<div dir="ltr"><div><div><div><div>So I got a little further. Instead I used a multi block data set to load my polydata(s). When i update my pipeline, all the information gets transferred to ParaView except for the block data. I set up a writer that records the data, and that information is exactly the same as the streaming data (but it can actually render the blocks). So, I guess you could say I am perplexed, ha. Do you have any suggestions?<br><br></div>Thanks Man!<br><br></div>Kevin E. Dean<br><br></div>here's the snippet:<br><br>void MultiBlockDataSetDDSReader::UpdatePipeline(vtkMultiBlockDataSet* mb)<br>{<br> printf("%s\n", __PRETTY_FUNCTION__);<br><br> MultiBlockDataSetDDSReader::UpdateInformation();<br> vtkStreamingDemandDrivenPipeline* executive = vtkStreamingDemandDrivenPipeline::SafeDownCast(MultiBlockDataSetDDSReader::GetExecutive());<br><br> this->multi_block = mb;<br><br> for (int i = 0; i < this->multi_block->GetNumberOfBlocks(); i++)<br> {<br> executive->SetUpdateExtent(0, i, this->multi_block->GetNumberOfBlocks(), 0);<br> MultiBlockDataSetDDSReader::Update();<br> }<br>}<br><br></div>and my request data:<br>/*----------------------------------------------------------------------------*/<br>int MultiBlockDataSetDDSReader::RequestData(<br> vtkInformation *vtkNotUsed(request),<br> vtkInformationVector **inputVector,<br> vtkInformationVector *outputVector)<br>{<br> printf("%s\n", __PRETTY_FUNCTION__);<br> vtkInformation* outInfo = outputVector->GetInformationObject(0);<br> vtkMultiBlockDataSet *output = vtkMultiBlockDataSet::GetData(outputVector);<br><br> if (this->multi_block != NULL)<br> {<br> output->ShallowCopy(this->multi_block);<br><br> vtkStreamingDemandDrivenPipeline::CONTINUE_EXECUTING();<br> }<br><br> return 1;<br>}<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jun 26, 2015 at 9:30 AM, Dean, Kevin <span dir="ltr"><<a href="mailto:kevin.dean@decisionsciencescorp.com" target="_blank">kevin.dean@decisionsciencescorp.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>Ok, so I looked through this yesterday and tried implementing some of the code. I now have the poly data information (# of cells, # of points, and Bounds updating in ParaView) However, for poly data objects to be rendered (and their data arrays to be copied to the output), is the best way to set the update extents by:<br><br></div>executive->SetUpdateExtent( vtkInformation *, int piece, int numPieces, int ghostLevel );<br><br></div><div>I'm not that familiar with updating unstructured datasets. Image data is simple because the extents are based off the size of the image. Also, for understanding the description of "pieces", since they are subsets of unstructured datasets, does a piece correspond to individual cells or other information held within the poly data? And just one more question, is there a good place to find an explanation of what is / how to set up a PRODUCER, because I read that the producer determines what a piece means...<br></div><div><br></div>Thanks for the help!<span class="HOEnZb"><font color="#888888"><br><br></font></span></div><span class="HOEnZb"><font color="#888888">Kevin<br></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 25, 2015 at 6:42 AM, Utkarsh Ayachit <span dir="ltr"><<a href="mailto:utkarsh.ayachit@kitware.com" target="_blank">utkarsh.ayachit@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">RequestData doesn't get called unless the pipeline determines that something has changed. This is at core of VTK's demand driven execution pipeline. You may want to checkout Berk's blog (<a href="http://www.kitware.com/blog/home/post/831" target="_blank">http://www.kitware.com/blog/home/post/831</a>) about how you can use `CONTINUE_EXECUTING` key for "streaming".<div><br></div><div>Utkarsh</div></div><br><div class="gmail_quote"><div><div><div dir="ltr">On Wed, Jun 24, 2015 at 2:32 PM Dean, Kevin <<a href="mailto:kevin.dean@decisionsciencescorp.com" target="_blank">kevin.dean@decisionsciencescorp.com</a>> wrote:<br></div></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr"><div><div><span style="font-family:monospace,monospace">I was wondering if anyone has run into this problem before. I am streaming vtkPolyData objects into ParaView, but for some reason (after my UpdatePipeline function is called), the executive does not call RequestData upon an Update command. Could there be any reasons for this?<br><br></span></div><span style="font-family:monospace,monospace">Here is my snippet:<br><br><span style="color:rgb(116,27,71)"><b>void</b></span> <b>VTKPolyDataObjectsDDSReader::UpdateMyPipeline</b>(<span style="color:rgb(56,118,29)">vtkPolyData</span>* poly_data)<br>{<br></span></div><span style="font-family:monospace,monospace"> <span style="color:rgb(56,118,29)">// DEBUG:</span><br></span><div><span style="font-family:monospace,monospace"> <span style="color:rgb(56,118,29)">// printf("%s\n", __PRETTY_FUNCTION__);</span><br><br> <span style="color:rgb(56,118,29)">VTKPolyDataObjectsDDSReader</span>::<b><span style="color:rgb(153,0,255)">UpdateInformation</span></b>();<br> <span style="color:rgb(56,118,29)">vtkStreamingDemandDrivenPipeline</span>* executive = <span style="color:rgb(56,118,29)">vtkStreamingDemandDrivenPipeline</span>::<i>SafeDownCast</i>(<span style="color:rgb(56,118,29)">VTKPolyDataObjectsDDSReader</span>::<span style="color:rgb(153,0,255)"><b>GetExecutive</b></span>());<br><br> <b><span style="color:rgb(116,27,71)">if</span></b> (!executive)<br> {<br> <b><span style="color:rgb(116,27,71)">return</span></b>;<br> }<br><br> <b><span style="color:rgb(116,27,71)">this</span></b>-><span style="color:rgb(0,0,255)">poly_data</span> = poly_data;<br><br> <span style="color:rgb(116,27,71)"><b>for</b></span> (<span style="color:rgb(116,27,71)"><b>int</b></span> i = 0; i < <span style="color:rgb(116,27,71)"><b>this</b></span>-><span style="color:rgb(0,0,255)">poly_data</span>-><span style="color:rgb(153,0,255)"><b>GetNumberOfPieces</b></span>(); i++)<br> {<br> executive-><span style="color:rgb(153,0,255)"><b>SetUpdateExtent</b></span>(0, i, <span style="color:rgb(116,27,71)"><b>this</b></span>-><span style="color:rgb(0,0,255)">poly_data</span>-><span style="color:rgb(153,0,255)"><b>GetNumberOfPieces</b></span>(), 0);<br> <span style="color:rgb(106,168,79)">VTKPolyDataObjectsDDSReader</span>::<span style="color:rgb(153,0,255)"><b>Update</b></span>();<br> }<br>}</span><br><br></div><div>Any help is appreciated! Thanks guys.<br><br></div><div>Kevin E. Dean<br><br></div><div>P.S. - also attached is a screenshot of what some of the output looks like.<br></div></div>
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