GeoTRTUncompressedHit.icc

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/
 
#include "InDetSimEvent/TRTUncompressedHit.h"
#include "TRT_ReadoutGeometry/TRT_DetectorManager.h"
#include "TRT_ReadoutGeometry/TRT_BarrelElement.h"
#include "TRT_ReadoutGeometry/TRT_EndcapElement.h"
 
#include <bitset>
 
inline GeoTRTUncompressedHit::GeoTRTUncompressedHit (const TRTUncompressedHit & h)
 : m_hit(&h)
{
}
 
inline HepGeom::Point3D<double> GeoTRTUncompressedHit::getGlobalPosition(const InDetDD::TRT_DetectorManager* mgr) const {
 
 size_t hitID = m_hit->GetHitID(), strawID=0,layerID=0, moduleID=0, ringID=0, trtID=0,sectorID=0, wheelID=0, planeID=0;
 static const size_t mask  = 0x1F;
 static const size_t shift = 5;
 std::bitset<32> idBits(hitID);
 if (!idBits[21]/*IE: BARREL*/ ) {
   strawID = hitID & mask;
   hitID >>= shift;
   layerID = hitID & mask;
   hitID >>= shift;
   moduleID = hitID & mask;
   hitID >>= shift;
   ringID = hitID & mask;
   trtID = hitID >> shift;
   const InDetDD::TRT_BarrelElement *element = mgr->getBarrelElement(trtID,ringID,moduleID,layerID);
   if (element) {
     HepGeom::Point3D<double> v(m_hit->GetPreStepX(), m_hit->GetPreStepY(), m_hit->GetPreStepZ());
     return element->getAbsoluteTransform(strawID)*v;
   }
 }
 else /*ENDCAP*/ {
   strawID = hitID & mask;
   hitID >>= shift;
   planeID = hitID & mask;
   hitID >>= shift;
   sectorID = hitID & mask;
   hitID >>= shift;
   wheelID = hitID & mask;
   trtID = hitID >> shift;
   bool isPositive = trtID==2 ? 1:0;
   const InDetDD::TRT_EndcapElement *element = mgr->getEndcapElement(isPositive,wheelID,planeID,sectorID);
   if (element) {
     HepGeom::Point3D<double> v(m_hit->GetPreStepX(), m_hit->GetPreStepY(), m_hit->GetPreStepZ());
     return element->getAbsoluteTransform(strawID)*v;
   }
 }
 
 return HepGeom::Point3D<double>(0.0,0.0,0.0);
}