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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 itkScalableAffineTransform_hxx
#define itkScalableAffineTransform_hxx
#include "itkMath.h"
#include "itkNumericTraits.h"
#include "vnl/algo/vnl_matrix_inverse.h"
namespace itk
{
template <typename TParametersValueType, unsigned int VDimension>
ScalableAffineTransform<TParametersValueType, VDimension>::ScalableAffineTransform()
: Superclass(Self::ParametersDimension)
{
for (unsigned int i = 0; i < VDimension; ++i)
{
m_Scale[i] = 1;
m_MatrixScale[i] = 1;
}
}
template <typename TParametersValueType, unsigned int VDimension>
ScalableAffineTransform<TParametersValueType, VDimension>::ScalableAffineTransform(unsigned int,
unsigned int parametersDimension)
: Superclass(parametersDimension)
{
for (unsigned int i = 0; i < VDimension; ++i)
{
m_Scale[i] = 1;
m_MatrixScale[i] = 1;
}
}
template <typename TParametersValueType, unsigned int VDimension>
ScalableAffineTransform<TParametersValueType, VDimension>::ScalableAffineTransform(unsigned int parametersDimension)
: Superclass(parametersDimension)
{
for (unsigned int i = 0; i < VDimension; ++i)
{
m_Scale[i] = 1;
m_MatrixScale[i] = 1;
}
}
template <typename TParametersValueType, unsigned int VDimension>
ScalableAffineTransform<TParametersValueType, VDimension>::ScalableAffineTransform(const MatrixType & matrix,
const OutputVectorType & offset)
: Superclass(matrix, offset)
{
for (unsigned int i = 0; i < VDimension; ++i)
{
m_Scale[i] = 1;
m_MatrixScale[i] = 1;
}
}
template <typename TParametersValueType, unsigned int VDimension>
void
ScalableAffineTransform<TParametersValueType, VDimension>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
unsigned int i;
os << indent << "Scale : ";
for (i = 0; i < VDimension; ++i)
{
os << m_Scale[i] << ' ';
}
os << std::endl;
os << indent << "MatrixScale : ";
for (i = 0; i < VDimension; ++i)
{
os << m_MatrixScale[i] << ' ';
}
os << std::endl;
}
template <typename TParametersValueType, unsigned int VDimension>
void
ScalableAffineTransform<TParametersValueType, VDimension>::SetIdentity()
{
for (unsigned int i = 0; i < VDimension; ++i)
{
m_Scale[i] = 1;
m_MatrixScale[i] = 1;
}
this->Superclass::SetIdentity();
}
template <typename TParametersValueType, unsigned int VDimension>
void
ScalableAffineTransform<TParametersValueType, VDimension>::SetScale(const InputVectorType & scale)
{
unsigned int i;
for (i = 0; i < VDimension; ++i)
{
m_Scale[i] = scale[i];
}
this->ComputeMatrix();
this->Modified();
}
template <typename TParametersValueType, unsigned int VDimension>
void
ScalableAffineTransform<TParametersValueType, VDimension>::SetScale(const double scale[VDimension])
{
unsigned int i;
for (i = 0; i < VDimension; ++i)
{
m_Scale[i] = scale[i];
}
this->ComputeMatrix();
this->Modified();
}
template <typename TParametersValueType, unsigned int VDimension>
bool
ScalableAffineTransform<TParametersValueType, VDimension>::GetInverse(Self * inverse) const
{
return this->Superclass::GetInverse(inverse);
}
template <typename TParametersValueType, unsigned int VDimension>
auto
ScalableAffineTransform<TParametersValueType, VDimension>::GetInverseTransform() const -> InverseTransformBasePointer
{
return Superclass::InvertTransform(*this);
}
template <typename TParametersValueType, unsigned int VDimension>
void
ScalableAffineTransform<TParametersValueType, VDimension>::ComputeMatrix()
{
bool scaleChanged = false;
for (unsigned int i = 0; i < VDimension; ++i)
{
if (Math::NotExactlyEquals(m_Scale[i], m_MatrixScale[i]))
{
scaleChanged = true;
}
}
if (scaleChanged)
{
MatrixType mat;
typename MatrixType::InternalMatrixType & imat = mat.GetVnlMatrix();
for (unsigned int i = 0; i < VDimension; ++i)
{
if (Math::NotAlmostEquals(m_MatrixScale[i], typename NumericTraits<InputVectorType>::ValueType{}) &&
Math::NotAlmostEquals(m_Scale[i], 0.0))
{
imat.put(i, i, m_Scale[i] / m_MatrixScale[i] * this->GetMatrix()[i][i]);
m_MatrixScale[i] = m_Scale[i];
}
else
{
m_Scale[i] = 1;
m_MatrixScale[i] = 1;
imat.put(i, i, this->GetMatrix()[i][i]);
}
}
Superclass::SetVarMatrix(mat);
}
}
} // namespace itk
#endif
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