Hi Robert,
I attached the stack trace for the modified osgPick example.
We analyzed the LineSegmentIntersector::intersect code (see below) and we saw
that if we build KDTree AND the transofmation matrix has negative scale then
"geometry->getVertexArray()" returns an empty array and "settings._vertices"
becomes empty.
In debug an assert stops the execution (see stack trace), in release the
execution continue but the geometry is not shown
Code:
void LineSegmentIntersector::intersect(osgUtil::IntersectionVisitor& iv,
osg::Drawable* drawable,
const osg::Vec3d& s, const osg::Vec3d& e)
{
if (reachedLimit()) return;
LineSegmentIntersectorUtils::Settings settings;
settings._lineSegIntersector = this;
settings._iv = &iv;
settings._drawable = drawable;
settings._limitOneIntersection = (_intersectionLimit ==
LIMIT_ONE_PER_DRAWABLE || _intersectionLimit == LIMIT_ONE);
osg::Geometry* geometry = drawable->asGeometry();
if (geometry)
{
settings._vertices =
dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray());
}
Cheers,
Ale
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=74635#74635
Attachments:
http://forum.openscenegraph.org//files/stacktrace_370.txt
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