/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2013 Pelican Mapping
 * http://osgearth.org
 *
 * osgEarth is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef OSGEARTH_LAYER_H
#define OSGEARTH_LAYER_H 1

#include <osgEarth/Common>

namespace osgEarth
{
    class SequenceControl;

    /**
     * Base class for all Map layers. 
     */
    class OSGEARTH_EXPORT Layer : public osg::Referenced
    {
    public:
        Layer();

        /** dtor */
        virtual ~Layer() { }

        /**
         * Gets this layer's unique ID.
         */
        const UID getUID() const { return _uid; }

        /**
         * Sequence controller if the layer has one.
         */
        virtual SequenceControl* getSequenceControl() { return 0L; }


    private:
        UID _uid;
    };

} // namespace osgEarth

#endif // OSGEARTH_IMAGE_TERRAIN_LAYER_H
