CylinderUtils.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
#ifndef ACTSEVENT_CYLINDERUTILS_H
#define ACTSEVENT_CYLINDERUTILS_H
 
#include "GeoPrimitives/GeoPrimitives.h"
#include "Acts/Definitions/Direction.hpp"
 
#include <span>
 
namespace Acts{
    class BoundTrackParameters;
    class GeometryContext;
} 
 
 
namespace ActsTrk {
    std::array<double, 2> cylinderIntersectPaths(const Amg::Vector3D& pos, 
                                                 const Amg::Vector3D& dir,
                                                 const double cylinderR);
    std::optional<Acts::BoundTrackParameters> 
        expressOnCylinder(const Acts::GeometryContext& tgContext,
                           const Acts::BoundTrackParameters& boundPars,
                           const double cylinderR,
                           const Acts::Direction dir = Acts::Direction::Forward());
    std::vector<Acts::BoundTrackParameters> 
        expressOnCylinders(const Acts::GeometryContext& tgContext,
                            const Acts::BoundTrackParameters& boundPars,
                            std::span<const double> cylinderRadii,
                            const Acts::Direction dir = Acts::Direction::Forward());
    
}
 
 
#endif