Add support for dynamic updating navmesh when moving NavModifierVolume

Source/Engine/Navigation/NavModifierVolume.cpp

@@ -2,12 +2,12 @@
 
 #include "NavModifierVolume.h"
 #include "NavigationSettings.h"
+#include "NavMeshBuilder.h"
 #include "Engine/Level/Scene/Scene.h"
 #include "Engine/Serialization/Serialization.h"
 #if USE_EDITOR
 #include "Editor/Editor.h"
 #include "Editor/Managed/ManagedEditor.h"
-#include "NavMeshBuilder.h"
 #endif
 
 NavModifierVolume::NavModifierVolume(const SpawnParams& params)
@@ -47,19 +47,35 @@ void NavModifierVolume::Deserialize(DeserializeStream& stream, ISerializeModifie
     DESERIALIZE(AreaName);
 }
 
-#if USE_EDITOR
-
 void NavModifierVolume::OnBoundsChanged(const BoundingBox& prevBounds)
 {
+#if COMPILE_WITH_NAV_MESH_BUILDER
     // Auto-rebuild modified navmesh area
-    if (IsDuringPlay() && IsActiveInHierarchy() && !Editor::IsPlayMode && Editor::Managed->CanAutoBuildNavMesh())
+    if (
+        IsDuringPlay() && IsActiveInHierarchy() && HasStaticFlag(StaticFlags::Navigation) &&
+        (
+            // Build at runtime for dynamic modifiers
+            !HasStaticFlag(StaticFlags::Transform)
+#if USE_EDITOR
+            // Build in editor when using auto-rebuild option
+            || (!Editor::IsPlayMode && Editor::Managed->CanAutoBuildNavMesh())
+#endif
+        ))
     {
         BoundingBox dirtyBounds;
         BoundingBox::Merge(prevBounds, _box, dirtyBounds);
-        NavMeshBuilder::Build(GetScene(), dirtyBounds, ManagedEditor::ManagedEditorOptions.AutoRebuildNavMeshTimeoutMs);
+#if USE_EDITOR
+        const float timeoutMs = ManagedEditor::ManagedEditorOptions.AutoRebuildNavMeshTimeoutMs;
+#else
+        const float timeoutMs = 0.0f;
+#endif
+        NavMeshBuilder::Build(GetScene(), dirtyBounds, timeoutMs);
     }
+#endif
 }
 
+#if USE_EDITOR
+
 Color NavModifierVolume::GetWiresColor()
 {
     return Color::Red;

Source/Engine/Navigation/NavModifierVolume.h

@@ -41,8 +41,8 @@ public:
 protected:
 
     // [BoxVolume]
-#if USE_EDITOR
     void OnBoundsChanged(const BoundingBox& prevBounds) override;
+#if USE_EDITOR
     Color GetWiresColor() override;
 #endif
 };