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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Resample/Slice/ZLimits.h
//! @brief Defines class ZLimits.
//!
//! @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)
//
// ************************************************************************************************
#ifdef SWIG
#error no need to expose this header to Swig
#endif // SWIG
#ifndef BORNAGAIN_RESAMPLE_SLICE_ZLIMITS_H
#define BORNAGAIN_RESAMPLE_SLICE_ZLIMITS_H
#include "Base/Type/Span.h"
#include <cmath>
#include <iostream>
#include <limits>
//! An interval. Limits are of type double, and may be infinite.
//! Used for the z-coordinate, especially when slicing form factors.
//!
class ZLimits : public Span {
public:
static constexpr double inf = std::numeric_limits<double>::infinity();
ZLimits()
: Span(-inf, inf)
{
}
ZLimits(double low, double hig)
: Span(low, hig)
{
}
bool isFinite() const;
double higOr0() const { return std::isfinite(hig()) ? hig() : 0; }
double thicknessOr0() const { return isFinite() ? hig() - low() : 0; }
//! Returns the union of two ZLimits (the minimal interval that contains both input intervals).
static ZLimits unite(const ZLimits& left, const ZLimits& right);
};
// used in ZLimitsTest:
bool operator==(const ZLimits& left, const ZLimits& right);
bool operator!=(const ZLimits& left, const ZLimits& right);
#endif // BORNAGAIN_RESAMPLE_SLICE_ZLIMITS_H
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