detray::line_stepper< algebra_t, constraint_t, policy_t, inspector_t >::state Struct Reference

State carried by the straight-line stepper. More...

#include <detray/propagator/line_stepper.hpp>

Inheritance diagram for detray::line_stepper< algebra_t, constraint_t, policy_t, inspector_t >::state:

Collaboration diagram for detray::line_stepper< algebra_t, constraint_t, policy_t, inspector_t >::state:

Public Types
using	base_state = typename base_type::template state<>
	Base state providing common track, path, and constraint storage.

Public Member Functions
void	advance_jacobian ()
	Advance the free-parameter transport Jacobian for a straight segment.
void	advance_track ()
	Update the track state in a straight line.
constexpr scalar_type	dqopds (const material< scalar_type > *) const
	Derivative of q/p with respect to path length in vacuum.
constexpr vector3_type	dtds () const
	Derivative of time with respect to path length for straight motion.

Static Public Attributes
static constexpr const stepping::id	id = stepping::id::e_linear
	Stepper identifier used by propagation diagnostics.

Detailed Description

template<concepts::algebra algebra_t, typename constraint_t = unconstrained_step<dscalar<algebra_t>>, typename policy_t = stepper_default_policy<dscalar<algebra_t>>, typename inspector_t = stepping::void_inspector>
struct detray::line_stepper< algebra_t, constraint_t, policy_t, inspector_t >::state

State carried by the straight-line stepper.

Member Function Documentation

dqopds()

template<concepts::algebra algebra_t, typename constraint_t = unconstrained_step<dscalar<algebra_t>>, typename policy_t = stepper_default_policy<dscalar<algebra_t>>, typename inspector_t = stepping::void_inspector>

scalar_type detray::line_stepper< algebra_t, constraint_t, policy_t, inspector_t >::state::dqopds ( const material< scalar_type > * ) const

constexpr

Derivative of q/p with respect to path length in vacuum.

Returns

Zero because this stepper does not model energy loss.

dtds()

template<concepts::algebra algebra_t, typename constraint_t = unconstrained_step<dscalar<algebra_t>>, typename policy_t = stepper_default_policy<dscalar<algebra_t>>, typename inspector_t = stepping::void_inspector>

vector3_type detray::line_stepper< algebra_t, constraint_t, policy_t, inspector_t >::state::dtds ( ) const

constexpr

Derivative of time with respect to path length for straight motion.

Returns

Zero time derivative for this straight-line model.