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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sim/Scan/PhysicalScan.cpp
//! @brief Implements interface PhysicalScan.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2023
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Sim/Scan/PhysicalScan.h"
#include "Base/Axis/Scale.h"
#include "Base/Math/Numeric.h"
#include "Device/Beam/Beam.h"
#include "Device/Beam/IFootprint.h"
#include "Device/Pol/PolFilter.h"
#include "Param/Distrib/Distributions.h"
PhysicalScan::PhysicalScan(const Scale& axis)
: BeamScan(axis)
{
}
PhysicalScan::~PhysicalScan() = default;
void PhysicalScan::copyPhysicalScan(PhysicalScan* dest) const
{
copyBeamScan(dest);
if (m_lambda_distrib)
dest->setWavelengthDistribution(*m_lambda_distrib);
if (m_alpha_distrib)
dest->setGrazingAngleDistribution(*m_alpha_distrib);
if (m_phi_distrib)
dest->setAzimuthalAngleDistribution(*m_phi_distrib);
}
bool PhysicalScan::isCommonFootprint() const
{
const auto* ref_fp = m_beams.front()->footprint();
if (!ref_fp) {
// footprint is not set
for (const auto& b : m_beams)
if (b->footprint())
return false;
} else {
// footprint is set
double ref = ref_fp->widthRatio();
for (const auto& b : m_beams) {
if (!b->footprint())
return false;
// TODO check that footprint type is the same? Isn't it too expensive and redundant?
if (!Numeric::almostEqual(b->footprint()->widthRatio(), ref, 1))
return false;
}
}
return true;
}
std::vector<const INode*> PhysicalScan::nodeChildren() const
{
std::vector<const INode*> result;
for (const INode* n : BeamScan::nodeChildren())
result << n;
if (m_lambda_distrib)
result << m_lambda_distrib.get();
if (m_alpha_distrib)
result << m_alpha_distrib.get();
if (m_phi_distrib)
result << m_phi_distrib.get();
return result;
}
void PhysicalScan::setFootprint(const IFootprint* footprint)
{
for (auto& b : m_beams)
b->setFootprint(footprint);
}
const IFootprint* PhysicalScan::commonFootprint() const
{
if (!isCommonFootprint())
throw std::runtime_error("Footprint function changes during scan. "
"Use 'footprintAt(i)' instead.");
return m_beams.front()->footprint();
}
const IFootprint* PhysicalScan::footprintAt(size_t i) const
{
return m_beams[i]->footprint();
}
double PhysicalScan::commonWavelength() const
{
if (!isCommonWavelength())
throw std::runtime_error("Wavelength changes during scan. "
"Use 'wavelengthAt(i)' instead.");
return m_beams.front()->wavelength();
}
double PhysicalScan::wavelengthAt(size_t i) const
{
return m_beams[i]->wavelength();
}
double PhysicalScan::commonGrazingAngle() const
{
if (!isCommonGrazingAngle())
throw std::runtime_error("Grazing angle changes during scan. "
"Use 'grazingAngleAt(i)' instead.");
return m_beams.front()->alpha_i();
}
void PhysicalScan::setWavelength(double lambda)
{
for (auto& b : m_beams)
b->setWavelength(lambda);
}
void PhysicalScan::setWavelengthDistribution(const IDistribution1D& distr)
{
m_lambda_distrib.reset(distr.clone());
}
double PhysicalScan::grazingAngleAt(size_t i) const
{
return m_beams[i]->alpha_i();
}
double PhysicalScan::commonAzimuthalAngle() const
{
if (!isCommonAzimuthalAngle())
throw std::runtime_error("Azimuthal angle changes during scan. "
"Use 'azimuthalAngleAt(i)' instead.");
return m_beams.front()->phi_i();
}
double PhysicalScan::azimuthalAngleAt(size_t i) const
{
return m_beams[i]->phi_i();
}
void PhysicalScan::setGrazingAngle(double alpha)
{
for (auto& b : m_beams)
b->setGrazingAngle(alpha);
}
void PhysicalScan::setGrazingAngleDistribution(const IDistribution1D& distr)
{
m_alpha_distrib.reset(distr.clone());
}
void PhysicalScan::setAzimuthalAngle(double phi)
{
for (auto& b : m_beams)
b->setAzimuthalAngle(phi);
}
void PhysicalScan::setAzimuthalAngleDistribution(const IDistribution1D& distr)
{
m_phi_distrib.reset(distr.clone());
}
size_t PhysicalScan::nDistributionSamples() const
{
size_t alpha_samples = m_alpha_distrib ? m_alpha_distrib->nSamples() : 1;
size_t lambda_samples = m_lambda_distrib ? m_lambda_distrib->nSamples() : 1;
size_t phi_samples = m_phi_distrib ? m_phi_distrib->nSamples() : 1;
return lambda_samples * alpha_samples * phi_samples;
}
bool PhysicalScan::isCommonWavelength() const
{
const auto ref = m_beams.front()->wavelength();
for (const auto& b : m_beams)
if (!Numeric::almostEqual(b->wavelength(), ref, 1))
return false;
return true;
}
bool PhysicalScan::isCommonGrazingAngle() const
{
const auto ref = m_beams.front()->alpha_i();
for (const auto& b : m_beams)
if (!Numeric::almostEqual(b->alpha_i(), ref, 1))
return false;
return true;
}
bool PhysicalScan::isCommonAzimuthalAngle() const
{
const auto ref = m_beams.front()->phi_i();
for (const auto& b : m_beams)
if (!Numeric::almostEqual(b->phi_i(), ref, 1))
return false;
return true;
}
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