sun.h

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/**********************************************************************
** Copyright (C) 2000 Trolltech AS.  All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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**********************************************************************/
/*
 * Sun clock definitions.
 */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

#ifndef PI
#define PI 3.14159265358979323846
#endif

#ifndef E
#define E 2.7182818284590452354
#endif

#define abs(x) ((x) < 0 ? (-(x)) : x)                     /* Absolute value */
#define sgn(x) (((x) < 0) ? -1 : ((x) > 0 ? 1 : 0))       /* Extract sign */
#define dtr(x) ((x) * (PI / 180.0))                       /* Degree->Radian */
#define rtd(x) ((x) / (PI / 180.0))                       /* Radian->Degree */
#define fixangle(a) ((a) - 360.0 * (qFloor((a) / 360.0)))  /* Fix angle   */

#define TERMINC  100               /* Circle segments for terminator */

#define PROJINT  (60 * 10)         /* Frequency of seasonal recalculation */


#ifdef __cplusplus
extern "C" {
#endif
double jtime(struct tm *t);
double kepler(double m, double ecc);
void sunpos(double jd, int apparent, double *ra, double *dec, double *rv, double *slong);
void projillum(short *wtab, int xdots, int ydots, double dec);
#ifdef __cplusplus
};
#endif

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