Kevin, You would probably be better off using a Programmable Filter to perform this operation. It will take two inputs and produce one output that you can render directly - no need to write and read and intermediate file.
HTH, Cory On Mon, Apr 4, 2016 at 3:46 PM, Dean, Kevin <[email protected]> wrote: > Hey all, > > I have a quick question about setting scalar values with the python macro > inside paraview. > > So I have two images that I want to do scalar manipulation with. > > example code: > > from paraview import simple > > from vtk.util import numpy_support as npvtk > > > import vtk.numpy_interface.dataset_adapter as dsa > import pandas as pd > > import vtk > > > scaling_vti = simple.XMLImageDataReader(FileName=[scaling_filename]) > > scaling_rawData = simple.servermanager.Fetch(scaling_vti) > > scaling_data = dsa.WrapDataObject(scaling_rawData) > > scaling_array = > pd.DataFrame(npvtk.vtk_to_numpy(data.GetPointData().GetScalars()), columns= > ['scaling_error']) > > humans_vti = simple.FindSource(humans_filename) > > humans_vti.PointArrayStatus = ['Scattering Density'] > humans_rawData = simple.servermanager.Fetch(humans_vti) > humans_data = dsa.WrapDataObject(humans_rawData) > humans_array = > pd.DataFrame(npvtk.vtk_to_numpy(humans_data.GetPointData().GetScalars()), > columns=['scalar_intensity']) > > new_scalars = pd.DataFrame(humans_array.scalar_intensity * > scaling_array.scaling_error) > > data.GetPointData().SetScalars(npvtk.numpy_to_vtk(new_scalars)) > > > After I do this, I can bypass the pipeline (because I haven't figure out how > to use it yet) by > > writing this image to a new file then load it again to render it. > > Is there a way I can set the paraview image with the new scalar values and > have it render without > having to write it to a file first? > > Or, is there a way to convert the > vtk.numpy_interface.dataset_adapter.DataSetAttributes type back > to paraview.servermanager.FieldDataInformation? > > Thanks, > > Kevin E. Dean > > > This email and its contents are confidential. If you are not the intended > recipient, please do not disclose or use the information within this email > or its attachments. If you have received this email in error, please report > the error to the sender by return email and delete this communication from > your records. > _______________________________________________ > 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 > -- Cory Quammen R&D Engineer Kitware, Inc. _______________________________________________ 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
