PolytopeIntersector should do what you want, alternately you can fire off lines from the four corners of the screen.
On Mon, Jan 14, 2013 at 2:36 AM, Sergey Polischuk <[email protected]> wrote: > I believe you can use osgUtil::PolytopeIntersector for this purpose, but i > didn't used it myself and can't say much more than that. > > 14.01.2013, 12:51, "Yansi Yao" <[email protected]>: > > Thanks for your reply, Sergey. I will try it. > BTW, sometimes, I want to detect the intersection between the camera frustum > and the terrain. So, is there any way to detect the intersection between > a bounding sphere(or box) and the terrain in OSG? > > Cheers > yaoyansi > > ------------------------------ > *发件人：* Sergey Polischuk <[email protected]> > *收件人：* OpenSceneGraph Users <[email protected]> > *发送日期：* 2013年1月14日, 星期一, 4:34 下午 > *主题:* Re: [osg-users] how to keep the camera from being below the terrain? > > Hi > > there is no collision detection in osg. You can use intersectors in > osgUtil and trace rays from camera downwards to check distance from ground, > or use some physics engine to get proper collision detection. > > Cheers. > > 13.01.2013, 20:51, "Yansi Yao" <[email protected]>: > > > Hi all, > I'm going to attach a bounding box or bounding sphere to the camera, and > detect the collision between the terrain and the bounding object. But I > don't know how to detect this collision in osg. Could you tell me how to do > this? or is there any demo for this problem? > > Cheers > yaoyansi > , > _______________________________________________ > 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 > > > , > > _______________________________________________ > 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 > > -- Chris 'Xenon' Hanson, omo sanza lettere. [email protected] http://www.alphapixel.com/ Training * Consulting * Contracting 3D * Scene Graphs (Open Scene Graph/OSG) * OpenGL 2 * OpenGL 3 * OpenGL 4 * GLSL * OpenGL ES 1 * OpenGL ES 2 * OpenCL Digital Imaging * GIS * GPS * osgEarth * Terrain * Telemetry * Cryptography * Digital Audio * LIDAR * Kinect * Embedded * Mobile * iPhone/iPad/iOS * Android @alphapixel <https://twitter.com/alphapixel> facebook.com/alphapixel (775) 623-PIXL [7495]
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