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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.
*
*=========================================================================*/
#ifndef itkAzimuthElevationToCartesianTransform_hxx
#define itkAzimuthElevationToCartesianTransform_hxx
namespace itk
{
template <typename TParametersValueType, unsigned int VDimension>
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::AzimuthElevationToCartesianTransform()
// add this construction call when deriving from itk::Transform
// :Superclass(ParametersDimension)
{
m_MaxAzimuth = 0;
m_MaxElevation = 0;
m_RadiusSampleSize = 1;
m_AzimuthAngularSeparation = 1;
m_ElevationAngularSeparation = 1;
m_FirstSampleDistance = 0;
m_ForwardAzimuthElevationToPhysical = true;
}
template <typename TParametersValueType, unsigned int VDimension>
void
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::PrintSelf(std::ostream & os,
Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "MaxAzimuth: " << m_MaxAzimuth << std::endl;
os << indent << "MaxElevation: " << m_MaxElevation << std::endl;
os << indent << "RadiusSampleSize: " << m_RadiusSampleSize << std::endl;
os << indent << "AzimuthAngularSeparation: " << m_AzimuthAngularSeparation << std::endl;
os << indent << "ElevationAngularSeparation: " << m_ElevationAngularSeparation << std::endl;
os << indent << "FirstSampleDistance: " << m_FirstSampleDistance << std::endl;
os << indent << "ForwardAzimuthElevationToPhysical: " << (m_ForwardAzimuthElevationToPhysical ? "On" : "Off")
<< std::endl;
}
template <typename TParametersValueType, unsigned int VDimension>
auto
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::TransformPoint(
const InputPointType & point) const -> OutputPointType
{
OutputPointType result;
if (m_ForwardAzimuthElevationToPhysical)
{
result = TransformAzElToCartesian(point);
}
else
{
result = TransformCartesianToAzEl(point);
}
return result;
}
template <typename TParametersValueType, unsigned int VDimension>
auto
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::TransformAzElToCartesian(
const InputPointType & point) const -> OutputPointType
{
OutputPointType result;
ScalarType Azimuth =
((2 * itk::Math::pi) / 360) * (point[0] * m_AzimuthAngularSeparation - ((m_MaxAzimuth - 1) / 2.0));
ScalarType Elevation =
((2 * itk::Math::pi) / 360) * (point[1] * m_ElevationAngularSeparation - ((m_MaxElevation - 1) / 2.0));
ScalarType r = (m_FirstSampleDistance + point[2]) * m_RadiusSampleSize;
ScalarType cosOfAzimuth = std::cos(Azimuth);
ScalarType tanOfElevation = std::tan(Elevation);
result[2] = (r * cosOfAzimuth) / std::sqrt((1 + cosOfAzimuth * cosOfAzimuth * tanOfElevation * tanOfElevation));
result[0] = result[2] * std::tan(Azimuth);
result[1] = result[2] * tanOfElevation;
return result;
}
template <typename TParametersValueType, unsigned int VDimension>
auto
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::TransformCartesianToAzEl(
const OutputPointType & point) const -> OutputPointType
{
InputPointType result; // Converted point
result[0] = std::atan2(point[0], point[2]) * (360 / (2 * itk::Math::pi)) + ((m_MaxAzimuth - 1) / 2.0);
result[1] = std::atan2(point[1], point[2]) * (360 / (2 * itk::Math::pi)) + ((m_MaxElevation - 1) / 2.0);
result[2] = ((std::sqrt(point[0] * point[0] + point[1] * point[1] + point[2] * point[2]) / m_RadiusSampleSize) -
m_FirstSampleDistance);
return result;
}
template <typename TParametersValueType, unsigned int VDimension>
void
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::SetAzimuthElevationToCartesianParameters(
const double sampleSize,
const double firstSampleDistance,
const long maxAzimuth,
const long maxElevation,
const double azimuthAngleSeparation,
const double elevationAngleSeparation)
{
SetMaxAzimuth(static_cast<long>(static_cast<double>(maxAzimuth) * azimuthAngleSeparation));
SetMaxElevation(static_cast<long>(static_cast<double>(maxElevation) * elevationAngleSeparation));
SetRadiusSampleSize(sampleSize);
SetAzimuthAngularSeparation(azimuthAngleSeparation);
SetElevationAngularSeparation(elevationAngleSeparation);
SetFirstSampleDistance(firstSampleDistance / sampleSize);
}
template <typename TParametersValueType, unsigned int VDimension>
void
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::SetAzimuthElevationToCartesianParameters(
const double sampleSize,
const double firstSampleDistance,
const long maxAzimuth,
const long maxElevation)
{
SetAzimuthElevationToCartesianParameters(sampleSize, firstSampleDistance, maxAzimuth, maxElevation, 1.0, 1.0);
}
template <typename TParametersValueType, unsigned int VDimension>
void
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::SetForwardAzimuthElevationToCartesian()
{
m_ForwardAzimuthElevationToPhysical = true;
}
template <typename TParametersValueType, unsigned int VDimension>
void
AzimuthElevationToCartesianTransform<TParametersValueType, VDimension>::SetForwardCartesianToAzimuthElevation()
{
m_ForwardAzimuthElevationToPhysical = false;
}
} // namespace itk
#endif
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