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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 0014 #include <string> 0015 0016 #include <DD4hep/DetFactoryHelper.h> 0017 #include <DD4hep/Objects.h> 0018 #include <DDRec/DetectorData.h> 0019 #include <XML/Utilities.h> 0020 0021 using namespace dd4hep; 0022 0023 namespace Acts { 0024 class Surface; 0025 } // namespace Acts 0026 0027 namespace DD4hepTestsHelper { 0028 0029 /// @brief helper to ensure that an extension is set, 0030 /// copied from the ODD detector code 0031 /// 0032 /// @tparam T the type of the extension 0033 /// @param elt the detector element 0034 /// @return the extracted/created extennsion 0035 template <typename T> 0036 T& ensureExtension(dd4hep::DetElement& elt) { 0037 T* ext = elt.extension<T>(false); 0038 if (ext == nullptr) { 0039 ext = new T(); 0040 } 0041 elt.addExtension<T>(ext); 0042 return *ext; 0043 } 0044 0045 /// Helper method to decode the binning from what would appear in the 0046 /// xml into variant parameters, such that it can be understood in the 0047 /// downstream processing. 0048 /// 0049 /// This parses the dediced \< surface_binning \> tag 0050 /// - allowed/understood binnings are x,y,z,phi,r 0051 /// - allowed/unserstood types are equidistant/variable (those are 0052 /// auto-detected) 0053 /// 0054 /// Example for e.g. bname = \"surface_binning\": 0055 /// 0056 /// - Equidistant binning in r and phi: 0057 /// \<acts_surface_binning nr=\"2\" rmin=\"25\" rmax=\"100\" nphi=\"22\" 0058 /// phimin=\"-3.1415\" phimax=\"3.1415\" \/ \> 0059 /// - Variable binning in z: 0060 /// \<acts_surface_binning zboundaries=\"-100,-90,90,100\" \/ \> 0061 /// 0062 /// And 2D combinations of this are allowed. 0063 /// 0064 /// @param variantParams [in,out] the variant parameters that will be overwritten 0065 /// @param xmlBinning the surface binning 0066 /// @param bname the binning base name, e.g. surface_binning, material_binning 0067 /// @param bvals the boundary values, i.e. x,y,z,phi,r 0068 /// 0069 void decodeBinning(dd4hep::rec::VariantParameters& variantParams, 0070 const xml_comp_t& xmlBinning, const std::string& bname, 0071 const std::vector<std::string>& bvals); 0072 0073 /// Helper method to create a Transform3D from an xml detector 0074 /// component 0075 /// 0076 /// @param x_det_comp the xml detector component 0077 /// 0078 /// @return a Transform3D (DD4hep type, aka ROOT::Math type) 0079 Transform3D createTransform(const xml_comp_t& x_det_comp); 0080 0081 /// Helper method to convert an ACTS transform into XML 0082 /// 0083 /// @param tf the transform in ACTS format 0084 /// @param axes the identification which axes are building the local frame 0085 /// 0086 /// @return a string representing the XML entry 0087 std::string transformToXML(const Acts::Transform3& tf, 0088 const std::array<int, 2u>& axes = {0, 1}); 0089 0090 /// @brief Helper method to convert a Surface into XML 0091 /// 0092 /// @param gctx the geometry context of this call 0093 /// @param surface the surface from ACTS to be written 0094 /// @param ref the reference transform 0095 /// 0096 /// @return a string representing the XML entry 0097 std::string surfaceToXML(const Acts::GeometryContext& gctx, 0098 const Acts::Surface& surface, 0099 const Acts::Transform3& ref); 0100 0101 } // namespace DD4hepTestsHelper
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