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OS/2 Shareware BBS: 10 Tools
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InterViews
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Graphic
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util.h
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C/C++ Source or Header
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1990-12-11
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2KB
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74 lines
/*
* Copyright (c) 1987, 1988, 1989 Stanford University
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Stanford not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Stanford makes no representations about
* the suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Various useful types and functions.
*/
#ifndef util_h
#define util_h
#include <InterViews/defs.h>
#include <bstring.h>
#include <math.h>
inline void exch (int& a, int& b) {
int temp = a;
a = b;
b = temp;
}
overload square;
inline int square(int a) { return a *= a; }
inline float square(float a) { return a *= a; }
inline float degrees(float rad) { return rad * 180.0 / M_PI; }
inline float radians(float deg) { return deg * M_PI / 180.0; }
inline float Distance(Coord x0, Coord y0, Coord x1, Coord y1) {
return sqrt(float(square(x0 - x1) + square(y0 - y1)));
}
inline void CopyArray (
const Coord* x, const Coord* y, int n, Coord* newx, Coord* newy
) {
bcopy(x, newx, n * sizeof(Coord));
bcopy(y, newy, n * sizeof(Coord));
}
inline void Midpoint (
double x0, double y0, double x1, double y1, double& mx, double& my
) {
mx = (x0 + x1) / 2.0;
my = (y0 + y1) / 2.0;
}
inline void ThirdPoint (
double x0, double y0, double x1, double y1, double& tx, double& ty
) {
tx = (2*x0 + x1) / 3.0;
ty = (2*y0 + y1) / 3.0;
}
#endif