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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | /*=========================================================================
Program: Visualization Toolkit
Module: vtkMathUtilities.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkMathUtilities - templated utility math functions intended for
// internal use in tests etc.
//
// .SECTION Description
// Provide a set of inline, lightweight templated math utility functions.
// The initial motivation is to provide a few lightweight functions to help in
// testing and internal implementation files.
#ifndef __vtkMathUtilities_h
#define __vtkMathUtilities_h
#include <cmath>
#include <limits>
namespace vtkMathUtilities
{
// Description:
// Perform a fuzzy compare of floats/doubles.
template<class A>
bool FuzzyCompare(A a, A b)
{
return fabs(a - b) < std::numeric_limits<A>::epsilon();
}
//Description:
// Perform a fuzzy compare of floats/doubles, specify the allowed tolerance
template<class A>
bool FuzzyCompare(A a, A b, A epsilon)
{
return fabs(a - b) < epsilon;
}
} // End vtkMathUtilities namespace.
#endif // __vtkMathUtilities_h
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