/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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
 *
 *         http://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 __itkCustomVersorTransformInitializer_hxx
#define __itkCustomVersorTransformInitializer_hxx

#include "itkCustomVersorTransformInitializer.h"

namespace itk
{

template< class TPointSet, class TMovingImage >
CustomVersorTransformInitializer< TPointSet, TMovingImage >
::CustomVersorTransformInitializer()
{
}

template< class TPointSet, class TMovingImage >
void
CustomVersorTransformInitializer< TPointSet, TMovingImage >
::InitializeTransform()
{
  // Compute moments and initialize center of rotaion and translation
  this->Superclass::InitializeTransform();

  typedef typename Superclass::PointSetCalculatorType::MatrixType  FixedMatrixType;
  typedef typename Superclass::MovingImageCalculatorType::MatrixType MovingMatrixType;

  FixedMatrixType  fixedPrincipalAxis  = this->GetFixedCalculator()->GetPrincipalAxes();
  MovingMatrixType movingPrincipalAxis = this->GetMovingCalculator()->GetPrincipalAxes();

  MovingMatrixType rotationMatrix = movingPrincipalAxis * fixedPrincipalAxis.GetInverse();

  this->GetTransform()->SetMatrix(rotationMatrix);
}

template< class TPointSet, class TMovingImage >
void
CustomVersorTransformInitializer< TPointSet, TMovingImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
  this->Superclass::PrintSelf(os, indent);
}
}  // namespace itk

#endif /* __itkCustomVersorTransformInitializer_hxx */