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PropagationCompareAtlasEigenConstant.cpp
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2020 CERN for the benefit of the Acts project
4 //
5 // This Source Code Form is subject to the terms of the Mozilla Public
6 // License, v. 2.0. If a copy of the MPL was not distributed with this
7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 
9 #include <boost/test/data/test_case.hpp>
10 #include <boost/test/unit_test.hpp>
11 
18 
19 #include <limits>
20 #include <utility>
21 
22 #include "PropagationDatasets.hpp"
23 #include "PropagationTests.hpp"
24 
25 namespace {
26 
27 namespace ds = ActsTests::PropagationDatasets;
28 using namespace Acts::UnitLiterals;
29 
30 using MagneticField = Acts::ConstantBField;
31 using AtlasStepper = Acts::AtlasStepper<MagneticField>;
32 using AtlasPropagator = Acts::Propagator<AtlasStepper>;
35 
36 // absolute parameter tolerances for position, direction, and absolute momentum
37 constexpr auto epsPos = 1_um;
38 constexpr auto epsDir = 0.125_mrad;
39 constexpr auto epsMom = 1_eV;
40 // relative covariance tolerance
41 constexpr auto epsCov = 0.0125;
42 
45 
46 inline std::pair<AtlasPropagator, EigenPropagator> makePropagators(double bz) {
47  MagneticField field(Acts::Vector3D(0.0, 0.0, bz));
48  return {AtlasPropagator(AtlasStepper(field)),
50 }
51 
52 } // namespace
53 
54 BOOST_AUTO_TEST_SUITE(PropagationCompareAtlasEigenConstant)
55 
57  ds::phi* ds::theta* ds::absMomentum* ds::chargeNonZero*
58  ds::pathLength* ds::magneticField,
59  phi, theta, p, q, s, bz) {
60  auto [atlasPropagator, eigenPropagator] = makePropagators(bz);
61  runForwardComparisonTest(atlasPropagator, eigenPropagator, geoCtx, magCtx,
62  makeParametersCurvilinear(phi, theta, p, q), s,
63  epsPos, epsDir, epsMom, epsCov);
64 }
65 
66 BOOST_DATA_TEST_CASE(ToCylinderAlongZ,
69  phi, theta, p, q, s, bz) {
70  auto [atlasPropagator, eigenPropagator] = makePropagators(bz);
71  runToSurfaceComparisonTest(atlasPropagator, eigenPropagator, geoCtx, magCtx,
73  ZCylinderSurfaceBuilder(), epsPos, epsDir, epsMom,
74  epsCov);
75 }
76 
80  phi, theta, p, q, s, bz) {
81  auto [atlasPropagator, eigenPropagator] = makePropagators(bz);
82  runToSurfaceComparisonTest(atlasPropagator, eigenPropagator, geoCtx, magCtx,
84  DiscSurfaceBuilder(), epsPos, epsDir, epsMom,
85  epsCov);
86 }
87 
91  phi, theta, p, q, s, bz) {
92  auto [atlasPropagator, eigenPropagator] = makePropagators(bz);
93  runToSurfaceComparisonTest(atlasPropagator, eigenPropagator, geoCtx, magCtx,
95  PlaneSurfaceBuilder(), epsPos, epsDir, epsMom,
96  epsCov);
97 }
98 
99 BOOST_DATA_TEST_CASE(ToStrawAlongZ,
102  phi, theta, p, q, s, bz) {
103  auto [atlasPropagator, eigenPropagator] = makePropagators(bz);
104  runToSurfaceComparisonTest(atlasPropagator, eigenPropagator, geoCtx, magCtx,
106  ZStrawSurfaceBuilder(), epsPos, epsDir, epsMom,
107  epsCov);
108 }
109 
110 BOOST_AUTO_TEST_SUITE_END()