Line.h

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2007 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/DllConfig.h"
#include "MantidKernel/V3D.h"
#include <boost/container/small_vector.hpp>
#include <complex>
#include <list>
 
namespace Mantid {
 
namespace Kernel {
template <typename T> class Matrix;
}
 
namespace Geometry {
//--------------------------------------
// Forward declarations
//--------------------------------------
class Quadratic;
class Cylinder;
class Plane;
class Sphere;
 
class MANTID_GEOMETRY_DLL Line {
public:
  using PType = boost::container::small_vector<Kernel::V3D, 5>;
 
  Line();
  Line(const Kernel::V3D &, const Kernel::V3D &);
  Line *clone() const;
 
  Kernel::V3D getPoint(const double lambda) const;             
  const Kernel::V3D &getOrigin() const { return m_origin; }    
  const Kernel::V3D &getDirect() const { return m_direction; } 
  double distance(const Kernel::V3D &) const;                  
  int isValid(const Kernel::V3D &) const;                      
  void print() const;
 
  void rotate(const Kernel::Matrix<double> &);
  void displace(const Kernel::V3D &);
 
  int setLine(const Kernel::V3D &,
              const Kernel::V3D &); 
 
  int intersect(PType &, const Quadratic &) const;
  int intersect(PType &, const Cylinder &) const;
  int intersect(PType &, const Plane &) const;
  int intersect(PType &, const Sphere &) const;
 
private:
  Kernel::V3D m_origin;    
  Kernel::V3D m_direction; 
 
  int lambdaPair(const int ix, const std::pair<std::complex<double>, std::complex<double>> &SQ, PType &PntOut) const;
};
 
} // namespace Geometry
 
} // NAMESPACE Mantid