Put detector in navigator_state

core/include/detray/propagator/navigator.hpp

@@ -109,16 +109,27 @@ class navigator {
             typename vector_type<intersection_type>::const_iterator;
 
         public:
+        using detector_type = navigator::detector_type;
+
         /// Default constructor
         state() = default;
 
+        state(const detector_type &det) : _detector(&det) {}
+
         /// Constructor with memory resource
         DETRAY_HOST
-        state(vecmem::memory_resource &resource) : _candidates(&resource) {}
+        state(const detector_type &det, vecmem::memory_resource &resource)
+            : _detector(&det), _candidates(&resource) {}
 
         /// Constructor from candidates vector_view
-        DETRAY_HOST_DEVICE state(vector_type<intersection_type> candidates)
-            : _candidates(candidates) {}
+        DETRAY_HOST_DEVICE state(const detector_type &det,
+                                 vector_type<intersection_type> candidates)
+            : _detector(&det), _candidates(candidates) {}
+
+        /// Scalar representation of the navigation state,
+        /// @returns distance to next
+        DETRAY_HOST_DEVICE
+        auto detector() const { return _detector; }
 
         /// Scalar representation of the navigation state,
         /// @returns distance to next
@@ -357,6 +368,9 @@ class navigator {
         /// Heartbeat of this navigation flow signals navigation is alive
         bool _heartbeat = false;
 
+        /// Detector pointer
+        const detector_type *const _detector;
+
         /// Our cache of candidates (intersections with any kind of surface)
         vector_type<intersection_type> _candidates = {};
 
@@ -387,16 +401,6 @@ class navigator {
         dindex _volume_index = 0;
     };
 
-    /// Constructor from detector object, which is not owned by the navigator
-    /// and needs to be guaranteed to have a lifetime beyond that of the
-    /// navigator
-    DETRAY_HOST_DEVICE
-    navigator(const detector_t &d) : _detector(&d) {}
-
-    /// @returns reference to the detector
-    DETRAY_HOST_DEVICE
-    const detector_t &get_detector() const { return *_detector; }
-
     /// Helper method to initialize a volume.
     ///
     /// Calls the volumes accelerator structure for local navigation, then tests
@@ -410,8 +414,9 @@ class navigator {
     DETRAY_HOST_DEVICE inline bool init(propagator_state_t &propagation) const {
 
         state &navigation = propagation._navigation;
+        const auto &det = navigation.detector();
         const auto &track = propagation._stepping();
-        const auto &volume = _detector->volume_by_index(navigation.volume());
+        const auto &volume = det->volume_by_index(navigation.volume());
 
         // Clean up state
         navigation.clear();
@@ -421,11 +426,10 @@ class navigator {
 
         // Loop over all indexed objects in volume, intersect and fill
         // @todo - will come from the local object finder
-        const auto &tf_store = _detector->transform_store();
-        const auto &mask_store = _detector->mask_store();
+        const auto &tf_store = det->transform_store();
+        const auto &mask_store = det->mask_store();
 
-        for (const auto [obj_idx, obj] :
-             enumerate(_detector->surfaces(), volume)) {
+        for (const auto [obj_idx, obj] : enumerate(det->surfaces(), volume)) {
 
             std::size_t count =
                 mask_store.template execute<intersection_initialize>(
@@ -526,6 +530,7 @@ class navigator {
         propagator_state_t &propagation) const {
 
         state &navigation = propagation._navigation;
+        const auto &det = navigation.detector();
         const auto &track = propagation._stepping();
 
         // Current candidates are up to date, nothing left to do
@@ -539,7 +544,7 @@ class navigator {
             navigation.n_candidates() == 1) {
 
             // Update next candidate: If not reachable, 'high trust' is broken
-            if (not update_candidate(*navigation.next(), track)) {
+            if (not update_candidate(*navigation.next(), track, det)) {
                 navigation.set_state(navigation::status::e_unknown,
                                      dindex_invalid,
                                      navigation::trust_level::e_no_trust);
@@ -565,7 +570,7 @@ class navigator {
 
             // Else: Track is on module.
             // Ready the next candidate after the current module
-            if (update_candidate(*navigation.next(), track)) {
+            if (update_candidate(*navigation.next(), track, det)) {
                 return;
             }
 
