ActsSurfaceMappingTool.cxx

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
#include "ActsGeometry/ActsSurfaceMappingTool.h"
 
// ATHENA
#include "GaudiKernel/IInterface.h"
// PACKAGE
#include "ActsInterop/Logger.h"
#include "ActsGeometryInterfaces/ActsGeometryContext.h"
#include "ActsGeometry/ActsTrackingGeometryTool.h"
#include "ActsGeometryInterfaces/IActsTrackingGeometryTool.h"
 
// ActsSurfaceMappingTool
#include "Acts/Geometry/GeometryContext.hpp"
#include "Acts/Propagator/Navigator.hpp"
#include "Acts/Propagator/Propagator.hpp"
#include "Acts/Propagator/StraightLineStepper.hpp"
 
// STL
#include <iostream>
#include <memory>
 
 
ActsSurfaceMappingTool::ActsSurfaceMappingTool(const std::string& type, const std::string& name,
    const IInterface* parent)
  : base_class(type, name, parent)
{
}
 
StatusCode
ActsSurfaceMappingTool::initialize()
{
  ATH_MSG_INFO("Initializing ACTS Surface Mapper");
 
  ATH_CHECK( m_trackingGeometryTool.retrieve() );
 
  m_trackingGeometry = m_trackingGeometryTool->trackingGeometry();
 
  Acts::Navigator navigator( Acts::Navigator::Config{ m_trackingGeometry } );
  
  // Make stepper and propagator
  SlStepper stepper;
  StraightLinePropagator propagator = StraightLinePropagator(std::move(stepper), std::move(navigator));
 
  Acts::SurfaceMaterialMapper::Config smmConfig;
  smmConfig.mapperDebugOutput = false;
  m_mapper = std::make_shared<Acts::SurfaceMaterialMapper>(
      smmConfig,
      std::move(propagator),
      makeActsAthenaLogger(this, "SurfaceMaterialMapper"));
 
  m_geoContext = m_trackingGeometryTool->getNominalGeometryContext();
 
  ATH_MSG_INFO("ACTS Surface Mapper successfully initialized");
  return StatusCode::SUCCESS;
}
 
Acts::SurfaceMaterialMapper::State
ActsSurfaceMappingTool::mappingState() const
{
  auto mappingState = m_mapper->createState(
    m_geoContext.context(), m_magFieldContext, *m_trackingGeometry);
 
  return mappingState;
}