Plugins/TGeo/TGeoBBoxConversionTests.cpp

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 #include <boost/test/unit_test.hpp>
0010
0011 #include "Acts/Definitions/Algebra.hpp"
0012 #include "Acts/Definitions/Tolerance.hpp"
0013 #include "Acts/Geometry/GeometryContext.hpp"
0014 #include "Acts/Plugins/TGeo/TGeoSurfaceConverter.hpp"
0015 #include "Acts/Surfaces/RectangleBounds.hpp"
0016 #include "Acts/Surfaces/Surface.hpp"
0017 #include "Acts/Surfaces/SurfaceBounds.hpp"
0018 #include "Acts/Tests/CommonHelpers/FloatComparisons.hpp"
0019 #include "Acts/Visualization/GeometryView3D.hpp"
0020 #include "Acts/Visualization/ObjVisualization3D.hpp"
0021 #include "Acts/Visualization/ViewConfig.hpp"
0022
0023 #include <memory>
0024 #include <utility>
0025
0026 #include "TGeoBBox.h"
0027 #include "TGeoManager.h"
0028 #include "TGeoMaterial.h"
0029 #include "TGeoMatrix.h"
0030 #include "TGeoMedium.h"
0031 #include "TGeoVolume.h"
0032 #include "TView.h"
0033
0034 namespace Acts::Test {
0035
0036 GeometryContext tgContext = GeometryContext();
0037
0038 ViewConfig red{.color = {200, 0, 0}};
0039 ViewConfig green{.color = {0, 200, 0}};
0040 ViewConfig blue{.color = {0, 0, 200}};
0041
0042 /// @brief Unit test to convert a Bbox into a Plane
0043 ///
0044 /// This test also tests:
0045 /// * the "(x/X)(y/Y)(z/Z)" orientations
0046 /// * the scaling functionality
0047 BOOST_AUTO_TEST_CASE(TGeoBBox_to_PlaneSurface) {
0048   ObjVisualization3D objVis;
0049
0050   // BBox is defined [-dX,dX] x [-dY,dY] x [-dZ,dZ]
0051   double dX = 10.;
0052   double dY = 30.;
0053   double dZ = 1.;
0054
0055   new TGeoManager("box", "poza1");
0056   TGeoMaterial *mat = new TGeoMaterial("Al", 26.98, 13, 2.7);
0057   TGeoMedium *med = new TGeoMedium("MED", 1, mat);
0058   TGeoVolume *top = gGeoManager->MakeBox("TOP", med, 100, 100, 100);
0059   gGeoManager->SetTopVolume(top);
0060   TGeoVolume *vol = gGeoManager->MakeBox("BOX", med, dX, dY, dZ);
0061   vol->SetLineWidth(2);
0062   top->AddNode(vol, 1);
0063   gGeoManager->CloseGeometry();
0064
0065   // Upper case ---------------------------------
0066   auto [plane_XYZ, thickness_XYZ] = TGeoSurfaceConverter::toSurface(
0067       *vol->GetShape(), *gGeoIdentity, "XY*", 1);
0068   BOOST_REQUIRE_NE(plane_XYZ, nullptr);
0069   BOOST_CHECK_EQUAL(plane_XYZ->type(), Surface::Plane);
0070   CHECK_CLOSE_ABS(thickness_XYZ, 2 * dZ, s_epsilon);
0071
0072   auto bounds_XYZ =
0073       dynamic_cast<const RectangleBounds *>(&(plane_XYZ->bounds()));
0074   BOOST_REQUIRE_NE(bounds_XYZ, nullptr);
0075   double maxX = bounds_XYZ->get(RectangleBounds::eMaxX);
0076   double minX = bounds_XYZ->get(RectangleBounds::eMinX);
0077   double maxY = bounds_XYZ->get(RectangleBounds::eMaxY);
0078   double minY = bounds_XYZ->get(RectangleBounds::eMinY);
0079   CHECK_CLOSE_ABS(maxX - minX, 2 * dX, s_epsilon);
0080   CHECK_CLOSE_ABS(maxY - minY, 2 * dY, s_epsilon);
0081
0082   // Check if the surface is the (negative) identity
0083   auto transform_XYZ = plane_XYZ->transform(tgContext);
0084   auto rotation_XYZ = transform_XYZ.rotation();
0085   BOOST_CHECK(transform_XYZ.isApprox(Transform3::Identity()));
0086
0087   const Vector3 offset_XYZ{-5.5 * dX, 0., 0.};
0088   GeometryView3D::drawSurface(objVis, *plane_XYZ, tgContext,
