ProjMatrixByDenselOnCartesianGridUsingElement.h

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//
//
/*
    Copyright (C) 2000- 2002, IRSL
    See STIR/LICENSE.txt for details
*/
#ifndef __ProjMatrixByDenselOnCartesianGridUsingElement__
#define __ProjMatrixByDenselOnCartesianGridUsingElement__

#include "stir_experimental/recon_buildblock/ProjMatrixByDensel.h"
#include "stir/ProjDataInfo.h"
#include "stir/CartesianCoordinate3D.h"
#include "stir/shared_ptr.h"

START_NAMESPACE_STIR

template <int num_dimensions, typename elemT>
class DiscretisedDensity;

class ProjMatrixByDenselOnCartesianGridUsingElement : public ProjMatrixByDensel
{
public:

  void set_up(const shared_ptr<const ProjDataInfo>& proj_data_info_ptr,
              const shared_ptr<const DiscretisedDensity<3, float>>& density_info_ptr // TODO should be Info only
              ) override;


  virtual float get_element(const Bin& bin, const CartesianCoordinate3D<float>& densel_ctr) const = 0;

protected:
  shared_ptr<const ProjDataInfo> proj_data_info_ptr;

  // explicitly list necessary members for image details (should use an Info object instead)
  CartesianCoordinate3D<float> grid_spacing;
  CartesianCoordinate3D<float> origin;
  float min_z_index;
  float max_z_index;


  void calculate_proj_matrix_elems_for_one_densel(ProjMatrixElemsForOneDensel&) const override;
};

END_NAMESPACE_STIR

#endif