EIC code displayed by LXR |
|
|
|
|||
File indexing completed on 2026-09-10 08:38:44
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/Definitions/Alignment.hpp" 0013 #include "Acts/Definitions/Direction.hpp" 0014 #include "Acts/Definitions/Tolerance.hpp" 0015 #include "Acts/Definitions/TrackParametrization.hpp" 0016 #include "Acts/Geometry/GeometryContext.hpp" 0017 #include "Acts/Geometry/GeometryObject.hpp" 0018 #include "Acts/Geometry/Polyhedron.hpp" 0019 #include "Acts/Material/MaterialSlab.hpp" 0020 #include "Acts/Surfaces/BoundaryTolerance.hpp" 0021 #include "Acts/Surfaces/SurfaceBounds.hpp" 0022 #include "Acts/Surfaces/SurfacePlacementBase.hpp" 0023 #include "Acts/Utilities/AxisDefinitions.hpp" 0024 #include "Acts/Utilities/CloneablePtr.hpp" 0025 #include "Acts/Utilities/Intersection.hpp" 0026 #include "Acts/Utilities/Result.hpp" 0027 #include "Acts/Visualization/ViewConfig.hpp" 0028 0029 #include <array> 0030 #include <memory> 0031 #include <ostream> 0032 #include <string> 0033 #include <string_view> 0034 #include <utility> 0035 0036 namespace Acts { 0037 0038 class SurfaceBounds; 0039 class ISurfaceMaterial; 0040 class Layer; 0041 class TrackingVolume; 0042 class IVisualization3D; 0043 0044 /// @class Surface 0045 /// 0046 /// Abstract Base Class for tracking surfaces 0047 /// 0048 /// The Surface class builds the core of the Acts Tracking Geometry. 0049 /// All other geometrical objects are either extending the surface or 0050 /// are built from it. 0051 /// 0052 /// Surfaces are either owned by Detector elements or the Tracking Geometry, 0053 /// in which case they are not copied within the data model objects. 0054 /// 0055 class Surface : public virtual GeometryObject, 0056 public std::enable_shared_from_this<Surface> { 0057 public: 0058 friend struct GeometryContextOstreamWrapper<Surface>; 0059 0060 /// @enum SurfaceType 0061 /// 0062 /// This enumerator simplifies the persistency & calculations, 0063 /// by saving a dynamic_cast, e.g. for persistency 0064 enum SurfaceType { 0065 Cone = 0, 0066 Cylinder = 1, 0067 Disc = 2, 0068 Perigee = 3, 0069 Plane = 4, 0070 Straw = 5, 0071 Curvilinear = 6, 0072 Other = 7 0073 }; 0074 0075 /// Helper strings for screen output 0076 static constexpr std::array<std::string_view, Surface::SurfaceType::Other + 1> 0077 s_surfaceTypeNames = {"Cone", "Cylinder", "Disc", "Perigee", 0078 "Plane", "Straw", "Curvilinear", "Other"}; 0079 0080 friend std::ostream& operator<<(std::ostream& os, SurfaceType type); 0081 0082 protected: 0083 /// Constructor with Transform3 as a shared object 0084 /// 0085 /// @param transform Transform3 positions the surface in 3D global space 0086 /// @note also acts as default constructor 0087 explicit Surface(const Transform3& transform = Transform3::Identity()); 0088 0089 /// Copy constructor 0090 /// 0091 /// @note copy construction invalidates the association 0092 /// to detector element and layer 0093 /// 0094 /// @param other Source surface for copy. 0095 Surface(const Surface& other) noexcept = default; 0096 0097 /// Constructor from SurfacePlacement: Element proxy 0098 /// 0099 /// @param placement Reference to the surface placement 0100 /// @note The Surface does not take any ownership over the 0101 /// `SurfacePlacementBase` it is expected that the user 0102 /// ensures the life-time of the `SurfacePlacementBase` 0103 /// and that the `Surface` is actually owned by 0104 /// the `SurfacePlacementBase` instance 0105 explicit Surface(const SurfacePlacementBase& placement) noexcept; 0106 0107 /// Copy constructor with optional shift 0108 /// 0109 /// @note copy construction invalidates the association 0110 /// to detector element and layer 0111 /// 0112 /// @param gctx The current geometry context object, e.g. alignment 0113 /// @param other Source surface for copy 0114 /// @param shift Additional transform applied as: shift * transform 0115 explicit Surface(const GeometryContext& gctx, const Surface& other, 0116 const Transform3& shift) noexcept; 0117 0118 public: 0119 ~Surface() noexcept override; 0120 0121 /// Factory for producing memory managed instances of Surface. 0122 /// Will forward all parameters and will attempt to find a suitable 0123 /// constructor. 