But when i went through the discussion, i found out that only geomety in the leaves have seperate kd-tree and not a single kd-tree for the whole scene. Correct me if i am wrong.
Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~maruti Blog:- http://marutiborker.wordpress.com On Fri, Sep 5, 2008 at 1:10 PM, Alberto Luaces <[EMAIL PROTECTED]> wrote: > Hi, > > it's already done for you. Just use the osg::KdTreeBuilder visitor on the > subgraph you want to be split with kd-trees. > > Alberto > > El Jueves 04 Septiembre 2008ES 19:15:21 maruti borker escribió: > > Thanks for pointing out , i looked into the discussion and i think the > > current setupd with kd-trees wont help me with my idea. Can anyone point > me > > to some tool/project which creates just the kd-tree ( near to optimal ) > > given a 3d scene . Any help would be appreciated. > > > > Thanks > > > > Maruti Borker > > IIIT Hyderabad > > Website:- > > http://students.iiit.ac.in/~maruti<http://students.iiit.ac.in/%7Emaruti> > > Blog:- http://marutiborker.wordpress.com > > > > On Thu, Sep 4, 2008 at 3:00 PM, Robert Osfield > <[EMAIL PROTECTED]>wrote: > > > HI Maruti, > > > > > > Lots was discussed on osg-users about the KdTree implementation in the > > > OSG when I intergrated the functionality, so have a look through the > > > osg-users archives in June and July. The quick answer is that > > > KdTree's hang off Drawables, and when do intersection testing first > > > coarsed grained culling is done by the scene graphs hierachy of > > > bounding spheres/boxes, then finally fine grained testing is done > > > against the KdTree hanging of the drawables. > > > > > > Robert. > > > > > > On Thu, Sep 4, 2008 at 7:27 AM, maruti borker < > [EMAIL PROTECTED]> > > > > > > wrote: > > > > Hello, > > > > I was amazed to see the development OSG has made, > > > > the last version i used it was 2.3.4. Coming to the topic, i wanted > to > > > > know > > > > > > how > > > > > > > a scenegraph was being linked to a kd-tree for finding out > > > > intersections. > > > > > > I > > > > > > > am thinking of an application which needs querying of spatial data, > for > > > > which i thought of using kd-trees , but i also thought of having a > > > > scenegraph for rendering purposes. I looked at a work "Razor: > > > > Multi-resolution ray tracing for dynamic environments" by William > mark > > > > > > and > > > > > > > Warren hunt. They also lazily linked a scene-graoh and a kd-tree. I > > > > > > wanted > > > > > > > to know how the kd-tree is being linked to a scenegraph in OSG and > also > > > > whether i could actually access the kd-tree for performing algorithms > > > > on > > > > > > top > > > > > > > of it. And also an advice whether using this linkage in OSG is useful > > > > for storing spatial data. Do mail back incase of any doubts or > > > > clarifications > > > > > > . > > > > > > > Maruti Borker > > > > IIIT Hyderabad > > > > Website:- > > > > http://students.iiit.ac.in/~maruti<http://students.iiit.ac.in/%7Emaruti> > <http://students.iiit.ac.in/%7Emaruti > > > >> Blog:- http://marutiborker.wordpress.com > > > > > > > > _______________________________________________ > > > > 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 > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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