Also the standard calculator does have conditionals, there just isn't a button corresponding to them on the UI. See the manual for the syntax.
David E DeMarle Kitware, Inc. R&D Engineer 28 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-371-3971 x109 On Wed, Jun 8, 2011 at 12:16 PM, David E DeMarle <[email protected]>wrote: > The python programmable filter (and the easier to use python programmable > calculator variant of that) will get you beyond all of those limitations. > > David E DeMarle > Kitware, Inc. > R&D Engineer > 28 Corporate Drive > Clifton Park, NY 12065-8662 > Phone: 518-371-3971 x109 > > > > On Wed, Jun 8, 2011 at 12:11 PM, Nico Schlömer > <[email protected]>wrote: > >> > If you want to do arbitrary arithmetic, you will have to first >> > generate the array using something like a "Calculator" filter and then >> > color using the generated array. >> >> Oh, if I remember correctly I did look into this before, and found the >> calculator filter too limited on the arithmetics that you could >> perform. Is it still the case that you have a set of like ten >> functions (add, multiply, sine, cosine,...) to mix and match? I need >> to to something like >> >> for x in data_values: >> if x[0] > 0 and x[1] > 0 >> return bla >> elseif ... >> >> -- atan2() that is. >> >> >> > Yes, RGBPoints defines the mapping between scalar and color. It's a >> > list of 4 tuples (scalar, r, g, b), repeated sequentially. >> >> Hm, I'll look into it. Where's the proper spot for documentation of this? >> >> Cheers, >> Nico >> >> >> >> >> >> >> >> On Wed, Jun 8, 2011 at 5:25 PM, Utkarsh Ayachit >> <[email protected]> wrote: >> > Magnitude corresponds to the magnitude of a vector, so yes, it takes >> > the square root. >> > >> > If you want to do arbitrary arithmetic, you will have to first >> > generate the array using something like a "Calculator" filter and then >> > color using the generated array. >> > >> > Yes, RGBPoints defines the mapping between scalar and color. It's a >> > list of 4 tuples (scalar, r, g, b), repeated sequentially. >> > >> > Utkarsh >> > >> > On Wed, Jun 8, 2011 at 11:19 AM, Nico Schlömer < >> [email protected]> wrote: >> >> Thanks for the hints. >> >> >> >> The Trace function in indeed quite useful in that it get you where you >> >> want to be. When looking at the code there's still a lot of me to >> >> understand though, the GetLookupTableForArray() call seems to be >> >> crucial for example. >> >> >> >> * The VectorMode='Magnitude' parameter seems to be responsible for >> >> merging the two components into one scalar, but I'm not quite sure how >> >> this is done: with a sqrt() or without? Is is possible to customize >> >> this? I'd like to have something like ATAN2 there as well. >> >> >> >> * Is the RGBPoints=[0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0, 1.0], >> >> parameter responsible for the colormap? >> >> >> >> Cheers, >> >> Nico >> >> >> >> >> >> >> >> >> >> >> >> On Wed, Jun 8, 2011 at 3:13 PM, Utkarsh Ayachit >> >> <[email protected]> wrote: >> >>> The following wiki page talks about how to color using arrays: >> >>> >> http://www.paraview.org/Wiki/ParaView/Python_Scripting#Representations_and_Views >> >>> >> >>> The easiest way to figure out Python code equivalents is to use the >> >>> Trace functionality to generate python trace files for actions >> >>> performed in the GUI (accessible from Tools menu). You "Start Trace", >> >>> do a set of actions and then "Stop Trace" and you should be able to >> >>> view the resulting Python code. >> >>> >> >>> Utkarsh >> >>> >> >>> >> >>> >> >>> On Wed, Jun 8, 2011 at 9:05 AM, Nico Schlömer < >> [email protected]> wrote: >> >>>> Hi, >> >>>> >> >>>> I'm just taking first steps with ParaView's Python interface and >> >>>> figured out so far that >> >>>> >> >>>> ================ *snip* ================ >> >>>> exodusReader = ExodusIIReader( FileName="solution.e" ) >> >>>> Show( exodusReader ) >> >>>> Render() >> >>>> ================ *snap* ================ >> >>>> >> >>>> would plot the mesh that is stored in the ExodusII file solution.e, >> >>>> and that can play around with GetActiveView() to adjust camera angles >> >>>> and such. >> >>>> >> >>>> What I haven't found out though is how to plot actual point data. I >> get >> >>>> >> >>>> >> >>>>>>> exodusReader.PointData[:] >> >>>> [Array: GlobalNodeId, Array: PedigreeNodeId, Array: A, Array: psi, >> >>>> Array: thickness] >> >>>> >> >>>> and l'm looking at the 2-component array "psi". For example, I'd like >> >>>> to do something like >> >>>> >> >>>> res = sqrt( component1**2 + component2**2 ) >> >>>> >> >>>> and have res[:] rendered on the mesh with a certain color map. >> >>>> >> >>>> Any hints? >> >>>> >> >>>> Cheers, >> >>>> Nico >> >>>> _______________________________________________ >> >>>> 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://www.paraview.org/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 >> >> Follow this link to subscribe/unsubscribe: >> http://www.paraview.org/mailman/listinfo/paraview >> > >
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