0124 /// @param args Constructor arguments to forward to surface creation 0125 /// @return Shared pointer to the created surface instance 0126 template <class T, typename... Args> 0127 static std::shared_ptr<T> makeShared(Args&&... args) { 0128 return std::shared_ptr<T>(new T(std::forward<Args>(args)...)); 0129 } 0130 0131 /// Retrieve a @c std::shared_ptr for this surface (non-const version) 0132 /// 0133 /// @note Will error if this was not created through the @c makeShared factory 0134 /// since it needs access to the original reference. In C++14 this is 0135 /// undefined behavior (but most likely implemented as a @c bad_weak_ptr 0136 /// exception), in C++17 it is defined as that exception. 0137 /// @note Only call this if you need shared ownership of this object. 0138 /// 0139 /// @return The shared pointer 0140 std::shared_ptr<Surface> getSharedPtr(); 0141 0142 /// Retrieve a @c std::shared_ptr for this surface (const version) 0143 /// 0144 /// @note Will error if this was not created through the @c makeShared factory 0145 /// since it needs access to the original reference. In C++14 this is 0146 /// undefined behavior, but most likely implemented as a @c bad_weak_ptr 0147 /// exception, in C++17 it is defined as that exception. 0148 /// @note Only call this if you need shared ownership of this object. 0149 /// 0150 /// @return The shared pointer 0151 std::shared_ptr<const Surface> getSharedPtr() const; 0152 0153 /// Assignment operator 0154 /// @note copy construction invalidates the association 0155 /// to detector element and layer 0156 /// 0157 /// @param other Source surface for the assignment 0158 /// @return Reference to this surface after assignment 0159 Surface& operator=(const Surface& other) noexcept = default; 0160 0161 /// Comparison (equality) operator 0162 /// The strategy for comparison is 0163 /// (a) first pointer comparison 0164 /// (b) then type comparison 0165 /// (c) then bounds comparison 0166 /// (d) then transform comparison 0167 /// 0168 /// @param other source surface for the comparison 0169 /// @return True if surfaces are equal, false otherwise 0170 bool operator==(const Surface& other) const; 0171 0172 public: 0173 /// Return method for the Surface type to avoid dynamic casts 0174 /// @return The surface type enumeration value 0175 virtual SurfaceType type() const = 0; 0176 0177 /// Return method for the surface Transform3 by reference 0178 /// In case a detector element is associated the surface transform 0179 /// is just forwarded to the detector element in order to keep the 0180 /// (mis-)alignment cache cetrally handled 0181 /// 0182 /// @param gctx The current geometry context object, e.g. alignment 0183 /// 0184 /// @return the contextual transform 0185 const Transform3& localToGlobalTransform(const GeometryContext& gctx) const; 0186 0187 /// Return method for the surface center 0188 /// @note the center is always recalculated in order to not keep a cache 0189 /// 0190 /// @param gctx The current geometry context object, e.g. alignment 0191 /// 0192 /// @return center position by value 0193 virtual Vector3 center(const GeometryContext& gctx) const; 0194 0195 /// Return the surface normal at a given @p position and @p direction. 0196 /// This method is fully generic, and valid for all surface types. 0197 /// @note For some surface types, the @p direction is ignored, but 0198 /// it is **not safe** to pass in a zero vector! 0199 /// @param gctx The current geometry context object, e.g. alignment 0200 /// @param pos The position at which to calculate the normal 0201 /// @param direction The direction at which to calculate the normal 0202 /// @return The normal vector at the given position and direction 0203 virtual Vector3 normal(const GeometryContext& gctx, const Vector3& pos, 0204 const Vector3& direction) const = 0; 0205 0206 /// Return method for SurfaceBounds 0207 /// @return SurfaceBounds by reference 0208 virtual const SurfaceBounds& bounds() const = 0; 0209 0210 /// Return the associated surface placement if there is any 0211 /// @return Pointer to the surface placement, can be nullptr 0212 const SurfacePlacementBase* surfacePlacement() const; 0213 0214 /// Return method for the associated Layer in which the surface is embedded 0215 /// @return Layer by plain pointer, can be nullptr 0216 const Layer* associatedLayer() const; 0217 0218 /// Return the thickness of the surface in the normal direction 0219 /// @return The surface thickness 0220 double thickness() const; 0221 0222 /// Set Associated Layer 0223 /// Many surfaces can be associated to a Layer, but it might not be known yet 0224 /// during construction of the layer, this can be set afterwards 0225 /// 0226 /// @param lay the assignment Layer by reference 0227 void associateLayer(const Layer& lay); 0228 0229 /// Check if the surface has an