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 // This file is part of the ACTS project.
 //
 // Copyright (C) 2016 CERN for the benefit of the ACTS project
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 #include "Acts/Detector/DetectorVolume.hpp"
 
 #include "Acts/Definitions/Direction.hpp"
 #include "Acts/Detector/Portal.hpp"
 #include "Acts/Geometry/Polyhedron.hpp"
 #include "Acts/Geometry/VolumeBounds.hpp"
 #include "Acts/Navigation/DetectorVolumeFinders.hpp"
 #include "Acts/Navigation/NavigationState.hpp"
 #include "Acts/Navigation/PortalNavigation.hpp"
 #include "Acts/Surfaces/Surface.hpp"
 #include "Acts/Utilities/Delegate.hpp"
 #include "Acts/Utilities/Enumerate.hpp"
 
 #include <cassert>
 #include <iterator>
 
 namespace Acts {
 class IVolumeMaterial;
 }  // namespace Acts
 
 Acts::Experimental::DetectorVolume::DetectorVolume(
     const GeometryContext& gctx, std::string name, const Transform3& transform,
     std::shared_ptr<VolumeBounds> bounds,
     std::vector<std::shared_ptr<Surface>> surfaces,
     std::vector<std::shared_ptr<DetectorVolume>> volumes,
     ExternalNavigationDelegate externalNavigation,
     InternalNavigationDelegate internalNavigation)
     : m_name(std::move(name)),
       m_transform(transform),
       m_bounds(std::move(bounds)),
       m_surfaces(std::move(surfaces)),
       m_volumes(std::move(volumes)),
       m_externalNavigation(std::move(externalNavigation)),
       m_internalNavigation(std::move(internalNavigation)),
       m_volumeMaterial(nullptr) {
   if (m_bounds == nullptr) {
     throw std::invalid_argument(
         "DetectorVolume: construction with nullptr bounds.");
   }
   if (!m_externalNavigation.connected()) {
     throw std::invalid_argument(
         "DetectorVolume: external navigation delegate is not connected.");
   }
   if (!m_internalNavigation.connected()) {
     throw std::invalid_argument(
         "DetectorVolume: internal navigaiton delegate is not connected.");
   }
 
   [[maybe_unused]] const auto& gctx_ref = gctx;
 }
 
 Acts::Experimental::DetectorVolume::DetectorVolume(
     const GeometryContext& gctx, std::string name, const Transform3& transform,
     std::shared_ptr<VolumeBounds> bounds,
     InternalNavigationDelegate internalNavigation)
     : DetectorVolume(gctx, std::move(name), transform, std::move(bounds), {},
                      {}, tryNoVolumes(), std::move(internalNavigation)) {}
 
 std::shared_ptr<Acts::Experimental::DetectorVolume>
 Acts::Experimental::DetectorVolume::makeShared(
     const GeometryContext& gctx, std::string name, const Transform3& transform,
     std::shared_ptr<VolumeBounds> bounds,
     std::vector<std::shared_ptr<Surface>> surfaces,
     std::vector<std::shared_ptr<DetectorVolume>> volumes,
     ExternalNavigationDelegate externalNavigation,
     InternalNavigationDelegate internalNavigation) {
   return std::shared_ptr<DetectorVolume>(new DetectorVolume(
       gctx, std::move(name), transform, std::move(bounds), std::move(surfaces),
       std::move(volumes), std::move(externalNavigation),
       std::move(internalNavigation)));
 }
 
 std::shared_ptr<Acts::Experimental::DetectorVolume>
 Acts::Experimental::DetectorVolume::makeShared(
     const GeometryContext& gctx, std::string name, const Transform3& transform,
     std::shared_ptr<VolumeBounds> bounds,
     InternalNavigationDelegate internalNavigation) {
   return std::shared_ptr<DetectorVolume>(
       new DetectorVolume(gctx, std::move(name), transform, std::move(bounds),
                          std::move(internalNavigation)));
 }
 
 const Acts::Transform3& Acts::Experimental::DetectorVolume::transform(
     const GeometryContext& /*gctx*/) const {
   return m_transform;
 }
 
