Hi Ding, Rather than using thousands of PrimitiveSet's try building your geometry with a smaller set of PrimitiveSet, this will result in a much lower CPU overhead when you are rendering without display lists.
Robert. On 25 September 2013 11:03, ding zheng <[email protected]> wrote: > Hello Everyone, > > I am a new osg user using 3.1.3. Recently I am trying to make a dynamic > geometry drawing on win7 using NVIDIA. > > I have one geometry which contains a huge number of primitive sets (for > example 7000) and one vertices around 800,000. All the primitive sets are > defined as range primitive set type. I use BIND_PRIMITIVESET in color > binding. each set corresponds to one element in the colorarray. after > constructing the geometry, the geometry display is ok. If I set using > vertexbufferobject( true), my application is almost blocked. I got very very > low frame rate. If I set using displaylist( true ), the frame rate is much > high than using vertexbufferobject and my application works fine with the > manipulations such zoom(in/out ). > > Now, i got questions. my idea is only to change one element of the > colorarray and hope only updating the primitive set which is linked to the > changed color element. The rests of primitive sets should not be updated. > I hope this process should be fast and simple. But the dirtyldisplaylist > update all colors and redraw all. So before I change the color, I set using > displaylist as false, after changing, I set using display back as true. such > way avoids to call dirtydisplaylist. but the speed almost is same as using > dirtydisplaylist. My geometry data variance is set as Static. > > I read some threads. Is 3.2 can solve this problem? > > Can someone help me? > > Thanks > > ding > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=56429#56429 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
