/usr/include/ITK-4.9/itkElasticBodyReciprocalSplineKernelTransform.hxx is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
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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 itkElasticBodyReciprocalSplineKernelTransform_hxx
#define itkElasticBodyReciprocalSplineKernelTransform_hxx
#include "itkElasticBodyReciprocalSplineKernelTransform.h"
namespace itk
{
template<typename TParametersValueType, unsigned int NDimensions>
ElasticBodyReciprocalSplineKernelTransform<TParametersValueType, NDimensions>::ElasticBodyReciprocalSplineKernelTransform()
{
// Alpha = 8 ( 1 - \nu ) - 1
m_Alpha = 8.0 * ( 1.0 - .25 ) - 1;
}
template<typename TParametersValueType, unsigned int NDimensions>
ElasticBodyReciprocalSplineKernelTransform<TParametersValueType, NDimensions>::
~ElasticBodyReciprocalSplineKernelTransform()
{}
template<typename TParametersValueType, unsigned int NDimensions>
void
ElasticBodyReciprocalSplineKernelTransform<TParametersValueType, NDimensions>
::ComputeG(const InputVectorType & x, GMatrixType & gmatrix) const
{
const TParametersValueType r = x.GetNorm();
const TParametersValueType factor =
( r > 1e-8 ) ? ( -1.0 / r ) : NumericTraits<TParametersValueType>::ZeroValue();
const TParametersValueType radial = m_Alpha * r;
for ( unsigned int i = 0; i < NDimensions; i++ )
{
const typename InputVectorType::ValueType xi = x[i] * factor;
// G is symmetric
for ( unsigned int j = 0; j < i; j++ )
{
const TParametersValueType value = xi * x[j];
gmatrix[i][j] = value;
gmatrix[j][i] = value;
}
gmatrix[i][i] = radial + xi * x[i];
}
}
template<typename TParametersValueType, unsigned int NDimensions>
void
ElasticBodyReciprocalSplineKernelTransform<TParametersValueType, NDimensions>
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "m_Alpha: " << m_Alpha << std::endl;
}
} // namespace itk
#endif
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