PersistenceDiagramUtils.h

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#pragma once
 
#include <array>
#include <tuple>
#include <vector>
 
#include <BaseClass.h>
 
namespace ttk {

  struct CriticalVertex {
    ttk::SimplexId id;
    double sfValue;
    /* global offset of the vertex*/
    ttk::SimplexId offset;
    std::array<float, 3> coords;
    ttk::CriticalType type;
  };

  struct PersistencePair {
    ttk::CriticalVertex birth;
    ttk::CriticalVertex death;
    ttk::SimplexId dim;
    char isFinite;

    bool operator<(const PersistencePair &rhs) const {
      return this->birth.sfValue < rhs.birth.sfValue;
    }

    inline double persistence() const {
      return this->death.sfValue - this->birth.sfValue;
    }
  };

  using DiagramType = std::vector<PersistencePair>;

  using MatchingType = std::tuple<int, 
                                  int, 
                                  double 
                                  >;
 
}; // namespace ttk