Hi Hakan, If you want to simply drag (or do other transformation to) an object you can use the Dragger from the osgManipulator pluggin:
Code: osgManipulator::TranslateAxisDragger Otherwise you need to project the mouse to the world space. If I recall correctly: Code: osgViewer::View *view = dynamic_cast<osgViewer::View *>(&actionAdapter); const osg::Camera *camera = view->getCamera(); const osg::Matrixd viewMatrix = camera->getViewMatrix(); const osg::Matrix projectionMatrix = camera->getProjectionMatrix(); osg::Matrix inverseCameraMatrix; inverseCameraMatrix.invert(viewMatrix * projectionMatrix); osg::Vec3 worldPosition = osg::Vec3(ea.getXnormalized(), ea.getYnormalized(), 0.0f) * inverseCameraMatrix; The z value of the Vec3 is the Near Plane, set it to 1.0 to have the Far Plane projection. Best, Florian ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=72440#72440 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org