Hello Michael, The little secret is in vtkKWEVolumeMapper. Check the following message for a longer explanation:
http://public.kitware.com/pipermail/vtkedge/2009-April/000161.html VolView uses the same flavor of VTKEdge as you get from www.vtkedge.org . Regards. On Thu, May 7, 2009 at 9:49 AM, Michael Knopke <[email protected]> wrote: > Hello vtkEdgeTeam, > > > > I’m experimenting with vtkEdge but somehow I’m not able to reproduce the > same speed as can be seen in VolView 3.0. > > I’ve made sure to link against release libs of vtkEdge. The pipeline is > quite similar to the GPUVolumeRendering example. > > If I use identical transfer maps (color/opacity) and shading parameters I > can produce the same output as VolView. However interacting with the volume > is extremely slow. > > I’m aware of SetInteractiveUpdateRate and SetDesiredUpdateRate this will > help with interaction, but then the volume looks like softwarerendering when > interacting (a blurred pixelbox). > > Another annoying behavior is, that once you try to start interacting, it > takes like 1-2seconds before it starts to rotate. This can be seen in > volview too but the lag is significantly smaller. > > The question is, how to achieve the same speed as in volview? I could > understand that you made some changes for this open source beta which are > not present if one buys the renderer (for commercial purposes). > > But we need to make sure that the performance improvement can be achieved. > > > > The test pc is: > > > > Intel Q6600 (quad) > > 4GB Ram > > Geforce 8800GTX > > > > TestVolume: PHENIX Dataset from Osirix Homepage (360slices) > > > > VolView: > > - Fullscreen on 20” (1280x1024): interactive (10-15fps), almost > identical to final rendering, final rendering after about 0.5sec > > > > Our TestPipeline: > > - Fullscreen on 20” (1280x1024): interactive (3-5fps), totally > blurred image, 2-3 seconds to final rendering > > > > I’d be glad to get some hints how to get better results. > > > > Regards, > > > > Michael > > _______________________________________________ > VtkEdge mailing list > [email protected] > http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge > > -- François Bertel, PhD | Kitware Inc. Suite 204 1 (518) 371 3971 x113 | 28 Corporate Drive | Clifton Park NY 12065, USA _______________________________________________ VtkEdge mailing list [email protected] http://public.kitware.com/cgi-bin/mailman/listinfo/vtkedge
