Hi,
I would like to create a pre-display texture that is base on an iterative pre
rendering process
prerender:
while(texture not ready)
draw a pixel shaded textured quad
}
render:
draw the textured quad
For this i use FBO RTT Camera and an overrided myGeometry : public
osg::Geometry that perform occlusion queries on normal osg::Geometrys;
Code:
class myGeometry: public osg::Geometry{
//component geoms
osg::Geometry _component[NBComponents];
drawimplementation(){
while not okay{
//perform an occlusion query for each component geoms
// update convergence flag based on OccQResults
okay=update(okay,occlusionsqueriesresults)
}
}
}
}
I've chosen to override osg::Geometry in order component shares statesate
It work well for one compoenent but i have a steange issue both under linux and
windows:
->Debugging fbo with glsldevil shows me a correct execution of the process but
when i launch it outside the display seems to get stuck
unless i cout some stuff during display and switch alt-TAB between commandline
and osgviewer windows:
It's seems that curiously queries results are made up to date only with this
hack...
I havent test it in pure gl/glut so :
Could it be a problem in osgviewer
Thank you!
Cheers,
Julien
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=28610#28610
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