ProjMatrixByBinUsingSolidAngle.h

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

#include "stir/RegisteredParsingObject.h"
#include "stir/recon_buildblock/ProjMatrixByBin.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 ProjMatrixByBinUsingSolidAngle
    : public RegisteredParsingObject<ProjMatrixByBinUsingSolidAngle, ProjMatrixByBin, ProjMatrixByBin>
{
public:
  static const char* const registered_name;

  ProjMatrixByBinUsingSolidAngle();


  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;

private:
  // explicitly list necessary members for image details (should use an Info object instead)
  // ideally these should be const, but I have some trouble initialising them in that case
  CartesianCoordinate3D<float> voxel_size;
  CartesianCoordinate3D<float> origin;
  CartesianCoordinate3D<int> min_index;
  CartesianCoordinate3D<int> max_index;

  shared_ptr<const ProjDataInfo> proj_data_info_ptr;

  void calculate_proj_matrix_elems_for_one_bin(ProjMatrixElemsForOneBin&) const override;

  void set_defaults() override;
  void initialise_keymap() override;
};

END_NAMESPACE_STIR

#endif