Fixed game crashes due to invalid vertex IDs

Author: Xottab-DUTY

src/xrAICore/Navigation/graph_engine_inline.h

@@ -37,6 +37,12 @@ template <typename _Graph, typename _Parameters>
 inline bool CGraphEngine::search(const _Graph& graph, const _index_type& start_node, const _index_type& dest_node,
     xr_vector<_index_type>* node_path, const _Parameters& parameters)
 {
+    const auto& level_graph = GEnv.AISpace->level_graph();
+    const bool vertices_valid = level_graph.valid_vertex_id(start_node) && level_graph.valid_vertex_id(dest_node);
+    VERIFY2(vertices_valid, make_string("start_node: %u, dest_node: %u", start_node, dest_node));
+    if (!vertices_valid)
+        return false;
+
     //ScopeLock scope(&m_lock);
     START_PROFILE("graph_engine")
     START_PROFILE("graph_engine/search")

src/xrGame/CustomMonster.cpp

@@ -745,11 +745,16 @@ bool CCustomMonster::net_Spawn(CSE_Abstract* DC)
         else
         {
             Fvector dest_position;
-            u32 level_vertex_id;
-            level_vertex_id = movement().restrictions().accessible_nearest(
-                ai().level_graph().vertex_position(ai_location().level_vertex_id()), dest_position);
-            movement().set_level_dest_vertex(level_vertex_id);
-            movement().detail().set_dest_position(dest_position);
+            const Fvector vertex_pos = ai().level_graph().vertex_position(ai_location().level_vertex_id());
+            const u32 level_vertex_id = movement().restrictions().accessible_nearest(vertex_pos, dest_position);
+
+            const bool vertex_id_is_valid = ai().game_graph().valid_vertex_id(level_vertex_id);
+            VERIFY(vertex_id_is_valid);
+            if (vertex_id_is_valid)
+            {
+                movement().set_level_dest_vertex(level_vertex_id);
+                movement().detail().set_dest_position(dest_position);
+            }
         }
     }