j.foucher/PS_AI_Agent
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

PS_AI_Behavior: make spline StopFollowing a firm, BT-respected stop

Browse Source 
StopFollowing() now sets a bManuallyStopped flag (cleared only by an explicit StartFollowing/StartFollowingAtDistance). The FindAndFollowSpline and FollowSpline BT tasks bail while it is set, so the BT no longer auto-resumes a manual stop on the next tick. ResumeFollowing() also respects the flag. PauseFollowing() is unchanged (BT may resume).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
j.foucher
2026-06-01 09:40:56 +02:00
parent 27d0906d21
commit cfade2a265
4 changed files with 41 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
Unreal/PS_AI_Agent/Plugins/PS_AI_Behavior/Source/PS_AI_Behavior/Private/BT/PS_AI_Behavior_BTTask_FindAndFollowSpline.cpp
View File

@@ -32,6 +32,14 @@ EBTNodeResult::Type UPS_AI_Behavior_BTTask_FindAndFollowSpline::ExecuteTask(
return EBTNodeResult::Failed;
}
// Respect a manual StopFollowing(): do not search for or resume a spline until
// the caller explicitly StartFollowing() again. Without this, the task would
// resume any CurrentSpline and override the stop on the very next tick.
if (Follower->bManuallyStopped)
{
return EBTNodeResult::Failed;
}
// Debug: log state on entry
if (UPS_AI_Behavior_Statics::IsDebugEnabled(AIC->GetPawn()))
{
@@ -268,6 +276,18 @@ void UPS_AI_Behavior_BTTask_FindAndFollowSpline::TickTask(
return;
}
// Manual StopFollowing() requested mid-approach: cancel the move-to-spline and bail.
if (UPS_AI_Behavior_SplineFollowerComponent* StopCheck =
AIC->GetPawn()->FindComponentByClass<UPS_AI_Behavior_SplineFollowerComponent>())
{
if (StopCheck->bManuallyStopped)
{
AIC->StopMovement();
FinishLatentTask(OwnerComp, EBTNodeResult::Failed);
return;
}
}
// Check if we've reached the spline
if (AIC->GetMoveStatus() == EPathFollowingStatus::Idle)
{

6
Unreal/PS_AI_Agent/Plugins/PS_AI_Behavior/Source/PS_AI_Behavior/Private/BT/PS_AI_Behavior_BTTask_FollowSpline.cpp
View File

@@ -24,6 +24,12 @@ EBTNodeResult::Type UPS_AI_Behavior_BTTask_FollowSpline::ExecuteTask(
AIC->GetPawn()->FindComponentByClass<UPS_AI_Behavior_SplineFollowerComponent>();
if (!Follower) return EBTNodeResult::Failed;
// Respect a manual StopFollowing(): refuse to resume until an explicit restart.
if (Follower->bManuallyStopped)
{
return EBTNodeResult::Failed;
}
if (!Follower->CurrentSpline)
{
UE_LOG(LogPS_AI_Behavior, Warning, TEXT("[%s] FollowSpline: no current spline set."),

10
Unreal/PS_AI_Agent/Plugins/PS_AI_Behavior/Source/PS_AI_Behavior/Private/PS_AI_Behavior_SplineFollowerComponent.cpp
View File

@@ -58,6 +58,7 @@ bool UPS_AI_Behavior_SplineFollowerComponent::StartFollowingAtDistance(
CurrentDistance = FMath::Clamp(StartDistance, 0.0f, Spline->GetSplineLength());
bMovingForward = bForward;
bIsFollowing = true;
bManuallyStopped = false; // an explicit Start lifts any previous manual stop
LastHandledJunctionIndex = -1;
UE_LOG(LogPS_AI_Behavior, Warning,
@@ -82,18 +83,23 @@ bool UPS_AI_Behavior_SplineFollowerComponent::StartFollowingAtDistance(
void UPS_AI_Behavior_SplineFollowerComponent::StopFollowing()
{
bIsFollowing = false;
UE_LOG(LogPS_AI_Behavior, Verbose, TEXT("[%s] Stopped following spline."),
// Firm, manual stop: the Behavior Tree spline tasks will refuse to re-start
// following until StartFollowing()/StartFollowingAtDistance() is called again.
bManuallyStopped = true;
UE_LOG(LogPS_AI_Behavior, Log, TEXT("[%s] StopFollowing: manual stop (BT will not auto-resume)."),
GetOwner() ? *GetOwner()->GetName() : TEXT("?"));
}
void UPS_AI_Behavior_SplineFollowerComponent::PauseFollowing()
{
// Pause is NOT a manual stop — the BT is allowed to resume it.
bIsFollowing = false;
}
void UPS_AI_Behavior_SplineFollowerComponent::ResumeFollowing()
{
if (CurrentSpline)
// Do not resume over a manual stop — only an explicit Start lifts that.
if (CurrentSpline && !bManuallyStopped)
{
bIsFollowing = true;
}

7
Unreal/PS_AI_Agent/Plugins/PS_AI_Behavior/Source/PS_AI_Behavior/Public/PS_AI_Behavior_SplineFollowerComponent.h
View File

@@ -106,6 +106,13 @@ public:
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Replicated, Category = "Spline Follower|Runtime")
bool bIsFollowing = false;
/** Set by StopFollowing(): a firm, manual stop. While true, the Behavior Tree
* spline tasks refuse to (re)start following — only an explicit StartFollowing()
* / StartFollowingAtDistance() clears it. This is what distinguishes a deliberate
* stop from PauseFollowing() (which the BT is allowed to auto-resume). */
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Spline Follower|Runtime")
bool bManuallyStopped = false;
// ─── Delegates ──────────────────────────────────────────────────────
/** Fired when approaching a junction. Use to make custom spline selection. */