[osg-users] PolytopeIntersector returns no hits when zoomed in (3.6.5)

[OpenSceneGraph Users]

To answer my own question. The approach that worked was to just remove the 
"zNear" plane from the Polytope. It is the last plane.
Seems like an unnecessary hack.

    PolytopeIntersector* picker
      = new PolytopeIntersector ( osgUtil::Intersector::PROJECTION, nx1, 
ny1, nx2, ny2 );
    auto planeList = picker->getPolytope().getPlaneList();
    planeList.pop_back();
    picker->getPolytope().set ( planeList );




On Friday, May 1, 2020 at 12:06:26 PM UTC-7, AndrewC wrote:
>
> Hi,
> I am using the PolytopeIntersector to select objects in a "selection box"
> Works as expected in most cases.
> However when I am "zoomed in" (perspective view) fairly tightly ( the eye 
> point is inside the bounding box of the geometry), the PolytopeIntersector 
> returns "no hits" on the geometry.
>
> I am at my wits end on this one after walking through the OSG code, it 
> seems to be deciding the geometry is not inside the planes of the Polytope.
>
>
> Andrew
>
>
>
>

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