/home/cube/sources/osgearth/src/osgEarthDrivers/engine_osgterrain/OSGTerrainOptions

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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2008-2010 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_ENGINE_OSGTERRAIN_DRIVEROPTIONS
#define OSGEARTH_ENGINE_OSGTERRAIN_DRIVEROPTIONS 1

#include <osgEarth/Common>
#include <osgEarth/TerrainOptions>

namespace osgEarth { namespace Drivers
{
    using namespace osgEarth;

    class OSGTerrainOptions : public TerrainOptions // NO EXPORT (header-only)
    {
    public:
        OSGTerrainOptions( const ConfigOptions& options =ConfigOptions() ) : TerrainOptions( options ),
            _skirtRatio( 0.05 ),
            _quickRelease( true ),
            _lodFallOff( 0.0 )
        {
            setDriver( "osgterrain" );
            fromConfig( _conf );
        }

    public:
        optional<float>& heightFieldSkirtRatio() { return _skirtRatio; }
        const optional<float>& heightFieldSkirtRatio() const { return _skirtRatio; }

        optional<bool>& quickReleaseGLObjects() { return _quickRelease; }
        const optional<bool>& quickReleaseGLObjects() const { return _quickRelease; }

        optional<float>& lodFallOff() { return _lodFallOff; }
        const optional<float>& lodFallOff() const { return _lodFallOff; }

    protected:
        virtual Config getConfig() const {
            Config conf = TerrainOptions::getConfig();
            conf.updateIfSet( "skirt_ratio", _skirtRatio );
            conf.updateIfSet( "quick_release_gl_objects", _quickRelease );
            conf.updateIfSet( "lod_fall_off", _lodFallOff );
            return conf;
        }

        virtual void mergeConfig( const Config& conf ) {
            TerrainOptions::mergeConfig( conf );
            fromConfig( conf );
        }

    private:
        void fromConfig( const Config& conf ) {
            conf.getIfSet( "skirt_ratio", _skirtRatio );
            conf.getIfSet( "quick_release_gl_objects", _quickRelease );
            conf.getIfSet( "lod_fall_off", _lodFallOff );
        }

        optional<float> _skirtRatio;
        optional<bool>  _quickRelease;
        optional<float> _lodFallOff;
    };

} } // namespace osgEarth::Drivers

#endif // OSGEARTH_ENGINE_OSGTERRAIN_DRIVEROPTIONS