Ways to change Projectile Movement Component parameters during its spawn?

[pomato]

So I’m at the part in Toon Tanks where we get to spawn the projectile and move it, which is great.

However, I do have a question on it.
So hypothetically, if I were to create 10 different kinds tanks and each tank will have a different kind of initialspeed and maxspeed for its projectile. Are there ways to change the projectilemovement parameters at its spawn? Or will I have to end up creating 10 different kinds of projectile blueprints, 1 for each tank?

As a reminder for those who don’t remember this lesson anymore, we have a BasePawn class that has a ‘fire()’ function, which has a spawnactor function (for spawning the BluePrint version of the Projectile class).

void ABasePawn::Fire()
{
	auto Projectile = GetWorld()->SpawnActor<AProjectile>(ProjectileClass, ProjectileSpawnPoint->GetComponentLocation(), ProjectileSpawnPoint->GetComponentRotation());
}

And in the Projectile’s Constructor, that’s where all the UProjectileMovementComponent thing happens.

AProjectile::AProjectile()
{
	PrimaryActorTick.bCanEverTick = false;
	
	ProjectileMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Projectile Mesh"));
	RootComponent = ProjectileMesh;
	
	InitialSpeed = 2500.f;
	MaxSpeed = 4000.f;

	ProjectileMovementComponent = CreateDefaultSubobject<UProjectileMovementComponent>(TEXT("Projectile Movement Component"));
	ProjectileMovementComponent->bRotationFollowsVelocity = true;
	ProjectileMovementComponent->InitialSpeed = this->InitialSpeed;
	ProjectileMovementComponent->MaxSpeed = this->MaxSpeed;

}

First I had the idea of Constructor Overloading, but I have no clue how to do that in combination with the SpawnActor().

And the second thing I tried was grabbing the pointer to the spawned projectile and somehow change the InitialSpeed and MaxSpeed of the UProjectileMovementComponent. But I couldn’t make it work lol.

I could always just simply make a million different BluePrints versions of the projectile, but I would find it quit inefficient that way.

[DanM]

You can use SpawnActorDeferred which doesn’t call BeginPlay until you call FinishSpawningActor. See here for how/when things get called

Actor Lifecycle | Unreal Engine Documentation

const FVector Location = ProjectileSpawnPoint->GetComponentLocation();
const FRotator Rotation = ProjectileSpawnPoint->GetComponentRotation();

AProjectile* Projectile = GetWorld()->SpawnActorDeferred<AProjectile>(ProjectileClass, FTransform(Rotation,Location));

// Do stuff

UGameplayStatics::FinishSpawningActor(Projectile, FTransform(Rotation, Location));

[pomato]

Thanks! This solves exactly the issue I was having!