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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Fit/Residual/ScalarFunctionAdapter.cpp
//! @brief Defines class ScalarFunctionAdapter.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Fit/Residual/ScalarFunctionAdapter.h"
#include "Fit/Residual/RootScalarFunction.h"
#include <utility>
using namespace mumufit;
ScalarFunctionAdapter::ScalarFunctionAdapter(const fcn_scalar_t& func, const Parameters& parameters)
: m_fcn(func)
, m_parameters(parameters)
{
}
const RootScalarFunction* ScalarFunctionAdapter::rootObjectiveFunction()
{
root_scalar_t rootfun = [&](const double* pars) {
std::vector<double> vec;
vec.resize(m_parameters.size(), 0.0);
std::copy(pars, pars + m_parameters.size(), vec.begin());
m_parameters.setValues(vec);
++m_number_of_calls;
return m_fcn(m_parameters);
};
m_root_objective =
std::make_unique<RootScalarFunction>(rootfun, static_cast<int>(m_parameters.size()));
return m_root_objective.get();
}
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