<div dir="ltr">Hi All,<br><br>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.<div><br>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)<br></div><div><br>The blog post here<br><a href="http://www.kitware.com/blog/home/post/976">http://www.kitware.com/blog/home/post/976</a><br>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 ?<br><br>Thanks, <br><br>Simon</div><div><br></div><div>PS : The polygonal rendering seems a lot faster with the new backend !<br><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>------------------------------------------------------------------<br>Simon Esneault<div>Rennes, France<br>------------------------------------------------------------------</div></div></div></div>
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