, what I want to do here is to just get data out of the vti to feed into another simulation. In particular, I have two DataArrays in the file (position and momentum) and I want to successively read the x-y-z components. So, maybe my pipeline is only 'reader->filter' where the filter extracts two 3tuples of type Float64.</div>
<div><br></div></div>-- <br>Grant McAuley<div>Postdoctoral Fellow</div><div>Radiation Research Labs</div><div>Radiation Medicine</div><div>Loma Linda University</div><div>(909) 558-1000 Ext 85173</div><div><a href="mailto:gmcauley@llu.edu" target="_blank">gmcauley@llu.edu</a></div>
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