Combat mechanics, Level design and an intro Cutscene

* Added a cinematic on level start that shows the way ahead
* The HUD and Player character are hidden and input disabled during
the cutscene. Then reenabled after.
* Various level design changes.
* Added a damage multiplier to weapon rarities
that's taken into account.
* Changed stun chance calculation to make it depend on
the damage inflicted and enemy health. To avoid constant stuns
with the SMG.
* Fixed input still working after player death.
* Explosive barrels now make other barrels explode in chain.

Source/Shooter/Enemy.cpp

@@ -30,7 +30,7 @@ AEnemy::AEnemy() :
 	bCanHitReact(true),
 	HitNumberDestroyTime(1.5f),
 	bStunned(false),
-	StunChance(.5f),
+	StunChance(0.8f),
 	AttackLFast(TEXT("AttackLFast")),
 	AttackRFast(TEXT("AttackRFast")),
 	AttackL(TEXT("AttackL")),
@@ -235,7 +235,7 @@ void AEnemy::CombatRangeOverlap(UPrimitiveComponent* OverlappedComponent, AActor
 	
 	if (!EnemyController) return;
 	EnemyController->GetBlackboardComponent()->SetValueAsBool(TEXT("InAttackRange"), true);
-	//UE_LOG(LogTemp, Warning, TEXT("overlap player"));
+	//UE_LOG(LogTemp, Warning, TEXT("overlap player: %d"), static_cast<int>(bInAttackRange));
 }
 
 void AEnemy::CombatRangeEndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
@@ -428,9 +428,12 @@ float AEnemy::TakeDamage(float DamageAmount, FDamageEvent const& DamageEvent, AC
 	
 	ShowHealthBar();
     
+    // Determine actual Stun Chance based on health and damage inflicted
+    float ActualStunChance = DamageInflicted / (Health / 10.f) * StunChance;
+    
 	// Determine whether bullet hit stuns
 	const float Stunned = FMath::FRandRange(0.f, 1.f);
-	if (Stunned <= StunChance)
+	if (Stunned <= ActualStunChance)
 	{
 		// Stun the Enemy
 		PlayHitMontage(FName("HitReactFront"));

Source/Shooter/Explosive.cpp

@@ -15,7 +15,8 @@
 
 // Sets default values
 AExplosive::AExplosive() :
-	Damage(40.f)
+	Damage(40.f),
+	Exploded(false)
 {
  	// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
 	PrimaryActorTick.bCanEverTick = true;
@@ -41,27 +42,53 @@ void AExplosive::Tick(float DeltaTime)
 
 }
 
-void AExplosive::BulletHit_Implementation(FHitResult HitResult, AActor* Shooter, AController* ShooterController)
+void AExplosive::Explode(AActor* Shooter, AController* ShooterController)
 {
-	if (ExplosionSound)
-	{
-		UGameplayStatics::PlaySoundAtLocation(this, ExplosionSound, GetActorLocation());
-	}
+    Exploded = true;
     
-	if (ExplosionParticles)
-	{
-		UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ExplosionParticles, HitResult.Location, FRotator(0.0), true);
-	}
+    if (ExplosionSound)
+    {
+        UGameplayStatics::PlaySoundAtLocation(this, ExplosionSound, GetActorLocation());
+    }
 
-	// Apply explosive damage
-	TArray<AActor*> OverlappingActors;
-	GetOverlappingActors(OverlappingActors, ACharacter::StaticClass());
+    if (ExplosionParticles)
+    {
+        UGameplayStatics::SpawnEmitterAtLocation(GetWorld(), ExplosionParticles, GetActorLocation(), FRotator(0.0), true);
+    }
 
-	for (auto Actor : OverlappingActors)
-	{
-		UGameplayStatics::ApplyDamage(Actor, Damage, ShooterController, Shooter, UDamageType::StaticClass());
-	}
+    // Apply explosive damage
+    TArray<AActor*> OverlappingActors;
+    GetOverlappingActors(OverlappingActors, ACharacter::StaticClass());
 
