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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkSpatialOrientationAdapter_h
#define itkSpatialOrientationAdapter_h
#include "itkImageBase.h"
#include "itkSpatialOrientation.h"
#include "itkConceptChecking.h"
namespace itk
{
//
// Helper functions, better than Macros
//
namespace Function
{
inline unsigned
Max3(double x, double y, double z)
{
constexpr double obliquityThresholdCosineValue = 0.001;
double absX = itk::Math::abs(x);
double absY = itk::Math::abs(y);
double absZ = itk::Math::abs(z);
if ((absX > obliquityThresholdCosineValue) && (absX > absY) && (absX > absZ))
{
return 0;
}
else if ((absY > obliquityThresholdCosineValue) && (absY > absX) && (absY > absZ))
{
return 1;
}
else if ((absZ > obliquityThresholdCosineValue) && (absZ > absX) && (absZ > absY))
{
return 2;
}
// they must all be equal, so just say x
return 0;
}
inline int
Sign(double x)
{
if (x < 0)
{
return -1;
}
return 1;
}
} // namespace Function
/** \class SpatialOrientationAdapter
* \brief Converts SpatialOrientationEnums to/from direction cosines.
* \ingroup ITKCommon
*/
class ITKCommon_EXPORT SpatialOrientationAdapter
{
public:
using Self = SpatialOrientationAdapter;
using OrientationType = SpatialOrientationEnums::ValidCoordinateOrientations;
using ImageType = ImageBase<3>;
/** Direction Cosines type alias. */
using DirectionType = typename ImageType::DirectionType;
/** Constructor */
SpatialOrientationAdapter() = default;
/** convert from direction cosines. */
OrientationType
FromDirectionCosines(const DirectionType & Dir);
/** convert to direction cosines. */
DirectionType
ToDirectionCosines(const OrientationType & Or);
};
} // namespace itk
#endif // itkSpatialOrientationAdapter_h
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