Hi Richard, Since you didn't specify the version you are using I'm using 5.4-RC3 for this answer. I loaded a dataset and ran the Python Trace (Tools -> Start Trace) to find out what it is doing. Here is the python script that was generated from changing what the dataset was colored by.
# get active source. canex2 = GetActiveSource() # get active view renderView1 = GetActiveViewOrCreate('RenderView') # uncomment following to set a specific view size # renderView1.ViewSize = [1330, 670] # get display properties canex2Display = GetDisplayProperties(canex2, view=renderView1) # set scalar coloring ColorBy(canex2Display, ('POINTS', 'VEL', 'Magnitude')) # get color transfer function/color map for 'vtkBlockColors' vtkBlockColorsLUT = GetColorTransferFunction('vtkBlockColors') # Hide the scalar bar for this color map if no visible data is colored by it. HideScalarBarIfNotNeeded(vtkBlockColorsLUT, renderView1) # rescale color and/or opacity maps used to include current data range canex2Display.RescaleTransferFunctionToDataRange(True, False) # show color bar/color legend canex2Display.SetScalarBarVisibility(renderView1, True) # get color transfer function/color map for 'VEL' vELLUT = GetColorTransferFunction('VEL') It is hiding the scalar bar for vtkBlockColors since that is what the data used to be colored by. I think your problem will be solved by using the GetDisplayProperties and ColorBy functions rather than setting ColorArrayName. HTH, Shawn On Sat, May 27, 2017 at 1:35 PM, Richard Kalhoefer < kalhoe...@physik.uni-kiel.de> wrote: > Hey, > > I have a python script that opens a Legacy VTK file that contains two > scalar arrays of the same length (real and imaginary part of a wave > function) and then adjusts the camera settings, representation and color. > My transfer functions seem to be ignored and I just get full opacity and > black color. Running the script inside the GUI's python shell gives the > same result, but when I then change the array under Display->Coloring to > the other one and back again. everything looks as expected. So my question > is: What is this GUI element doing beyond "GetRepresentation(reader, > view).ColorArrayName = ['POINTS', arrayname]" and how can I do the same > within the python script? > > Kind regards > Richard Kalhöfer > > _______________________________________________ > 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