> See the manual for the syntax. Where can I find that? The ParaView User's Guide <www.paraview.org/files/v1.6/ParaViewUsersGuide.PDF> isn't too verbose on any of that. The Wiki, on the other hand, seems to contain a fair amount of examples. Specifically, I've looked at <http://www.paraview.org/Wiki/Python_Programmable_Filter> to see about programmable filters.
Unfortunately, this hasn't gotten me very far, as I'm lacking understanding of the entities used in the examples. Questions I asked myself were: * What do I need to do to fetch my point data: self.GetPolyDataInput()? self.GetInputDataObject(0, 0)? Or simply self.GetInput()? * How do I access point data then? * Do I have to create a new vector and feed this into some sort of output thing? Is there a documentation as to what methods are available for those types? The input file is Exodus, if that makes any difference. If there's a tutorial for this kind of stuff, I'll be happy to go through it; otherwise I'd appreciate your help here. Cheers, Nico On Wed, Jun 8, 2011 at 6:17 PM, David E DeMarle <[email protected]> wrote: > 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 >> > > _______________________________________________ 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
