TriggerComponent.cpp

#include "TriggerComponent.h"

UTriggerComponent::UTriggerComponent()
{
    OpenForTag = "PressurePlateActivator";
}

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

    if (TargetActor)
    {
        TargetMoverComponent = TargetActor->FindComponentByClass<UMoverComponent>();

        if (!TargetMoverComponent)
        {
            UE_LOG(LogTemp, Warning, TEXT("Actor %s linked to %s doesn't have a UMoverComponent"), *TargetActor->GetName(), *GetName());
        }
    }
    else
    {
        UE_LOG(LogTemp, Warning, TEXT("%s is not linked to an Actor"), *GetName());
    }

    OnComponentBeginOverlap.AddDynamic(this, &UTriggerComponent::OnOverlapBegin);
    OnComponentEndOverlap.AddDynamic(this, &UTriggerComponent::OnOverlapEnd);
}

void UTriggerComponent::OnOverlapBegin(UPrimitiveComponent* OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
    if (OtherActor && OtherActor->ActorHasTag(OpenForTag))
    {
        TriggeringActorCount++;

        if (!bIsTriggered)
        {
            HandleDerivateOverlapBegin(OverlappedComp, OtherActor, OtherComp, OtherBodyIndex, bFromSweep, SweepResult);
            SetTrigger(true);
        }
    }
}

void UTriggerComponent::OnOverlapEnd(UPrimitiveComponent* OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
{
    if (bIsTriggered && OtherActor && OtherActor->ActorHasTag(OpenForTag))
    {
        TriggeringActorCount--;

        if (TriggeringActorCount == 0 && bIsTriggered)
        {
            HandleDerivateOverlapEnd(OverlappedComp, OtherActor, OtherComp, OtherBodyIndex);
            SetTrigger(false);
        }
    }
}

void UTriggerComponent::HandleDerivateOverlapBegin(UPrimitiveComponent* OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
}

void UTriggerComponent::HandleDerivateOverlapEnd(UPrimitiveComponent* OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
{
}

void UTriggerComponent::SetTrigger(bool bNewState)
{
    bIsTriggered = bNewState;

    if (TargetMoverComponent)
    {
        TargetMoverComponent->Trigger(bIsTriggered);
    }
}

void UTriggerComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
    Super::TickComponent(DeltaTime, TickType, ThisTickFunction);

}