starhopper.h

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/***************************************************************************
                starhopper.h  -  Star Hopping Guide for KStars
                             -------------------
    begin                : Mon 23rd Aug 2010
    copyright            : (C) 2010 Akarsh Simha
    email                : akarshsimha@gmail.com
***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef _STARHOPPER_H_
#define _STARHOPPER_H_

#include "skypoint.h"
#include "skyobject.h"
#include "starobject.h"

class StarHopper {

 public:

    QList<StarObject const *> computePath( const SkyPoint &src, const SkyPoint &dest, float fov_, float maglim_ );

 private:
    float fov;
    float maglim;

    // Useful for internal computations
    SkyPoint const *start;
    SkyPoint const *end;
    QHash<const SkyPoint *, const SkyPoint *> came_from; // Used by the A* search algorithm
    QList<StarObject const *> result_path;

    float cost( const SkyPoint *curr, const SkyPoint *next );

    void reconstructPath( SkyPoint const *curr_node );

};

#endif