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VertexGenerators.hpp
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file VertexGenerators.hpp
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// This file is part of the Acts project.
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//
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// Copyright (C) 2019-2020 CERN for the benefit of the Acts project
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#pragma once
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#include "
Acts/Utilities/Definitions.hpp
"
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#include "
ActsExamples/Framework/RandomNumbers.hpp
"
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#include <random>
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namespace
ActsExamples {
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struct
FixedVertexGenerator
{
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Acts::Vector4D
fixed
= Acts::Vector4D::Zero();
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Acts::Vector4D
operator()
(
RandomEngine
&
/* unused */
)
const
{
return
fixed
; }
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};
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struct
GaussianVertexGenerator
{
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// standard deviation comes first, since it is more likely to be modified
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Acts::Vector4D
stddev
= {0.0, 0.0, 0.0, 0.0};
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Acts::Vector4D
mean
= {0.0, 0.0, 0.0, 0.0};
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Acts::Vector4D
operator()
(
RandomEngine
& rng)
const
{
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auto
normal = std::normal_distribution<double>(0.0, 1.0);
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Acts::Vector4D
rndNormal = {
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normal(rng),
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normal(rng),
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normal(rng),
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normal(rng),
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};
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return
mean
+ rndNormal.cwiseProduct(
stddev
);
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}
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};
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}
// namespace ActsExamples
acts
blob
sPHENIX
Examples
Algorithms
Generators
ActsExamples
Generators
VertexGenerators.hpp
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Jin Huang
. updated:
Mon Jan 22 2024 12:43:24
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