Farshid, Thank you for your help...:)
-Shayne -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Farshid Lashkari Sent: Tuesday, September 11, 2012 11:28 AM To: OpenSceneGraph Users Subject: Re: [osg-users] LineSegmentIntersector question... Hi Shayne, Yes, the default is NO_LIMIT. I'm using it in version 2.9.12, but I think I might have backported it from a newer version. Sounds like you'll need to do an upgrade to get this feature. Cheers, Farshid On Tue, Sep 11, 2012 at 10:25 AM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC <[email protected]> wrote: Just a follow on question to my previous email... Is this functionality of setting limits on intersection results only found in later versions of OSG? I'm currently using OSG 2.9.11 and I can't find any support for this. I guess this would explain why I asked the questions in the first place. If true, I need to upgrade to a later version like 3.0.1... -Shayne -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Tueller,Shayne R Civ USAF AFMC 519 SMXS/MXDEC Sent: Tuesday, September 11, 2012 11:13 AM To: OpenSceneGraph Users Subject: Re: [osg-users] LineSegmentIntersector question... Farshid, Thanks much for the input and addressing my questions. That is good news that the support is there. I'm assuming the default is NO_LIMIT. Is this true? Thanks, -Shayne -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Farshid Lashkari Sent: Tuesday, September 11, 2012 11:08 AM To: OpenSceneGraph Users Subject: Re: [osg-users] LineSegmentIntersector question... Hi Shayne, The base osgUtil::Intersector class supports setting the limits on intersection results, using the setIntersectionLimit() method. The current options are NO_LIMIT, LIMIT_ONE_PER_DRAWABLE, LIMIT_ONE, LIMIT_NEAREST. On Tue, Sep 11, 2012 at 9:47 AM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC <[email protected]> wrote: 1) Does it support a feature of detecting a "hit" and then returning without the need to compute all the intersections? This would be sort of like a visibility test. Set the intersection limit to LIMIT_ONE 2) Does it have the ability to find the closest intersection without the need to compute all the intersections? In other words, does it step along from the starting point of the line segment until an intersection is found and then bail out? Set the intersection limit to LIMIT_NEAREST. This mode could be optimized more, but it will currently reject a subgraph if the nearest point of the bounding sphere is further than the nearest hit. So it can still provide significant savings in computation time. Cheers, Farshid 3) If it doesn't support these features, is it possible to modify the LineSegmentIntersector to support these? I would think that having this capability would improve performance where applicable. Thanks for any input in advance... -Shayne _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.o r g> _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.o r g> _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