0089                               Transform3(Translation3{offset_XYZ}));
0090   const Vector3 center_XYZ = plane_XYZ->center(tgContext) + offset_XYZ;
0091   GeometryView3D::drawArrowForward(
0092       objVis, center_XYZ,
0093       center_XYZ + 0.6 * (maxX - minX) * rotation_XYZ.col(0), 4., 2.5, red);
0094   GeometryView3D::drawArrowForward(
0095       objVis, center_XYZ,
0096       center_XYZ + 0.6 * (maxY - minY) * rotation_XYZ.col(1), 4., 2.5, green);
0097   GeometryView3D::drawArrowForward(
0098       objVis, center_XYZ, center_XYZ + 2 * rotation_XYZ.col(2), 4., 2.5, blue);
0099
0100   // Lower case ---------------------------------
0101   auto [plane_xyz, thickness_xyz] = TGeoSurfaceConverter::toSurface(
0102       *vol->GetShape(), *gGeoIdentity, "xy*", 1);
0103   BOOST_CHECK_NE(plane_xyz, nullptr);
0104   BOOST_CHECK_EQUAL(plane_xyz->type(), Surface::Plane);
0105   CHECK_CLOSE_ABS(thickness_xyz, 2 * dZ, s_epsilon);
0106
0107   auto bounds_xyz =
0108       dynamic_cast<const RectangleBounds *>(&(plane_XYZ->bounds()));
0109   BOOST_REQUIRE_NE(bounds_xyz, nullptr);
0110   BOOST_CHECK_EQUAL(bounds_xyz, bounds_XYZ);
0111   auto transform_xyz = plane_xyz->transform(tgContext);
0112   auto rotation_xyz = transform_xyz.rotation();
0113   BOOST_CHECK(rotation_xyz.col(0).isApprox(-1 * rotation_XYZ.col(0)));
0114   BOOST_CHECK(rotation_xyz.col(1).isApprox(-1 * rotation_XYZ.col(1)));
0115   BOOST_CHECK(rotation_xyz.col(2).isApprox(rotation_XYZ.col(2)));
0116
0117   const Vector3 offset_xyz{-2 * dX, 0., 0.};
0118   GeometryView3D::drawSurface(objVis, *plane_xyz, tgContext,
0119                               Transform3(Translation3{offset_xyz}));
0120   const Vector3 center_xyz = plane_xyz->center(tgContext) + offset_xyz;
0121   GeometryView3D::drawArrowForward(
0122       objVis, center_xyz,
0123       center_xyz + 0.6 * (maxX - minX) * rotation_xyz.col(0), 4., 2.5, red);
0124   GeometryView3D::drawArrowForward(
0125       objVis, center_xyz,
0126       center_xyz + 0.6 * (maxY - minY) * rotation_xyz.col(1), 4., 2.5, green);
0127   GeometryView3D::drawArrowForward(
0128       objVis, center_xyz, center_xyz + 2 * rotation_xyz.col(2), 4., 2.5, blue);
0129
0130   // Mixed case ---------------------------------
0131   auto [plane_xYz, thickness_xYz] = TGeoSurfaceConverter::toSurface(
0132       *vol->GetShape(), *gGeoIdentity, "xY*", 1);
0133   BOOST_REQUIRE_NE(plane_xYz, nullptr);
0134   BOOST_CHECK_EQUAL(plane_xYz->type(), Surface::Plane);
0135   CHECK_CLOSE_ABS(thickness_xYz, 2 * dZ, s_epsilon);
0136
0137   auto bounds_xYz =
0138       dynamic_cast<const RectangleBounds *>(&(plane_xYz->bounds()));
0139   BOOST_CHECK_NE(bounds_xYz, nullptr);
0140   BOOST_CHECK_EQUAL(bounds_xYz, bounds_xYz);
0141   auto transform_xYz = plane_xYz->transform(tgContext);
0142   auto rotation_xYz = transform_xYz.rotation();
0143   BOOST_CHECK(rotation_xYz.col(0).isApprox(-1 * rotation_XYZ.col(0)));
0144   BOOST_CHECK(rotation_xYz.col(1).isApprox(rotation_XYZ.col(1)));
0145   BOOST_CHECK(rotation_xYz.col(2).isApprox(-1. * rotation_XYZ.col(2)));
0146
0147   const Vector3 offset_xYz{2 * dX, 0., 0.};
0148   GeometryView3D::drawSurface(
0149       objVis, *plane_xYz, tgContext,
0150       Translation3{offset_xYz} * Transform3::Identity());
