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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSphereSpatialFunction.txx,v $
Language: C++
Date: $Date: 2003-09-10 14:29:26 $
Version: $Revision: 1.14 $
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 __itkSphereSpatialFunction_txx
#define __itkSphereSpatialFunction_txx
#include "itkSphereSpatialFunction.h"
namespace itk
{
template <unsigned int VImageDimension,typename TInput>
SphereSpatialFunction<VImageDimension,TInput>
::SphereSpatialFunction()
{
m_Radius = 1.0;
m_Center.Fill(0.0);
}
template <unsigned int VImageDimension,typename TInput>
SphereSpatialFunction<VImageDimension,TInput>
::~SphereSpatialFunction()
{
}
template <unsigned int VImageDimension,typename TInput>
typename SphereSpatialFunction<VImageDimension,TInput>::OutputType
SphereSpatialFunction<VImageDimension,TInput>
::Evaluate(const InputType& position) const
{
double acc = 0;
for(unsigned int i = 0; i < VImageDimension; i++)
{
acc += (position[i] - m_Center[i]) * (position[i] - m_Center[i]);
}
acc -= m_Radius*m_Radius;
if(acc <= 0) // inside the sphere
{
return 1;
}
else
{
return 0; // outside the sphere
}
}
template <unsigned int VImageDimension,typename TInput>
void
SphereSpatialFunction<VImageDimension,TInput>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
unsigned int i;
os << indent << "Center: [";
for (i=0; i < VImageDimension - 1; i++)
{
os << m_Center[i] << ", ";
}
os << "]" << std::endl;
os << indent << "Radius: " << m_Radius << std::endl;
}
} // end namespace itk
#endif
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