I think your best bet is to provide u and v at the reader as a attribute array.
I could be wrong (I'm not a topology or meshing expert) but I don't think it is possible to in general provide a u,v mapping for arbitrary shapes. If it is possible, it would be great to have the algorithm coded up as a filter in VTK. David E DeMarle Kitware, Inc. R&D Engineer 28 Corporate Drive Clifton Park, NY 12065-8662 Phone: 518-371-3971 x109 On Mon, Nov 9, 2009 at 10:31 AM, Berk Geveci <[email protected]> wrote: > Ah, I understand. There is no general solution to this problem in > VTK/ParaView. Texture coordinates is probably closest. You can look at > Texture map to ... filters. Essentially, you need to write a filter > that computes the parametric coordinates for the kind of surface you > are interested it. > > -berk > > On Mon, Nov 9, 2009 at 10:27 AM, Fred Fred <[email protected]> wrote: >> I mean I would like for instance to have my surface colored by a function of >> u, u being the value of the parametric coordinate, given an origin on the >> surface. >> BTW using parametric coordinates in a filter would require having these >> parametric coordinates available, which, for an arbitrary surface, would >> involve computing it, so this is the same problem: how to compute those >> parametric coordinates? >> >>> Date: Mon, 9 Nov 2009 09:04:53 -0500 >>> Subject: Re: [Paraview] Switching to parametric coordinates >>> From: [email protected] >>> To: [email protected] >>> CC: [email protected] >>> >>> I am not sure I understand what you mean. You want to use parametric >>> coordinates inside a filter? >>> >>> On Sun, Nov 8, 2009 at 1:37 PM, Fred Fred <[email protected]> wrote: >>> > I wonder if it is possible to switch to parametric coordinates, either >>> > on a >>> > curve or on a surface, given an arbitrary origin and arbitrary u or >>> > (u,v) >>> > unit vectors? >>> > >>> > >>> > ________________________________ >>> > Nouveau! Découvrez le Windows phone Samsung Omnia II disponible chez >>> > SFR. >>> > Cliquez ici >>> > _______________________________________________ >>> > 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 >>> > >>> > >> >> ________________________________ >> Nouveau! Découvrez le Windows phone Samsung Omnia II disponible chez SFR. >> Cliquez ici > _______________________________________________ > 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