-	Destroy();
+    for (auto Actor : OverlappingActors)
+    {
+        UGameplayStatics::ApplyDamage(Actor, Damage, ShooterController, Shooter, UDamageType::StaticClass());
+    }
+    
+    // Other explosives
+    OverlappingActors.Empty();
+    GetOverlappingActors(OverlappingActors, AExplosive::StaticClass());
+    for (auto Actor : OverlappingActors)
+    {
+        AExplosive* Explosive = Cast<AExplosive>(Actor);
+        if (Explosive && Explosive != this && !Explosive->Exploded)
+            UGameplayStatics::ApplyDamage(Actor, Damage, ShooterController, Shooter, UDamageType::StaticClass());
+    }
+    
+    Destroy();
+}
+
+void AExplosive::BulletHit_Implementation(FHitResult HitResult, AActor* Shooter, AController* ShooterController)
+{
+	Explode(Shooter, ShooterController);
+}
+
+float AExplosive::TakeDamage(float DamageAmount, FDamageEvent const& DamageEvent, AController* EventInstigator,
+	AActor* DamageCauser)
+{
+    Super::TakeDamage(DamageAmount, DamageEvent, EventInstigator, DamageCauser);
+    
+    Explode(DamageCauser, EventInstigator);
+    return DamageAmount;
 }
 

Source/Shooter/Explosive.h

@@ -25,6 +25,7 @@ protected:
 	// Called when the game starts or when spawned
 	virtual void BeginPlay() override;
     
+    void Explode(AActor* Shooter, AController* ShooterController);
 private:
 
 	/** Particles to spawn when hit by bullets */
@@ -46,9 +47,14 @@ private:
 	/** Damage amount for explosive */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Combat, meta = (AllowPrivateAccess = true))
 	float Damage;
+	
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Combat, meta = (AllowPrivateAccess = true))
+	bool Exploded;
 public:	
 	// Called every frame
 	virtual void Tick(float DeltaTime) override;
 
 	virtual void BulletHit_Implementation(FHitResult HitResult, AActor* Shooter, AController* ShooterController) override;
+	
+	virtual float TakeDamage(float DamageAmount, FDamageEvent const& DamageEvent, AController* EventInstigator, AActor* DamageCauser) override;
 };

Source/Shooter/Item.cpp

@@ -210,6 +210,7 @@ void AItem::OnConstruction(const FTransform& Transform)
 			{
 				GetItemMesh()->SetCustomDepthStencilValue(RarityRow->CustomDepthStencil);
 			}
+			DamageMultiplier = RarityRow->DamageMultiplier;
 
 			if (MaterialInstance)
 			{

Source/Shooter/Item.h

@@ -35,7 +35,7 @@ enum class EItemRarity : uint8
 UENUM(BlueprintType)
 enum class EItemState : uint8
 {
-	EIS_Pickup UMETA(DisplayName = "Damaged"),
+	EIS_Pickup UMETA(DisplayName = "Pickup"),
 	EIS_EquipInterping UMETA(DisplayName = "EquipInterping"),
 	EIS_PickedUp UMETA(DisplayName = "PickedUp"),
 	EIS_Equipped UMETA(DisplayName = "Equipped"),
@@ -75,6 +75,9 @@ struct FItemRarityTable : public FTableRowBase
 
 	UPROPERTY(EditAnywhere, BlueprintReadWrite)
 	int32 CustomDepthStencil;
+	
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
+	float DamageMultiplier;
 };
 
 UCLASS()
@@ -305,6 +308,10 @@ private:
 	/** Background icon for the inventory */
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Rarity, meta = (AllowPrivateAccess = true))
 	UTexture2D* IconBackground;
+	
+	/** Damage multiplier applied on the weapon damage */
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Rarity, meta = (AllowPrivateAccess = true))
+	float DamageMultiplier;
 public:
 	FORCEINLINE UWidgetComponent* GetPickupWidget() const { return PickupWidget; }
 
@@ -349,6 +356,8 @@ public:
 	FORCEINLINE void SetMaterialIndex(int32 Index) { MaterialIndex = Index; }
 	FORCEINLINE int32 GetMaterialIndex() const { return MaterialIndex; }
 
+	FORCEINLINE float GetDamageMultiplier() const { return DamageMultiplier; }
+
 	/** Called from the AShooterCharacter class */
 	void StartItemCurve(AShooterCharacter* Char, bool bForcePlaySound = false);
 

