added events

source/pathfinding/navigation_mesh.cpp

@@ -5,6 +5,7 @@
 #include <algorithm>
 #include <sstream>
 #include <stdexcept>
+
 namespace omath::pathfinding
 {
     std::expected<Vector3<float>, std::string>
@@ -29,13 +30,40 @@ namespace omath::pathfinding
         return m_vertex_map.empty();
     }
 
+    void NavigationMesh::set_event(const Vector3<float>& vertex, std::string event_id)
+    {
+        m_vertex_events[vertex] = std::move(event_id);
+    }
+
+    void NavigationMesh::clear_event(const Vector3<float>& vertex)
+    {
+        m_vertex_events.erase(vertex);
+    }
+
+    std::optional<std::string> NavigationMesh::get_event(const Vector3<float>& vertex) const noexcept
+    {
+        const auto it = m_vertex_events.find(vertex);
+        if (it == m_vertex_events.end())
+            return std::nullopt;
+        return it->second;
+    }
+
+    // Serialization format per vertex line:
+    //   x y z neighbor_count event_id
+    // where event_id is "-" when no event is set.
+    // Neighbor lines follow: nx ny nz
+
     std::string NavigationMesh::serialize() const noexcept
     {
         std::ostringstream oss;
         for (const auto& [vertex, neighbors] : m_vertex_map)
         {
+            const auto event_it = m_vertex_events.find(vertex);
+            const std::string& event = (event_it != m_vertex_events.end()) ? event_it->second : "-";
+
             oss << vertex.x << ' ' << vertex.y << ' ' << vertex.z
-                << ' ' << neighbors.size() << '\n';
+                << ' ' << neighbors.size() << ' ' << event << '\n';
+
             for (const auto& n : neighbors)
                 oss << n.x << ' ' << n.y << ' ' << n.z << '\n';
         }
@@ -45,11 +73,13 @@ namespace omath::pathfinding
     void NavigationMesh::deserialize(const std::string& raw)
     {
         m_vertex_map.clear();
+        m_vertex_events.clear();
         std::istringstream iss(raw);
 
         Vector3<float> vertex;
         std::size_t neighbors_count;
-        while (iss >> vertex.x >> vertex.y >> vertex.z >> neighbors_count)
+        std::string event;
+        while (iss >> vertex.x >> vertex.y >> vertex.z >> neighbors_count >> event)
         {
             std::vector<Vector3<float>> neighbors;
             neighbors.reserve(neighbors_count);
@@ -61,6 +91,9 @@ namespace omath::pathfinding
                 neighbors.push_back(n);
             }
             m_vertex_map.emplace(vertex, std::move(neighbors));
+
+            if (event != "-")
+                m_vertex_events.emplace(vertex, std::move(event));
         }
     }
 } // namespace omath::pathfinding