Can Static Meshes Components be Added Outside of the Constuctor?

Development Asset Creation
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1

I’ve been trying to figure out how to create a different static mesh for an actor depending on conditions it’s spawned in.

When I try to add a new static mesh to the Actor in a function that isn’t the constructor, the Engine crashes when the function is called.

Example of the function is below:

void AActor::BuildLeft(UStaticMeshComponent* Left) {

    DummyRoot = CreateDefaultSubobject<USceneComponent>(TEXT("Dummy0"));
    RootComponent = DummyRoot;
    static FConstructorStatics ConstructorStatics;
    Left->SetRelativeLocation(FVector(0.f, -75.f, 0.f));
    LeftMesh->SetStaticMesh(ConstructorStatics.LineMesh.Get());
    Left->SetRelativeRotation(FRotator(0.f, 0.f, 0.f));
    Left->SetupAttachment(DummyRoot);
}

This is a second version of the function with me trying to pass a static mesh declared in the constructor, declaring the static mesh in the function and passing nothing also didn’t work.

2

Yes, you can check this topic

3

I’ve changed to how that topic is calling for it to be done, the issue seems to be with the line:
LeftMesh->SetStaticMesh(ConstructorStatics.LineMesh.Get());
Calling that outside of the construction script seems to immediately crash the program.
I can create a new static mesh and give it properties, but I can’t seem to give it an actual mesh.

4

This ConstructorStatics struct is only created the first time the constructor is run. Probably after that it’s going to nullptr.