Hi Kaiser,
I have just done parts of what you need.
Make yourself a group node which you place as the root of the scene-graph that
you need to list objects from.
Override it's traverse function and post process the cull-visitor:
void yourGroupClass::traverse( osg::NodeVisitor& nv )
{
osg::Group::traverse( nv );
if( nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR )
{
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>( &nv );
if( cv )
{
// Do your stuff here
// You should be able to find what you need inside
cv->RenderStage->RenderBinList...
// The cull-traverse is done, so everything that is visible must be
stored in the render-bins.
// I am pretty sure you should be able to find some information in
these structures which points you to your objects.
}
}
}Cheers,
Viggo
Date: Tue, 29 Jul 2008 09:56:59 +0200From: [EMAIL PROTECTED]: [EMAIL
PROTECTED]: [osg-users] View Frustrum Culling
Hello everyone,
Maybe it sounds basic. I have camera that will never change place. I have a
database with one Object/onFile-Mapping. So next time I load my Scene id like
to load only relevant Objects to shorten Loading time.
Simple Task: I need to get a list of all VISIBLE Objects in the ViewFrustrum.
Can this be done with the cull-Traverser. The docs say it collects all the
objects in a special order. Are these objects all objects in the end or only
the visible? How can I get the visbile Nodes? What things are to be taken care
of?
Greetings?
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