Hi Nitin,
Try with this code:
Code:
// create a camera to set up the projection and model view matrices, and the
subgraph to drawn in the HUD
osg::Camera* camera = new osg::Camera;
// set the projection matrix
camera->setProjectionMatrix(osg::Matrix::ortho2D(0,width,0,height));
// set the view matrix
camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
camera->setViewMatrix(osg::Matrix::identity());
// only clear the depth buffer
camera->setClearMask(GL_DEPTH_BUFFER_BIT);
// draw subgraph after main camera view.
camera->setRenderOrder(osg::Camera::POST_RENDER);
// we don't want the camera to grab event focus from the viewers main
camera(s).
camera->setAllowEventFocus(false);
camera->addChild(mGeode);
Cheers,
Aitor
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=27607#27607
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