FGFS-4.1/OpenSceneGraph
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Improved the handling of CameraNode and viewers with projection matrices

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contained NaN's.
This commit is contained in:
Robert Osfield
2005-11-07 16:48:45 +00:00
parent 18c916de1a
commit 5e40ca9c86
1 changed files with 41 additions and 37 deletions
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78
src/osgProducer/Viewer.cpp
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@@ -71,9 +71,11 @@ public:
PickVisitor()
{
xp=yp=0;
setTraversalMode(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN);
setTraversalMode(osg::NodeVisitor::TRAVERSE_ACTIVE_CHILDREN);
}
~PickVisitor()
{
}
~PickVisitor() {}
void setTraversalMask(osg::Node::NodeMask traversalMask)
{
@@ -82,22 +84,24 @@ public:
}
// Aug 2003 added to pass the nodemaskOverride to the PickIntersectVisitor
// may be used make the visitor override the nodemask to visit invisible actions
inline void setNodeMaskOverride(osg::Node::NodeMask mask) {
_piv.setNodeMaskOverride(mask);
_nodeMaskOverride = mask; }
void handleProjectionMatrix(const osg::Matrixd& matrix, osg::Group& node)
// may be used make the visitor override the nodemask to visit invisible actions
inline void setNodeMaskOverride(osg::Node::NodeMask mask)
{
_piv.setNodeMaskOverride(mask);
_nodeMaskOverride = mask;
}
virtual void apply(osg::Projection& pr)
{
osg::Matrixd mt;
mt.invert(matrix);
mt.invert(pr.getMatrix());
osg::Vec3 npt=osg::Vec3(xp,yp,-1.0f) * mt, farpt=osg::Vec3(xp,yp,1.0f) * mt;
// traversing the nodes children, using the projection direction
for (unsigned int i=0; i<node.getNumChildren(); i++)
for (unsigned int i=0; i<pr.getNumChildren(); i++)
{
osg::Node *nodech=node.getChild(i);
osg::Node *nodech=pr.getChild(i);
osgUtil::IntersectVisitor::HitList &hli=_piv.getIntersections(nodech,npt, farpt);
for(osgUtil::IntersectVisitor::HitList::iterator hitr=hli.begin();
hitr!=hli.end();
@@ -110,34 +114,34 @@ public:
}
}
virtual void apply(osg::Projection& pr)
{
handleProjectionMatrix(pr.getMatrix(), pr);
}
virtual void apply(osg::CameraNode& camera)
{
// just handling the projection matrix here, this leaves the question about non identity view matrices....
// we need to think about the effects of this. Robert Osfield, Novemenber 2005.
handleProjectionMatrix(camera.getProjectionMatrix(), camera);
}
// partial fix for CameraNode... current code
// assumes CameraNode has an absolute projection matrix, rather than an acculated one,
// will need to think about how to handle relative project matrices. RO November 2005.
osgUtil::IntersectVisitor::HitList& getHits(osg::Node *node, const osg::Vec3& near_point, const osg::Vec3& far_point)
{
// High level get intersection with sceneview using a ray from x,y on the screen
// sets xp,yp as pixels scaled to a mapping of (-1,1, -1,1); needed for Projection from x,y pixels
osg::Matrixd mt;
mt.invert(camera.getProjectionMatrix());
osg::Vec3 npt=osg::Vec3(xp,yp,-1.0f) * mt, farpt=osg::Vec3(xp,yp,1.0f) * mt;
// first get the standard hits in un-projected nodes
_PIVsegHitList=_piv.getIntersections(node,near_point,far_point); // fill hitlist
osgUtil::IntersectVisitor::HitList &hli=_piv.getIntersections(&camera,npt, farpt);
for(osgUtil::IntersectVisitor::HitList::iterator hitr=hli.begin();
hitr!=hli.end();
++hitr)
{
// add the projection hits to the scene hits.
// This is why _lineSegment is retained as a member of PickIntersectVisitor
_PIVsegHitList.push_back(*hitr);
}
// then get hits in projection nodes
traverse(*node); // check for projection nodes
return _PIVsegHitList;
}
osgUtil::IntersectVisitor::HitList& getHits(osg::Node *node, const osg::Matrixd &projm, const float x, const float y)
{
setxy(x,y);
_PIVsegHitList.clear();
// utility for non=sceneview viewers
// x,y are values returned by
osg::Matrixd inverseMVPW;
@@ -145,14 +149,14 @@ public:
osg::Vec3 near_point = osg::Vec3(x,y,-1.0f)*inverseMVPW;
osg::Vec3 far_point = osg::Vec3(x,y,1.0f)*inverseMVPW;
if (!near_point.valid() || !far_point.valid())
if (near_point.valid() && far_point.valid())
{
osg::notify(osg::INFO)<<"Warning: PickVisitor caught invalid nea/far poiints."<<std::endl;
return _PIVsegHitList;
_PIVsegHitList = _piv.getIntersections(node,near_point,far_point); // fill hitlist
}
setxy(x,y);
getHits(node,near_point,far_point);
// traverse for any projection/camera nodes.
node->accept(*this);
return _PIVsegHitList;
}