[osg-users] Rendering performance gain on 2 different Systems
Dear OSG Community, I'm developing visualization software, which involves rendering of large point clouds. I optimized the scene graph in order to get better frame rates. In particular I now use osg::Geometry instead of osg::ShapeDrawable. I tested it on 2 different machines and got different performance gains. System 1 (Notebook): Intel Pentium-M, 1.86GHz, 1GB RAM, Intel GMA900 Chipset, Windows XP System 2 (Desktop PC): Intel Core 2 DuoE8400, 3 GHz, 2GB RAM, GeForce 9500 GT, Windows XP On System 1 the rendering is about 40% faster with the optimizations. And on System 2 I got a 7x higher framerate ! Now, my question is: what can be the reasons for that dramatically differnet performance gain? I suppose, it is because of the different OpenGL implementations and graphics hardware, but I don't have a clue whats really going on here ... Who can give me some comprehensible explanations? Thank you! Cheers, Felix -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=33610#33610 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Visualizing 3D-Points including standard deviation
Thank you for the suggestions, I think a billboard with a gaussian texture is right what I need. Either a view-aligned billboard, which requires to update the width/height of the billboard - or a static billboard with 2 (or 3) crossing quads. A source code example would be great! Could you ask your colleagues, please? :) Thanks again, Felix -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30937#30937 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Visualizing 3D-Points including standard deviation
Hi, I need to visualize points in 3D, whose positions are Gauss distributed. The expected values and the standard deviations for each x, y and z coordinate are given. So, how can I do that with OSG? I could draw a sphere (using osg::SphereDrawable) with a fixed radius at the center and another transparent sphere around it for visualizing the standard deviation. But that doesn't look nice... What I'm looking for is some kind of 3D-radial gradient. The transparency should increase along the gradient accourding to the Gaussian distribution function. Note, that the standard deviation can be different for each dimension. I'm a newbie in OSG and not an OpenGL expert. Some example code would be really helpful. Thank you Sincerely, Felix -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30872#30872 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
