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mathutilities.h
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C/C++ Source or Header
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1980-02-02
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1KB
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43 lines
/*
* mathutilities.h - global math definitions.
*
* Copyright (C) 1992, Christoph Streit (streit@iam.unibe.ch)
* University of Berne, Switzerland
* All rights reserved.
*
* This software may be freely copied, modified, and redistributed
* provided that this copyright notice is preserved on all copies.
*
* You may not distribute this software, in whole or in part, as part of
* any commercial product without the express consent of the authors.
*
* There is no warranty or other guarantee of fitness of this software
* for any purpose. It is provided solely "as is".
*
*/
#ifndef MathUtilities_H
# define MathUtilities_H
#include <math.h>
#ifdef NO_DRAND48
#include <stdlib.h>
inline void srand48(long seed) { srand((int)seed); }
inline double drand48() { return (double)( ((double)rand()) / ((double)(RAND_MAX)) ); }
#else
extern "C" void srand48(long);
extern "C" double drand48();
#endif
typedef double real;
//typedef float real;
const real EPSILON = 0.00001;
inline real dtor(real degree) { return degree*M_PI/180.0; }
inline real rtod(real rad) { return rad*180.0/M_PI; }
inline int equal(real a, real b) { return fabs(a-b) < EPSILON; }
#endif // MathUtilities_H