source: osgVisual/include/object/object_updater.h @ 32

#pragma once
/* -*-c++-*- osgVisual - Copyright (C) 2009-2010 Torben Dannhauer
 *
 * This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under 
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
 * You have to aquire licenses for all used proprietary modules.
 * 
 * This library 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
 * OpenSceneGraph Public License for more details.
*/

#include <osg/Node>
#include <osg/Notify>
#include <visual_object.h>

namespace osgVisual
{ 
class visual_object;    // Forward declaration


/**
 * \brief This class is the base class for visual_object updater.
 * 
 * This base implementation updates the object position with the slotnames
 *  object_->getName()+"_POS_LAT", object_->getName()+"_POS_LON", object_->getName()+"_POS_ALT",
 * object_->getName()+"_ROT_X", object_->getName()+"_ROT_Y", object_->getName()+"_ROT_Z", 
 * 
 * To implement custom updaters, please derive from this class and overwrite the functions preUpdate(..) and postUpdate(..).
 * Take care to call nested preUpdater and postUpdater to allow updater chains.
 * 
 * @author Torben Dannhauer
 * @date  Apr 2010
 */ 
class object_updater : public osg::Node
{
public:
        /**
         * \brief Empty constructor
         * 
         * @param object_ : Pointer to the object, calling the constructor (currently not used)
         */ 
        object_updater(osgVisual::visual_object* object_ );

        /**
         * \brief Empty destructor
         * 
         * @return 
         */ 
        virtual ~object_updater(void);

        /**
         * \brief This function is called by visual_object before rendering (preFrame).
         * 
         * This updater function should be used to update the objects state like size, position, attitude etc.
         * 
         * @param object_ : Pointer to the object calling this updater.
         */ 
        virtual void preUpdate(osgVisual::visual_object* object_ );

        /**
         * \brief This function is called by visual_object after rendering (postFrame).
         * 
         * This updater function should be used for all actions which require the object status of that frame like HAT/HOT etc.
         * 
         * @param object_ : Pointer to the object calling this updater.
         */ 
        virtual void postUpdate(osgVisual::visual_object* object_);

        /**
         * \brief Returns pointer to this updater.
         * 
         * This function is used for updater list management.
         * 
         * @return : Pointer to this updater.
         */ 
        object_updater* getPointer(){return this;};

        /**
         * \brief This function adds an object_updater as nested updater.
         * 
         * The nested Updater will be executed in pre and post traversal after this updater.
         * 
         * @param updater_ 
         */ 
        void addUpdater( object_updater* updater_ );

protected:
        /**
         * Pointer to nested updater.
         */ 
        osg::ref_ptr<object_updater> updater;

};

}       // END NAMESPACE