0151   const Vector3 center_xYz = plane_xYz->center(tgContext) + offset_xYz;
0152   GeometryView3D::drawArrowForward(
0153       objVis, center_xYz,
0154       center_xYz + 0.6 * (maxX - minX) * rotation_xYz.col(0), 4., 2.5, red);
0155   GeometryView3D::drawArrowForward(
0156       objVis, center_xYz,
0157       center_xYz + 0.6 * (maxY - minY) * rotation_xYz.col(1), 4., 2.5, green);
0158   GeometryView3D::drawArrowForward(
0159       objVis, center_xYz, center_xYz + 2 * rotation_xYz.col(2), 4., 2.5, blue);
0160
0161   // Swap case --------------------------------- (x/y) here
0162   auto [plane_YXz, thickness_YXz] = TGeoSurfaceConverter::toSurface(
0163       *vol->GetShape(), *gGeoIdentity, "YX*", 1);
0164   BOOST_REQUIRE_NE(plane_YXz, nullptr);
0165   BOOST_CHECK_EQUAL(plane_YXz->type(), Surface::Plane);
0166   CHECK_CLOSE_ABS(thickness_YXz, 2 * dZ, s_epsilon);
0167
0168   auto bounds_YXz =
0169       dynamic_cast<const RectangleBounds *>(&(plane_YXz->bounds()));
0170   maxX = bounds_YXz->get(RectangleBounds::eMaxX);
0171   minX = bounds_YXz->get(RectangleBounds::eMinX);
0172   maxY = bounds_YXz->get(RectangleBounds::eMaxY);
0173   minY = bounds_YXz->get(RectangleBounds::eMinY);
0174   CHECK_CLOSE_ABS(maxX - minX, 2 * dY, s_epsilon);
0175   CHECK_CLOSE_ABS(maxY - minY, 2 * dX, s_epsilon);
0176
0177   auto transform_YXz = plane_YXz->transform(tgContext);
0178   auto rotation_YXz = transform_YXz.rotation();
0179   BOOST_CHECK(rotation_YXz.col(0).isApprox(rotation_XYZ.col(1)));
0180   BOOST_CHECK(rotation_YXz.col(1).isApprox(rotation_XYZ.col(0)));
0181   BOOST_CHECK(rotation_YXz.col(2).isApprox(-1. * rotation_XYZ.col(2)));
0182
0183   const Vector3 offset_YXz{5.5 * dX, 0., 0.};
0184   GeometryView3D::drawSurface(objVis, *plane_YXz, tgContext,
0185                               Transform3(Translation3{offset_YXz}));
0186   const Vector3 center_YXz = plane_YXz->center(tgContext) + offset_YXz;
0187   GeometryView3D::drawArrowForward(
0188       objVis, center_YXz,
0189       center_YXz + 0.6 * (maxX - minX) * rotation_YXz.col(0), 4., 2.5, red);
0190   GeometryView3D::drawArrowForward(
0191       objVis, center_YXz,
0192       center_YXz + 0.6 * (maxY - minY) * rotation_YXz.col(1), 4., 2.5, green);
0193   GeometryView3D::drawArrowForward(
0194       objVis, center_YXz, center_YXz + 2 * rotation_YXz.col(2), 4., 2.5, blue);
0195
0196   // Scaling test ---------------------------------
0197   auto [plane_XYZ10, thickness_XYZ10] = TGeoSurfaceConverter::toSurface(
0198       *vol->GetShape(), *gGeoIdentity, "xY*", 10);
0199   BOOST_CHECK_NE(plane_XYZ10, nullptr);
0200   CHECK_CLOSE_ABS(thickness_XYZ10, 20 * dZ, s_epsilon);
0201
0202   auto bounds_XYZ10 =
0203       dynamic_cast<const RectangleBounds *>(&(plane_XYZ10->bounds()));
0204   double maxX10 = bounds_XYZ10->get(RectangleBounds::eMaxX);
0205   double minX10 = bounds_XYZ10->get(RectangleBounds::eMinX);
0206   double maxY10 = bounds_XYZ10->get(RectangleBounds::eMaxY);
0207   double minY10 = bounds_XYZ10->get(RectangleBounds::eMinY);
0208   CHECK_CLOSE_ABS(maxX10 - minX10, 20 * dX, s_epsilon);
0209   CHECK_CLOSE_ABS(maxY10 - minY10, 20 * dY, s_epsilon);
0210
0211   objVis.write("TGeoConversion_TGeoBBox_PlaneSurface");
0212 }
0213
0214 }  // namespace Acts::Test