#My Enemies Wont Patrol on begin play

7 messages · Page 1 of 1 (latest)

frozen brook
#

Im on lecture 173 of the course and my enemies will not MoveToTarget on being play when calling that function. Ican get them to move to target on begin play if i use the GetWorldTimeManager peice of code, i can alos get them to MoveToTarget if i put that function in tick instead.

But when trying to put MoveToTarget in begin play and then use GetWorldTimeManager function in tick my enemies will not start moving to the target on begin play therefore my timer function in tick is rendered useless. Here is my code that will not get them to move.


void AEnemy::PatrolTimerFinished()
{
    MoveToTarget(PatrolTarget);
}

void AEnemy::BeginPlay()
{
    Super::BeginPlay();

    if (HealthBarWidget)
    {
        HealthBarWidget->SetVisibility(false);
    }

    EnemyController = Cast<AAIController>(GetController());
    
    MoveToTarget(PatrolTarget);

}

bool AEnemy::InTargetRange(AActor* Target, double Radius)
{
    if (Target == nullptr) return false;
    const double DistanceToTarget = (Target->GetActorLocation() - GetActorLocation()).Size();
    DRAW_SPHERE_SingleFrame(GetActorLocation());
    DRAW_SPHERE_SingleFrame(Target->GetActorLocation());
    return DistanceToTarget<= Radius;
}

void AEnemy::MoveToTarget(AActor* Target)
{
    if (EnemyController == nullptr || Target == nullptr) return;
    FAIMoveRequest MoveRequest;
    MoveRequest.SetGoalActor(Target);
    MoveRequest.SetAcceptanceRadius(15.f);
    EnemyController->MoveTo(MoveRequest);
}

AActor* AEnemy::ChoosePatrolTarget()
{
    
    TArray<AActor*> ValidTargets;
    for (AActor* Target : PatrolTargets)
    {
        if (Target != PatrolTarget)
        {
            ValidTargets.AddUnique(Target);
        }
    }

    const int32 NumPatrolTargets = ValidTargets.Num();
    if (NumPatrolTargets > 0)
    {
        const int32 TargetSelection = FMath::RandRange(0, NumPatrolTargets - 1);
        return ValidTargets[TargetSelection];
    }
    return nullptr;
}

void AEnemy::Tick(float DeltaTime)
{
    Super::Tick(DeltaTime);


    CheckCombatTarget();
    

    CheckPatrolTarget();

}
void AEnemy::CheckPatrolTarget()
{
    if (InTargetRange(PatrolTarget, PatrolRadius))
    {
        PatrolTarget = ChoosePatrolTarget();
        GetWorldTimerManager().SetTimer(PatrolTimer, this, &AEnemy::PatrolTimerFinished, 3.f);

    }
}
void AEnemy::CheckCombatTarget()
{
    if (!InTargetRange(CombatTarget, CombatRadius))
    {
        CombatTarget = nullptr;
        if (HealthBarWidget)
        {
            HealthBarWidget->SetVisibility(false);
        }
    }
}
fathom stag
#

I'm having a problem where the starting point on the navmesh is getting errors, so the enemies won't move 😦

pearl glacier
#

same here. i cant go further in this course now. this C++ Code has errors i can not solve. When trying to "MoveTo" unreal crashes. Guess this course stops here for me

grim forge
#

#include "Navigation/PathFollowingComponent.h"

#

im using unreal 5.4.3

graceful shell