Internal_point.h

/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
 *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
 *    Author:       Francois Godi
 *
 *    Copyright (C) 2015 Inria
 *
 *    Modification(s):
 *      - YYYY/MM Author: Description of the modification
 */
 
#ifndef INTERNAL_POINT_H_
#define INTERNAL_POINT_H_
 
namespace Gudhi {
 
namespace persistence_diagram {
 
int null_point_index();
 
struct Internal_point {
  double vec[2];
  int point_index;
 
  Internal_point() { }
 
  Internal_point(double x, double y, int p_i) {
    vec[0] = x;
    vec[1] = y;
    point_index = p_i;
  }
 
  double x() const {
    return vec[ 0 ];
  }
 
  double y() const {
    return vec[ 1 ];
  }
 
  double& x() {
    return vec[ 0 ];
  }
 
  double& y() {
    return vec[ 1 ];
  }
 
  bool operator==(const Internal_point& p) const {
    return point_index == p.point_index;
  }
 
  bool operator!=(const Internal_point& p) const {
    return !(*this == p);
  }
};
 
inline int null_point_index() {
  return -1;
}
 
struct Construct_coord_iterator {
  typedef const double* result_type;
 
  const double* operator()(const Internal_point& p) const {
    return p.vec;
  }
 
  const double* operator()(const Internal_point& p, int) const {
    return p.vec + 2;
  }
};
 
}  // namespace persistence_diagram
 
}  // namespace Gudhi
 
#endif  // INTERNAL_POINT_H_