HI Suraji, How you want to go about this will depend upon how you are managing the scene graph. Are there just specific nodes that you want to track or all nodes in the scene graph?
I wouldn't recommend using cull callbacks as this can only tell you whether a node has been culled or not for the current cull traversal, it doesn't allow you to detect where it is relative to the view frustum and doesn't allow you to modify the cull traversal. My expectation is that you'll need to have a custom traversal of the scene graph that uses a Polytope to represent the view frustum and have this detect what nodes might be crossing the sides of the Polytope, then adjust the Cameara's view matrix accordingly. The osgUtil::PolytopeIntersector might be relevant but more as a guide than for direct use as it only tells you what's inside the Polytope not what might be crossing one of it's planes. Robert. On 26 August 2016 at 10:06, Suraj Paul <su...@isac.gov.in> wrote: > Hi evrybody, > > I am new to Openscene graph and need a help/guidance. > > I wish to [b]find which of the sides of view frustum[/b]- left, right, top, > bottom near or far- a moving node is crossing. How to find this in Openscene > graph? > > I need it so that, i can translate the camera in the approriate direction (by > some amount) to contain the moving node within the camera frustum volume... > > Any help would help me... > > > ... > > Thank you! > > Cheers, > Suraj > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=68450#68450 > > > > > > _______________________________________________ > 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
