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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">My finite element mesh is stored in a vtkMultiBlockDataSet. I use a vtkCompositeDataPipeline to process my algorithms.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Visualizing the outer surface of the mesh using vtkDataSetSurfaceFilter generates the outer surface of each block, instead of the outer surface of the entire mesh.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">In the source algorithm I can define ghost cells, but to know how many levels of ghost cells I have to generate I should be reading the UPDATE_NUMBER_OF_GHOST_LEVELS, if I understand correctly. Looking at vtkDataSetSurfaceFilter
it seems that it requests ghost cells only if UPDATE_NUMBER_OF_PIECES > 1. Similar code is in vtkFeatureEdges and several other algorithms that I use.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So it seems that I have to fool my pipeline into thinking that it processes multiple pieces, by setting UPDATE_NUMBER_OF_PIECES to >1. Is that possible at all? Should I also set other update information, like UPDATE_PIECE_NUMBER?
Where in the pipeline should I set this information? Is there an alternative way of doing this?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for your advice. Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Andreas Buykx<o:p></o:p></span></p>
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