SphericalAbsorption.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2010 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
//----------------------------------------------------------------------
// Includes
//----------------------------------------------------------------------
#include "MantidAPI/Algorithm.h"
#include "MantidAlgorithms/DllConfig.h"
#include "MantidGeometry/IDetector.h"
 
namespace Mantid {
 
// forward declaration from other Mantid modules
namespace API {
class Sample;
}
 
namespace Kernel {
class V3D;
}
 
namespace Geometry {
class IObject;
}
 
namespace Algorithms {
class MANTID_ALGORITHMS_DLL SphericalAbsorption final : public API::Algorithm {
public:
  SphericalAbsorption();
  const std::string category() const override { return "CorrectionFunctions\\AbsorptionCorrections"; }
  const std::string name() const override { return "SphericalAbsorption"; }
  const std::string summary() const override {
    return "Calculates bin-by-bin or event correction factors for attenuation "
           "due to absorption and scattering in a 'spherical' sample.";
  }
 
  int version() const override { return (1); }
  const std::vector<std::string> seeAlso() const override { return {"AbsorptionCorrection"}; }
 
protected:
  API::MatrixWorkspace_sptr m_inputWS;         
  const Geometry::IObject *m_sampleObject;     
  Kernel::V3D m_beamDirection;                 
  std::vector<double> m_L1s,                   
      m_elementVolumes;                        
  std::vector<Kernel::V3D> m_elementPositions; 
  size_t m_numVolumeElements;                  
  double m_sampleVolume;                       
 
private:
  void init() override;
  void exec() override;
 
  void retrieveBaseProperties();
  void constructSample(API::Sample &sample);
  void calculateDistances(const Geometry::IDetector_const_sptr &detector, std::vector<double> &L2s) const;
  inline double doIntegration(const double &lambda, const std::vector<double> &L2s) const;
  inline double doIntegration(const double &lambda_i, const double &lambda_f, const std::vector<double> &L2s) const;
 
  double m_refAtten;   
  double m_scattering; 
  int64_t n_lambda;    
  int64_t x_step;       
  int64_t m_emode;      
  double m_lambdaFixed; 
};
 
} // namespace Algorithms
} // namespace Mantid