Split posture: eyes+head on selection, body on conversation start

PostureComponent gains bEnableBodyTracking flag. When false, only
head and eyes track the target — body stays frozen.

InteractionComponent now:
- On posture attach: sets TargetActor but disables body tracking
  (agent notices player with eyes+head only)
- On StartListening: enables body tracking (agent fully engages)
- On StopListening: disables body tracking

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_InteractionComponent.cpp

@@ -198,6 +198,12 @@ void UPS_AI_ConvAgent_InteractionComponent::SetSelectedAgent(UPS_AI_ConvAgent_El
 		if (bAutoManageListening)
 		{
 			OldAgent->StopListening();
+
+			// Disable body tracking — eyes+head will return to neutral via posture detach.
+			if (UPS_AI_ConvAgent_PostureComponent* Posture = FindPostureOnAgent(OldAgent))
+			{
+				Posture->bEnableBodyTracking = false;
+			}
 		}
 
 		// ── Posture: detach ──────────────────────────────────────────────
@@ -244,6 +250,12 @@ void UPS_AI_ConvAgent_InteractionComponent::SetSelectedAgent(UPS_AI_ConvAgent_El
 		if (bAutoManageListening)
 		{
 			NewAgent->StartListening();
+
+			// Now that we're talking, enable full body tracking.
+			if (UPS_AI_ConvAgent_PostureComponent* Posture = FindPostureOnAgent(NewAgent))
+			{
+				Posture->bEnableBodyTracking = true;
+			}
 		}
 
 		// ── Posture: attach ──────────────────────────────────────────────
@@ -345,10 +357,12 @@ void UPS_AI_ConvAgent_InteractionComponent::AttachPostureTarget(
 	if (UPS_AI_ConvAgent_PostureComponent* Posture = FindPostureOnAgent(AgentPtr))
 	{
 		Posture->TargetActor = GetOwner();
+		// Eyes+head only at first — body tracking is enabled when listening starts.
+		Posture->bEnableBodyTracking = false;
 
 		if (bDebug)
 		{
-			UE_LOG(LogPS_AI_ConvAgent_Select, Log, TEXT("Posture attached: %s -> %s"),
+			UE_LOG(LogPS_AI_ConvAgent_Select, Log, TEXT("Posture attached (eyes+head only): %s -> %s"),
 				AgentPtr->GetOwner() ? *AgentPtr->GetOwner()->GetName() : TEXT("(null)"),
 				GetOwner() ? *GetOwner()->GetName() : TEXT("(null)"));
 		}

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_PostureComponent.cpp

@@ -240,12 +240,16 @@ void UPS_AI_ConvAgent_PostureComponent::TickComponent(
 		}
 
 		// Body smoothly interpolates toward its persistent target
-		const float BodyDelta = FMath::FindDeltaAngleDegrees(
+		// (only when body tracking is enabled — otherwise only head+eyes move).
-			Owner->GetActorRotation().Yaw, TargetBodyWorldYaw);
+		if (bEnableBodyTracking)
-		if (FMath::Abs(BodyDelta) > 0.1f)
 		{
-			const float BodyStep = FMath::FInterpTo(0.0f, BodyDelta, SafeDeltaTime, BodyInterpSpeed);
+			const float BodyDelta = FMath::FindDeltaAngleDegrees(
-			Owner->AddActorWorldRotation(FRotator(0.0f, BodyStep, 0.0f));
+				Owner->GetActorRotation().Yaw, TargetBodyWorldYaw);
+			if (FMath::Abs(BodyDelta) > 0.1f)
+			{
+				const float BodyStep = FMath::FInterpTo(0.0f, BodyDelta, SafeDeltaTime, BodyInterpSpeed);
+				Owner->AddActorWorldRotation(FRotator(0.0f, BodyStep, 0.0f));
+			}
 		}
 
 		// ── 3. Compute DeltaYaw after body interp ──────────────────────────
@@ -274,7 +278,7 @@ void UPS_AI_ConvAgent_PostureComponent::TickComponent(
 			BodyTargetFacing, TargetWorldYaw);
 
 		bool bBodyOverflowed = false;
-		if (FMath::Abs(DeltaFromBodyTarget) > MaxHeadYaw + MaxEyeHorizontal)
+		if (bEnableBodyTracking && FMath::Abs(DeltaFromBodyTarget) > MaxHeadYaw + MaxEyeHorizontal)
 		{
 			// Body realigns to face target
 			TargetBodyWorldYaw = TargetWorldYaw - MeshForwardYawOffset;

Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Public/PS_AI_ConvAgent_PostureComponent.h

@@ -73,6 +73,12 @@ public:
 		meta = (ToolTip = "Target actor to look at.\nSet to null to return to neutral."))
 	TObjectPtr<AActor> TargetActor;
 
+	/** When false, body rotation is frozen — only head and eyes track the target.
+	 *  Useful to have the agent notice the player (eyes+head) before fully engaging (body). */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|Posture",
+		meta = (ToolTip = "Enable body rotation toward the target.\nWhen false, only head and eyes track."))
+	bool bEnableBodyTracking = true;
+
 	/** Offset from the target actor's origin to aim at.
 	 *  Useful for actors without a skeleton (e.g. (0,0,160) for eye-level). */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "PS AI ConvAgent|Posture",