PeakParameterFunction.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 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 +
#include "MantidCurveFitting/Functions/PeakParameterFunction.h"
#include "MantidAPI/FunctionFactory.h"
#include "MantidAPI/IPeakFunction.h"
 
namespace Mantid::CurveFitting::Functions {
 
using namespace CurveFitting;
 
using namespace API;
 
DECLARE_FUNCTION(PeakParameterFunction)
 
 
void PeakParameterFunction::function1D(double *out, const double *xValues, const size_t nData) const {
  UNUSED_ARG(xValues);
  if (nData != 4) {
    throw std::invalid_argument("Can only work with domain of size 4.");
  }
 
  if (!m_peakFunction) {
    throw std::runtime_error("IPeakFunction has not been set.");
  }
 
  out[0] = m_peakFunction->centre();
  out[1] = m_peakFunction->height();
  out[2] = m_peakFunction->fwhm();
  out[3] = m_peakFunction->intensity();
}
 
void PeakParameterFunction::functionDeriv(const FunctionDomain &domain, Jacobian &jacobian) {
  calNumericalDeriv(domain, jacobian);
}
 
void PeakParameterFunction::beforeDecoratedFunctionSet(const IFunction_sptr &fn) {
  std::shared_ptr<IPeakFunction> peakFunction = std::dynamic_pointer_cast<IPeakFunction>(fn);
 
  if (!peakFunction) {
    throw std::invalid_argument("Decorated function needs to be an IPeakFunction.");
  }
 
  m_peakFunction = peakFunction;
}
 
} // namespace Mantid::CurveFitting::Functions