ApproachDescriptor.cxx

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/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/
 
// ApproachDescriptor.h, (c) ATLAS Detector software
 
// Trk
#include "TrkGeometry/ApproachDescriptor.h"
 
const Trk::ApproachSurfaces* Trk::ApproachDescriptor::approachSurfaces(
    const Amg::Vector3D& pos, const Amg::Vector3D& dir) const {
  // return the single approach surfaces
  if (m_approachSurfaces) return (m_approachSurfaces.get());
  // there's new surface given
  if (m_approachSurfaceArraySurface) {
    Trk::Intersection asInter =
        m_approachSurfaceArraySurface->straightLineIntersection(pos, dir);
    if (asInter.valid)
      return (m_approachSurfaceArray->object(asInter.position));
  }
  // get the bin
  return (m_approachSurfaceArray->object(pos));
}