Hi Andy, On Tue, Apr 26, 2016 at 10:15 AM, Andy Smith <[email protected]> wrote: > I have two questions: > > 1. I am trying to load colormaps in a Python script so that I have access to > the lookup table later in the script. I have successfully used the > LoadLookupTable function with xml colormap files but this does not seem to > work on json files. I get a parsing error: > > ERROR: parsing lut file /path/to/my/colormap.json > > The json colormap file loads correctly inside the GUI. Is there another > function that I should be calling instead of LoadLookupTable or is there an > issue with this function? Should it call a different parser based on the > file extension?
LoadLookupTable works only for XML files. I don't believe there is a similar compact function for loading JSON files, but one should be available. > 2. Is there a way to export the discretized color data? For example, my > colormap may have seven control points in Lab space but I'd like to export > 256 control points and the associated R,G,B values for use in other tools. > Alternatively, are there any ParaView Python functions that I can use to > extract R,G,B values from a colormap based on input array values? This Python is surprisingly slow, but works: lut = GetColorTransferFunction(arrayName) dct = lut.SMProxy.GetClientSideObject() range = dct.GetRange() for i in xrange(256): x = (i*(range[1] - range[0]) / 255.0) + range[0] r = dct.GetRedValue(x) g = dct.GetGreenValue(x) b = dct.GetBlueValue(x) print x, r, g, b HTH, Cory > > Thanks, > Andy > > _______________________________________________ > 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
