Also, Do you have shading enabled? We fixed a bug with shading that was causing the slow performance a while back. I don't remember if that was included in 4.4 or not ( I can check ).
- Aashish On Mon, Oct 26, 2015 at 1:53 PM, Aashish Chaudhary < [email protected]> wrote: > Simon, > > What kind of dataset you are using? Depending on the data type you might > be using > the GPU one or the unstructured renderer. The performance we measured is > related to the GPU ray cast mapper > and will apply only to the vtkImageData inputs. > > Also, helpful would be is if you can tell if the new mapper is bringing > low resolution when you interact with the volume (and whether or not it > happens with old mapper). > > Thanks, > > > On Mon, Oct 26, 2015 at 1:47 PM, Simon ESNEAULT <[email protected]> > wrote: > >> Hi All, >> >> We are trying to make the switch to the new OpenGL2 backend for our >> application, and although the switch was easy (thanks for not breaking the >> API ;) ), we can see a significant slowdown on the GPU volume rendering >> part, especially during interaction. Typically we dropped from 15/20 fps to >> 7/8 fps, on the same machine (Win32, Nvidia Quadro K420), with the same >> code around. >> >> This slow down can be seen in ParaView, if you compare the latest 4.4 >> OpenGL2 build with the classic 4.4 build while volume rendering a big >> enough volume (512^3) >> >> The blog post here >> http://www.kitware.com/blog/home/post/976 >> claims that the new GPU volume rendering implementation should be faster >> than the old one, is there some more detailed explanation somewhere ? Are >> there some important parameters that can make the difference ? >> >> Thanks, >> >> Simon >> >> PS : The polygonal rendering seems a lot faster with the new backend ! >> >> -- >> ------------------------------------------------------------------ >> Simon Esneault >> Rennes, France >> ------------------------------------------------------------------ >> >> _______________________________________________ >> Powered by www.kitware.com >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Search the list archives at: http://markmail.org/search/?q=vtk-developers >> >> Follow this link to subscribe/unsubscribe: >> http://public.kitware.com/mailman/listinfo/vtk-developers >> >> >> > > > -- > > > > *| Aashish Chaudhary | Technical Leader | Kitware Inc. * > *| http://www.kitware.com/company/team/chaudhary.html > <http://www.kitware.com/company/team/chaudhary.html>* > -- *| Aashish Chaudhary | Technical Leader | Kitware Inc. * *| http://www.kitware.com/company/team/chaudhary.html <http://www.kitware.com/company/team/chaudhary.html>*
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