72 - Spawning the Projectile

Source/Blaster/Components/CombatComponent.cpp

@@ -106,9 +106,11 @@ void UCombatComponent::TraceUnderCrosshairs(FHitResult& TraceHitResult)
 		if (!TraceHitResult.bBlockingHit)
 		{
 			TraceHitResult.ImpactPoint = End;
+			HitTarget = End;
 		}
 		else
 		{
+			HitTarget = TraceHitResult.ImpactPoint;
 			DrawDebugSphere(
 				GetWorld(),
 				TraceHitResult.ImpactPoint,
@@ -131,7 +133,7 @@ void UCombatComponent::MulticastFire_Implementation()
 	if (Character)
 	{
 		Character->PlayFireMontage(bAiming);
-		EquippedWeapon->Fire();
+		EquippedWeapon->Fire(HitTarget);
 	}
 }
 

Source/Blaster/Components/CombatComponent.h

@@ -58,4 +58,6 @@ private:
 	float AimWalkSpeed;
 
 	bool bFireButtonPressed;
+
+	FVector HitTarget;
 };

Source/Blaster/Weapon/ProjectileWeapon.cpp

@@ -3,3 +3,38 @@
 
 #include "ProjectileWeapon.h"
 
+#include "Projectile.h"
+#include "Engine/SkeletalMeshSocket.h"
+
+void AProjectileWeapon::Fire(const FVector& HitTarget)
+{
+	Super::Fire(HitTarget);
+
+	APawn* InstigatorPawn = Cast<APawn>(GetOwner());
+	const USkeletalMeshSocket* MuzzleFlashSocket = GetWeaponMesh()->GetSocketByName(FName("MuzzleFlash"));
+	if (MuzzleFlashSocket)
+	{
+		FTransform SocketTransform = MuzzleFlashSocket->GetSocketTransform(GetWeaponMesh());
+		// From muzzle flash socket to hit location from TraceUnderCrosshairs
+		FVector ToTarget = HitTarget - SocketTransform.GetLocation();
+		FRotator TargetRotation = ToTarget.Rotation();
+		
+		if (ProjectileClass && InstigatorPawn)
+		{
+			FActorSpawnParameters SpawnParams;
+			SpawnParams.Owner = GetOwner();
+			SpawnParams.Instigator = InstigatorPawn;
+
+			UWorld* World = GetWorld();
+			if (World)
+			{
+				World->SpawnActor<AProjectile>(
+					ProjectileClass,
+					SocketTransform.GetLocation(),
+					TargetRotation,
+					SpawnParams
+				);
+			}
+		}
+	}
+}

Source/Blaster/Weapon/ProjectileWeapon.h

@@ -13,7 +13,11 @@ UCLASS()
 class BLASTER_API AProjectileWeapon : public AWeapon
 {
 	GENERATED_BODY()
+	virtual void Fire(const FVector& HitTarget) override;
 
+private:
 
+	UPROPERTY(EditAnywhere)
+	TSubclassOf<class AProjectile> ProjectileClass;
 	
 };

Source/Blaster/Weapon/Weapon.cpp

@@ -109,7 +109,7 @@ void AWeapon::ShowPickupWidget(bool bShowWidget)
 	}
 }
 
-void AWeapon::Fire()
+void AWeapon::Fire(const FVector& HitTarget)
 {
 	if (FireAnimation)
 	{

Source/Blaster/Weapon/Weapon.h

@@ -25,7 +25,7 @@ public:
 	AWeapon();
 	virtual void GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const override;
 	void ShowPickupWidget(bool bShowWidget);
-	void Fire();
+	virtual void Fire(const FVector& HitTarget);
 	
 protected:
 	virtual void BeginPlay() override;