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MapLocation.h

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//
//      Copyright (C) 2002 Robert Renaud
//
//      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.
//
//      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, write to the Free Software
//      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//

#ifndef MAP_LOCATION_H
#define MAP_LOCATION_H

#include "../Config.h"

#include "SDL.h"

#include "Constants.h"
#include "GameDebug.h"

#include "../Parse/ListParser.h"

namespace Game {

        class MapLocation : public Parse::Parseable {
        public:
                MapLocation();
                MapLocation(int x, int y);
                MapLocation(const MapLocation& other);
                Parse::Parser* makeParserToParseMe(std::istream& input);
                
                int getMapX() const;
                
                int getMapY() const;

                bool operator < (const MapLocation& other) const;
                
                bool operator == (const MapLocation& other) const;
        protected:
                int x;
                int y;
        };

        class MapLocAt {
        public:
                MapLocAt(int x, int y);
                bool operator()(MapLocation* m);
        private:
                int x;
                int y;
        };

        /* TileFunctions functions used in calculating the number of pixels between
        *       between a point and the next tile, and at which tile a specific point is.  The slack
        *       functions that take an SDL_Rect& argument are equilivent to the ones that take single
        *       Sint16.  If the function is a horizontal one, eg. getRightSlack(const SDL_Rect& pic),
        *       it returns the exact same thing that getRightSlack(pic.x) would.  The getDirTile functions
        *       return the tile that a given pixel is on.  The offset is positive to the right for the
        *       horizontal getDirTile() funcs, and positive upwards for the vertical getDirTile() funcs.
        */
        
        int getDownSlack        (const SDL_Rect& picPosition);  
        int getLeftSlack        (const SDL_Rect& picPosition);
        int getRightSlack       (const SDL_Rect& picPosition);
        int getUpSlack          (const SDL_Rect& picPosition);

        int getDownSlack        (Sint16 y);
        int getUpSlack          (Sint16 y);
        int getRightSlack       (Sint16 x);
        int getLeftSlack        (Sint16 x);

        int getDownTile         (Sint16 y, int offset=0);
        int getUpTile           (Sint16 y, int offset=0);
        int getRightTile        (Sint16 x, int offset=0);
        int getLeftTile         (Sint16 x, int offset=0);

        int getNearestHorizTile(Sint16 xPixel);
        int getNearestVertTile(Sint16 yPixel);

        MapLocation getLocation(const SDL_Rect& rect);
};

#endif

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