/home/cube/sources/osgearth/src/osgEarthFeatures/Feature

Go to the documentation of this file.

/* -*-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 OSGEARTHFEATURES_FEATURE_H
#define OSGEARTHFEATURES_FEATURE_H 1

#include <osgEarthFeatures/Common>
#include <osgEarthSymbology/Geometry>
#include <osgEarthSymbology/Style>
#include <osgEarth/SpatialReference>
#include <osg/Array>
#include <map>
#include <list>

namespace osgEarth { namespace Features
{
    using namespace osgEarth;
    using namespace osgEarth::Symbology;

    class OSGEARTHFEATURES_EXPORT FeatureProfile : public osg::Referenced
    {
    public:        
        FeatureProfile( const GeoExtent& extent );

        const GeoExtent& getExtent() const {
            return _extent; }

        const SpatialReference* getSRS() const {
            return _extent.getSRS(); }

        bool getTiled() const;
        void setTiled(bool tiled);

        int getFirstLevel() const;
        void setFirstLevel(int firstLevel );

        int getMaxLevel() const;
        void setMaxLevel(int maxLevel);

        const osgEarth::Profile* getProfile() const;
        void setProfile( const osgEarth::Profile* profile );

    protected:
        osg::ref_ptr< const osgEarth::Profile > _profile;
        GeoExtent _extent;
        bool _tiled;
        int _firstLevel;
        int _maxLevel;
    };

    struct AttributeValueUnion
    {
        std::string stringValue;
        double      doubleValue;
        int         intValue;
        bool        boolValue;
    };

    enum AttributeType
    {
        ATTRTYPE_UNSPECIFIED,
        ATTRTYPE_STRING,
        ATTRTYPE_INT,
        ATTRTYPE_DOUBLE,
        ATTRTYPE_BOOL
    };

    struct OSGEARTHFEATURES_EXPORT AttributeValue : public std::pair<AttributeType,AttributeValueUnion>
    {
        std::string getString() const;
        double getDouble( double defaultValue =0.0 ) const;
        int getInt( int defaultValue =0 ) const;
        bool getBool( bool defaultValue =false ) const;
    };

    typedef std::map<std::string, AttributeValue> AttributeTable;

    typedef unsigned long FeatureID;

    typedef std::map< std::string, AttributeType > FeatureSchema;

    class OSGEARTHFEATURES_EXPORT Feature : public osg::Object
    {
    public:
        Feature( FeatureID fid =0L );

        Feature( Geometry* geom, const Style& style =Style(), FeatureID fid =0L );

        Feature( const Feature& rhs, const osg::CopyOp& copyop =osg::CopyOp::DEEP_COPY_ALL );

        META_Object( osgEarthFeatures, Feature );

    public:

        FeatureID getFID() const;

        void setGeometry( Symbology::Geometry* geom ) { _geom = geom; }

        Symbology::Geometry* getGeometry() { return _geom.get(); }

        const Symbology::Geometry* getGeometry() const { return _geom.get(); }

        const AttributeTable& getAttrs() const { return _attrs; }

        void set( const std::string& name, const std::string& value );
        void set( const std::string& name, double value );
        void set( const std::string& name, int value );
        void set( const std::string& name, bool value );

        bool hasAttr( const std::string& name ) const;

        std::string getString( const std::string& name ) const;
        double getDouble( const std::string& name, double defaultValue =0.0 ) const;
        int getInt( const std::string& name, int defaultValue =0 ) const;
        bool getBool( const std::string& name, bool defaultValue =false ) const;

        optional<Style>& style() { return _style; }
        const optional<Style>& style() const { return _style; }

        optional<GeoInterpolation>& geoInterp() { return _geoInterp; }
        const optional<GeoInterpolation>& geomInterp() const { return _geoInterp; }

        double eval( NumericExpression& expr ) const;
        
        const std::string& eval( StringExpression& expr ) const;

    protected:
        FeatureID                         _fid;
        osg::ref_ptr<Symbology::Geometry> _geom;
        AttributeTable                    _attrs;
        optional<Style>                   _style;
        optional<GeoInterpolation>        _geoInterp;
    };

    typedef std::list< osg::ref_ptr<Feature> > FeatureList;

} } // namespace osgEarth::Features

#endif // OSGEARTHFEATURES_FEATURE_H