/usr/include/ITK-4.5/itkEllipsoidInteriorExteriorSpatialFunction.hxx is in libinsighttoolkit4-dev 4.5.0-3.
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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 __itkEllipsoidInteriorExteriorSpatialFunction_hxx
#define __itkEllipsoidInteriorExteriorSpatialFunction_hxx
#include "itkEllipsoidInteriorExteriorSpatialFunction.h"
#include <cmath>
namespace itk
{
template< unsigned int VDimension, typename TInput >
EllipsoidInteriorExteriorSpatialFunction< VDimension, TInput >
::EllipsoidInteriorExteriorSpatialFunction()
{
m_Orientations = NULL;
m_Axes.Fill(1.0f); // Lengths of ellipsoid axes.
m_Center.Fill(0.0f); // Origin of ellipsoid
}
template< unsigned int VDimension, typename TInput >
EllipsoidInteriorExteriorSpatialFunction< VDimension, TInput >
::~EllipsoidInteriorExteriorSpatialFunction()
{
unsigned int i;
if ( m_Orientations )
{
for ( i = 0; i < VDimension; i++ )
{
delete[] m_Orientations[i];
}
delete[] m_Orientations;
}
}
template< unsigned int VDimension, typename TInput >
typename EllipsoidInteriorExteriorSpatialFunction< VDimension, TInput >::OutputType
EllipsoidInteriorExteriorSpatialFunction< VDimension, TInput >
::Evaluate(const InputType & position) const
{
double distanceSquared = 0;
Vector< double, VDimension > orientationVector;
Vector< double, VDimension > pointVector;
// Project the position onto each of the axes, normalize by axis length,
// and determine whether position is inside ellipsoid. The length of axis0,
// m_Axis[0] is orientated in the direction of m_Orientations[0].
for ( unsigned int i = 0; i < VDimension; i++ )
{
pointVector[i] = position[i] - m_Center[i];
}
for ( unsigned int i = 0; i < VDimension; i++ )
{
for ( unsigned int j = 0; j < VDimension; j++ )
{
orientationVector[j] = m_Orientations[i][j];
}
distanceSquared += vcl_pow( static_cast< double >( ( orientationVector * pointVector ) / ( .5 * m_Axes[i] ) ),
static_cast< double >( 2 ) );
}
if ( distanceSquared <= 1 )
{
return 1; // Inside the ellipsoid.
}
//Default return value assumes outside the ellipsoid
return 0; // Outside the ellipsoid.
}
template< unsigned int VDimension, typename TInput >
void EllipsoidInteriorExteriorSpatialFunction< VDimension, TInput >
::SetOrientations(const OrientationType & orientations)
{
unsigned int i, j;
// Initialize orientation vectors.
if ( m_Orientations )
{
for ( i = 0; i < VDimension; i++ )
{
delete[] m_Orientations[i];
}
delete[] m_Orientations;
}
m_Orientations = new double *[VDimension];
for ( i = 0; i < VDimension; i++ )
{
m_Orientations[i] = new double[VDimension];
}
// Set orientation vectors (must be orthogonal).
for ( i = 0; i < VDimension; i++ )
{
for ( j = 0; j < VDimension; j++ )
{
m_Orientations[i][j] = orientations[i][j];
}
}
}
template< unsigned int VDimension, typename TInput >
void EllipsoidInteriorExteriorSpatialFunction< VDimension, TInput >
::PrintSelf(std::ostream & os, Indent indent) const
{
unsigned int i, j;
Superclass::PrintSelf(os, indent);
os << indent << "Lengths of Ellipsoid Axes: " << m_Axes << std::endl;
os << indent << "Origin of Ellipsoid: " << m_Center << std::endl;
if ( m_Orientations )
{
os << indent << "Orientations: " << std::endl;
for ( i = 0; i < VDimension; i++ )
{
for ( j = 0; j < VDimension; j++ )
{
os << indent << indent << m_Orientations[i][j] << " ";
}
os << std::endl;
}
}
}
} // end namespace itk
#endif
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