Hi Viggo, Some time ago there was a thread called "How to retrieve a U, V texture coordinate from a picking action ?".
http://thread.gmane.org/gmane.comp.graphics.openscenegraph.user/26306/focus=26352 Regrads, Brede On Tue, Jul 29, 2008 at 9:23 AM, Viggo Løvli <[EMAIL PROTECTED]> wrote: > Hi, > > I want to do a ray-intersection toward a tree model (as an example) and > ignore the hit-location if it contain zero alpha value. Basically this is a > line-of-sight-check that take textures into consideration. > > I think a good way is to use the existing intersection system and thus > produce a list of hit-locations. I will then for each hit location need to > figure out what alpha-value it holds. I can then ignore those hit-locations > that we can see through. > > So, I am looking for a scene-graph color-picker. > > Does anybody have something like this that they want to share? > > Note: I am not looking for something that use hardware to render part of the > scene and then a read-back from hardware. This should be CPU only :-) > > Regards, > Viggo > > > ________________________________ > Få Hotmail du også. Windows Live Hotmail nå med 5000 MB gratis > lagringsplass. > _______________________________________________ > 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
