Hmm. I believe that it uses the timesteps that are in the file and interpolate in between for RK (2nd order I think) integration. This should be no different than linearly interpolating between timesteps accuracy-wise. Do you have an example dataset that I can play with? The particle tracker's interface is a bit finicky and we have plans to fix it.
-berk 2011/6/23 Takuya OSHIMA <osh...@eng.niigata-u.ac.jp>: > Really? Particle tracer never works for me without temporal > interpolator (I only get a polygonal mesh with 0 cells/points). How do > you make the interpolation work and how do you specify the timestep > interval? > > Takuya > > Takuya OSHIMA, Ph.D. > Faculty of Engineering, Niigata University > 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN > > From: Berk Geveci <berk.gev...@kitware.com> > Subject: Re: [Paraview] OpenFOAM reader incompatibility with temporal > intermpolator > Date: Thu, 23 Jun 2011 09:24:44 -0400 > >> Hi Takuya, >> >> Out of curiosity, why would the lack of temporal interpolator make >> path lines impractical? The particle tracer does its own interpolation >> between timesteps. >> >> -berk >> >> On Thu, Jun 23, 2011 at 5:42 AM, Takuya OSHIMA >> <osh...@eng.niigata-u.ac.jp> wrote: >> > Hi, >> > >> > I just came across Dave DeMarle's ParaView course slides presented >> > at the 6th OpenFOAM Workshop. >> > http://www.openfoamworkshop.org/6th_OpenFOAM_Workshop_2011/Program/Training/deMarle_slides.pdf >> > >> > In the 11th slide (Temporal Processing) I see that the "Interpolation >> > between time steps" is grayed out, which I suspect was done so because >> > the temporal interpolator did not interpolate the OpenFOAM dataset >> > (which made path lines unpractical as well). This is a known >> > problem that has fixes involving both the OpenFOAM reader and the >> > temporal interpolator. The fix to the former (which I backported from >> > my own development version) is attached in this mail and the latter >> > has already been filed as a bug with a patch: >> > http://vtk.org/Bug/view.php?id=12151 >> > >> > Thanks, >> > Takuya >> > >> > Takuya OSHIMA, Ph.D. >> > Faculty of Engineering, Niigata University >> > 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN >> > >> > _______________________________________________ >> > 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