File ConstrainedStep.hpp¶

namespace Acts

Set the Geometry Context PLUGIN.

Set the Calibration Context PLUGIN.

Convenience functions to ease creation of and Acts::InterpolatedMaterialMap and to avoid code duplication.

Set the Mangetic Field Context PLUGIN.

Convenience functions to ease creation of and Acts::InterpolatedBFieldMap and to avoid code duplication.

Currently implemented for the two most common formats: rz and xyz.

struct ConstrainedStep¶

#include <Acts/Propagator/ConstrainedStep.hpp>

A constrained step class for the steppers.

Public Types

using Scalar = ActsScalar ¶

enum Type¶

the types of constraints from accuracy - this can vary up and down given a good step estimator from actor - this would be a typical navigation step from aborter - this would be a target condition from user - this is user given for what reason ever

Values:

enumerator accuracy¶

enumerator actor¶

enumerator aborter¶

enumerator user¶

Public Functions

inline ConstrainedStep(Scalar value)¶

constructor from double

Parameters: value – is the user given initial value

inline Type currentType() const¶: Access to currently leading min type.

inline Scalar max() const¶

Return the maximum step constraint.

Returns: The max step constraint

inline Scalar min() const¶

Return the minimum step constraint.

Returns: The min step constraint

inline operator Scalar() const¶: Cast operator to double, returning the min/max value depending on the direction.

inline ConstrainedStep &operator=(const Scalar &value)¶

The assignment operator from one double.

Note

this will set only the accuracy, as this is the most exposed to the Propagator, this adapts also the direction

Parameters: value – is the new accuracy value

inline void release(Type type)¶

release a certain constraint value to the (signed) biggest value available, hence it depends on the direction

Parameters: type – is the constraint type to be released

inline std::string toString() const¶: return the split value as string for debugging

inline void update(const Scalar &value, Type type, bool releaseStep = false)¶

Update the step size of a certain type.

Only navigation and target abortion step size updates may change the sign due to overstepping

Parameters

value – is the new value to be updated
type – is the constraint type
releaseStep – Allow step size to increase again

inline Scalar value(Type type) const¶

Access to a specific value.

Parameters: type – is the resquested parameter type

Public Members

NavigationDirection direction = forward ¶: The Navigation direction.

std::array<Scalar, 4> values = {{std::numeric_limits<Scalar>::max(), std::numeric_limits<Scalar>::max(), std::numeric_limits<Scalar>::max(), std::numeric_limits<Scalar>::max()}}¶: the step size tuple