The osgSim::HeightAboveTerrain class automatically handles paged databases so use this rather than the lower level intersections classes in osgUtil.
On Nov 10, 2007 2:54 AM, Mark Hurry <[EMAIL PROTECTED]> wrote: > > > > > Hi, > > > > I'm trying to position 30 - 40 models on a large terrapage (.txp) terrain > database, approximately 300miles x 500miles. > > > > All the models are scattered around the terrain. The terrain is obviously > not present all at one go for me to get all the HAT values I need. > > > > What I have done is move to each model position and wait for the HAT test to > return a valid result. However my problem is that I think I am probably > picking up a low level LOD intersection, so that when I eventually go and > view the positioned model it can sometimes float above, sink below, or sit > on the terrain. > > > > > > The following is the a snippet of code that I am using > > isectVisitor.addLineSegment ( pTerrainIsect ); > > > > pTerrainNode->accept ( isectVisitor ); > > > > osgUtil::IntersectVisitor::HitList hitList = isectVisitor.getHitList( > pTerrainIsect ) ; > > > > > > Is there someway of making sure that I pick up the highest LOD intersection, > or someway of finding out if the highest LOD has been loaded before I do my > intersection test? > > > > Also when the terrain is loaded from .txp into the scenegraph, is it > positioned in the graph lowest LOD first, highest last, or is there no > particular order? > > > > Any help would be much appreciated. > > > > > > Cheers > > > > Mark > > > > > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.503 / Virus Database: 269.15.26/1120 - Release Date: 09-Nov-07 > 9:26 AM > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
