InelasticDiffSphere.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2007 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
 
#include "MantidAPI/MatrixWorkspace.h"
#include "MantidCurveFitting/Functions/DeltaFunction.h"
#include "MantidCurveFitting/Functions/FunctionQDepends.h"
 
namespace Mantid {
namespace CurveFitting {
namespace Functions {
struct xnlc {
  double x;
  size_t n;
  size_t l;
};
 
struct linearJ {
  double slope;
  double intercept;
};
 
class MANTID_CURVEFITTING_DLL InelasticDiffSphere : public FunctionQDepends {
public:
  InelasticDiffSphere();
 
  void init() override;
 
  std::string name() const override { return "InelasticDiffSphere"; }
 
  const std::string category() const override { return "QuasiElastic"; }
 
  std::vector<double> LorentzianCoefficients(double a) const;
 
protected:
  void function1D(double *out, const double *xValues, const size_t nData) const override;
 
private:
  void initXnlCoeff();
 
  void initAlphaCoeff();
 
  void initLinJlist();
 
  void setWorkspace(std::shared_ptr<const API::Workspace> ws) override;
 
  std::vector<xnlc> m_xnl;
 
  std::vector<double> m_alpha;
 
  size_t m_lmax;
 
  double m_divZone;
 
  double m_hbar;
 
  std::vector<linearJ> m_linearJlist;
 
  std::vector<double> m_qValueCache;
 
}; // end of class InelasticDiffSphere
 
} // namespace Functions
} // namespace CurveFitting
} // namespace Mantid