On Tue, 2007-06-12 at 21:08 +0100, Robert Osfield wrote: > NodeMask/ TraversalMask combination is how I'd tackle this.
Simple, easy--works for me. :) Sometimes all you need is a respected second opinion! > On 6/12/07, Jeremy L. Moles <[EMAIL PROTECTED]> wrote: > > Sorry to be so verbose today (lots of posts!) > > > > I'm trying to come up with a good way to pick HUD elements from my > > scene. I'm using a very basic "camera-in-camera" setup, where my main > > camera is abstracted in osgViewer and my HUD camera is an ortho camera > > attached to a Group. This is really straightforward and demonstrated in > > many examples, so I'm pretty sure I'm not doing anything wrong as far as > > setup is concerned (though I can't be sure). > > > > I can use computeIntersections on the entire scene and it works exactly > > as advertised; both my HUD elements and objects in the 3D scene. The > > problem, as it so often is, arises from a destire to optimize. > > > > What I want to do is only run computeIntersections on anything attached > > to my HUD camera. I believe the method for doing this (which I have > > tried to confirm by searching the list archives) is to run > > computeIntersections with a NodePath reference, which I can get using > > getParentalNodePaths. > > > > My question is: what is the proper way to create the NodePath to achieve > > the desired functionality? I've tried using: > > > > _uiCamera->getParentalNodePaths()[0] > > > > ...but this doesn't seem to work at all. What I suspect I'm missing is > > either some setup code before computerIntersections with regards to the > > orthographic projection or perhaps I'm misunderstanding the purpose of > > the NodePath version of computerIntersections and it's usefulness in HUD > > picking. > > > > I thought an alternative might be to use a NodeMask, having one mask for > > my UI elements and another mask for everything else. As long as the > > uiCamera also had this mask--and was very high up in the graph--this > > might be another fast option, right? > > > > _______________________________________________ > > osg-users mailing list > > osg-users@openscenegraph.net > > http://openscenegraph.net/mailman/listinfo/osg-users > > http://www.openscenegraph.org/ > > > _______________________________________________ > osg-users mailing list > osg-users@openscenegraph.net > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
