/* -*-c++-*- */
/* osgEarth - Geospatial SDK for OpenSceneGraph
 * Copyright 2019 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/>
 */

#include "GLSkyOptions"
#include <osgEarthUtil/Sky>
#include <osgEarth/PhongLightingEffect>
#include <osg/MatrixTransform>

namespace osg {
    class EllipsoidModel;
    class Light;
    class LightSource;
}

namespace osgEarth { namespace GLSky
{
    using namespace osgEarth;
    using namespace osgEarth::Util;

    /**
     * Node that roots the silverlining adapter.
     */
    class GLSkyNode : public SkyNode
    {
    public:
        GLSkyNode(const GLSkyOptions& options);

    public: // SkyNode

        osg::Light* getSunLight() const { return _light.get(); }

        void attach(osg::View* view, int lightNum);

        void onSetEphemeris();
        void onSetDateTime();
        void onSetReferencePoint();

    protected:
        virtual ~GLSkyNode();

    private:
        void construct();

        osg::ref_ptr<osg::Light>          _light;
        osg::ref_ptr<PhongLightingEffect> _lighting;
        GLSkyOptions                      _options;
    };

} } // namespace osgEarth::Drivers::GLSky