associated material description 0230 /// @return True if the surface has an associated material, false otherwise 0231 bool hasMaterial() const; 0232 0233 /// Return method for the associated Material to this surface 0234 /// @return SurfaceMaterial as plain pointer, can be nullptr 0235 const ISurfaceMaterial* surfaceMaterial() const; 0236 0237 /// Return method for the shared pointer to the associated Material 0238 /// @return SurfaceMaterial as shared_pointer, can be nullptr 0239 const std::shared_ptr<const ISurfaceMaterial>& surfaceMaterialSharedPtr() 0240 const; 0241 0242 /// Assign a placement object which may dynamically align the surface in space 0243 /// @param placement: Placement object defining the surface's position 0244 void assignSurfacePlacement(const SurfacePlacementBase& placement); 0245 0246 /// Assign the surface material description 0247 /// 0248 /// The material is usually derived in a complicated way and loaded from 0249 /// a framework given source. As various surfaces may share the same source 0250 /// this is provided by a shared pointer 0251 /// 0252 /// @param material Material description associated to this surface 0253 virtual void assignSurfaceMaterial( 0254 std::shared_ptr<const ISurfaceMaterial> material); 0255 0256 /// Assign whether the surface is sensitive 0257 /// @param isSensitive Boolean flag to set sensitivity 0258 /// @throw logic_error if the surface is associated to a detector element 0259 void assignIsSensitive(bool isSensitive); 0260 0261 /// Assign the thickness of the surface in the 0262 /// orthogonal dimension 0263 /// @param thick: Thickness parameter to assign (>=0) 0264 void assignThickness(double thick); 0265 0266 /// Return method for full material description of the Surface 0267 /// - from local coordinate on the surface 0268 /// 0269 /// @param lp is the local position used for the (eventual) lookup 0270 /// 0271 /// @return const MaterialSlab 0272 virtual const MaterialSlab& materialSlab(const Vector2& lp) const; 0273 0274 /// Return method for fully scaled material description of the Surface 0275 /// - from local coordinate on the surface 0276 /// 0277 /// @param lp is the local position used for the (eventual) lookup 0278 /// @param pDir is the positive direction through the surface 0279 /// @param mode is the material update directive 0280 /// 0281 /// @return MaterialSlab 0282 virtual MaterialSlab materialSlab(const Vector2& lp, Direction pDir, 0283 MaterialUpdateMode mode) const; 0284 0285 /// The geometric onSurface method 0286 /// 0287 /// Geometrical check whether position is on Surface 0288 /// 0289 /// @param gctx The current geometry context object, e.g. alignment 0290 /// @param position global position to be evaludated 0291 /// @param direction global momentum direction (required for line-type surfaces) 0292 /// @param boundaryTolerance BoundaryTolerance directive for this onSurface check 0293 /// @param tolerance optional tolerance within which a point is considered on surface 0294 /// 0295 /// @return boolean indication if operation was successful 0296 bool isOnSurface( 0297 const GeometryContext& gctx, const Vector3& position, 0298 const Vector3& direction, 0299 const BoundaryTolerance& boundaryTolerance = BoundaryTolerance::None(), 0300 double tolerance = s_onSurfaceTolerance) const; 0301 0302 /// Calculates the closest point on the boundary of the surface to a given 0303 /// point in local coordinates. 0304 /// @param lposition The local position to check 0305 /// @param metric The metric to use for the calculation 0306 /// @return The closest point on the boundary of the surface 0307 virtual Vector2 closestPointOnBoundary(const Vector2& lposition, 0308 const SquareMatrix2& metric) const; 0309 0310 /// Calculates the distance to the boundary of the surface from a given point 0311 /// in local coordinates. 0312 /// @param lposition The local position to check 0313 /// @return The distance to the boundary of the surface 0314 virtual double distanceToBoundary(const Vector2& lposition) const; 0315 0316 /// The insideBounds method for local positions 0317 /// 0318 /// @param lposition The local position to check 0319 /// @param boundaryTolerance BoundaryTolerance directive for this onSurface check 0320 /// @return boolean indication if operation was successful 0321 virtual bool insideBounds(const Vector2& lposition, 0322 const BoundaryTolerance& boundaryTolerance = 0323 BoundaryTolerance::None()) const; 0324 0325 /// Local to global transformation 0326 /// Generalized local to