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 ------------------------------------------------------------------
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