160 lines
3.9 KiB
C++
160 lines
3.9 KiB
C++
// Fill out your copyright notice in the Description page of Project Settings.
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#include "Enemy.h"
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#include "Blueprint/UserWidget.h"
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#include "Kismet/GameplayStatics.h"
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#include "Sound/SoundCue.h"
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#include "Particles/ParticleSystemComponent.h"
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#include "Kismet/KismetMathLibrary.h"
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#include "DrawDebugHelpers.h"
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#include "EnemyController.h"
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#include "BehaviorTree/BlackboardComponent.h"
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// Sets default values
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AEnemy::AEnemy() :
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Health(100.f),
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MaxHealth(100.f),
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HealthBarDisplayTime(4.f),
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HitReactTimeMin(.5f),
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HitReactTimeMax(1.f),
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bCanHitReact(true),
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HitNumberDestroyTime(1.5f)
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{
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// Set this character to call Tick() every frame. You can turn this off to improve performance if you don't need it.
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PrimaryActorTick.bCanEverTick = true;
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}
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// Called when the game starts or when spawned
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void AEnemy::BeginPlay()
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{
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Super::BeginPlay();
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GetMesh()->SetCollisionResponseToChannel(ECollisionChannel::ECC_Visibility, ECollisionResponse::ECR_Block);
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// Get the AI Controller
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EnemyController = Cast<AEnemyController>(GetController());
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const FVector WorldPatrolPoint = UKismetMathLibrary::TransformLocation(GetActorTransform(), PatrolPoint);
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DrawDebugSphere(GetWorld(), WorldPatrolPoint, 25.f, 12, FColor::Red, true);
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if (EnemyController)
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{
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EnemyController->GetBlackboardComponent()->SetValueAsVector("PatrolPoint", WorldPatrolPoint);
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EnemyController->RunBehaviorTree(BehaviorTree);
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}
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}
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void AEnemy::ShowHealthBar_Implementation()
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{
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GetWorldTimerManager().ClearTimer(HealthBarTimer);
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GetWorldTimerManager().SetTimer(HealthBarTimer, this, &AEnemy::HideHealthBar, HealthBarDisplayTime);
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}
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void AEnemy::Die()
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{
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HideHealthBar();
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}
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void AEnemy::PlayHitMontage(FName Section, float PlayRate)
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{
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if (!bCanHitReact) return;
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if (UAnimInstance* AnimInstance = GetMesh()->GetAnimInstance())
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{
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AnimInstance->Montage_Play(HitMontage, PlayRate);
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AnimInstance->Montage_JumpToSection(Section, HitMontage);
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bCanHitReact = false;
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const float HitReactTime{ FMath::FRandRange(HitReactTimeMin, HitReactTimeMax) };
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GetWorldTimerManager().SetTimer(HitReactTimer, this, &AEnemy::ResetHitReactTimer, HitReactTime);
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}
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}
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void AEnemy::ResetHitReactTimer()
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{
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bCanHitReact = true;
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}
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void AEnemy::StoreHitNumber(UUserWidget* HitNumber, FVector Location)
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{
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HitNumbers.Add(HitNumber, Location);
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FTimerHandle HitNumberTimer;
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FTimerDelegate HitNumberDelegate;
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HitNumberDelegate.BindUFunction(this, FName("DestroyHitNumber"), HitNumber);
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GetWorldTimerManager().SetTimer(HitNumberTimer, HitNumberDelegate, HitNumberDestroyTime, false);
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}
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void AEnemy::DestroyHitNumber(UUserWidget* HitNumber)
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{
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HitNumbers.Remove(HitNumber);
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HitNumber->RemoveFromParent();
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}
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void AEnemy::UpdateHitNumbers()
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{
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for (auto& HitPair : HitNumbers)
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{
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UUserWidget* HitNumber{ HitPair.Key };
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const FVector Location{ HitPair.Value };
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FVector2D ScreenPosition;
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UGameplayStatics::ProjectWorldToScreen(GetWorld()->GetFirstPlayerController(),
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Location, ScreenPosition);
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HitNumber->SetPositionInViewport(ScreenPosition);
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}
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}
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// Called every frame
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void AEnemy::Tick(float DeltaTime)
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{
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Super::Tick(DeltaTime);
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UpdateHitNumbers();
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}
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// Called to bind functionality to input
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void AEnemy::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
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{
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Super::SetupPlayerInputComponent(PlayerInputComponent);
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}
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void AEnemy::BulletHit_Implementation(FHitResult HitResult)
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{
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if (ImpactSound)
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{
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UGameplayStatics::PlaySoundAtLocation(this, ImpactSound, GetActorLocation());
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}
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if (ImpactParticles)
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{
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UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ImpactParticles, HitResult.Location, FRotator(0.f), true);
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}
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ShowHealthBar();
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PlayHitMontage(FName("HitReactFront"));
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}
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float AEnemy::TakeDamage(float DamageAmount, FDamageEvent const& DamageEvent, AController* EventInstigator,
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AActor* DamageCauser)
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{
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float DamageInflicted = DamageAmount;
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if (Health - DamageAmount <= 0.f)
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{
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DamageInflicted = Health;
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Health = 0.f;
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Die();
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}
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else
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{
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Health -= DamageAmount;
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}
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return DamageInflicted;
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}
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