global transformation for the surface types. Since 0327 /// some surface types need the global momentum/direction to resolve sign 0328 /// ambiguity this is also provided 0329 /// 0330 /// @param gctx The current geometry context object, e.g. alignment 0331 /// @param lposition local 2D position in specialized surface frame 0332 /// @param direction global 3D momentum direction 0333 /// 0334 /// @return The global position by value 0335 virtual Vector3 localToGlobal(const GeometryContext& gctx, 0336 const Vector2& lposition, 0337 const Vector3& direction) const = 0; 0338 0339 /// Global to local transformation 0340 /// Generalized global to local transformation for the surface types. Since 0341 /// some surface types need the global momentum/direction to resolve sign 0342 /// ambiguity this is also provided 0343 /// 0344 /// @param gctx The current geometry context object, e.g. alignment 0345 /// @param position global 3D position - considered to be on surface but not 0346 /// inside bounds (check is done) 0347 /// @param direction global 3D momentum direction 0348 /// @param tolerance optional tolerance within which a point is considered 0349 /// valid on surface 0350 /// 0351 /// @return a Result<Vector2> which can be !ok() if the operation fails 0352 virtual Result<Vector2> globalToLocal( 0353 const GeometryContext& gctx, const Vector3& position, 0354 const Vector3& direction, 0355 double tolerance = s_onSurfaceTolerance) const = 0; 0356 0357 /// Return method for the reference frame 0358 /// This is the frame in which the covariance matrix is defined (specialized 0359 /// by all surfaces) 0360 /// 0361 /// @param gctx The current geometry context object, e.g. alignment 0362 /// @param position global 3D position - considered to be on surface but not 0363 /// inside bounds (check is done) 0364 /// @param direction global 3D momentum direction (optionally ignored) 0365 /// 0366 /// @return RotationMatrix3 which defines the three axes of the measurement 0367 /// frame 0368 virtual RotationMatrix3 referenceFrame(const GeometryContext& gctx, 0369 const Vector3& position, 0370 const Vector3& direction) const; 0371 0372 /// Calculate the jacobian from local to global which the surface knows best, 0373 /// hence the calculation is done here. 0374 /// 0375 /// @note In principle, the input could also be a free parameters 0376 /// vector as it could be transformed to a bound parameters. But the transform 0377 /// might fail in case the parameters is not on surface. To avoid the check 0378 /// inside this function, it takes directly the bound parameters as input 0379 /// (then the check might be done where this function is called). 0380 /// 0381 /// @todo this mixes track parameterisation and geometry 0382 /// should move to : 0383 /// "Acts/EventData/detail/coordinate_transformations.hpp" 0384 /// 0385 /// @param gctx The current geometry context object, e.g. alignment 0386 /// @param position global 3D position 0387 /// @param direction global 3D momentum direction 0388 /// 0389 /// @return Jacobian from local to global 0390 virtual BoundToFreeMatrix boundToFreeJacobian(const GeometryContext& gctx, 0391 const Vector3& position, 0392 const Vector3& direction) const; 0393 0394 /// Calculate the jacobian from global to local which the surface knows best, 0395 /// hence the calculation is done here. 0396 /// 0397 /// @note It assumes the input free parameters is on surface, hence no 0398 /// onSurface check is done inside this function. 0399 /// 0400 /// @todo this mixes track parameterisation and geometry 0401 /// should move to : 0402 /// "Acts/EventData/detail/coordinate_transformations.hpp" 0403 /// 0404 /// @param gctx The current geometry context object, e.g. alignment 0405 /// @param position global 3D position 0406 /// @param direction global 3D momentum direction 0407 /// 0408 /// @return Jacobian from global to local 0409 virtual FreeToBoundMatrix freeToBoundJacobian(const GeometryContext& gctx, 0410 const Vector3& position, 0411 const Vector3& direction) const; 0412 0413 /// Calculate the derivative of path length at the geometry constraint or 0414 /// point-of-closest-approach w.r.t. free parameters. The calculation is 0415 /// identical for all surfaces where the reference frame does not depend on 0416 /// the direction 0417 /// 0418 /// @todo this mixes track parameterisation and geometry 0419 /// should move to : 0420 /// "Acts/EventData/detail/coordinate_transformations.hpp" 0421 /// 0422 /// @param gctx The current geometry context