Add support for masking navmesh agents in NavMeshBoundsVolume

Source/Engine/Navigation/NavMeshBoundsVolume.h

@@ -3,6 +3,7 @@
 #pragma once
 
 #include "Engine/Level/Actors/BoxVolume.h"
+#include "NavigationTypes.h"
 
 /// <summary>
 /// A special type of volume that defines the areas of the scene in which navigation meshes are generated.
@@ -10,6 +11,20 @@
 API_CLASS() class FLAXENGINE_API NavMeshBoundsVolume : public BoxVolume
 {
 DECLARE_SCENE_OBJECT(NavMeshBoundsVolume);
+public:
+
+    /// <summary>
+    /// The agent types used by this navmesh bounds volume (from navigation settings). Can be used to generate navmesh for a certain set of agents.
+    /// </summary>
+    API_FIELD(Attributes="EditorDisplay(\"Box Volume\"), EditorOrder(10)")
+    NavAgentMask AgentsMask;
+
+public:
+
+    // [BoxVolume]
+    void Serialize(SerializeStream& stream, const void* otherObj) override;
+    void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) override;
+
 protected:
 
     // [BoxVolume]