VTK: dox/Common/Core/vtkMathUtilities.h Source File

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    vtkMathUtilities.h
00005 
00006   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00007   All rights reserved.
00008   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00015 
00029 #ifndef __vtkMathUtilities_h
00030 #define __vtkMathUtilities_h
00031 
00032 #include <cmath>
00033 #include <limits>
00034 
00035 namespace vtkMathUtilities
00036 {
00037 
00039 
00040 template<class A>
00041 bool FuzzyCompare(A a, A b)
00042 {
00043   return fabs(a - b) < std::numeric_limits<A>::epsilon();
00044 }
00046 
00048 
00050 template<class A>
00051 bool FuzzyCompare(A a, A b, A epsilon)
00052 {
00053   return fabs(a - b) < epsilon;
00054 }
00056 
00057 } // End vtkMathUtilities namespace.
00058 
00059 #endif // __vtkMathUtilities_h
00060 // VTK-HeaderTest-Exclude: vtkMathUtilities.h