@@ -581,7 +586,7 @@ class navigator {
 
             for (auto &candidate : navigation.candidates()) {
                 // Disregard this candidate if it is not reachable
-                if (not update_candidate(candidate, track)) {
+                if (not update_candidate(candidate, track, det)) {
                     // Forcefully set dist to numeric max for sorting
                     candidate.path = std::numeric_limits<scalar>::max();
                 }
@@ -671,15 +676,15 @@ class navigator {
     /// @returns whether the track can reach this candidate.
     template <typename track_t>
     DETRAY_HOST_DEVICE inline bool update_candidate(
-        intersection_type &candidate, const track_t &track) const {
+        intersection_type &candidate, const track_t &track,
+        const detector_type *det) const {
         // Remember the surface this candidate belongs to
         const dindex obj_idx = candidate.index;
 
-        const auto &mask_store = _detector->mask_store();
-        const auto &sf = _detector->surface_by_index(obj_idx);
+        const auto &mask_store = det->mask_store();
+        const auto &sf = det->surface_by_index(obj_idx);
         candidate = mask_store.template execute<intersection_update>(
-            sf.mask_type(), detail::ray(track), sf,
-            _detector->transform_store());
+            sf.mask_type(), detail::ray(track), sf, det->transform_store());
 
         candidate.index = obj_idx;
         // Check whether this candidate is reachable by the track
@@ -702,9 +707,6 @@ class navigator {
         return detail::find_if(candidates.begin(), candidates.end(),
                                not_reachable);
     }
-
-    /// the containers for all data
-    const detector_t *const _detector;
 };
 
 /// @return the vecmem jagged vector buffer for surface candidates

core/include/detray/propagator/propagator.hpp

@@ -59,20 +59,22 @@ struct propagator {
         /// @param candidates buffer for intersections in the navigator
         DETRAY_HOST_DEVICE state(
             const free_track_parameters_type &t_in,
+            const typename navigator_t::detector_type &det,
             typename actor_chain_t::state actor_states = {},
             vector_type<line_plane_intersection> &&candidates = {})
             : _stepping(t_in),
-              _navigation(std::move(candidates)),
+              _navigation(det, std::move(candidates)),
               _actor_states(actor_states) {}
 
         /// Construct the propagation state with bound parameter
         DETRAY_HOST_DEVICE state(
             const bound_track_parameters_type &param,
-            const transform3_type &trf3,
+            const typename stepper_t::transform3_type &trf3,
+            const typename navigator_t::detector_type &det,
             typename actor_chain_t::state actor_states = {},
             vector_type<line_plane_intersection> &&candidates = {})
             : _stepping(param, trf3),
-              _navigation(std::move(candidates)),
+              _navigation(det, std::move(candidates)),
               _actor_states(actor_states) {}
 
         // Is the propagation still alive?

tests/benchmarks/cuda/benchmark_propagator_cuda.cpp

@@ -56,7 +56,7 @@ static void BM_PROPAGATOR_CPU(benchmark::State &state) {
     rk_stepper_type s(B_field);
 
     // Create navigator
-    navigator_host_type n(det);
+    navigator_host_type n;
 
     // Create propagator
     propagator_host_type p(std::move(s), std::move(n));
@@ -75,7 +75,7 @@ static void BM_PROPAGATOR_CPU(benchmark::State &state) {
         for (auto &track : tracks) {
 
             // Create the propagator state
-            propagator_host_type::state p_state(track);
+            propagator_host_type::state p_state(track, det);
 
             // Run propagation
             p.propagate(p_state);

tests/benchmarks/cuda/benchmark_propagator_cuda_kernel.cu

@@ -34,14 +34,14 @@ __global__ void propagator_benchmark_kernel(
     rk_stepper_type s(B_field);
 
     // Create navigator
-    navigator_device_type n(det);
+    navigator_device_type n;
 
     // Create propagator
     propagator_device_type p(std::move(s), std::move(n));
 
     // Create the propagator state
     propagator_device_type::state p_state(
-        tracks.at(gid), actor_chain<>::state{}, candidates.at(gid));
+        tracks.at(gid), det, actor_chain<>::state{}, candidates.at(gid));
 
     // Run propagation
     p.propagate(p_state);

tests/common/include/tests/common/check_geometry_navigation.inl

@@ -56,7 +56,7 @@ TEST(ALGEBRA_PLUGIN, straight_line_navigation) {
     using propagator_t = propagator<stepper_t, navigator_t, actor_chain<>>;
 
