itkPSMImageDomain.h

/*=========================================================================
 *
 *  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 __itkPSMImageDomain_h
#define __itkPSMImageDomain_h

#include "itkImage.h"
#include "itkPSMRegionDomain.h"
#include "itkLinearInterpolateImageFunction.h"

namespace itk
{
template <class T, unsigned int VDimension>
class ITK_EXPORT PSMImageDomain : public PSMRegionDomain<VDimension>
{
public:
  typedef PSMImageDomain Self;
  typedef PSMRegionDomain<VDimension> Superclass;
  typedef SmartPointer<Self>  Pointer;
  typedef SmartPointer<const Self> ConstPointer;
  typedef WeakPointer<const Self>  ConstWeakPointer;

  typedef Image<T, VDimension> ImageType;

  itkNewMacro(Self);

  itkTypeMacro(PSMImageDomain, PSMRegionDomain);

  typedef typename Superclass::PointType PointType;

  typedef LinearInterpolateImageFunction<ImageType, typename PointType::CoordRepType>
  ScalarInterpolatorType;



  itkStaticConstMacro(Dimension, unsigned int, VDimension);

  void SetImage(ImageType *I)
  {
    this->Modified();
    m_Image= I;

    // Set up the scalar image and interpolation.
    m_ScalarInterpolator->SetInputImage(m_Image);

    // Grab the upper-left and lower-right corners of the bounding box.  Points
    // are always in physical coordinates, not image index coordinates.
    typename ImageType::RegionType::IndexType idx
      = m_Image->GetRequestedRegion().GetIndex(); // upper lh corner
    typename ImageType::RegionType::SizeType sz
      = m_Image->GetRequestedRegion().GetSize();  // upper lh corner

    typename ImageType::PointType l0;
    m_Image->TransformIndexToPhysicalPoint(idx, l0);
    typename ImageType::PointType u0;
    m_Image->TransformIndexToPhysicalPoint(idx + sz, u0);

    // Cast points to higher precision if needed.  Parent class uses doubles
    // because they are compared directly with points in the particle system,
    // which are always double precision.
    typename Superclass::PointType l;
    typename Superclass::PointType u;
    
    for (unsigned int i = 0; i < VDimension; i++)
      {
      l[i] = static_cast<double>(l0[i]);
      u[i] = static_cast<double>(u0[i]);
      }
    
    this->SetLowerBound(l);
    this->SetUpperBound(u);
  }
  itkGetObjectMacro(Image, ImageType);
  itkGetConstObjectMacro(Image, ImageType);

  inline T Sample(const PointType &p) const
  {   return  m_ScalarInterpolator->Evaluate(p);  }

  inline bool IsInsideBuffer(const PointType &p) const
  { return m_ScalarInterpolator->IsInsideBuffer(p); }

  itkGetObjectMacro(ScalarInterpolator, ScalarInterpolatorType);
  
protected:
  PSMImageDomain()
  {
    m_ScalarInterpolator = ScalarInterpolatorType::New();
  }

  void PrintSelf(std::ostream& os, Indent indent) const
  {
    Superclass::PrintSelf(os, indent);
    
    os << indent << "m_Image = " << m_Image << std::endl;
    os << indent << "m_ScalarInterpolator = " << m_ScalarInterpolator << std::endl;
  }
  virtual ~PSMImageDomain() {};
  
private:
  PSMImageDomain(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  typename ImageType::Pointer m_Image;
  typename ScalarInterpolatorType::Pointer m_ScalarInterpolator;
};

} // end namespace itk

#endif