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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSpatialOrientationAdapter.cxx,v $
Language: C++
Date: $Date: 2007-12-24 16:46:28 $
Version: $Revision: 1.4 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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.
=========================================================================*/
#include "itkSpatialOrientationAdapter.h"
#include "itkImageBase.h"
namespace itk
{
SpatialOrientationAdapter::OrientationType
SpatialOrientationAdapter
::FromDirectionCosines(const DirectionType &Dir)
{
int axes[9] = {0,0,0,0,0,0,0,0,0};
unsigned dominant_axis;
dominant_axis = Function::Max3(Dir[0][0],Dir[1][0],Dir[2][0]);
axes[dominant_axis] = Function::Sign(Dir[dominant_axis][0]);
dominant_axis = Function::Max3(Dir[0][1],Dir[1][1],Dir[2][1]);
axes[dominant_axis+3] = Function::Sign(Dir[dominant_axis][1]);
dominant_axis = Function::Max3(Dir[0][2],Dir[1][2],Dir[2][2]);
axes[dominant_axis+6] = Function::Sign(Dir[dominant_axis][2]);
SpatialOrientation::CoordinateTerms terms[3] = {
SpatialOrientation::ITK_COORDINATE_UNKNOWN,
SpatialOrientation::ITK_COORDINATE_UNKNOWN,
SpatialOrientation::ITK_COORDINATE_UNKNOWN
};
for(unsigned i = 0; i < 3; i++)
{
if(int(axes[(i*3)]) == 1)
{
terms[i] = SpatialOrientation::ITK_COORDINATE_Right;
}
else if(axes[(i*3)] == -1)
{
terms[i] = SpatialOrientation::ITK_COORDINATE_Left;
}
else if(axes[(i*3)+1] == 1)
{
terms[i] = SpatialOrientation::ITK_COORDINATE_Anterior;
}
else if(axes[(i*3)+1] == -1)
{
terms[i] = SpatialOrientation::ITK_COORDINATE_Posterior;
}
else if(axes[(i*3)+2] == 1)
{
terms[i] = SpatialOrientation::ITK_COORDINATE_Inferior;
}
else if(axes[(i*3)+2] == -1)
{
terms[i] = SpatialOrientation::ITK_COORDINATE_Superior;
}
}
//
// all terms must be defined, otherwise just punt
if( terms[0] == SpatialOrientation::ITK_COORDINATE_UNKNOWN ||
terms[1] == SpatialOrientation::ITK_COORDINATE_UNKNOWN ||
terms[2] == SpatialOrientation::ITK_COORDINATE_UNKNOWN)
{
return SpatialOrientation::ITK_COORDINATE_ORIENTATION_RIP;
}
return static_cast<SpatialOrientation::ValidCoordinateOrientationFlags>
((terms[0] << SpatialOrientation::ITK_COORDINATE_PrimaryMinor) +
(terms[1] << SpatialOrientation::ITK_COORDINATE_SecondaryMinor) +
(terms[2] << SpatialOrientation::ITK_COORDINATE_TertiaryMinor));
}
SpatialOrientationAdapter::DirectionType
SpatialOrientationAdapter
::ToDirectionCosines(const OrientationType &Or)
{
typedef SpatialOrientation::CoordinateTerms CoordinateTerms;
CoordinateTerms terms[3];
terms[0] =
static_cast<CoordinateTerms>
((Or >> SpatialOrientation::ITK_COORDINATE_PrimaryMinor) & 0xff);
terms[1] =
static_cast<CoordinateTerms>
((Or >> SpatialOrientation::ITK_COORDINATE_SecondaryMinor) & 0xff);
terms[2] =
static_cast<CoordinateTerms>
((Or >> SpatialOrientation::ITK_COORDINATE_TertiaryMinor) & 0xff);
DirectionType direction;
direction.Fill(0.0);
for(unsigned int i = 0; i < DirectionType::ColumnDimensions; i++)
{
switch(terms[i])
{
case SpatialOrientation::ITK_COORDINATE_Right:
direction[0][i] = 1;
break;
case SpatialOrientation::ITK_COORDINATE_Left:
direction[0][i] = -1;
break;
case SpatialOrientation::ITK_COORDINATE_Anterior:
if ( DirectionType::RowDimensions > 1) direction[1][i] = 1;
break;
case SpatialOrientation::ITK_COORDINATE_Posterior:
if ( DirectionType::RowDimensions > 1) direction[1][i] = -1;
break;
case SpatialOrientation::ITK_COORDINATE_Inferior:
if ( DirectionType::RowDimensions > 2) direction[2][i] = 1;
break;
case SpatialOrientation::ITK_COORDINATE_Superior:
if ( DirectionType::RowDimensions > 2) direction[2][i] = -1;
break;
case SpatialOrientation::ITK_COORDINATE_UNKNOWN:
default:
//TODO: Should there be a default? Throw an exception?
break;
}
}
//TODO: Should check that directions are orthoganal.
return direction;
}
} // end namespace itk
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