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OS/2 Shareware BBS: 10 Tools
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yacl-012.zip
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ui
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grutils.cxx
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C/C++ Source or Header
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1995-04-09
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2KB
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67 lines
/*
*
* Copyright (C) 1994, M. A. Sridhar
*
*
* This software is Copyright M. A. Sridhar, 1994. You are free
* to copy, modify or distribute this software as you see fit,
* and to use it for any purpose, provided this copyright
* notice and the following disclaimer are included with all
* copies.
*
* DISCLAIMER
*
* The author makes no warranties, either expressed or implied,
* with respect to this software, its quality, performance,
* merchantability, or fitness for any particular purpose. This
* software is distributed AS IS. The user of this software
* assumes all risks as to its quality and performance. In no
* event shall the author be liable for any direct, indirect or
* consequential damages, even if the author has been advised
* as to the possibility of such damages.
*
*/
#include <math.h>
#include "base/defs.h"
#include "ui/grutils.h"
#ifndef M_PI
#define M_PI 3.1415926535897932
#endif
double DegToRad (double deg)
{
bool negative = FALSE;
if (deg < 0) {
negative = TRUE;
deg = -deg;
}
// Reduce it modulo 360
deg = ((long) deg) % 360 + (deg - ((long) deg));
double rad = M_PI * deg / 180;
if (negative)
rad = 2 * M_PI - rad;
return rad;
}
double RadToDeg (double rad)
{
double deg = rad * 180 / M_PI;
bool negative = FALSE;
if (deg < 0) {
negative = TRUE;
deg = -deg;
}
// Reduce it modulo 360
deg = ((long) deg) % 360 + (deg - ((long) deg));
if (negative)
deg = 360 - deg;
return deg;
}