     // Propagator
-    propagator_t prop(stepper_t{}, navigator_t{det});
+    propagator_t prop(stepper_t{}, navigator_t{});
 
     constexpr std::size_t theta_steps{50};
     constexpr std::size_t phi_steps{50};
@@ -75,7 +75,7 @@ TEST(ALGEBRA_PLUGIN, straight_line_navigation) {
         // Now follow that ray with a track and check, if we find the same
         // volumes and distances along the way
         free_track_parameters_type track(ray.pos(), 0, ray.dir(), -1);
-        propagator_t::state propagation(track);
+        propagator_t::state propagation(track, det);
 
         // Retrieve navigation information
         auto &inspector = propagation._navigation.inspector();
@@ -141,7 +141,7 @@ TEST(ALGEBRA_PLUGIN, helix_navigation) {
     const vector3 B{0. * unit_constants::T, 0. * unit_constants::T,
                     2. * unit_constants::T};
     b_field_t b_field(B);
-    propagator_t prop(stepper_t{b_field}, navigator_t{det});
+    propagator_t prop(stepper_t{b_field}, navigator_t{});
 
     constexpr std::size_t theta_steps{10};
     constexpr std::size_t phi_steps{10};
@@ -168,7 +168,7 @@ TEST(ALGEBRA_PLUGIN, helix_navigation) {
 
         // Now follow that helix with the same track and check, if we find
         // the same volumes and distances along the way
-        propagator_t::state propagation(track);
+        propagator_t::state propagation(track, det);
 
         // Retrieve navigation information
         auto &inspector = propagation._navigation.inspector();

tests/common/include/tests/common/test_telescope_detector.inl

@@ -34,7 +34,9 @@ struct prop_state {
     navigation_t _navigation;
 
     template <typename track_t>
-    prop_state(const track_t &t_in) : _stepping(t_in) {}
+    prop_state(const track_t &t_in,
+               const typename navigation_t::detector_type &det)
+        : _stepping(t_in), _navigation(det) {}
 };
 
 }  // anonymous namespace
@@ -119,18 +121,19 @@ TEST(ALGEBRA_PLUGIN, telescope_detector) {
     free_track_parameters<transform3> test_track_x(pos, 0, mom, -1);
 
     // navigators
-    navigator<decltype(z_tel_det1), inspector_t> navigator_z1(z_tel_det1);
-    navigator<decltype(z_tel_det2), inspector_t> navigator_z2(z_tel_det2);
-    navigator<decltype(x_tel_det), inspector_t> navigator_x(x_tel_det);
+    navigator<decltype(z_tel_det1), inspector_t> navigator_z1;
+    navigator<decltype(z_tel_det2), inspector_t> navigator_z2;
+    navigator<decltype(x_tel_det), inspector_t> navigator_x;
     using navigation_state_t = decltype(navigator_z1)::state;
     using stepping_state_t = rk_stepper_t::state;
 
     // propagation states
     prop_state<stepping_state_t, navigation_state_t> propgation_z1(
-        test_track_z1);
+        test_track_z1, z_tel_det1);
     prop_state<stepping_state_t, navigation_state_t> propgation_z2(
-        test_track_z2);
-    prop_state<stepping_state_t, navigation_state_t> propgation_x(test_track_x);
+        test_track_z2, z_tel_det2);
+    prop_state<stepping_state_t, navigation_state_t> propgation_x(test_track_x,
+                                                                  x_tel_det);
 
     stepping_state_t &stepping_z1 = propgation_z1._stepping;
     stepping_state_t &stepping_z2 = propgation_z2._stepping;
@@ -201,10 +204,10 @@ TEST(ALGEBRA_PLUGIN, telescope_detector) {
         host_mr, n_surfaces, tel_length, pilot_track, rk_stepper_z);
 
     // make at least sure it is navigatable
-    navigator<decltype(tel_detector), inspector_t> tel_navigator(tel_detector);
+    navigator<decltype(tel_detector), inspector_t> tel_navigator;
 
     prop_state<stepping_state_t, navigation_state_t> tel_propagation(
-        pilot_track);
+        pilot_track, tel_detector);
     navigation_state_t &tel_navigation = tel_propagation._navigation;
 
     // run propagation

tests/common/include/tests/common/tools_guided_navigator.inl

@@ -64,9 +64,8 @@ TEST(ALGEBRA_PLUGIN, guided_navigator) {
     pathlimit_aborter::state pathlimit{200. * unit_constants::cm};
 