object, e.g. alignment 0423 /// @param position global 3D position 0424 /// @param direction global 3D momentum direction 0425 /// 0426 /// @return Derivative of path length w.r.t. free parameters 0427 virtual FreeToPathMatrix freeToPathDerivative(const GeometryContext& gctx, 0428 const Vector3& position, 0429 const Vector3& direction) const; 0430 0431 /// Calculation of the path correction for incident 0432 /// 0433 /// @param gctx The current geometry context object, e.g. alignment 0434 /// @param position global 3D position 0435 /// @note The @p position is either ignored, or it is coerced to be on the surface, 0436 /// depending on the surface type. 0437 /// @param direction global 3D momentum direction 0438 /// 0439 /// @return Path correction with respect to the nominal incident. 0440 virtual double pathCorrection(const GeometryContext& gctx, 0441 const Vector3& position, 0442 const Vector3& direction) const = 0; 0443 0444 /// Straight line intersection schema from position/direction 0445 /// 0446 /// @param gctx The current geometry context object, e.g. alignment 0447 /// @param position The position to start from 0448 /// @param direction The direction at start 0449 /// @param boundaryTolerance the BoundaryTolerance 0450 /// @param tolerance the tolerance used for the intersection 0451 /// 0452 /// @return @c MultiIntersection3D intersection object 0453 virtual MultiIntersection3D intersect( 0454 const GeometryContext& gctx, const Vector3& position, 0455 const Vector3& direction, 0456 const BoundaryTolerance& boundaryTolerance = 0457 BoundaryTolerance::Infinite(), 0458 double tolerance = s_onSurfaceTolerance) const = 0; 0459 0460 /// Helper method for printing: the returned object captures the 0461 /// surface and the geometry context and will print the surface 0462 /// @param gctx The current geometry context object, e.g. alignment 0463 /// @return The wrapper object for printing 0464 GeometryContextOstreamWrapper<Surface> toStream( 0465 const GeometryContext& gctx) const { 0466 return {*this, gctx}; 0467 } 0468 0469 /// Output into a std::string 0470 /// 0471 /// @param gctx The current geometry context object, e.g. alignment 0472 /// @return String representation of the surface 0473 std::string toString(const GeometryContext& gctx) const; 0474 0475 /// Return properly formatted class name 0476 /// @return The surface class name as a string 0477 virtual std::string name() const = 0; 0478 0479 /// Returns whether the Surface is sensitive 0480 /// @return True if the surface is sensitive 0481 bool isSensitive() const; 0482 0483 /// Returns whether the Surface is alignable 0484 /// @return True if the surface is alignable 0485 bool isAlignable() const; 0486 0487 /// Return a Polyhedron for surface objects 0488 /// 0489 /// @param gctx The current geometry context object, e.g. alignment 0490 /// @param quarterSegments The number of segemtns to approximate a 0.5*pi sector, 0491 /// which represents a quarter of the full circle 0492 /// 0493 /// @note In order to symmetrize the code between sectoral and closed cylinders 0494 /// in case of closed cylinders, both (-pi, pi) are given as separate vertices 0495 /// 0496 /// @note An internal surface transform can invalidate the extrema 0497 /// in the transformed space 0498 /// 0499 /// @return A list of vertices and a face/facett description of it 0500 virtual Polyhedron polyhedronRepresentation( 0501 const GeometryContext& gctx, unsigned int quarterSegments = 2u) const = 0; 0502 0503 /// The derivative of bound track parameters w.r.t. alignment 0504 /// parameters of its reference surface (i.e. local frame origin in 0505 /// global 3D Cartesian coordinates and its rotation represented with 0506 /// extrinsic Euler angles) 0507 /// 0508 /// @param gctx The current geometry context object, e.g. alignment 0509 /// change of alignment parameters 0510 /// @param position global 3D position 0511 /// @param direction global 3D momentum direction 0512 /// @param pathDerivative is the derivative of free parameters w.r.t. path 0513 /// length 0514 /// 0515 /// @return Derivative of bound track parameters w.r.t. local frame 0516 /// alignment parameters 0517 AlignmentToBoundMatrix alignmentToBoundDerivative( 0518 const GeometryContext& gctx, const Vector3& position, 0519 const Vector3& direction, const FreeVector& pathDerivative) const; 0520 0521 /// Calculate the derivative of path length at the geometry constraint or 0522 /// point-of-closest-approach w.r.t. alignment parameters of the surface (i.e. 0523 /// local frame origin in global 3D Cartesian coordinates and its rotation 0524 /// represented with extrinsic Euler angles) 0525 /// 0526 /// @note Re-implementation is needed for surface whose intersection with 0527 /// track is not its local xy plane, e.g. LineSurface, CylinderSurface and 0528 /// ConeSurface 0529 /// 0530 /// @param gctx The current geometry context object, e.g. alignment 0531 /// @param position global 3D position 0532 /// @param direction global 3D momentum direction 0533 /// 0534 /// @return Derivative of path length w.r.t. the alignment parameters 0535 virtual AlignmentToPathMatrix alignmentToPathDerivative( 0536 const GeometryContext& gctx, const Vector3& position, 0537 const Vector3& direction) const; 0538 0539 /// Calculate the derivative of bound track parameters local position w.r.t. 0540 /// position in local 3D Cartesian coordinates 0541 /// 0542 /// @param gctx The current geometry context object, e.g. alignment 0543 /// @param position The position of the parameters in global 0544 /// 0545 /// @return Derivative of bound local position w.r.t. position in local 3D 0546 /// cartesian coordinates 0547 virtual Matrix<2, 3> localCartesianToBoundLocalDerivative( 0548 const GeometryContext& gctx, const Vector3& position) const = 0; 0549 0550 /// Visualize the surface for debugging and inspection 0551 /// @param helper Visualization helper for 3D rendering 0552 /// @param gctx Geometry context for coordinate transformations 0553 /// @param viewConfig Visual configuration (color, style, etc.) 0554 void visualize(IVisualization3D& helper, const GeometryContext& gctx, 0555 const ViewConfig& viewConfig = s_viewSurface) const; 0556 0557 protected: 0558 /// Output Method for std::ostream, to be overloaded by child classes 0559 /// 0560 /// @param gctx The current geometry context object, e.g. alignment 0561 /// @param sl is the ostream to be dumped into 0562 /// @return Reference to the output stream for chaining 0563 virtual std::ostream& toStreamImpl(const GeometryContext& gctx, 0564 std::ostream& sl) const; 0565 0566 /// Local axes of the surface 0567 /// @return An array of local axes directions 0568 virtual std::array<AxisDirection, 2> localAxes() const = 0; 0569 0570 /// Transform surface local coordinates to material local coordinates 0571 /// @param surfaceLocal The local coordinates on the surface 0572 /// @return The corresponding local coordinates for material lookup 0573 virtual Vector2 transformSurfaceLocalToMaterialLocal( 0574 const Vector2& surfaceLocal) const; 0575 0576 /// Transform3 definition that positions 0577 /// (translation, rotation) the surface in global space 0578 CloneablePtr<const Transform3> m_transform; 0579 0580 /// Possibility to attach a material description 0581 std::shared_ptr<const ISurfaceMaterial> m_surfaceMaterial; 0582 0583 /// Whether to swap the local coordinates for material lookup 0584 bool m_swapMaterialAxes{false}; 0585 0586 private: 0587 /// Pointer to the a SurfacePlacement 0588 const SurfacePlacementBase* m_placement{nullptr}; 0589 0590 /// The associated layer Layer - layer in which the Surface is be embedded, 0591 /// nullptr if not associated 0592 const Layer* m_associatedLayer{nullptr}; 0593 0594 /// Flag to indicate whether the surface is sensitive 0595 bool m_isSensitive{false}; 0596 0597 /// Thickness of the surface in the normal direction 0598 double m_thickness{0.}; 0599 0600 /// Calculate the derivative of bound track parameters w.r.t. 0601 /// alignment parameters of its reference surface (i.e. origin in global 3D 0602 /// Cartesian coordinates and its rotation represented with extrinsic Euler 0603 /// angles) without any path correction 0604 /// 0605 /// @note This function should be used together with alignment to path 0606 /// derivative to get the full alignment to bound derivatives 0607 /// 0608 /// @param gctx The current geometry context object, e.g. alignment 0609 /// @param position global 3D position 0610 /// @param direction global 3D momentum direction 0611 /// 0612 /// @return Derivative of bound track parameters w.r.t. local frame alignment 0613 /// parameters without path correction 0614 AlignmentToBoundMatrix alignmentToBoundDerivativeWithoutCorrection( 0615 const GeometryContext& gctx, const Vector3& position, 0616 const Vector3& direction) const; 0617 }; 0618 0619 } // namespace Acts
| [ Source navigation ] | [ Diff markup ] | [ Identifier search ] | [ general search ] |
|
This page was automatically generated by the 2.3.7 LXR engine. The LXR team |
|