[Paraview] Surface streamlines are slow
Hi group, I tried creating some surface streamlines as described in the wiki. Process seemed to work but was extremly slow for me so I could not wait it. I have large CFD models imported as ensight (~ 20 Million cells). Paraview run for about five hours without an result for surface streamlines from 50 seed points. I don't really know if this is normal? Regards BastiL ___ 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
Re: [Paraview] Surface streamlines are slow
Hi Bastil, I am not able to help, but would you post the wiki link? Thanks! Fabian bastil2...@yahoo.de wrote: Hi group, I tried creating some surface streamlines as described in the wiki. Process seemed to work but was extremly slow for me so I could not wait it. I have large CFD models imported as ensight (~ 20 Million cells). Paraview run for about five hours without an result for surface streamlines from 50 seed points. I don't really know if this is normal? Regards BastiL ___ 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
Re: [Paraview] Surface streamlines are slow
Fabian, all: http://paraview.org/Wiki/Custom_Filters I would be very happy about some feedback. Regards BastiL Fabian Braennstroem schrieb: Hi Bastil, I am not able to help, but would you post the wiki link? Thanks! Fabian bastil2...@yahoo.de wrote: Hi group, I tried creating some surface streamlines as described in the wiki. Process seemed to work but was extremly slow for me so I could not wait it. I have large CFD models imported as ensight (~ 20 Million cells). Paraview run for about five hours without an result for surface streamlines from 50 seed points. I don't really know if this is normal? Regards BastiL ___ 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
Re: [Paraview] Surface streamlines are slow
Bastil I cannot comment on the surface streamlines directly, as I'm not familiar with the class that is used...but if it internally makes use of the vtkStreamTracer filter code, then I can make the following observation. The vtkStreamTracer class uses vtkDataSet FindCell to locate the start point of a given streamline. It then builds links (vtkUnstructuredGrid only) between cells so that as a streamline passes out of one cell and onto the next, the neighbour can be located quickly. The findCell is very slow as for an unstructuredgrid, it is a brute force search of all cells. The build links is also very slow and if your grid is a single 20million cell dataset, it will take ages. About a year ago, I posted a request to this list for volunteers, to test some improvements that I'd made to the StreamTracer code to a) make use of a cell locator instead of FindCell/BuildLinks to accelerate the streamline searches. b) Clean up some caching to prevent certain operations taking place on every iteration of the inner integration loop within the streamline calculation. I got no volunteers, so I never committed my code. Since then I had problems with maintenance of my tree and reverted all my changes (I was only interested in my TemporalStreamTracer code anyway), but a few weeks ago, I decided to re-tweak the streamline filter to see if my new CachingInterpolatedVelocityField would work with it. I found that my own streamline generation was greatly improved (20million cells approx in my case also). The changes are in the pv-meshless tree (use google), but I will not offer further assistance as I'm very busy this week. So if you want to try it out, you are welcome - and if you can post results to this list, then so much the better - and it may prompt me into a second round of fixes. (the changes I made a few weeks ago were not thorough and I need to spend a little more time on it before it's ready to be committed). JB Hi group, I tried creating some surface streamlines as described in the wiki. Process seemed to work but was extremly slow for me so I could not wait it. I have large CFD models imported as ensight (~ 20 Million cells). Paraview run for about five hours without an result for surface streamlines from 50 seed points. I don't really know if this is normal? Regards BastiL ___ 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 -- John Biddiscombe,email:biddisco @ cscs.ch http://www.cscs.ch/ CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07 Via Cantonale, 6928 Manno, Switzerland | Fax: +41 (91) 610.82.82 ___ 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
