/usr/include/ITK-4.5/itkFiniteCylinderSpatialFunction.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.
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*
*=========================================================================*/
#ifndef __itkFiniteCylinderSpatialFunction_hxx
#define __itkFiniteCylinderSpatialFunction_hxx
#include "itkFiniteCylinderSpatialFunction.h"
#include <cmath>
namespace itk
{
template< unsigned int VDimension, typename TInput >
FiniteCylinderSpatialFunction< VDimension, TInput >
::FiniteCylinderSpatialFunction()
{
// a normalized {1,1,...1} vector is
// { 1.0 / sqrt( VDmim ), ... }
const double orientationVal = 1.0 / vcl_sqrt(static_cast<double>(VDimension));
m_Orientation.Fill(orientationVal);
m_NormalizedOrientation.Fill(orientationVal);
m_AxisLength = 1.0f; // Length of cylinder axis.
m_Radius = 1.0f; // Radius of cylinder.
m_Center.Fill(0.0f); // Origin of cylinder}
}
template< unsigned int VDimension, typename TInput >
FiniteCylinderSpatialFunction< VDimension, TInput >
::~FiniteCylinderSpatialFunction()
{}
template< unsigned int VDimension, typename TInput >
void
FiniteCylinderSpatialFunction< VDimension, TInput >
::SetOrientation(const InputType _Orientation)
{
itkDebugMacro("setting Orientation to " << _Orientation);
if(this->m_Orientation != _Orientation)
{
this->m_Orientation = _Orientation;
//
// save normalizedOrientation, so it doesn't need to be recomputed
// in every call of Evaluate.
double norm = 0.0;
for(unsigned int i = 0; i < VDimension; ++i)
{
norm += this->m_Orientation[i] * this->m_Orientation[i];
}
norm = vcl_sqrt(norm);
if(norm == 0.0) // avoid divide by zero
{
itkExceptionMacro(<< "Degenerate orientation vector " << this->m_Orientation);
}
for(unsigned int i = 0; i < VDimension; ++i)
{
this->m_NormalizedOrientation[i] = this->m_Orientation[i] / norm;
}
this->Modified();
}
}
template< unsigned int VDimension, typename TInput >
typename FiniteCylinderSpatialFunction< VDimension, TInput >::OutputType
FiniteCylinderSpatialFunction< VDimension, TInput >
::Evaluate(const InputType & position) const
{
const double halfAxisLength = 0.5 * m_AxisLength;
Vector< double, VDimension > orientationVector;
Vector< double, VDimension > pointVector;
Vector< double, VDimension > medialAxisVector;
for(unsigned int i = 0; i < VDimension; ++i)
{
pointVector[i] = position[i] - m_Center[i];
}
for(unsigned int i = 0; i < VDimension; ++i)
{
medialAxisVector[i] = m_NormalizedOrientation[i];
}
//if length_test is less than the length of the cylinder (half actually,
// because its length from the center), than
//the point is within the length of the cylinder along the medial axis
const double distanceFromCenter = dot_product( medialAxisVector.GetVnlVector(), pointVector.GetVnlVector() );
if ( vcl_fabs(distanceFromCenter) <= ( halfAxisLength )
&& m_Radius >= vcl_sqrt( vcl_pow(pointVector.GetVnlVector().magnitude(), 2.0) - vcl_pow(distanceFromCenter, 2.0) ) )
{
return 1;
}
else { return 0; }
}
template< unsigned int VDimension, typename TInput >
void FiniteCylinderSpatialFunction< VDimension, TInput >
::PrintSelf(std::ostream & os, Indent indent) const
{
unsigned int i;
Superclass::PrintSelf(os, indent);
os << indent << "Lengths of Axis: " << m_AxisLength << std::endl;
os << indent << "Radius: " << m_Radius << std::endl;
os << indent << "Origin of Cylinder: " << m_Center << std::endl;
os << indent << "Orientation: " << std::endl;
for ( i = 0; i < VDimension; i++ )
{
os << indent << indent << m_Orientation[i] << " ";
}
os << std::endl;
os << indent << "Normalized Orientation: " << std::endl;
for ( i = 0; i < VDimension; i++ )
{
os << indent << indent << m_NormalizedOrientation[i] << " ";
}
os << std::endl;
}
} // end namespace itk
#endif
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