Thanks Terry, Brain and Robert, I will follow all your ViewPoint suggestions tomorrow.
Wojtek -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Robert Osfield Sent: Tuesday, February 26, 2008 9:24 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Problem to consider: Shadow maps and LOD computation Hi Guys, You are on the right track with ViewPoint - it exists to solve this problem - a RTT effect that needs to have LOD's chosen on the main cameras view point (eye point) not the RTT's camera's eye point. I introduced it when Terry Welsh came across this problem when he was doing his development of his implementation of parallel split shadow maps. I've just got back so I'm a bit cold on this topic right now, perhaps Terry will remember things better than I... Robert. On Tue, Feb 26, 2008 at 5:46 PM, Brian R Hill <[EMAIL PROTECTED]> wrote: > Wojtek, > > I don't know. I just looked at the LOD::traverse method and saw that it > called the node visitor getDistanceToViewPoint method, which for the > CullVisitor calls the CullStack::getViewPointLocal method. > > Ooops, looks like you'll need to override > CullVisitor::getDistanceToViewPoint, not CullVisitor::getViewPoint. Also, > the view point will need to be relative to the LOD object. > > I searched the entire OSG tree and only LOD and PagedLOD call > getDistanceToViewPoint, so it should be pretty safe. > > Caveat - I've only looked at the code and haven't tried this. > > > Brian > > [EMAIL PROTECTED] wrote: ----- > > > To: "OpenSceneGraph Users" <[email protected]> > From: "Wojciech Lewandowski" <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > Date: 02/26/2008 12:15PM > > Subject: Re: [osg-users] Problem to consider: Shadow maps and LOD > computation > > > > Hi Brian, > > > It looks like you'll need to create a custom cull visitor that stores the > > desired eye point and overrides the CullVisitor::getViewPoint method to > > return the stored eye point instead of the CullStack view point. > > Thats sounds like it something I might be able to do ;-). Do you know if > changed viewPoint would affect other types of nodes apart from LOD ? > > Thanks, > Wojtek > > _______________________________________________ > osg-users mailing list > [email protected] > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org--- ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- --------------------- > > This is a PRIVATE message. If you are not the intended recipient, please > delete without copying and kindly advise us by e-mail of the mistake in > delivery. NOTE: Regardless of content, this e-mail shall not operate to > bind CSC to any order or other contract unless pursuant to explicit written > agreement or government initiative expressly permitting the use of e-mail > for such purpose. > ------------------------------------------------------------------------- ---------------------------------------------------------------------------- --------------------------- > > _______________________________________________ > > > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
