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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 OSGEARTHSYMBOLOGY_MODEL_SYMBOL_H
#define OSGEARTHSYMBOLOGY_MODEL_SYMBOL_H 1

#include <osgEarth/Common>
#include <osgEarthSymbology/Symbol>
#include <osgEarthSymbology/Expression>
#include <osg/Vec3f>

namespace osgEarth { namespace Symbology
{
    class OSGEARTHSYMBOLOGY_EXPORT MarkerSymbol : public Symbol
    {
    public:
        enum Placement
        {
            PLACEMENT_CENTROID,

            PLACEMENT_VERTEX,

            PLACEMENT_INTERVAL,

            PLACEMENT_RANDOM
        };

    public:
        MarkerSymbol( const Config& conf =Config() );

        optional<StringExpression>& url() { return _url; }
        const optional<StringExpression>& url() const { return _url; }        

        optional<Placement>& placement() { return _placement; }
        const optional<Placement>& placement() const { return _placement; }

        optional<float>& density() { return _density; }
        const optional<float>& density() const { return _density; }

        optional<NumericExpression>& scale() { return _scale; }
        const optional<NumericExpression>& scale() const { return _scale; }

        optional<unsigned>& randomSeed() { return _randomSeed; }
        const optional<unsigned>& randomSeed() const { return _randomSeed; }

    public: // non-serialized properties (for programmatic use only)

        void setImage( osg::Image* image ) { _image = image; }
        osg::Image* getImage() const { return _image.get(); }

        void setModel( osg::Node* node ) { _node = node; }
        osg::Node* getNode() const { return _node.get(); }

    public:
        virtual Config getConfig() const;
        virtual void mergeConfig( const Config& conf );

    protected:
        optional<StringExpression>   _url;
        optional<NumericExpression>  _scale;
        optional<Placement>          _placement;
        optional<float>              _density;
        optional<unsigned>           _randomSeed;

        osg::ref_ptr<osg::Image>     _image;
        osg::ref_ptr<osg::Node>      _node;
    };

} } // namespace osgEarth::Symbology

#endif