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File indexing completed on 2025-12-24 09:41:54
0001 // This file is part of the ACTS project. 0002 // 0003 // Copyright (C) 2016 CERN for the benefit of the ACTS project 0004 // 0005 // This Source Code Form is subject to the terms of the Mozilla Public 0006 // License, v. 2.0. If a copy of the MPL was not distributed with this 0007 // file, You can obtain one at https://mozilla.org/MPL/2.0/. 0008 0009 #pragma once 0010 0011 #include "Acts/Definitions/Algebra.hpp" 0012 #include "Acts/Geometry/GeometryContext.hpp" 0013 #include "Acts/Geometry/Polyhedron.hpp" 0014 #include "Acts/Surfaces/Surface.hpp" 0015 #include "Acts/Utilities/BinningData.hpp" 0016 0017 #include <ranges> 0018 #include <vector> 0019 0020 namespace Acts::Experimental::detail { 0021 0022 enum class ReferenceGeneratorType { 0023 Center, 0024 AxisDirection, 0025 Polyhedron, 0026 Projected 0027 }; 0028 0029 struct IReferenceGenerator { 0030 virtual ~IReferenceGenerator() = default; 0031 0032 /// Helper to access reference positions for filling the grid 0033 /// 0034 /// @param gctx the geometry context of this operation 0035 /// @param surface the surface for which the reference points are to be accessed 0036 /// 0037 /// @return a vector of reference points for filling 0038 virtual const std::vector<Vector3> references( 0039 const GeometryContext& gctx, const Surface& surface) const = 0; 0040 0041 /// Access the type of the reference generator 0042 virtual ReferenceGeneratorType type() const = 0; 0043 }; 0044 0045 /// A struct to access the center position 0046 /// 0047 /// This generator will provide only one filling point and hence 0048 /// only a single bin in the indexed grid. 0049 struct CenterReferenceGenerator : public IReferenceGenerator { 0050 /// Helper to access the Center point of for filling the grid 0051 /// 0052 /// @param gctx the geometry context of this operation 0053 /// @param surface the surface for which the reference point is to be accessed 0054 /// 0055 /// @return a vector of reference points for filling 0056 const std::vector<Vector3> references(const GeometryContext& gctx, 0057 const Surface& surface) const override { 0058 return {surface.center(gctx)}; 0059 } 0060 0061 /// Access the type of the reference generator 0062 ReferenceGeneratorType type() const override { 0063 return ReferenceGeneratorType::Center; 0064 } 0065 }; 0066 0067 /// A struct to access reference positions based on bin values 0068 /// 0069 /// @tparam bVAL the binning value to be used for the binning position call 0070 /// 0071 /// This generator will provide only one filling point and hence 0072 /// only a single bin in the indexed grid. 0073 template <AxisDirection bVAL> 0074 struct AxisDirectionReferenceGenerator : public IReferenceGenerator { 0075 /// Helper to access a reference position based on binning value 0076 /// 0077 /// @param gctx the geometry context of this operation 0078 /// @param surface the surface for which the reference point is to be accessed 0079 /// 0080 /// @return a vector of reference points for filling 0081 const std::vector<Vector3> references(const GeometryContext& gctx, 0082 const Surface& surface) const override { 0083 return {surface.referencePosition(gctx, bVAL)}; 0084 } 0085 0086 /// Access the type of the reference generator 0087 ReferenceGeneratorType type() const override { 0088 return ReferenceGeneratorType::AxisDirection; 0089 } 0090 }; 0091 0092 /// A struct to access generated vertices from surface polyhedrons 0093 /// These vertices are then used to find the bin boundary box for the 0094 /// indexed grid. 0095 /// 0096 /// 0097 /// The grid filling then completes the empty bins in between and 0098 /// expands if necessary. 0099 struct PolyhedronReferenceGenerator : public IReferenceGenerator { 0100 /// This is for the barycenter addition 0101 bool addBarycenter = false; 0102 0103 /// @brief The number of segments for the polyhedron approximation 0104 int nSegements = 1; 0105 0106 /// Absolute expansion value for the reference points 0107 double expansionValue = 0.0; 0108 0109 /// Helper to access the Center point of for filling the grid 0110 /// 0111 /// @param gctx the geometry context of this operation 0112 /// @param surface the surface for which the reference point is to be accessed 0113 /// 0114 /// @return a vector of reference points for filling 0115 const std::vector<Vector3> references(const GeometryContext& gctx, 0116 const Surface& surface) const override; 0117 0118 /// Access the type of the reference generator 0119 ReferenceGeneratorType type() const override { 0120 return ReferenceGeneratorType::Polyhedron; 0121 } 0122 }; 0123 0124 /// A Projected reference generator which projects the polyhedron vertices onto 0125 /// a given reference surface. 0126 /// 0127 struct ProjectedReferenceGenerator : public IReferenceGenerator { 0128 /// The reference surface onto which to project 0129 std::shared_ptr<Surface> referenceSurface = nullptr; 0130 0131 /// @brief The number of segments for the polyhedron approximation 0132 int nSegements = 1; 0133 0134 /// Absolute expansion value for the reference points 0135 double expansionValue = 0.0; 0136 0137 /// Luminous region sampling points for the projection - beam spot 0138 std::vector<Vector3> luminousRegion = {Vector3(0., 0., -200.), 0139 Vector3(0., 0., 200.0)}; 0140 0141 /// Helper to access the Center point of for filling the grid 0142 /// 0143 /// @param gctx the geometry context of this operation 0144 /// @param surface the surface for which the reference point is to be accessed 0145 /// 0146 /// @return a vector of reference points for filling 0147 const std::vector<Vector3> references(const GeometryContext& gctx, 0148 const Surface& surface) const override; 0149 0150 /// Access the type of the reference generator 0151 ReferenceGeneratorType type() const override { 0152 return ReferenceGeneratorType::Projected; 0153 } 0154 }; 0155 0156 } // namespace Acts::Experimental::detail
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