libosgearth-dev 2.5.0+dfsg-8build1 / usr / include / osgEarthAnnotation / AnnotationNode

/* -*-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_ANNO_ANNOTATION_NODE_H
#define OSGEARTH_ANNO_ANNOTATION_NODE_H 1

#include <osgEarthAnnotation/Common>
#include <osgEarthAnnotation/AnnotationData>
#include <osgEarthAnnotation/Decoration>
#include <osgEarthSymbology/Style>
#include <osgEarth/DepthOffset>
#include <osgEarth/MapNodeObserver>
#include <osgEarth/Terrain>
#include <osgEarth/TileKey>


#define META_AnnotationNode(library,name) \
    META_Node(library,name) \
    virtual bool accept(Decoration* ds, bool enable) { return ds->apply(*this, enable); }

#define META_AnnotationNodeAbstract(library,name) \
    virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const name *>(obj)!=NULL; } \
    virtual const char* className() const { return #name; } \
    virtual const char* libraryName() const { return #library; } \
    virtual void accept(osg::NodeVisitor& nv) { if (nv.validNodeMask(*this)) { nv.pushOntoNodePath(this); nv.apply(*this); nv.popFromNodePath(); } } \
    virtual bool accept(Decoration* ds, bool enable) { return ds->apply(*this, enable); }

// forward decs
namespace osgEarth
{
    class MapNode;
}


namespace osgEarth { namespace Annotation
{	
    using namespace osgEarth;
    using namespace osgEarth::Symbology;

    /**
     * Base class for all annotation node types.
     */
    class OSGEARTHANNO_EXPORT AnnotationNode : public osg::Group,
                                               public MapNodeObserver
    {
    public:
        META_AnnotationNode(osgEarthAnnotation, AnnotationNode);

        /**
         * Annotation data attached to this annotation node.
         */
        virtual void setAnnotationData( AnnotationData* data );
        AnnotationData* getAnnotationData() const { return _annoData.get(); }
        AnnotationData* getOrCreateAnnotationData();

        /**
         * Sets the node to "dynamic", i.e. sets up the node so that you can
         * safely change it at runtime.
         */
        virtual void setDynamic( bool value );

        /** 
         * Gets the attach point for children of this node
         */
        virtual osg::Group* getChildAttachPoint();

        /**
         * Serialized this annotation node so you can re-create it later
         */
        virtual Config getConfig() const { return Config(); }


    public: // decoration support

        /**
         * Installs a decoration on this annotation node.
         */
        void installDecoration( const std::string& name, Decoration* ds );

        /**
         * Uninstalls a decoration on this annotation node.
         */
        void uninstallDecoration( const std::string& name );

        /**
         * Gets the current decoration
         */
        const std::string& getDecoration() const;

        /**
         * Activates a named decoration that was installed previously
         */
        virtual void setDecoration( const std::string& name );

        /**
         * Clears any decoration.
         */
        virtual void clearDecoration();

        /**
         * Whether this annotation has the specified decoration installed.
         */
        bool hasDecoration( const std::string& name ) const;

    public: // MapNodeObserver

        virtual void setMapNode( MapNode* mapNode );

        MapNode* getMapNode() { return _mapNode.get(); }
        const MapNode* getMapNode() const { return _mapNode.get(); }


    public: // Style functions

        virtual void setStyle(const Style& style) { }

        virtual const Style& getStyle() const { return s_emptyStyle; }


    protected:

        osg::ref_ptr<AnnotationData> _annoData;
        bool                         _dynamic;
        bool                         _autoclamp;
        bool                         _depthAdj;
        osg::ref_ptr<const AltitudeSymbol> _altitude;

        DepthOffsetAdapter _doAdapter;

        typedef std::map<std::string, osg::ref_ptr<Decoration> > DecorationMap;
        DecorationMap _dsMap;
        Decoration*   _activeDs;
        std::string   _activeDsName;


        bool supportsAutoClamping( const Style& style ) const;
        
        /**
         * Check the altitude symbology (if present) and configure the
         * automatic mesh clamping if necessary.
         */
        virtual void configureForAltitudeMode( const AltitudeMode& mode );

        /**
         * Apply general style information to the node
         */
        virtual void applyStyle( const Style&);
        virtual void applyGeneralSymbology(const Style&);
        
        /**
         * Sets the node to automatically re-clamp its geometry to incoming terrain tiles
         * as they page in (if applicable).
         * Note: you usually don't need to call this directly; it is automatically set
         * based on the symbology. But you can call it to override the automatic setting.
         */
        virtual void setCPUAutoClamping( bool value );

        /**
         * Whether to activate depth adjustment.
         * Note: you usually don't need to call this directly; it is automatically set
         * based on the symbology. But you can call it to override the automatic setting.
         */
        virtual void setDepthAdjustment( bool value );

        /**
         * Sets a lighting override but only if lighting is not already set.
         */
        void setLightingIfNotSet( bool lighting );

        // utility funcion to make a geopoint absolute height
        bool makeAbsolute( GeoPoint& mapPoint, osg::Node* patch =0L ) const;

        // hidden default ctor
        AnnotationNode( MapNode* mapNode =0L );

        // hidden config ctor
        AnnotationNode( MapNode* mapNode, const Config& conf );

        // hidden copy ctor
        AnnotationNode(const AnnotationNode& rhs, const osg::CopyOp& op=osg::CopyOp::DEEP_COPY_ALL) { }

        osg::ref_ptr< TerrainCallback > _autoClampCallback;

    private:
            
        osg::observer_ptr<MapNode>   _mapNode;
        static Style s_emptyStyle;


    public: // internal methods; do not call directly

        virtual void reclamp( const TileKey& key, osg::Node* tile, const Terrain* terrain ) { }

        virtual ~AnnotationNode();
    };

    /**
     * Virtual class for AnnotationNodes with the set/getPosition method
     */
    class PositionedAnnotationNode : public AnnotationNode
    {
    public:

        /**
         * Sets the map position of the node.
         * Returns true upon success.
         */
        virtual bool setPosition( const GeoPoint& p ) =0;

        /**
         * Gets the position (in map coordinates) of the node
         */
        virtual GeoPoint getPosition() const =0;

    protected:

        PositionedAnnotationNode()
            : AnnotationNode() { }

        PositionedAnnotationNode(MapNode* mapNode)
            : AnnotationNode( mapNode ) { }

        PositionedAnnotationNode(MapNode* mapNode, const Config& conf)
            : AnnotationNode( mapNode, conf ) { }
        
    };

} } // namespace osgEarth::Annotation

#endif // OSGEARTH_ANNO_ANNOTATION_NODE_H