Hi Anthony,
I'm afraid I've never tried to combine TerraPage databases with the
osg::Sim lntersection classes, so can't point you in any particular
direction. In theory the .txp plugin creates PagedLOD's and then
leverages the osgDB::DatabasePager for paging, so should be mappable
across to how the osgSim intersections classes read tiles in, but
clearly there must be something amiss as to what it might be I can't
say. You'll need to step through the .txp plugin with a debug to see
what the difference are between when it's paged by the normal viewer
vs the osgSim intersection classes.
Robert.
On Mon, Dec 22, 2008 at 10:34 PM, I-Nixon, Anthony D
<anthony.d.ni...@boeing.com> wrote:
> Hello everyone:
>
> I'm trying to compute LOS on a scene graph that is not being displayed
> (this is for "offline" analysis).
>
> Code looks a bit like this:
>
>
> osgDB::FilePathList
> filePath(osgDB::Registry::instance()->getDataFilePathList());
> filePath.push_front(dirContainingTerrain);
> osgDB::Registry::instance()->setDataFilePathList(filePath);
>
> osg::ref_ptr<osg::Node> terrain =
> osgDB::readNodeFile("archive.txp");
>
> osgSim::LineOfSight::Intersections ints =
> osgSim::LineOfSight::computeIntersections(terrain.get(), aPoint,
> theOtherPoint);
>
> The issue is that the TerraPage loader doesn't seem to load in the paged
> LODs. Is there something I need to do to trigger this? The above code
> works fine for ive based Paged terrain (generated using osgdem).
>
> The LineOfSight is functioning as expected if the scene graph is
> displayed in a viewer.
>
> Any pointers would be most appreciated.
>
> This is with OSG 2.6.1
>
> Thanks in advance.
>
> // Anthony Nixon
> // Modelling & Simulation Architect
> // Systems Analysis Laboratory
> // Boeing Defence Australia
>
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>
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