     // Propagator
-    propagator_t p(runge_kutta_stepper{b_field},
-                   guided_navigator{telescope_det});
-    propagator_t::state guided_state(track, std::tie(pathlimit));
+    propagator_t p(runge_kutta_stepper{b_field}, guided_navigator{});
+    propagator_t::state guided_state(track, telescope_det, std::tie(pathlimit));
 
     // Propagate
     p.propagate(guided_state);

tests/common/include/tests/common/tools_navigator.inl

@@ -130,10 +130,10 @@ TEST(ALGEBRA_PLUGIN, navigator) {
     free_track_parameters<transform3> traj(pos, 0, mom, -1);
 
     stepper_t stepper;
-    navigator_t nav(toy_det);
+    navigator_t nav;
 
     prop_state<stepper_t::state, navigator_t::state> propagation{
-        stepper_t::state{traj}, navigator_t::state{}};
+        stepper_t::state{traj}, navigator_t::state(toy_det, host_mr)};
     navigator_t::state &navigation = propagation._navigation;
     stepper_t::state &stepping = propagation._stepping;
 

tests/common/include/tests/common/tools_propagator.inl

@@ -91,9 +91,9 @@ TEST(ALGEBRA_PLUGIN, propagator_line_stepper) {
     const vector3 mom{1., 1., 0.};
     free_track_parameters<transform3> track(pos, 0, mom, -1);
 
-    propagator_t p(stepper_t{}, navigator_t{d});
+    propagator_t p(stepper_t{}, navigator_t{});
 
-    propagator_t::state state(track);
+    propagator_t::state state(track, d);
 
     EXPECT_TRUE(p.propagate(state))
         << state._navigation.inspector().to_string() << std::endl;
@@ -142,7 +142,7 @@ TEST_P(PropagatorWithRkStepper, propagator_rk_stepper) {
     const b_field_t b_field(B);
 
     // Propagator is built from the stepper and navigator
-    propagator_t p(stepper_t{b_field}, navigator_t{d});
+    propagator_t p(stepper_t{b_field}, navigator_t{});
 
     // Iterate through uniformly distributed momentum directions
     for (auto track :
@@ -167,8 +167,8 @@ TEST_P(PropagatorWithRkStepper, propagator_rk_stepper) {
             helix_insp_state, lim_print_insp_state, pathlimit_aborter_state);
 
         // Init propagator states
-        propagator_t::state state(track, actor_states);
-        propagator_t::state lim_state(lim_track, lim_actor_states);
+        propagator_t::state state(track, d, actor_states);
+        propagator_t::state lim_state(lim_track, d, lim_actor_states);
 
         // Set step constraints
         state._stepping.template set_constraint<step::constraint::e_accuracy>(

tests/unit_tests/cuda/navigator_cuda.cpp

@@ -29,7 +29,7 @@ TEST(navigator_cuda, navigator) {
                                                    n_edc_layers);
 
     // Create navigator
-    navigator_host_t nav(det);
+    navigator_host_t nav;
 
     // Create the vector of initial track parameters
     vecmem::vector<free_track_parameters<transform3>> tracks_host(&mng_mr);
@@ -63,7 +63,7 @@ TEST(navigator_cuda, navigator) {
         stepper_t stepper;
 
         prop_state<navigator_host_t::state> propagation{
-            stepper_t::state{track}, navigator_host_t::state{mng_mr}};
+            stepper_t::state{track}, navigator_host_t::state(det, mng_mr)};
 
         navigator_host_t::state& navigation = propagation._navigation;
         stepper_t::state& stepping = propagation._stepping;

tests/unit_tests/cuda/navigator_cuda_kernel.cu

@@ -31,13 +31,14 @@ __global__ void navigator_test_kernel(
         return;
     }
 
-    navigator_device_t nav(det);
+    navigator_device_t nav;
 
     auto& traj = tracks.at(gid);
     stepper_t stepper;
 
     prop_state<navigator_device_t::state> propagation{
-        stepper_t::state{traj}, navigator_device_t::state{candidates.at(gid)}};
+        stepper_t::state{traj},
+        navigator_device_t::state(det, candidates.at(gid))};
 
     navigator_device_t::state& navigation = propagation._navigation;
     stepper_t::state& stepping = propagation._stepping;