File UncorrelatedHitSmearer.hpp¶
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namespace ActsFatras
Typedefs
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using SingleParameterSmearFunction = std::function<Acts::Result<std::pair<double, double>>(double, generator_t&)>¶
Smearing function definition for single track parameters.
The function takes the unsmeared parameter and returns the smeared value and a standard deviation.
- Template Parameters
generator_t – The type of the random generator.
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template<typename generator_t, size_t kSize>
struct BoundParametersSmearer¶ - #include <ActsFatras/Digitization/UncorrelatedHitSmearer.hpp>
Uncorrelated smearing algorithm for fast digitisation of bound parameters.
The smearer takes a single simulated
Hit
and generates a smeared parameter vector and associated covariance matrix.- Template Parameters
generator_t – Random number generator type
kSize – Number of smeared parameters
Public Types
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using CovarianceMatrix = Acts::ActsSymMatrix<kSize>¶
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using ParametersVector = Acts::ActsVector<kSize>¶
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using Result = Acts::Result<std::pair<ParametersVector, CovarianceMatrix>>¶
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using Scalar = Acts::ActsScalar¶
Public Functions
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inline Result operator()(generator_t &rng, const Hit &hit, const Acts::Surface &surface, const Acts::GeometryContext &geoCtx) const¶
Generate smeared measured for configured parameters.
- Parameters
rng – Random number generator
hit – Simulated hit
surface – Local surface on which the hit is smeared
geoCtx – Geometry context
- Return values
Smeared – parameters vector and associated covariance on success
Error – code for failure
Public Members
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std::array<Acts::BoundIndices, kSize> indices = {}¶
Parameter indices that will be used to create the smeared measurements.
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std::array<SingleParameterSmearFunction<generator_t>, kSize> smearFunctions = {}¶
Public Static Functions
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static inline constexpr size_t size()¶
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template<typename generator_t, size_t kSize>
struct FreeParametersSmearer¶ - #include <ActsFatras/Digitization/UncorrelatedHitSmearer.hpp>
Uncorrelated smearing algorithm for fast digitisation of free parameters.
The smearer takes a single simulated
Hit
and generates a smeared parameter vector and associated covariance matrix.Note
Uncorrelated smearing of the direction using each components individually is not recommended
- Template Parameters
generator_t – Random number generator type
kSize – Number of smeared parameters
Public Types
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using CovarianceMatrix = Acts::ActsSymMatrix<kSize>¶
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using ParametersVector = Acts::ActsVector<kSize>¶
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using Result = Acts::Result<std::pair<ParametersVector, CovarianceMatrix>>¶
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using Scalar = Acts::ActsScalar¶
Public Functions
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inline Result operator()(generator_t &rng, const Hit &hit) const¶
Generate smeared measured for configured parameters.
- Parameters
rng – Random number generator
hit – Simulated hit
- Return values
Smeared – parameters vector and associated covariance on success
Error – code for failure
- Returns
Smeared free parameter set wrapped in a Result<…> object
Public Members
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std::array<Acts::FreeIndices, kSize> indices = {}¶
Parameter indices that will be used to create the smeared measurements.
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std::array<SingleParameterSmearFunction<generator_t>, kSize> smearFunctions¶
Public Static Functions
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static inline constexpr size_t size()¶
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using SingleParameterSmearFunction = std::function<Acts::Result<std::pair<double, double>>(double, generator_t&)>¶