Add SceneNavigation for scene data for navigation system

Source/Engine/Level/Scene/SceneNavigation.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Collections/Array.h"
+
+class NavMesh;
+class NavMeshBoundsVolume;
+
+/// <summary>
+/// Scene navigation subsystem.
+/// </summary>
+class FLAXENGINE_API SceneNavigation
+{
+public:
+
+    /// <summary>
+    /// The list of registered navigation bounds volumes (on the scene).
+    /// </summary>
+    Array<NavMeshBoundsVolume*> Volumes;
+
+    /// <summary>
+    /// The list of registered navigation meshes (on the scene).
+    /// </summary>
+    Array<NavMesh*> Meshes;
+
+    /// <summary>
+    /// Gets the total navigation volumes bounds.
+    /// </summary>
+    BoundingBox GetNavigationBounds();
+
+    /// <summary>
+    /// Finds the navigation volume bounds that have intersection with the given world-space bounding box.
+    /// </summary>
+    /// <param name="bounds">The bounds.</param>
+    /// <returns>The intersecting volume or null if none found.</returns>
+    NavMeshBoundsVolume* FindNavigationBoundsOverlap(const BoundingBox& bounds);
+};