From 16fdcb55daf85b2e9cca6f0f43c3eee1b264cb8d Mon Sep 17 00:00:00 2001
From: "j.foucher" <j.foucher@polymorph.fr>
Date: Tue, 14 Apr 2026 20:07:22 +0200
Subject: [PATCH] Debounced SplineNetwork rebuild on spline point changes

- ScheduleNetworkRebuild() called after AddPoint, RemovePoint, SetAllPointLocations
- 0.5s debounce timer avoids redundant rebuilds during rapid editing
- AI NPCs now detect and follow splines placed in the editor immediately

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 .../PS_BehaviorEditor_AISpline.cpp            | 23 ++++++++++++++++++-
 .../PS_BehaviorEditor_AISpline.h              |  4 ++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.cpp b/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.cpp
index dc44621..0867066 100644
--- a/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.cpp
+++ b/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.cpp
@@ -124,11 +124,30 @@ void APS_BehaviorEditor_AISpline::BeginPlay()
 
 // ---- Point manipulation ----
 
+void APS_BehaviorEditor_AISpline::ScheduleNetworkRebuild()
+{
+	if (UWorld* World = GetWorld())
+	{
+		World->GetTimerManager().ClearTimer(NetworkRebuildTimer);
+		World->GetTimerManager().SetTimer(NetworkRebuildTimer, [WeakWorld = TWeakObjectPtr<UWorld>(World)]()
+		{
+			if (UWorld* W = WeakWorld.Get())
+			{
+				if (UPS_AI_Behavior_SplineNetwork* Network = W->GetSubsystem<UPS_AI_Behavior_SplineNetwork>())
+				{
+					Network->RebuildNetwork();
+				}
+			}
+		}, 0.5f, false);
+	}
+}
+
 void APS_BehaviorEditor_AISpline::AddPoint(const FVector& WorldPosition)
 {
 	SplineComp->AddSplinePoint(WorldPosition, ESplineCoordinateSpace::World, true);
 	PointHandles.Add(CreatePointHandle(WorldPosition));
 	UpdateVisualization();
+	ScheduleNetworkRebuild();
 }
 
 void APS_BehaviorEditor_AISpline::MovePoint(int32 Index, const FVector& NewWorldPosition)
@@ -152,6 +171,7 @@ void APS_BehaviorEditor_AISpline::RemovePoint(int32 Index)
 		PointHandles.RemoveAt(Index);
 	}
 	UpdateVisualization();
+	ScheduleNetworkRebuild();
 }
 
 int32 APS_BehaviorEditor_AISpline::GetNumPoints() const
@@ -188,6 +208,7 @@ void APS_BehaviorEditor_AISpline::SetAllPointLocations(const TArray<FVector>& Po
 	SplineComp->UpdateSpline();
 	RebuildHandles();
 	UpdateVisualization();
+	ScheduleNetworkRebuild();
 }
 
 void APS_BehaviorEditor_AISpline::InsertPoint(int32 Index, const FVector& WorldPosition)
@@ -196,7 +217,7 @@ void APS_BehaviorEditor_AISpline::InsertPoint(int32 Index, const FVector& WorldP
 	Index = FMath::Clamp(Index, 0, GetNumPoints());
 	TArray<FVector> Points = GetAllPointLocations();
 	Points.Insert(WorldPosition, Index);
-	SetAllPointLocations(Points);
+	SetAllPointLocations(Points); // Already calls ScheduleNetworkRebuild
 }
 
 int32 APS_BehaviorEditor_AISpline::FindInsertIndex(const FVector& WorldLocation) const
diff --git a/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.h b/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.h
index 5105ae2..c69c696 100644
--- a/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.h
+++ b/Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.h
@@ -110,6 +110,10 @@ private:
 	UPROPERTY()
 	TObjectPtr<UMaterialInstanceDynamic> CenterCubeMat;
 
+	/** Schedule a debounced SplineNetwork rebuild. */
+	void ScheduleNetworkRebuild();
+	FTimerHandle NetworkRebuildTimer;
+
 	UPROPERTY(VisibleAnywhere)
 	TObjectPtr<UPS_Editor_SpawnableComponent> SpawnableComp;
 	UPROPERTY(VisibleAnywhere)