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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Device/Resolution/ResolutionFunction2DGaussian.cpp
//! @brief Implements class ResolutionFunction2DGaussian.
//!
//! @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 "Device/Resolution/ResolutionFunction2DGaussian.h"
#include "Base/Math/Functions.h"
#include "Base/Util/Assert.h"
ResolutionFunction2DGaussian::ResolutionFunction2DGaussian(double sigma_x, double sigma_y)
: m_sigma_x(sigma_x)
, m_sigma_y(sigma_y)
{
validateOrThrow();
}
double ResolutionFunction2DGaussian::evaluateCDF(double x, double y) const
{
ASSERT(m_validated);
return Math::IntegratedGaussian(x, 0.0, m_sigma_x)
* Math::IntegratedGaussian(y, 0.0, m_sigma_y);
}
std::string ResolutionFunction2DGaussian::validate() const
{
std::vector<std::string> errs;
requestGe0(errs, m_sigma_x, "sigma_x");
requestGe0(errs, m_sigma_y, "sigma_y");
if (!errs.empty())
return jointError(errs);
m_validated = true;
return "";
}
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