hi robert, thanx for your answer. it helped me out. but how do i accumulate the matrix efficiently?
cheers, carsten Zitat von Robert Osfield <[EMAIL PROTECTED]>: > Hi Carsten, > > The CameraView node is meant to be placed within the scene graph as a > leaf node, the accumulated transform matrix down to the CameraView > provides its final position in space just like any other node. > CameraView is a passive object, effectively a marker that you put into > the scene graph it doesn't do any rendering itself. One would use it > for marking various view points in the scene, or for creating a camera > view that tracks a node in the scene i.e. a car. > > To render the view one must get the the accumulated view matrix (the > world to local transform) and pass it onto the viewers Camera setting > it's view matrix. Right now there isn't a convenience method built > into osgViewer for doing this, so you'll need to manage this in your > own application. You could use the NodeTrackerManipulator for to > attach to the CameraView, but this manipulator is general purpose and > doesn't know about some of the specific features of CameraView. > > CameraView isn't widely used, which is why it hasn't been wired up in > osgViewer, perhaps further down the line we'll revisit this, feel free > to contribute to this effort. > > > Robert. > > > On 8/28/07, Carsten Scharfe <[EMAIL PROTECTED]> wrote: >> hi there, >> >> do i understand the functionality of the cameraview node correct? >> >> i assume, that cameraview is used to position the camera (and >> animate, of course) >> within the scene, without having to manipulate view matrices directly. >> >> but then how do i retrieve the actual viewing matrix, if the camera >> is positioned >> by a cameraview? >> >> what happens if geometry is attached as a child of a camera node? >> >> maybe someone can help me out? >> >> cheers, >> carsten scharfe >> _______________________________________________ >> 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 > ------------------------------------------------------------------------------ Carsten Scharfe Student of Computer Science University of Paderborn AR/VR Team Fuerstenallee 11 Heinz Nixdorf Institute 33102 Paderborn (Germany) ------------------------------------------------------------------------------ Fon: 05251/606229 (HNI - VR Lab) E-Mail: [EMAIL PROTECTED] [EMAIL PROTECTED] [EMAIL PROTECTED] ------------------------------------------------------------------------------ The dragon has woken up ! ------------------------------------------------------------------------------ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
