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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkPolyLineParametricPath.txx,v $
Language: C++
Date: $Date: 2006-02-06 22:01:58 $
Version: $Revision: 1.5 $
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 __itkPolyLineParametricPath_txx
#define __itkPolyLineParametricPath_txx
#include "itkPolyLineParametricPath.h"
#include <math.h>
namespace itk
{
template<unsigned int VDimension>
typename PolyLineParametricPath<VDimension>::OutputType
PolyLineParametricPath<VDimension>
::Evaluate( const InputType & input ) const
{
OutputType output;
PointType outputPoint;
VertexType vertex0;
VertexType vertex1;
double fractionOfLineSegment;
// Handle the endpoint carefully, since there is no following vertex
if( input >= InputType( m_VertexList->Size() - 1 ) )
{
return m_VertexList->ElementAt(m_VertexList->Size() - 1); // the last vertex
}
vertex0 = m_VertexList->ElementAt( int(input) );
vertex1 = m_VertexList->ElementAt( int(input+1.0) );
fractionOfLineSegment = input - int(input);
outputPoint = vertex0 + (vertex1-vertex0)*fractionOfLineSegment;
// For some stupid reason, there is no easy way to cast from a point to a
// continuous index.
for( unsigned int i=0; i<VDimension; i++ ) { output[i] = outputPoint[i]; }
return output;
}
//template<unsigned int VDimension>
//typename PolyLineParametricPath<VDimension>::VectorType
//PolyLineParametricPath<VDimension>
//::EvaluateDerivative(const InputType & input) const
//{
//}
/**
* Constructor
*/
template <unsigned int VDimension>
PolyLineParametricPath<VDimension>
::PolyLineParametricPath()
{
this->SetDefaultInputStepSize( 0.3 );
m_VertexList = VertexListType::New();
}
/**
* Standard "PrintSelf" method
*/
template <unsigned int VDimension>
void
PolyLineParametricPath<VDimension>
::PrintSelf( std::ostream& os, Indent indent) const
{
Superclass::PrintSelf( os, indent );
os << indent << "Verticies: " << m_VertexList << std::endl;
}
} // end namespace itk
#endif
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