ThermalNeutronBk2BkExpSigma.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2012 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/IFunction1D.h"
#include "MantidAPI/ParamFunction.h"
#include "MantidCurveFitting/DllConfig.h"
#include "MantidKernel/System.h"
 
namespace Mantid {
namespace CurveFitting {
namespace Functions {
 
class MANTID_CURVEFITTING_DLL ThermalNeutronBk2BkExpSigma : virtual public API::IFunction1D, public API::ParamFunction {
public:
  void function1D(double *out, const double *xValues, const size_t nData) const override;
 
  std::string name() const override { return "ThermalNeutronBk2BkExpSigma"; }
 
  const std::string category() const override { return "General"; }
 
protected:
  void init() override;
 
private:
  void functionDerivLocal(API::Jacobian *, const double *, const size_t);
 
  void functionDeriv(const API::FunctionDomain &domain, API::Jacobian &jacobian) override;
 
  inline double corefunction(double dh, double sig0sq, double sig1sq, double sig2sq) const;
};
 
using ThermalNeutronBk2BkExpSigma_sptr = std::shared_ptr<ThermalNeutronBk2BkExpSigma>;
 
} // namespace Functions
} // namespace CurveFitting
} // namespace Mantid