/usr/include/InsightToolkit/Review/itkCrossHelper.h is in libinsighttoolkit3-dev 3.20.1+git20120521-6build1.
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 | /*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkCrossHelper.h
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 __itkCrossHelper_h
#define __itkCrossHelper_h
#include "itkNumericTraits.h"
namespace itk
{
/** \class Cross
* \brief Compute the cross product of two vectors of dimension 3,
* independently of the type of the values of vector's elements.
*
* FIXME: Strictly speaking, the Cross product should not return a Vector, but
* a CovariantVector, since it behaves differently under Affine
* Transformations.
*
*/
template< typename TVector >
class CrossHelper
{
public:
typedef TVector VectorType;
typedef typename VectorType::ValueType ValueType;
itkStaticConstMacro ( Dimension, unsigned int, VectorType::Dimension );
/**
* \param[in] iU
* \param[in] iV
* \return \f$ \boldsymbol{iU} \cdot \boldsymbol{iV} \f$
*/
VectorType operator ( ) ( const VectorType& iU,
const VectorType& iV ) const
{
VectorType oCross;
if( Dimension > 2 )
{
oCross[0] = iU[1] * iV[2] - iV[1] * iU[2];
oCross[1] = iV[0] * iU[2] - iU[0] * iV[2];
oCross[2] = iU[0] * iV[1] - iV[0] * iU[1];
for( unsigned int dim = 3; dim < Dimension; dim++ )
{
oCross[dim] = 0.0;
}
}
else
{
oCross.Fill( 0. );
}
return oCross;
}
};
}
#endif
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