File MaterialInteractor.hpp

namespace Acts

Note

This file is foreseen for the Geometry module to replace Extent

struct MaterialInteractor
#include <Acts/Propagator/MaterialInteractor.hpp>

Material interactor propagator action.

Apply material interactions at a surface and update the track state.

Public Types

using result_type = RecordedMaterial

Public Functions

template<typename propagator_state_t, typename stepper_t>
inline void operator()(propagator_state_t &state, const stepper_t &stepper, result_type &result) const

Interaction with detector material for the ActionList of the Propagator.

It checks if the state has a current surface, in which case the action is performed: the covariance is transported to the position, multiple scattering and energy loss is applied according to the configuration.

Template Parameters
  • propagator_state_t – is the type of Propagagor state

  • stepper_t – Type of the stepper of the propagation

Parameters
  • state – is the mutable propagator state object

  • stepper – The stepper in use

  • result – is the mutable result state object

template<typename propagator_state_t>
inline void operator()(propagator_state_t&) const

Material interaction has no pure observer.

Public Members

bool energyLoss = true

Whether to consider energy loss.

bool multipleScattering = true

Whether to consider multiple scattering.

bool recordInteractions = false

Whether to record all material interactions.

Private Functions

inline void recordResult(const detail::PointwiseMaterialInteraction &d, result_type &result) const

This function records the material effect.

Parameters
  • d[in] Data cache container

  • result[inout] Result storage

inline void recordResult(const detail::VolumeMaterialInteraction &d, result_type &result) const

This function records the material effect.

Parameters
  • d[in] Data cache container

  • result[inout] Result storage

template<typename propagator_state_t, typename stepper_t>
inline void UpdateResult(propagator_state_t &state, const stepper_t &stepper, result_type &result) const

This function update the previous material step.

Parameters
  • state[inout] The state object

  • stepper[in] The stepper instance

  • result[inout] Result storage