Guillaume, Use data information [1] as follows:
UpdatePIpeline(inputPvts) extent = inputPvts.GetDataInformation().GetExtent() See Section 3.3 from the ParView Guide[2] for more details. Utkarsh [1] http://www.paraview.org/ParaView3/Doc/Nightly/www/cxx-doc/classvtkPVDataInformation.html [2] http://www.paraview.org/paraview-guide/ On Tue, May 26, 2015 at 8:07 AM, Guillaume Duclaux <[email protected]> wrote: > Hi, > > I’ve been using a python script to post-process and visualise large > structured grid files. It works great but the grids I am visualising are of > different dimensions (let say either 512x128x512, or 1024x256x1024). > > In the script pipeline - see snippet below - I extract a subset (top cell > layer in the Y direction) from the whole dataset, using ExtractSubset filter. > > At this stage for the 2 input files dimensions above, I need to modify the > script and correctly set extractSubset1.VOI values manually. > > Is there a method that I could use in the script to get the dimensions (or > extent) of the structured grid, so I can make the script extract the top > layer I’m interested in for any grid dimension? > > > <snip> > from paraview.simple import * > > inputPvts = XMLPartitionedStructuredGridReader(FileName=[fname]) > inputPvts.PointArrayStatus = ['velocity'] > > # get active view > renderView1 = GetActiveViewOrCreate('RenderView') > renderView1.ResetCamera() > > #get the 4 uppermost cells > extractSubset1 = ExtractSubset(Input=inputPvts) > extractSubset1.VOI = [0, 512, 127, 128, 0, 512] > extractSubset1.SampleRateI = 1 > extractSubset1.SampleRateJ = 1 > extractSubset1.SampleRateK = 1 > extractSubset1.IncludeBoundary = 0 > doCoolStuff... > </snip> > > So far, I’ve tried reading the VOI from the extractSubsetFilter, but the > indexing of the extent is not showing the grid dimensions: > > dimensions = extractSubset1.GetPropertyValue('VOI') > print dimensions > > But that returns an array [0, -1, 0, -1, 0, -1]. And I can’t seem to be able > to use relative indexes in the filter like: extractSubset1.VOI = [0, -1, -2, > -1, 0, -1]. > > Any thoughts? > > Cheers > > Guillaume > > > > > > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Search the list archives at: http://markmail.org/search/?q=ParaView > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
