MDHistoDimensionBuilder.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include "MantidGeometry/MDGeometry/MDHistoDimension.h"
#include "MantidKernel/UnitLabel.h"
 
#include <cmath>
 
namespace Mantid {
namespace Geometry {
 
class MANTID_GEOMETRY_DLL MDHistoDimensionBuilder {
public:
  template <typename CoordT> static void resizeToFitMDBox(CoordT &min, CoordT &max) {
    // Always use minimum float value as DBL_EPS is always too small
    static constexpr CoordT twoEps = 2 * std::numeric_limits<float>::epsilon();
    if (std::fabs(min) > twoEps)
      min *= (1 - std::copysign(twoEps, min));
    else
      min -= twoEps;
    if (std::fabs(max) > twoEps)
      max *= (1 + std::copysign(twoEps, max));
    else
      max += twoEps;
  }
 
  MDHistoDimensionBuilder();
  void setName(const std::string &name);
  void setId(std::string id);
  void setUnits(const Kernel::UnitLabel &units);
  void setMin(double min);
  void setMax(double max);
  void setNumBins(size_t nbins);
  void setFrameName(std::string frameName);
 
  size_t getNumBins() const { return m_nbins; }
  MDHistoDimension *createRaw();
  IMDDimension_sptr create();
 
private:
  std::string m_name;
  std::string m_id;
  Kernel::UnitLabel m_units;
  double m_min;
  double m_max;
  size_t m_nbins;
  bool m_minSet;
  bool m_maxSet;
  std::string m_frameName;
};
 
using Vec_MDHistoDimensionBuilder = std::vector<MDHistoDimensionBuilder>;
} // namespace Geometry
} // namespace Mantid