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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a question regarding the pipeline execution.<o:p></o:p></p>
<p class="MsoNormal">My pipeline consists of some computational heavy modules, which are at the end triggered by a writer module.<o:p></o:p></p>
<p class="MsoNormal">Now I want to prevent this pipeline to be executed, if the file, that is produced at the end, already exists.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So far, I’ve tried to use RequestUpdateExtent() as it is called before RequestData() and I can get the time from outInfo:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">int vtkWritePolyData::RequestUpdateExtent(vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)<o:p></o:p></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> vtkInformation *outInfo = outputVector->GetInformationObject(0);<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> std::string timeStr;<o:p></o:p></p>
<p class="MsoNormal"> if( outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP())) {<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> if(checkFileExists(outInfo) )<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> request->Remove(vtkStreamingDemandDrivenPipeline::REQUEST_DATA());<o:p></o:p></p>
<p class="MsoNormal"> outInfo->Set(vtkDemandDrivenPipeline::REQUEST_DATA_NOT_GENERATED());<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> return 1;<o:p></o:p></p>
<p class="MsoNormal">}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But the RequestData() method of my writer module is still being executed.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How can I prevent the pipeline from being executed?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best, Michael<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">--<br>
Michael Bußler, Dipl.-Inf. <br>
Visualization Research Center, Universität Stuttgart (VISUS) Allmandring 19<br>
70569 Stuttgart<br>
Germany<br>
<br>
mail: michael.bussler@visus.uni-stuttgart.de<br>
<br>
<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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