Wojciech Lewandowski wrote: > > osg::Vec3 projectedPoint = osg::Vec3( x,y,z ) * camera->getViewMatrix() * > camera->getProjectionMatrix(); > bool pointInFrustum = osg::BoundingBox( -1, -1, -1, 1,1,1 ).contains( > projectedPoint ); >
I actually wound up using sceneview->projectObjectIntoWindow(), which likely does the same matrix mult, but seems to return a viewport xy with 0,0 in lower left corner. Then I could just do a 2D viewport limit check. The above code looks like it assumes it would get an x,y,z screen location each clamped to -1->1 centered at 0,0,0 - which I guess is what you would get just applying the view and proj transforms without any viewport adjustment? I'm not sure what happens to z here. Thanks. Bob. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Robert > Balfour > Sent: Saturday, December 29, 2007 11:12 PM > To: [email protected] > Subject: [osg-users] Is point in view? > > Is there a straight forward method to determine if a ground xyz target > point (or geode bbox centerpoint) is currently visible (i.e. within the > current view frustrum)? > > I'm drawing a HUD target line, but don't want to draw it if the target > point is not in view. > > Thanks. > > Bob. > -- > Robert E. Balfour, Ph.D. > Exec. V.P. & CTO, BALFOUR Technologies LLC > 960 South Broadway, Suite 108, Hicksville NY 11801 > Phone: (516)513-0030 Fax: (516)513-0027 email: [EMAIL PROTECTED] > _______________________________________________ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