Source/Shooter/ShooterCharacter.cpp

@@ -61,8 +61,8 @@ AShooterCharacter::AShooterCharacter() :
 	CameraInterpDistance(150.f),
 	CameraInterpElevation(55.f),
 	// Starting ammo amounts
-	Starting9mmAmmo(85),
-	StartingARAmmo(120),
+	Starting9mmAmmo(15),
+	StartingARAmmo(0),
 	// Combat variables
 	CombatState(ECombatState::ECS_Unoccupied),
 	bCrouching(false),
@@ -238,6 +238,12 @@ void AShooterCharacter::Die()
 	if (bDying) return;
 	bDying = true;
 	
+	APlayerController* PC = UGameplayStatics::GetPlayerController(this, 0);
+	if (PC)
+	{
+		DisableInput(PC);
+	}
+	
 	if (!DeathMontage) return;
 	
 	UAnimInstance* AnimInstance = GetMesh()->GetAnimInstance();
@@ -249,11 +255,6 @@ void AShooterCharacter::Die()
 void AShooterCharacter::FinishDeath()
 {
 	GetMesh()->bPauseAnims = true;
-	APlayerController* PC = UGameplayStatics::GetPlayerController(this, 0);
-	if (PC)
-	{
-		DisableInput(PC);
-	}
 }
 
 // Called every frame
@@ -691,6 +692,7 @@ void AShooterCharacter::FireWeapon()
 	if (!WeaponHasAmmo())
 	{
 		ReloadWeapon();
+		return;
 	}
 
 	PlayFireSound();
@@ -788,12 +790,12 @@ void AShooterCharacter::SendBullet()
 			float damageToApply;
 			if (BeamHitResult.BoneName.ToString() == HitEnemy->GetHeadBone())
 			{
-				damageToApply = EquippedWeapon->GetHeadshotDamage();
+				damageToApply = EquippedWeapon->GetHeadshotDamage() * EquippedWeapon->GetDamageMultiplier();
 				HitEnemy->ShowHitNumber(damageToApply, BeamHitResult.Location, true);
 			}
 			else
 			{
-				damageToApply = EquippedWeapon->GetDamage();
+				damageToApply = EquippedWeapon->GetDamage() * EquippedWeapon->GetDamageMultiplier();
 				HitEnemy->ShowHitNumber(damageToApply, BeamHitResult.Location, false);
 			}
 			

Source/Shooter/ShooterPlayerController.cpp

@@ -21,7 +21,33 @@ void AShooterPlayerController::BeginPlay()
 		if (HUDOverlay)
 		{
 			HUDOverlay->AddToViewport();
-			HUDOverlay->SetVisibility(ESlateVisibility::Visible);
+			HUDOverlay->SetVisibility(ESlateVisibility::Hidden);
 		}
 	}
 }
+
+void AShooterPlayerController::GameHasEnded(AActor* EndGameFocus, bool bIsWinner)
+{
+	Super::GameHasEnded(EndGameFocus, bIsWinner);
+	HUDOverlay->RemoveFromParent();
+	
+	/*if (bIsWinner)
+	{
+		UUserWidget* WinScreen = CreateWidget(this, WinScreenClass);
+		if (WinScreen != nullptr)
+		{
+			WinScreen->AddToViewport();
+		}
+	}
+	else
+	{
+		UUserWidget* LoseScreen = CreateWidget(this, LoseScreenClass);
+		if (LoseScreen != nullptr)
+		{
+			LoseScreen->AddToViewport();
+		}
+	}
+	
+	GetWorldTimerManager().SetTimer(RestartTimer, this, &APlayerController::RestartLevel, RestartDelay);*/
+}
+

Source/Shooter/ShooterPlayerController.h

@@ -17,6 +17,7 @@ class SHOOTER_API AShooterPlayerController : public APlayerController
 	GENERATED_BODY()
 public:
 	AShooterPlayerController();
+    virtual void GameHasEnded(class AActor* EndGameFocus = nullptr, bool bIsWinner = false) override;
     
 protected:
 	virtual void BeginPlay() override;