FGFS-4.1/OpenSceneGraph
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Added further checks for _node validity.

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This commit is contained in:
Robert Osfield
2004-06-11 21:00:06 +00:00
parent c63f0e2fce
commit eda1bf544d
1 changed files with 25 additions and 28 deletions
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53
src/osgGA/TerrainManipulator.cpp
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@@ -306,38 +306,35 @@ void TerrainManipulator::computePosition(const osg::Vec3d& eye,const osg::Vec3d&
// compute rotation matrix
osg::Vec3 lv(center-eye);
_distance = lv.length();
// compute the itersection with the scene.
osgUtil::IntersectVisitor iv;
osg::ref_ptr<osg::LineSegment> segLookVector = new osg::LineSegment;
segLookVector->set(eye,center);
iv.addLineSegment(segLookVector.get());
_node->accept(iv);
bool hitFound = false;
if (iv.hits())
_center = center;
if (_node.valid())
{
osgUtil::IntersectVisitor::HitList& hitList = iv.getHitList(segLookVector.get());
if (!hitList.empty())
{
osg::notify(osg::INFO) << "Hit terrain ok"<< std::endl;
osg::Vec3d ip = hitList.front().getWorldIntersectPoint();
// compute the itersection with the scene.
osgUtil::IntersectVisitor iv;
_center = ip;
_distance = (ip-eye).length();
hitFound = true;
osg::ref_ptr<osg::LineSegment> segLookVector = new osg::LineSegment;
segLookVector->set(eye,center);
iv.addLineSegment(segLookVector.get());
_node->accept(iv);
bool hitFound = false;
if (iv.hits())
{
osgUtil::IntersectVisitor::HitList& hitList = iv.getHitList(segLookVector.get());
if (!hitList.empty())
{
osg::notify(osg::INFO) << "Hit terrain ok"<< std::endl;
osg::Vec3d ip = hitList.front().getWorldIntersectPoint();
_center = ip;
_distance = (ip-eye).length();
hitFound = true;
}
}
}
if (!hitFound)
{
// ??
_center = center;
}
// note LookAt = inv(CF)*inv(RM)*inv(T) which is equivilant to:
// inv(R) = CF*LookAt.