reactphysics3d/src/mathematics/mathematics_functions.h

/********************************************************************************
* ReactPhysics3D physics library, http://code.google.com/p/reactphysics3d/      *
* Copyright (c) 2010-2013 Daniel Chappuis                                       *
*********************************************************************************
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* This software is provided 'as-is', without any express or implied warranty.   *
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#ifndef MATHEMATICS_FUNCTIONS_H
#define MATHEMATICS_FUNCTIONS_H

// Libraries
#include "../configuration.h"
#include "../decimal.h"

// ReactPhysics3D namespace
namespace reactphysics3d {

// ---------- Mathematics functions ---------- //

// function to test if two real numbers are (almost) equal
// We test if two numbers a and b are such that (a-b) are in [-EPSILON; EPSILON]
inline bool approxEqual(decimal a, decimal b, decimal epsilon = 1.0e-10) {
    decimal difference = a - b;
    return (difference < epsilon && difference > -epsilon);
}

}



#endif