[osg-users] osgUtil::IntersectionVisitor eats all the memory

[Trajce Nikolov NICK]

Thanks Robert,

no circular reference since I am displaying that database in the viewer
nicely. Here is the struct (a bit odd but it is as is):

Group
|
PagedLOD PagedLOD PagedLOD .... dozen of these
|
Quadtree (similar to VPB generated subtiles)

I was thinking the visitor is reading all of these by reading all of these
PagedLODs without taking the account the range from the eyepoint. So while
debuging I tried this:

struct MyIntersectionVisitor : public osgUtil::IntersectionVisitor
{
MyIntersectionVisitor(float range)
: IntersectionVisitor()
, _range(range)
{
}

virtual void apply(osg::PagedLOD& plod)
{
if (getDistanceFromEyePoint(plod.getCenter(), true) < _range)
{
osgUtil::IntersectionVisitor::apply(plod);
}
}

protected:
float _range;
};

but no luck. Is there a way to  flush all the pending and loaded nodes from
the DatabasePager?

On Tue, Jan 9, 2018 at 1:23 PM, Robert Osfield <robert.osfield at gmail.com>
wrote:

> Hi Nick,
>
> This is really something you'd want to use a debug for - just run it
> and break the app before anything untoward happens.
>
> The code itself looks quite benign on a first reading, the only thing
> I can think of that might cause a memory issue would be if your scene
> graph had a circular reference in it so the traversal ends up in an
> infinite loop.
>
> Robert
>
> On 9 January 2018 at 12:12, Trajce Nikolov NICK
> <trajce.nikolov.nick at gmail.com> wrote:
> > hi Robert, Community,
> >
> > I have the following code in a loop against very large quadtree based
> > database. And this code is eating all the memory, progressively and then
> the
> > system kills it . Any clue?
> >
> > Thanks a lot
> >
> > osg::ref_ptr<osgUtil::LineSegmentIntersector> picker;
> > osg::ref_ptr<osgUtil::IntersectionVisitor> iv;
> >
> > osg::Vec3d getHOT(const osg::Vec3d& position, osgViewer::CompositeViewer&
> > viewer, osg::Vec3& normal, bool& valid)
> > {
> >     osg::Vec3d result;
> >
> > osg::EllipsoidModel em;
> > osg::Vec3d up = em.computeLocalUpVector(position.x(), position.y(),
> > position.z());
> > up.normalize();
> >
> > osg::Vec3d s = position + up * 100;
> >     osg::Vec3d e = osg::Vec3d(0, 0, 0);
> >
> >     if (viewer.getView(0)->getSceneData())
> >     {
> > #if 1
> > if (!picker.valid())
> > {
> > picker = new osgUtil::LineSegmentIntersector(s,e);
> > iv = new  MyIntersectionVisitor(RANGE);
> > }
> > picker->setStart(s);
> > picker->setEnd(e);
> > picker->getIntersections().clear();
> > iv->setIntersector(picker);
> > iv->reset();
> > iv->setUseKdTreeWhenAvailable(false);
> > //iv->setLODSelectionMode(osgUtil::IntersectionVisitor::
> USE_EYE_POINT_FOR_LOD_LEVEL_SELECTION);
> > viewer.getView(0)->getSceneData()->accept(*iv);
> >
> > if (picker->containsIntersections())
> > {
> > osgUtil::LineSegmentIntersector::Intersections           hitList =
> > picker->getIntersections();
> > osgUtil::LineSegmentIntersector::Intersections::iterator hit =
> > hitList.begin();
> >
> > result = hit->getWorldIntersectPoint();
> > normal = hit->getWorldIntersectNormal();
> > valid = true;
> >
> > return result;
> > }
> > #endif
> >     }
> > valid = false;
> >
> >     return result;
> > }
> >
> > --
> > trajce nikolov nick
> >
> > _______________________________________________
> > osg-users mailing list
> > osg-users at lists.openscenegraph.org
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-
> openscenegraph.org
> >
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>



-- 
trajce nikolov nick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20180109/d52da903/attachment.html>