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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkFEMUtility_h
#define itkFEMUtility_h
#include <string>
#include <iostream>
#include "metaObject.h"
#include "ITKFEMExport.h"
class MetaObject;
namespace itk
{
namespace fem
{
/**
* \file itkFEMUtility.h
* \brief Includes various helper classes and functions used
throughout 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.
* \ingroup ITKFEM
*/
class ITKFEM_EXPORT 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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