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/***************************************************************************
 *   Copyright (C) 2007, 2008 by Andreas Theofilu                          *
 *   andreas@theosys.at                                                    *
 *                                                                         *
 *   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 version 3 of the License.                *
 *                                                                         *
 *   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 _TRANSFORM_H
#define _TRANSFORM_H

#include <math.h>

#define DEGREES      180.0
#define SEMICIRCLES  0x80000000

#define SEMI2DEG(a)  (double)(a) * DEGREES / SEMICIRCLES
#define DEG2SEMI(a)  rint((double)(a) * SEMICIRCLES / DEGREES)

#define DEG2RAD(a)   (a) * M_PI / DEGREES
#define RAD2DEG(a)   (a) * DEGREES / M_PI

class transform
{
        public:
           transform(double _llat, double _llon, double _rlat, double _rlon);
           ~transform();

           void setDimensions(int _width, int _height);
           void setScale(double scx, double scy);
           void getScale(double *scx, double *scy);
           bool latLonToPix(double plat, double plon, int *px, int *py);
           long getOffset(double plat, double plon);
           bool cutImage(double _llat, double _llon, double _rlat, double _rlon, QString fName);

        private:
           double llat, llon, rlat, rlon;
           double xscale, yscale;
           int width, height;
           int MapXCtr;
           int MapYCtr;
           int PixPerLatDeg;
           int PixPerLonDeg;
           double MapLatCtr;
           double MapLonCtr;

};

#endif