 Acts::Vector3 Acts::Experimental::DetectorVolume::center(
     const GeometryContext& gctx) const {
   return transform(gctx).translation();
 }
 
 const Acts::VolumeBounds& Acts::Experimental::DetectorVolume::volumeBounds()
     const {
   return (*m_bounds.get());
 }
 
 std::vector<std::shared_ptr<Acts::Experimental::Portal>>&
 Acts::Experimental::DetectorVolume::portalPtrs() {
   return m_portals.internal;
 }
 
 std::vector<std::shared_ptr<Acts::Surface>>&
 Acts::Experimental::DetectorVolume::surfacePtrs() {
   return m_surfaces.internal;
 }
 
 std::vector<std::shared_ptr<Acts::Experimental::DetectorVolume>>&
 Acts::Experimental::DetectorVolume::volumePtrs() {
   return m_volumes.internal;
 }
 
 const std::vector<const Acts::Experimental::Portal*>&
 Acts::Experimental::DetectorVolume::portals() const {
   return m_portals.external;
 }
 
 const std::vector<const Acts::Surface*>&
 Acts::Experimental::DetectorVolume::surfaces() const {
   return m_surfaces.external;
 }
 
 const std::vector<const Acts::Experimental::DetectorVolume*>&
 Acts::Experimental::DetectorVolume::volumes() const {
   return m_volumes.external;
 }
 
 const Acts::Experimental::ExternalNavigationDelegate&
 Acts::Experimental::DetectorVolume::externalNavigation() const {
   return m_externalNavigation;
 }
 
 const Acts::Experimental::InternalNavigationDelegate&
 Acts::Experimental::DetectorVolume::internalNavigation() const {
   return m_internalNavigation;
 }
 
 void Acts::Experimental::DetectorVolume::assignVolumeMaterial(
     std::shared_ptr<const IVolumeMaterial> material) {
   m_volumeMaterial = std::move(material);
 }
 
 const Acts::IVolumeMaterial*
 Acts::Experimental::DetectorVolume::volumeMaterial() const {
   return m_volumeMaterial.get();
 }
 
 const Acts::GeometryIdentifier& Acts::Experimental::DetectorVolume::geometryId()
     const {
   return m_geometryId;
 }
 
 void Acts::Experimental::DetectorVolume::assignGeometryId(
     const GeometryIdentifier& geoID) {
   m_geometryId = geoID;
 }
 
 const std::string& Acts::Experimental::DetectorVolume::name() const {
   return m_name;
 }
 
 void Acts::Experimental::DetectorVolume::assignDetector(
     const Detector& detector) {
   m_detector = &detector;
 
   for (auto& v : m_volumes.internal) {
     v->assignDetector(detector);
   }
 }
 
 const Acts::Experimental::Detector*
 Acts::Experimental::DetectorVolume::detector() const {
   return m_detector;
 }
 
 void Acts::Experimental::DetectorVolume::updatePortal(
     std::shared_ptr<Portal> portal, unsigned int pIndex) {
   if (pIndex >= m_portals.internal.size()) {
     throw std::invalid_argument(
         "DetectorVolume: trying to update a portal that does not exist.");
   }
   m_portals.internal[pIndex] = std::move(portal);
   m_portals = ObjectStore<std::shared_ptr<Portal>>(m_portals.internal);
 }
 
 void Acts::Experimental::DetectorVolume::construct(
     const GeometryContext& gctx, const PortalGenerator& portalGenerator) {
   // Create portals with the given generator
   auto portalSurfaces =
       portalGenerator(transform(gctx), *(m_bounds.get()), getSharedPtr());
   m_portals = ObjectStore<std::shared_ptr<Portal>>(portalSurfaces);
   createBoundingBox(gctx);
 }
 
 std::shared_ptr<Acts::Experimental::DetectorVolume>
 Acts::Experimental::DetectorVolume::getSharedPtr() {
   return shared_from_this();
 }
 
 std::shared_ptr<const Acts::Experimental::DetectorVolume>
 Acts::Experimental::DetectorVolume::getSharedPtr() const {
   return shared_from_this();
 }
 
 bool Acts::Experimental::DetectorVolume::inside(const GeometryContext& gctx,
                                                 const Vector3& position) const {
   Vector3 posInVolFrame(transform(gctx).inverse() * position);
   return volumeBounds().inside(posInVolFrame);
 }
 
