/usr/include/InsightToolkit/Common/itkElasticBodySplineKernelTransform.txx is in libinsighttoolkit3-dev 3.20.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Program: Insight Segmentation & Registration Toolkit
Module: itkElasticBodySplineKernelTransform.txx
Language: C++
Date: $Date$
Version: $Revision$
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 __itkElasticBodySplineKernelTransform_txx
#define __itkElasticBodySplineKernelTransform_txx
#include "itkElasticBodySplineKernelTransform.h"
namespace itk
{
template <class TScalarType, unsigned int NDimensions>
ElasticBodySplineKernelTransform<TScalarType, NDimensions>::
ElasticBodySplineKernelTransform()
{
// Alpha = 12 ( 1 - \nu ) - 1
m_Alpha = 12.0 * ( 1.0 - .25 ) - 1;
}
template <class TScalarType, unsigned int NDimensions>
ElasticBodySplineKernelTransform<TScalarType, NDimensions>::
~ElasticBodySplineKernelTransform()
{
}
/**
* This method has been deprecated as of ITK 3.6.
* Please use the method: void ComputeG(vector,gmatrix) instead.
*/
#if !defined(ITK_LEGACY_REMOVE)
template <class TScalarType, unsigned int NDimensions>
const typename ElasticBodySplineKernelTransform<TScalarType, NDimensions>::GMatrixType &
ElasticBodySplineKernelTransform<TScalarType, NDimensions>::
ComputeG( const InputVectorType & ) const
{
itkLegacyReplaceBodyMacro(itkElasticBodySplineKernelTransform::ComputeG_vector,
3.6,itkElasticBodySplineKernelTransform::ComputeG_vector_gmatrix);
return this->m_GMatrix;
}
#endif
template <class TScalarType, unsigned int NDimensions>
void
ElasticBodySplineKernelTransform<TScalarType, NDimensions>
::ComputeG(const InputVectorType & x, GMatrixType & gmatrix) const
{
const TScalarType r = x.GetNorm();
const TScalarType factor = -3.0 * r;
const TScalarType radial = m_Alpha * ( r * r ) * 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 TScalarType value = xi * x[j];
gmatrix[i][j] = value;
gmatrix[j][i] = value;
}
gmatrix[i][i] = radial + xi * x[i];
}
}
template <class TScalarType, unsigned int NDimensions>
void
ElasticBodySplineKernelTransform<TScalarType, 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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