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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkFEMUtility.h,v $
Language: C++
Date: $Date: 2009-01-30 21:53:03 $
Version: $Revision: 1.15 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/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 notices for more information.
=========================================================================*/
#ifndef __itkFEMUtility_h
#define __itkFEMUtility_h
#include <string>
#include <iostream>
namespace itk {
namespace fem {
/**
* \file itkFEMUtility.h
* \brief Includes various helper classes and functions used
througout the FEM code.
*/
/**
* \class GaussIntegrate
* \brief Use the Gauss-Legendre formula to perform integration
*
* Numerical integration (Gauss-Legendre formula).
* Integrates function f(x) from x=a to x=b in n points.
*/
class GaussIntegrate {
public:
static const double zero;
static const double one;
static const double two;
static const double z[110];
static const double w[110];
double Integrate(double (*f)(double), double a, double b, int n=3);
};
}} /* end namespace itk */
#endif /* #ifndef __itkFEMUtility_h */
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