/usr/include/InsightToolkit/Common/itkParametricPath.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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | /*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkParametricPath.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 __itkParametricPath_txx
#define __itkParametricPath_txx
#include "itkParametricPath.h"
namespace itk
{
/**
* Constructor
*/
template <unsigned int VDimension>
ParametricPath<VDimension>
::ParametricPath()
{
m_DefaultInputStepSize = 0.3;
}
template<unsigned int VDimension>
typename ParametricPath<VDimension>::IndexType
ParametricPath<VDimension>
::EvaluateToIndex( const InputType & input ) const
{
ContinuousIndexType continuousIndex;
IndexType index;
continuousIndex = this->Evaluate( input );
// Round each coordinate to the nearest integer value
for( unsigned int i=0; i<VDimension; i++ )
{
index[i] = (typename IndexType::IndexValueType)( continuousIndex[i] + 0.5 );
}
return index;
}
template<unsigned int VDimension>
typename ParametricPath<VDimension>::OffsetType
ParametricPath<VDimension>
::IncrementInput(InputType & input) const
{
int iterationCount;
bool tooSmall;
bool tooBig;
InputType inputStepSize;
InputType finalInputValue;
OffsetType offset;
IndexType currentImageIndex;
IndexType nextImageIndex;
IndexType finalImageIndex;
iterationCount = 0;
inputStepSize = m_DefaultInputStepSize;
// Are we already at (or past) the end of the input?
finalInputValue = this->EndOfInput();
currentImageIndex = this->EvaluateToIndex( input );
finalImageIndex = this->EvaluateToIndex( finalInputValue );
offset = finalImageIndex - currentImageIndex;
if( ( offset == this->GetZeroOffset() && input != this->StartOfInput() ) ||
( input >=finalInputValue ) )
{
return this->GetZeroOffset();
}
do
{
if( iterationCount++ > 10000 ) {itkExceptionMacro(<<"Too many iterations");}
nextImageIndex = this->EvaluateToIndex( input + inputStepSize );
offset = nextImageIndex - currentImageIndex;
tooBig = false;
tooSmall = ( offset == this->GetZeroOffset() );
if( tooSmall )
{
// double the input step size, but don't go past the end of the input
inputStepSize *= 2;
if( (input + inputStepSize) >= finalInputValue )
{
inputStepSize = finalInputValue - input;
}
}
else
{
// Search for an offset dimension that is too big
for( unsigned int i=0; i<VDimension && !tooBig; i++ )
{
tooBig = ( offset[i] >= 2 || offset[i] <= -2 );
}
if( tooBig )
{
inputStepSize /= 1.5;
}
}
}
while( tooSmall || tooBig );
input += inputStepSize;
return offset;
}
template<unsigned int VDimension>
typename ParametricPath<VDimension>::VectorType
ParametricPath<VDimension>
::EvaluateDerivative(const InputType & input) const
{
InputType inputStepSize;
inputStepSize = m_DefaultInputStepSize;
if( (input + inputStepSize) >= this->EndOfInput() )
{
inputStepSize = this->EndOfInput() - input;
}
return ( this->Evaluate(input + inputStepSize) - this->Evaluate(input) ) / inputStepSize;
}
template<unsigned int VDimension>
void
ParametricPath<VDimension>
::PrintSelf (std::ostream &os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "DefaultInputSize: " << m_DefaultInputStepSize << std::endl;
}
} // end namespaceitk
#endif
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