GNN_DataStorage.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TRIGINDETPATTRECOTOOLS_GNN_DATA_STORAGE_H
#define TRIGINDETPATTRECOTOOLS_GNN_DATA_STORAGE_H
 
#include<vector>
#include<map>
#include<algorithm>
#include<array>
#include<limits>
 
#define N_SEG_CONNS  6 //was 6
 
class TrigFTF_GNN_Geometry;
 
struct TrigFTF_GNN_Node {
 
  TrigFTF_GNN_Node(unsigned short l) : m_x(0), m_y(0), m_z(0), m_r(0), m_phi(0), m_layer(l), m_pcw(0), m_locPosY(0) {};
 
  inline float x() const {return m_x;}
  inline float y() const {return m_y;}
  
  inline float phi() const {return m_phi;}
  inline float z() const {return m_z;}
  inline float r() const {return m_r;}
  inline unsigned short layer() const {return m_layer;}
  inline float pixelClusterWidth() const {return m_pcw;}
  inline float localPositionY() const {return m_locPosY;}
  
  inline int sp_idx() const {return m_idx;}
  
  float m_x, m_y, m_z, m_r, m_phi;
  unsigned short m_layer{10000};
  unsigned int m_idx{std::numeric_limits<unsigned int>::max()};
  float m_pcw, m_locPosY;
};
 
 
class TrigFTF_GNN_EtaBin {
public:
 
   struct CompareNodesByPhi {
 
    bool operator()(const TrigFTF_GNN_Node* n1, const TrigFTF_GNN_Node* n2) {
      return n1->phi() < n2->phi();
    }
 
  };
  
  TrigFTF_GNN_EtaBin();
  ~TrigFTF_GNN_EtaBin();
 
  void sortByPhi();
  void initializeNodes();
  bool empty() const {
    return m_vn.empty();
  }
  
  void generatePhiIndexing(float);
 
  float getMinBinRadius() const {
    return m_minRadius;
  }
  
  float getMaxBinRadius() const {
    return m_maxRadius;
  }
  
  std::vector<const TrigFTF_GNN_Node*> m_vn;//nodes of the graph
  std::vector<std::pair<float, unsigned int> > m_vPhiNodes;
 
  std::vector<std::array<float,5> > m_params;//node attributes: m_minCutOnTau, m_maxCutOnTau, m_phi, m_r, m_z;
  std::vector<unsigned int> m_vFirstEdge;//the index of the first incoming graph edge attached to the node
  std::vector<unsigned short> m_vNumEdges;//the total number of incoming graph edges attached to this node
  std::vector<unsigned short> m_vIsConnected;//flag to indicate the node's outer neighbourhood isolation from previously built graph
  float m_minRadius, m_maxRadius;
  unsigned int m_layerKey{0};
};
 
class TrigFTF_GNN_DataStorage {
public:
  TrigFTF_GNN_DataStorage(const TrigFTF_GNN_Geometry&, const std::vector<std::array<float, 5> >&);
  ~TrigFTF_GNN_DataStorage();
 
  int loadPixelGraphNodes(short, const std::vector<TrigFTF_GNN_Node>&, bool);
  int loadStripGraphNodes(short, const std::vector<TrigFTF_GNN_Node>&);
  
  unsigned int numberOfNodes() const;
  void sortByPhi();
  void initializeNodes(bool);
  void generatePhiIndexing(float);
 
 
  TrigFTF_GNN_EtaBin& getEtaBin(int idx) {
    if(idx >= static_cast<int>(m_etaBins.size())) idx = idx-1;
    return m_etaBins.at(idx);
  }
 
protected:
 
  const TrigFTF_GNN_Geometry& m_geo;
  const std::vector<std::array<float, 5> >& m_mlLUT;
  
  std::vector<TrigFTF_GNN_EtaBin> m_etaBins; 
 
};
 
class TrigFTF_GNN_Edge {
public:
 
  struct CompareLevel {
  public:
    bool operator()(const TrigFTF_GNN_Edge* pE1, const TrigFTF_GNN_Edge* pE2) {
      return pE1->m_level > pE2->m_level;
    }
  };
  
  TrigFTF_GNN_Edge(const TrigFTF_GNN_Node* n1, const TrigFTF_GNN_Node* n2, float p1, float p2, float p3) : m_n1(n1), m_n2(n2), m_level(1), m_next(1), m_nNei(0) {
    m_p[0] = p1;
    m_p[1] = p2;
    m_p[2] = p3;
  }
  
  TrigFTF_GNN_Edge() : m_n1(nullptr), m_n2(nullptr), m_level(-1), m_next(-1), m_nNei(0) {};
  
  
  const TrigFTF_GNN_Node* m_n1{nullptr};
  const TrigFTF_GNN_Node* m_n2{nullptr};
 
  signed char m_level{-1}, m_next{-1};
 
  unsigned char m_nNei{0};
  float m_p[3]{};
  
  unsigned int m_vNei[N_SEG_CONNS]{};//global indices of the connected edges
 
};
 
#endif