[osg-users] osgUtil::IntersectionVisitor slow with huge geometry

[Gianni Ambrosio]

Just an update.
OSG KdTree works great!

Computational time for "camera->accept(intersectionVisitor)":
before it was about 10M microseconds
with KdTree it is about 25 microseconds!

This is the code I modified in my example:

Code:

osg::Node* createScene() {
	osg::Geode* geode = new osg::Geode;
   osg::KdTree* kdtree = new osg::KdTree;
   osg::Geometry* geometry = buildGeometry();
   osg::KdTree::BuildOptions buildOptions;
   kdtree->build(buildOptions, geometry);
   geometry->setShape(kdtree);
	geode->addDrawable(geometry);
	return geode;
}




Gianni

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http://forum.openscenegraph.org/viewtopic.php?p=71284#71284