HI Andrey, I'm rather confused about what you are trying to do, you question seems rather mixed up. Could you take a step back and explain at a higher level what you are trying to achieve and we can then point you in the right direction of how to achieve.
Robert. On 9 March 2012 08:29, Andrey Ibe <xry...@gmail.com> wrote: > Hi, > > i am trying to get eyePosition and direction, more precisely, the direction > of a ray for the purpose of ray tracing. > > this is what i am doing: > > Code: > const osg::Vec3d collisionPoint = intersection.getWorldIntersectPoint(); > ... > osg::Vec3d eyeDirection = collisionPoint - _tracer->getEye(); > eyeDirection.normalize(); > > > where the _tracer->getEye() method returns the position of the eye (computed > once for a frame): > Code: > > if (!_eye_set) { > osg::Vec3d center, up; > getCamera()->getViewMatrixAsLookAt(_eye, center, up); > _eye_set = true; > } > > > i am not sure whether this is the correct way to get the eye > position/direction. i was thinking there has to be a way to get the direction > from an intersection itself, but i am not confident using the start/end > points (transforming them into appropriate coordinates) considering i create > the rays (line segment intersectors) in WINDOW and also MODEL coordinate > frames. > > can anyone tell me whether my method is correct or i should rather try > getting the start/end points from the intersector, transforming them and this > way getting the ray (==eye) direction ? > > Thank you! > > Cheers, > Andrey[/code] > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=46123#46123 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org