RegionOfInterest.cpp

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// ************************************************************************** //
//
//  BornAgain: simulate and fit scattering at grazing incidence
//
//! @file      Device/Detector/RegionOfInterest.cpp
//! @brief     Implements class RegionOfInterest.
//!
//! @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/Detector/RegionOfInterest.h"
#include "Device/Detector/IDetector2D.h"
#include "Device/Mask/Rectangle.h"
 
RegionOfInterest::RegionOfInterest(const IDetector2D& detector, double xlow, double ylow,
                                   double xup, double yup)
    : RegionOfInterest(xlow, ylow, xup, yup)
{
    initFrom(detector.getAxis(0), detector.getAxis(1));
}
 
RegionOfInterest::RegionOfInterest(const OutputData<double>& data, double xlow, double ylow,
                                   double xup, double yup)
    : RegionOfInterest(xlow, ylow, xup, yup)
{
    if (data.getRank() != 2)
        throw Exceptions::RuntimeErrorException("RegionOfInterest::RegionOfInterest() -> Error. "
                                                "Data is not two-dimensional.");
 
    initFrom(data.getAxis(0), data.getAxis(1));
}
 
RegionOfInterest::RegionOfInterest(double xlow, double ylow, double xup, double yup)
    : m_rectangle(new Rectangle(xlow, ylow, xup, yup)), m_ax1(0), m_ay1(0), m_ax2(0), m_ay2(0),
      m_glob_index0(0)
{
}
 
RegionOfInterest* RegionOfInterest::clone() const
{
    return new RegionOfInterest(*this);
}
 
RegionOfInterest::~RegionOfInterest() = default;
 
RegionOfInterest::RegionOfInterest(const RegionOfInterest& other)
    : ICloneable(), m_rectangle(other.m_rectangle->clone()), m_ax1(other.m_ax1), m_ay1(other.m_ay1),
      m_ax2(other.m_ax2), m_ay2(other.m_ay2), m_glob_index0(other.m_glob_index0),
      m_detector_dims(other.m_detector_dims), m_roi_dims(other.m_roi_dims)
{
}
 
double RegionOfInterest::getXlow() const
{
    return m_rectangle->getXlow();
}
 
double RegionOfInterest::getYlow() const
{
    return m_rectangle->getYlow();
}
 
double RegionOfInterest::getXup() const
{
    return m_rectangle->getXup();
}
 
double RegionOfInterest::getYup() const
{
    return m_rectangle->getYup();
}
 
size_t RegionOfInterest::detectorIndex(size_t roiIndex) const
{
    return m_glob_index0 + ycoord(roiIndex, m_roi_dims)
           + xcoord(roiIndex, m_roi_dims) * m_detector_dims[1];
}
 
size_t RegionOfInterest::roiIndex(size_t globalIndex) const
{
    size_t ny = ycoord(globalIndex, m_detector_dims);
    if (ny < m_ay1 || ny > m_ay2)
        throw Exceptions::RuntimeErrorException("RegionOfInterest::roiIndex() -> Error.");
 
    size_t nx = xcoord(globalIndex, m_detector_dims);
    if (nx < m_ax1 || nx > m_ax2)
        throw Exceptions::RuntimeErrorException("RegionOfInterest::roiIndex() -> Error.");
 
    return ny - m_ay1 + (nx - m_ax1) * m_roi_dims[1];
}
 
size_t RegionOfInterest::roiSize() const
{
    return m_roi_dims[0] * m_roi_dims[1];
}
 
size_t RegionOfInterest::detectorSize() const
{
    return m_detector_dims[0] * m_detector_dims[1];
}
 
bool RegionOfInterest::isInROI(size_t detectorIndex) const
{
    size_t ny = ycoord(detectorIndex, m_detector_dims);
    if (ny < m_ay1 || ny > m_ay2)
        return false;
    size_t nx = xcoord(detectorIndex, m_detector_dims);
    if (nx < m_ax1 || nx > m_ax2)
        return false;
    return true;
}
 
std::unique_ptr<IAxis> RegionOfInterest::clipAxisToRoi(size_t axis_index, const IAxis& axis) const
{
    size_t nbin1 = (axis_index == 0 ? m_ax1 : m_ay1);
    size_t nbin2 = (axis_index == 0 ? m_ax2 : m_ay2);
    return std::unique_ptr<IAxis>(new FixedBinAxis(
        axis.getName(), nbin2 - nbin1 + 1, axis.getBin(nbin1).m_lower, axis.getBin(nbin2).m_upper));
}
 
void RegionOfInterest::initFrom(const IAxis& x_axis, const IAxis& y_axis)
{
    m_detector_dims.push_back(x_axis.size());
    m_detector_dims.push_back(y_axis.size());
 
    m_ax1 = x_axis.findClosestIndex(getXlow());
    m_ax2 = x_axis.findClosestIndex(getXup());
    m_ay1 = y_axis.findClosestIndex(getYlow());
    m_ay2 = y_axis.findClosestIndex(getYup());
 
    m_roi_dims.push_back(m_ax2 - m_ax1 + 1);
    m_roi_dims.push_back(m_ay2 - m_ay1 + 1);
 
    m_glob_index0 = m_ay1 + m_ax1 * m_detector_dims[1];
}