Hi nick
okay you're casting ray in world coordinates on model in world coordinates...
I haven't understood....
Then You should not consider the CoordinateFrames as matrix are the same.
After a look at osgViewer::View::comuteIntersections i noticed
intersecrionvisitor is created by this line
Code:
osg::ref_ptr< osgUtil::LineSegmentIntersector > picker = new
osgUtil::LineSegmentIntersector(osgUtil::Intersector::MODEL, startVertex,
endVertex);
Perhaps your problem came from here...
cheers
Trajce Nikolov NICK wrote:
> Thanks Julien for your time to give it a look
>
> I went further, debugging view->computeIntersections(). The osgpick is my
> starting point and my code is only a mimic of what
> osgViewer::View::computeIntersection is doing, using the IntersectionVisitor
>
>
> A good sample for reproduction is to have some code (I will post it here
> soon) that will load two models (terrain and building - can be the lz.osg and
> the cow.osg from the dataset) place the model somewhere on the terrain and
> rotate the root (the terrain) a bit, and use the osgpick sample. This is fast
> that come to me minds now, although it might not work the same since picking
> from the screen coords and picking in "world space" have different
> CoordinateFrames for the LineSegmentIntersector used that is managed
> differently
>
>
> On Sat, Feb 18, 2017 at 9:33 PM, Julien Valentin < ()> wrote:
>
> > Hi nick
> > At first glance, I don't see any problem with your code...
> > If you just want to code a mousepicker
> > osgViewer::View::computeIntersections(screenx,screeny,outintersections))
> > would fit your needs.
> >
> > Code:
> > // class to handle events with a pick
> > class PickHandler : public osgGA::GUIEventHandler
> > {
> > public:
> > bool PickHandler::handle(const osgGA::GUIEventAdapter&
> > ea,osgGA::GUIActionAdapter& aa)
> > {
> > switch(ea.getEventType())
> > {
> > case(osgGA::GUIEventAdapter::DOUBLECLICK):
> > {
> > osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
> > if (view){
> > osgUtil::LineSegmentIntersector::Intersections inter;
> > if(view->computeIntersections(ea.getX(),ea.gety(),inter){
> > ...blablabla...
> > }
> > }
> > }
> >
> >
> >
> >
> > Perhaps you should try it before debugging deeper
> >
> > Further, I would recommend the polytopeintersector for general purpose
> > picking (it works for points primitives too)
> >
> > Hope it helps
> >
> >
> > Cheers
> >
> >
> >
> > Trajce Nikolov NICK wrote:
> >
> > > It has to do with MatrixTransforms and probably the IntersectionVisitor.
> > > I had my scene rotated a bit and it was buggy. With identity matrix on
> > > top works well ... Trying to debug if I can find something
> > >
> > > On Thu, Feb 16, 2017 at 8:31 PM, Trajce Nikolov NICK < ()> wrote:
> > >
> > >
> > > > Hi Community,
> > > >
> > > > I am experiencing some bad results from various intersection tests. I
> > > > have a database with buildings and for some reason the intersection
> > > > tests are failing to get me the roofs of the buildings ...
> > > >
> > > >
> > > > Here some snippets of my tries:
> > > >
> > > >
> > > > http://pastebin.com/s7aZk8wA (http://pastebin.com/s7aZk8wA)
> > > > (http://pastebin.com/s7aZk8wA (http://pastebin.com/s7aZk8wA))
> > > >
> > > > http://pastebin.com/1s99SGZc (http://pastebin.com/1s99SGZc)
> > > > (http://pastebin.com/1s99SGZc (http://pastebin.com/1s99SGZc))
> > > >
> > > > http://pastebin.com/UtkqPRce (http://pastebin.com/UtkqPRce)
> > > > (http://pastebin.com/UtkqPRce (http://pastebin.com/UtkqPRce))
> > > >
> > > >
> > > >
> > > > What I am missing here?
> > > >
> > > >
> > > > Thanks for every hint as always!
> > > > Cheers!
> > > >
> > > > --
> > > > trajce nikolov nick
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > --
> > > trajce nikolov nick
> > >
> > > ------------------
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> > >
> >
> >
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> > Read this topic online here:
> > http://forum.openscenegraph.org/viewtopic.php?p=70269#70269
> > (http://forum.openscenegraph.org/viewtopic.php?p=70269#70269)
> >
> >
> >
> >
> >
> > _______________________________________________
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> > ()
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> >
>
>
>
>
> --
> trajce nikolov nick
>
> ------------------
> Post generated by Mail2Forum
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