This does what you are looking for: import vtk
# copy entire structure across self.GetOutputDataObject(0).ShallowCopy(self.GetInputDataObject(0,0)) # use pass arrays to extract a copy with one array of interest myArrays=vtk.vtkPassArrays() myArrays.SetInputDataObject(self.GetInputDataObject(0,0)) myArrays.ClearArrays() myArrays.AddPointDataArray('DISPL') myArrays.AddCellDataArray('') myArrays.AddFieldDataArray('') # use point2cell to operate on the one array we care about p2c = vtk.vtkPointDataToCellData() p2c.SetInputConnection(myArrays.GetOutputPort()) p2c.Update() # iterate over blocks and copy in the result iter=dsa.MultiCompositeDataIterator([p2c.GetOutputDataObject(0), output]) for in_block, output_block in iter: output_block.GetCellData().AddArray(in_block.VTKObject.GetCellData().GetArray('DISPL')) David E DeMarle Kitware, Inc. Principal Engineer 21 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-881-4909 On Mon, Apr 30, 2018 at 8:52 AM, Dennis Conklin <dennis_conk...@goodyear.com > wrote: > David, > > > > I have not called filters within the Programmable Filter before and I am > not getting things hooked up correctly. My attempt is attached. > Clearly, I do not understand how to hook the output of 1 filter to the > input of the next because I’m getting to the end and getting something with > no blocks and no cells. > > > > Any hints? > > > > Dennis > > > > > > > > > > > > *From:* David E DeMarle [mailto:dave.dema...@kitware.com] > *Sent:* Tuesday, April 10, 2018 10:14 AM > *To:* Dennis Conklin <dennis_conk...@goodyear.com> > *Cc:* Paraview (parav...@paraview.org) <parav...@paraview.org> > *Subject:* [EXT] Re: [Paraview] vtkPointDataToCellData but only for > selected PointData > > > > *WARNING - External email; exercise caution.* > > > > The pass arrays filter comes to mind. > > > > If creating withing your python programmable filter it will be called > vtk.vtkPassArrays then follow that with a vtk.vtkPointDataToCellData. > > > > > > > David E DeMarle > Kitware, Inc. > Principal Engineer > 21 Corporate Drive > Clifton Park, NY 12065-8662 > Phone: 518-881-4909 > > > > On Tue, Apr 10, 2018 at 10:07 AM, Dennis Conklin < > dennis_conk...@goodyear.com> wrote: > > All, > > > > Well, this list solved my problem so easily (and made me feel slightly > less than the sharpest pencil in the box) yesterday, so I thought I’d try > again. > > > > I am doing some Python calcs inside a programmable filter and some of the > results I want to average from the Points onto the Cells. But, I don’t > want all my PointData moved over to CellData – I want to transfer some of > them over within my Filter. > > > > Right now I’m looping thru all the elements and finding all their nodes, > then averaging them and assigning to the cells. It is dog slow and is > choking off the usefulness of this filter. > > > > Is there anything like vtkPointDataToCellData that lets me specify which > quantities to convert – could I do something tricky like store original > list of PointData, make up a new list, then run PointDataToCellData, then > restore the list of PointData ?? > > > > I realize this may have all sorts of unexpected side effects, so I’m just > asking! > > > > Thanks again, this group is great! > > > > Dennis > > > _______________________________________________ > Powered by www.kitware.com > <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kitware.com&data=01%7C01%7Cdennis_conklin%40goodyear.com%7Ccdd327b7b83443c9224908d59eed5011%7C939e896692854a9a9f040887efe8aae0%7C0&sdata=bFpbI9%2F4eHwIrhf5Sd9f2ynzY%2FvWHiDIlONgpO13J0A%3D&reserved=0> > > Visit other Kitware open-source projects at http://www.kitware.com/ > opensource/opensource.html > <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kitware.com%2Fopensource%2Fopensource.html&data=01%7C01%7Cdennis_conklin%40goodyear.com%7Ccdd327b7b83443c9224908d59eed5011%7C939e896692854a9a9f040887efe8aae0%7C0&sdata=mMExlGeMQKwAob7IUdPyH60WLz420BhmCRMs%2Fp8aLf4%3D&reserved=0> > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fparaview.org%2FWiki%2FParaView&data=01%7C01%7Cdennis_conklin%40goodyear.com%7Ccdd327b7b83443c9224908d59eed5011%7C939e896692854a9a9f040887efe8aae0%7C0&sdata=Myi6SWCBnXGSlGEpOScpW0tc83nT6ue%2FjmtzC9G%2FafE%3D&reserved=0> > > Search the list archives at: http://markmail.org/search/?q=ParaView > <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmarkmail.org%2Fsearch%2F%3Fq%3DParaView&data=01%7C01%7Cdennis_conklin%40goodyear.com%7Ccdd327b7b83443c9224908d59eed5011%7C939e896692854a9a9f040887efe8aae0%7C0&sdata=EjvocgHSmoROe1cbBbTsWfGgqv8v1dZM10sKupDOaQQ%3D&reserved=0> > > Follow this link to subscribe/unsubscribe: > https://public.kitware.com/mailman/listinfo/paraview > <https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpublic.kitware.com%2Fmailman%2Flistinfo%2Fparaview&data=01%7C01%7Cdennis_conklin%40goodyear.com%7Ccdd327b7b83443c9224908d59eed5011%7C939e896692854a9a9f040887efe8aae0%7C0&sdata=tfp1j3M04VCMkOFcmkMdKNLgIKDJUYvgEupl18nNQeE%3D&reserved=0> > > >
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