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P1, P2, P3 and max_shear are each just scalar numbers (value of Principal strains) - the P1[] is just a value for each element in the block Dennis Conklin, PE RDE&Q Principal Engineer Goodyear Innovation Center, 5th Floor South, Pillar M34 Phone: 330-796-5701 Email: dennis_conk...@goodyear.com ________________________________ From: Casey Goodlett <casey.goodl...@kitware.com> Sent: Tuesday, August 12, 2014 5:26 PM To: Dennis Conklin Cc: paraview@paraview.org Subject: Re: [Paraview] Help with Programmable Filter Hi Dennis, I took a look at the filter to see what might be wrong, but I seem to be missing a couple of things: 1) Are you using the "Copy Arrays" option of the programmable filter? Otherwise you will need to reference the input data as well. 2) Where are the P1,P2,P3, etc vectors created? What type are they? The below script worked for me if Copy Arrays is enabled. I used the can.ex2 example dataset from paraview and ensured the "Object Ids" cell data was selected in the reader. for oblock in output: oid = oblock.CellData['ObjectId'] o2 = oid + 10 oblock.CellData.append(o2, 'newdata') Hope that helps On Mon, Aug 4, 2014 at 3:21 PM, Dennis Conklin <dennis_conk...@goodyear.com<mailto:dennis_conk...@goodyear.com>> wrote: I have the following script for a Paraview Programmable filter: import math import numpy # # Gdyr_Principal_Strains_ProgFilter # Rev 0 # Aug 1, 2014 # Dennis Conklin - Engineering Mechanics # # Paraview 4.0.1 Progammable Filter # Adds Cell Variables: # Principal Strains: str_P1, str_P2, str_P3 # max shear strain: tau_max # These can be used for coloring, Spreadsheet view, formulas, threshold, etc # def process_block(block): # # Global coordinate strains # Assume strains loaded in Paraview xx = block.CellData['USTRTOTXX'] yy = block.CellData['USTRTOTYY'] zz = block.CellData['USTRTOTZZ'] xy = block.CellData['USTRTOTXY'] xz = block.CellData['USTRTOTZX'] yz = block.CellData['USTRTOTYZ'] for i in range(block.GetNumberOfCells() sigma = numpy.array([ [xx[i],xy[i],xz[i]], [xy[i],yy[i],yz[i]], [xz[i],yz[i],zz[i]] ]) # isotropic strain matrix iso = 1.0/3.0*numpy.trace(sigma)*numpy.eye(3) # deviatoric strain matrix dev = sigma - iso #principal strains eigvals = list(numpy.linalg.eigvalsh(sigma)) eigvals.sort() eigvals.reverse() P1[i] = eigvals[0] P2[i] = eigvals[1] P3[i] = eigvals[2] # max shear max_shear[i] = (max(eigvals)-min(eigvals))/2.0 block.CellData.append(P1,"P1_strain") block.CellData.append(P2,"P2_strain") block.CellData.append(P3,"P3_strain") block.CellData.append(max_shear,"tauMax") # Loop over blocks in composite (Exodus) data set for block in output: # process each block process_block(block) After running this script, no errors or warnings are issued but the additional quantites (taumax, Px_strain) are not present as element quantities. Any hints as to what I'm doing wrong. Dennis Conklin, PE RDE&Q Senior Engineer Goodyear Innovation Center, 5th Floor South, Pillar M34 Phone: 330-796-5701<tel:330-796-5701> Email: dennis_conk...@goodyear.com<mailto:dennis_conk...@goodyear.com> _______________________________________________ Powered by www.kitware.com<http://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 Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview -- Casey B. Goodlett, Ph.D. Technical Leader Kitware, Inc. - North Carolina Office http://www.kitware.com (919) 969-6990 x310
_______________________________________________ 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 Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
