walk_shortest_path.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef PINK_WALK_SHORTEST_PATH_H
#define PINK_WALK_SHORTEST_PATH_H

#include "common/array.h"

namespace Pink {

class WalkLocation;
class WalkMgr;

class WalkShortestPath {
public:
    WalkShortestPath(WalkMgr *manager);
    WalkLocation *next(WalkLocation *start, WalkLocation *destination);

private:
    void add(WalkLocation *wl, double val, WalkLocation *nearest);
    void remove(WalkLocation *location);
    WalkLocation *build();
    WalkLocation *getNearestNeighbor(WalkLocation *location);
    WalkLocation *findNearestNeighbor(WalkLocation *location);
    double getLengthToNearestNeigbor(WalkLocation *location);
    double getWeight(WalkLocation *location);
    void addLocationsToVisit();
    bool isLocationVisited(WalkLocation *location);


    WalkMgr *_manager;
    Common::Array<WalkLocation *> _locations;
    Common::Array<WalkLocation *> _toVisit;
    Common::Array<double> _weight;
    Common::Array<WalkLocation *> _visited;
    Common::Array<WalkLocation *> _nearestNeigbor;
};

} // End of namespace Pink

#endif