Jeremy I am not sure exactly how to do this in OSG now, but I did something like this 4-5 years ago in OSG 0.9x. I used the ARB_occlusion_query extention http://oss.sgi.com/projects/ogl-sample/registry/ARB/occlusion_query.txt. I placed nodes in different renderbins added cull and draw callbacks and queried the number of pixels rendered using the extention. You have the render the scene in the proper order or else you could query the number of pixels rendered only to have some of them being overdrawn later on. Back then OSG did not have methods to perform the occlusion query. It does now, but I don't know if it will let you get the number of pixels drawn.
Hope this helps, if you need any more information feel free to ask. Judd On Tue, Jun 30, 2009 at 7:35 PM, Jeremy Warren <[email protected]> wrote: > I have a simple scene. Colored background and an object, say a box. I want > to figure out how many pixels the box is taking up in the scene. It seems > like a simple request, but haven't come up with any solution. Any takers? > > Thanks in advance > --Jeremy > > ------------------------------ > Windows Live™: Keep your life in sync. Check it > out.<http://windowslive.com/explore?ocid=TXT_TAGLM_WL_BR_life_in_synch_062009> > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > >
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