LyraStarterGame/Source/LyraGame/Interaction/Tasks/AbilityTask_WaitForInteractableTargets_SingleLineTrace.cpp

// Copyright Epic Games, Inc. All Rights Reserved.

#include "AbilityTask_WaitForInteractableTargets_SingleLineTrace.h"
#include "Interaction/InteractionStatics.h"
#include "DrawDebugHelpers.h"
#include "Engine/World.h"
#include "TimerManager.h"

#include UE_INLINE_GENERATED_CPP_BY_NAME(AbilityTask_WaitForInteractableTargets_SingleLineTrace)

UAbilityTask_WaitForInteractableTargets_SingleLineTrace::UAbilityTask_WaitForInteractableTargets_SingleLineTrace(const FObjectInitializer& ObjectInitializer)
	: Super(ObjectInitializer)
{
}

UAbilityTask_WaitForInteractableTargets_SingleLineTrace* UAbilityTask_WaitForInteractableTargets_SingleLineTrace::WaitForInteractableTargets_SingleLineTrace(UGameplayAbility* OwningAbility, FInteractionQuery InteractionQuery, FCollisionProfileName TraceProfile, FGameplayAbilityTargetingLocationInfo StartLocation, float InteractionScanRange, float InteractionScanRate, bool bShowDebug)
{
	UAbilityTask_WaitForInteractableTargets_SingleLineTrace* MyObj = NewAbilityTask<UAbilityTask_WaitForInteractableTargets_SingleLineTrace>(OwningAbility);
	MyObj->InteractionScanRange = InteractionScanRange;
	MyObj->InteractionScanRate = InteractionScanRate;
	MyObj->StartLocation = StartLocation;
	MyObj->InteractionQuery = InteractionQuery;
	MyObj->TraceProfile = TraceProfile;
	MyObj->bShowDebug = bShowDebug;

	return MyObj;
}

void UAbilityTask_WaitForInteractableTargets_SingleLineTrace::Activate()
{
	SetWaitingOnAvatar();

	UWorld* World = GetWorld();
	World->GetTimerManager().SetTimer(TimerHandle, this, &ThisClass::PerformTrace, InteractionScanRate, true);
}

void UAbilityTask_WaitForInteractableTargets_SingleLineTrace::OnDestroy(bool AbilityEnded)
{
	if (UWorld* World = GetWorld())
	{
		World->GetTimerManager().ClearTimer(TimerHandle);
	}

	Super::OnDestroy(AbilityEnded);
}

void UAbilityTask_WaitForInteractableTargets_SingleLineTrace::PerformTrace()
{
	AActor* AvatarActor = Ability->GetCurrentActorInfo()->AvatarActor.Get();
	if (!AvatarActor)
	{
		return;
	}

	UWorld* World = GetWorld();

	TArray<AActor*> ActorsToIgnore;
	ActorsToIgnore.Add(AvatarActor);

	const bool bTraceComplex = false;
	FCollisionQueryParams Params(SCENE_QUERY_STAT(UAbilityTask_WaitForInteractableTargets_SingleLineTrace), bTraceComplex);
	Params.AddIgnoredActors(ActorsToIgnore);

	FVector TraceStart = StartLocation.GetTargetingTransform().GetLocation();
	FVector TraceEnd;
	AimWithPlayerController(AvatarActor, Params, TraceStart, InteractionScanRange, OUT TraceEnd);

	FHitResult OutHitResult;
	LineTrace(OutHitResult, World, TraceStart, TraceEnd, TraceProfile.Name, Params);

	TArray<TScriptInterface<IInteractableTarget>> InteractableTargets;
	UInteractionStatics::AppendInteractableTargetsFromHitResult(OutHitResult, InteractableTargets);

	UpdateInteractableOptions(InteractionQuery, InteractableTargets);

#if ENABLE_DRAW_DEBUG
	if (bShowDebug)
	{
		FColor DebugColor = OutHitResult.bBlockingHit ? FColor::Red : FColor::Green;
		if (OutHitResult.bBlockingHit)
		{
			DrawDebugLine(World, TraceStart, OutHitResult.Location, DebugColor, false, InteractionScanRate);
			DrawDebugSphere(World, OutHitResult.Location, 5, 16, DebugColor, false, InteractionScanRate);
		}
		else
		{
			DrawDebugLine(World, TraceStart, TraceEnd, DebugColor, false, InteractionScanRate);
		}
	}
#endif // ENABLE_DRAW_DEBUG
}