 bool Acts::Experimental::DetectorVolume::exclusivelyInside(
     const GeometryContext& gctx, const Vector3& position) const {
   if (!inside(gctx, position)) {
     return false;
   }
   // Check exclusion through subvolume
   for (const auto& v : volumes()) {
     if (v->inside(gctx, position)) {
       return false;
     }
   }
   return true;
 }
 
 void Acts::Experimental::DetectorVolume::updateNavigationState(
     const GeometryContext& gctx, NavigationState& nState) const {
   nState.currentVolume = this;
   m_internalNavigation(gctx, nState);
   nState.surfaceCandidateIndex = 0;
 }
 
 void Acts::Experimental::DetectorVolume::assignInternalNavigation(
     InternalNavigationDelegate internalNavigation,
     const std::vector<std::shared_ptr<Surface>>& surfaces,
     const std::vector<std::shared_ptr<DetectorVolume>>& volumes) {
   m_internalNavigation = std::move(internalNavigation);
   m_surfaces = ObjectStore<std::shared_ptr<Surface>>(surfaces);
   m_volumes = ObjectStore<std::shared_ptr<DetectorVolume>>(volumes);
 }
 
 Acts::Extent Acts::Experimental::DetectorVolume::extent(
     const GeometryContext& gctx, std::size_t nseg) const {
   Extent volumeExtent;
   for (const auto* p : portals()) {
     volumeExtent.extend(
         p->surface().polyhedronRepresentation(gctx, nseg).extent());
   }
   return volumeExtent;
 }
 
 bool Acts::Experimental::DetectorVolume::checkContainment(
     const GeometryContext& gctx, std::size_t nseg) const {
   // We don't have a logging instance here
   // so can't throw a warning for shapes that are
   // using the bounding box
   auto binningValues = volumeBounds().canonicalAxes();
 
   // Create the volume extent
   auto volumeExtent = extent(gctx, nseg);
   // Check surfaces
   for (auto b : binningValues) {
     for (const auto* s : surfaces()) {
       auto sExtent = s->polyhedronRepresentation(gctx, nseg).extent();
       if (!volumeExtent.contains(sExtent, b)) {
         return false;
       }
     }
     // Check volumes
     for (const auto* v : volumes()) {
       auto vExtent = v->extent(gctx, nseg);
       if (!volumeExtent.contains(vExtent, b)) {
         return false;
       }
     }
   }
   // All contained
   return true;
 }
 
 void Acts::Experimental::DetectorVolume::closePortals() {
   for (auto& p : m_portals.internal) {
     // Create a null link
     for (auto [ivu, vu] : enumerate(p->portalNavigation())) {
       if (!vu.connected()) {
         auto eowDir = Direction::fromIndex(ivu);
         auto eow = std::make_unique<const EndOfWorld>();
         Acts::Experimental::ExternalNavigationDelegate eowLink;
         eowLink.connect<&EndOfWorld::update>(std::move(eow));
         p->assignPortalNavigation(eowDir, std::move(eowLink), {});
       }
     }
   }
 
   for (auto& v : m_volumes.internal) {
     v->closePortals();
   }
 }
 
 void Acts::Experimental::DetectorVolume::createBoundingBox(
     const GeometryContext& gctx) {
   std::vector<Vector3> vertices;
   for (auto p : m_portals.external) {
     auto surface = p->surface().polyhedronRepresentation(gctx, 1);
     auto pVertices = surface.vertices;
     for (const auto& v : pVertices) {
       vertices.push_back(v);
     }
   }
   Acts::Vector3 vmin = Acts::Vector3::Zero();
   Acts::Vector3 vmax = Acts::Vector3::Zero();
   for (const auto& v : vertices) {
     vmin = vmin.cwiseMin(v);
     vmax = vmax.cwiseMax(v);
   }
   std::shared_ptr<Acts::Experimental::DetectorVolume::BoundingBox> box =
       std::make_shared<Acts::Experimental::DetectorVolume::BoundingBox>(
           this, vmin, vmax);
   m_boundingBox = box;
 }
 
 const Acts::Experimental::DetectorVolume::BoundingBox&
 Acts::Experimental::DetectorVolume::getBoundingBox() const {
   return *m_boundingBox;
 }

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