I'm not sure what an osgHud is, and I'm not sure what you would use a PAT for in this case, so maybe I'm misunderstanding your question.
Here's how I'd do it: * Add a Camera Node to your scene graph, configured to post render, and set the Camera's View and Projection to allow screen-space rendering (just as you would for any normal HUD). * Attach a Geode (with a Geometry) as a child of this Camera. * When you get a mouse down event, configure the Geometry to render a 4-vertex line loop, and initialize the 4 vertices to the current mouse position. * As you get mouse drag events, update the vertices/corners of the line loop to reflect the rectangle that the user is defining. * When you get a mouse up event, define a frustum from the 4 vertices, the near/far planes, and your viewpoint, and intersect this with your scene graph. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 -----Original Message----- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Martin Beckett Sent: Friday, March 27, 2009 4:35 PM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Moving osgHud I am trying to select nodes in a scene with a mouse drawn rectangle. The first step is to draw the selected region. I am trying to use an osgHud but it's not obvious how you can change the drawables - are you supposed to attach the Hud to a PositionAttitudeTransform? Anyone have an example of how to do this? ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=9372#9372 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
