Sorry I meant an ordinary Hud as in the osghud sample.
> * 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). > That's what I did. > * 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. > Yes - that's what I was doing, based on the keyboardmouse example. > * As you get mouse drag events, update the vertices/corners of the line loop > to reflect the rectangle that the user is defining. > That's the sticking point - the Hud camera is attached to the scene as a geode, how do I change the vertices in a node that's part of the scenegraph? > * 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. Shouldn't I use a PolytopeIntersector ? Thanks ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=9378#9378 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
