/usr/include/osgManipulator/TrackballDragger is in libopenscenegraph-dev 3.2.1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * OpenSceneGraph Public License for more details.
*/
//osgManipulator - Copyright (C) 2007 Fugro-Jason B.V.
#ifndef OSGMANIPULATOR_TRACKBALLDRAGGER
#define OSGMANIPULATOR_TRACKBALLDRAGGER 1
#include <osgManipulator/RotateCylinderDragger>
#include <osgManipulator/RotateSphereDragger>
namespace osgManipulator {
/**
 * Dragger for performing rotation in all axes.
 */
class OSGMANIPULATOR_EXPORT TrackballDragger : public CompositeDragger
{
    public:
        TrackballDragger(bool useAutoTransform=false);
        META_OSGMANIPULATOR_Object(osgManipulator,TrackballDragger)
        /** Setup default geometry for dragger. */
        void setupDefaultGeometry();
    protected:
        virtual ~TrackballDragger();
        osg::ref_ptr<RotateCylinderDragger> _xDragger;
        osg::ref_ptr<RotateCylinderDragger> _yDragger;
        osg::ref_ptr<RotateCylinderDragger> _zDragger;
        osg::ref_ptr<RotateSphereDragger>   _xyzDragger;
};
}
#endif
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