blaster/Source/Blaster/Weapon/Projectile.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "Projectile.h"

#include "NiagaraFunctionLibrary.h"
#include "Blaster/Blaster.h"
#include "Components/BoxComponent.h"
#include "Kismet/GameplayStatics.h"
#include "Sound/SoundCue.h"

AProjectile::AProjectile()
{
	PrimaryActorTick.bCanEverTick = true;
	bReplicates = true;

	CollisionBox = CreateDefaultSubobject<UBoxComponent>(TEXT("CollisionBox"));
	SetRootComponent(CollisionBox);
	CollisionBox->SetCollisionObjectType(ECC_WorldDynamic);
	CollisionBox->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
	CollisionBox->SetCollisionResponseToChannels(ECR_Ignore);
	CollisionBox->SetCollisionResponseToChannel(ECC_Visibility, ECR_Block);
	CollisionBox->SetCollisionResponseToChannel(ECC_WorldStatic, ECR_Block);
	CollisionBox->SetCollisionResponseToChannel(ECC_SkeletalMesh, ECR_Block);
}

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

	if (Tracer)
	{
		TracerComponent = UGameplayStatics::SpawnEmitterAttached(
			Tracer,
			CollisionBox,
			FName(),
			GetActorLocation(),
			GetActorRotation(),
			EAttachLocation::KeepWorldPosition
		);
	}

	if (HasAuthority())
	{
		CollisionBox->OnComponentHit.AddDynamic(this, &AProjectile::OnHit);
	}
}

void AProjectile::OnHit(UPrimitiveComponent* HitComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit)
{
	Destroy();
}

void AProjectile::SpawnTrailSystem()
{
	if (TrailSystem)
	{
		TrailSystemComponent = UNiagaraFunctionLibrary::SpawnSystemAttached(
			TrailSystem,
			GetRootComponent(),
			FName(),
			GetActorLocation(),
			GetActorRotation(),
			EAttachLocation::KeepWorldPosition,
			false
		);
	}
}

void AProjectile::ExplodeDamage()
{
	APawn* FiringPawn = GetInstigator();
	if (FiringPawn && HasAuthority())
	{
		AController* FiringController = FiringPawn->GetController();
		if (FiringController)
		{
			UGameplayStatics::ApplyRadialDamageWithFalloff(
				this,
				Damage,
				10.f,
				GetActorLocation(),
				DamageInnerRadius,
				DamageOuterRadius,
				1.f,
				UDamageType::StaticClass(),
				TArray<AActor*>(),
				this,
				FiringController
			);
		}
	}
}

void AProjectile::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);
}

void AProjectile::StartDestroyTimer()
{
	GetWorldTimerManager().SetTimer(
	DestroyTimer,
	this,
	&AProjectile::DestroyTimerFinished,
	DestroyTime
);
}

void AProjectile::DestroyTimerFinished()
{
	Destroy();
}

void AProjectile::Destroyed()
{
	Super::Destroyed();

	if (ImpactParticles)
	{
		UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ImpactParticles, GetActorTransform());
	}
	if (ImpactSound)
	{
		UGameplayStatics::PlaySoundAtLocation(this, ImpactSound, GetActorLocation());
	}
}