MMT_Hit.cxx

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/*
 *   Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
 */
 
#include "TrigT1NSWSimTools/MMT_Hit.h"
#include "MuonReadoutGeometry/MuonChannelDesign.h"
#include "MuonReadoutGeometry/MuonDetectorManager.h"
#include "MuonReadoutGeometry/MMReadoutElement.h"
#include <cmath>
 
MMT_Hit::MMT_Hit(const hitData_entry &entry, const MuonGM::MuonDetectorManager* detManager, const std::string_view stName, const std::vector<ROOT::Math::XYZVector> &planeCoordinates)
   : m_station_name(stName)
 {
  m_sector = stName[2];
  m_VMM_chip = entry.VMM_chip;
  m_MMFE_VMM = entry.MMFE_VMM;
  m_ART_ASIC = std::ceil(1.*entry.MMFE_VMM/2);
  m_station_eta = entry.station_eta;
  m_station_phi = entry.station_phi;
  m_multiplet = entry.multiplet;
  m_gasgap = entry.gasgap;
  m_plane = entry.plane;
  m_strip = entry.strip;
  m_localX = entry.localX;
  m_BC_time = entry.BC_time;
  m_age = entry.BC_time;
  m_Z = -1.;
  m_R = -1.;
  m_Rp = -1.;
  m_isNoise = false;
  m_time = entry.gtime;
  m_RZslope = -1.;
  m_PitchOverZ = -1.;
  m_shift = -1.;
 
  if(m_strip > 8191 || m_strip<0){
    m_strip = 0;
  }
  int istrip = (std::abs(m_station_eta)-1) * (64*8*10) + m_strip; //here needed the absolute index of the strip on the sector layer (m_strip is only up to 5119)
 
  // region represent the index of the mmfe8 in the plane
  int region = int(float(istrip)/(64*8));
  // map of mmfe8s layer,radius(MMFE8 index on sector)
  unsigned int mmfe8s[8][16];
  // loop on layers
  for( unsigned int L=0; L<8; L++){
    // loop on pcbs
    for(unsigned int p=1; p<9; p++){
      // loop on sides
      for(unsigned int s=0; s<2; s++){ //loop on 0 (Left) and 1 (Right), same convention used also later
        unsigned int R = (L%2==s) ? (p-1)*2 : (p-1)*2+1;
        mmfe8s[L][R]=s;
      }
    }
  }
  // re-assigning as seems not to work with new stand-alone run with RecoTf from HITS samples
  m_MMFE_VMM = region; // index of the MMFE8 board on the layer
  m_VMM_chip = int(1. *istrip /64.); // index of the VMM chip on the layer
  // art asic id
  if(!int(m_plane/2.)%2){
    if (mmfe8s[m_plane][region]==1){ //Right
      m_ART_ASIC = 1-int(region/8);
    }else{
      m_ART_ASIC = int(region/8);
    }
  }else{
    if (mmfe8s[m_plane][region]==0){ //Left
      m_ART_ASIC = 1-int(region/8);
    }else{
      m_ART_ASIC = int(region/8);
    }
  }
 
  // if Right side add 2 to the ART Asic Index
  if(mmfe8s[m_plane][region]==0){
    m_ART_ASIC+=2;
  }
 
  Identifier strip_id = detManager->mmIdHelper()->channelID(m_station_name, m_station_eta, m_station_phi, m_multiplet, m_gasgap, m_strip);
  const MuonGM::MMReadoutElement* readout = detManager->getMMReadoutElement(strip_id);
  Amg::Vector3D globalPos(0.0, 0.0, 0.0);
  if(readout->stripGlobalPosition(strip_id, globalPos)) {
 
    m_R = globalPos.perp();
    m_Z = globalPos.z();
    const double stripPitch{readout->getDesign(strip_id)->inputPitch};
    m_PitchOverZ = stripPitch/m_Z;
    m_RZslope = m_R / m_Z;
 
    double index = std::round((std::abs(m_RZslope)-0.1)/5e-04); // 0.0005 is approx. the step in slope achievable with a road size of 8 strips
    double roundedSlope = 0.1 + index*((0.6 - 0.1)/1000.); 
    const double distanceFromZAxis = readout->absTransform().translation().perp() - 0.5*readout->getRsize();
    m_Rp = distanceFromZAxis + roundedSlope*(planeCoordinates[m_plane].Z() - planeCoordinates[0].Z());
    m_shift = m_Rp / m_Z;
  }
}
 
MMT_Hit::MMT_Hit(const MMT_Hit* hit)
  : m_sector (hit->m_sector),
    m_station_name (hit->m_station_name),
    m_VMM_chip (hit->m_VMM_chip),
    m_MMFE_VMM (hit->m_MMFE_VMM),
    m_ART_ASIC (hit->m_ART_ASIC),
    m_plane (hit->m_plane),
    m_station_eta (hit->m_station_eta),
    m_station_phi (hit->m_station_phi),
    m_multiplet (hit->m_multiplet),
    m_gasgap (hit->m_gasgap),
    m_strip (hit->m_strip),
    m_localX (hit->m_localX),
    m_RZslope (hit->m_RZslope),
    m_BC_time (hit->m_BC_time),
    m_age (hit->m_age),
    m_Z (hit->m_Z),
    m_PitchOverZ (hit->m_PitchOverZ),
    m_R (hit->m_R),
    m_Rp (hit->m_Rp),
    m_isNoise (hit->m_isNoise),
    m_time (hit->m_time),
    m_shift (hit->m_shift)
{
}
 
bool MMT_Hit::isX() const {
  int id = this->getPlane();
  return (id == 0 || id == 1 || id == 6 || id == 7);
}
 
bool MMT_Hit::isU() const {
  int id = this->getPlane();
  return (id == 2 || id == 4);
}
 
bool MMT_Hit::isV() const {
  int id = this->getPlane();
  return (id == 3 || id == 5);
}
 
bool MMT_Hit::verifyHit() const {
  /*
   * Put here all Hit checks, probably redundant if digitization is ok
   */
  if (this->getBC() < 0.) return false;
  else if (std::isinf(this->getRZSlope())) return false;
  else if (this->getChannel() < 1 || this->getChannel() > 8192) return false;
  else return true;
}