The FHitResult has two things called components

[BlueBird_House]

The FHitResult has two things called components. They are pointing the same thing; however, they have a different type.
One is returned from function ‘GetComponent’, which belongs to ‘UPrimitiveComponent*.’
The other is a variable of the FHitResult, which belongs to ‘TWeakObjectPtr<UPrimitiveComponent, TWeakObjectPtrBase>.’
What is the second one?
I cannot use the second one because the computer says it cannot be changed into the ‘UPrimitiveComponent*.’

[DanM]

@BlueBird_House

two things called components

One is a function the other is a variable.

@BlueBird_House

What is the second one?

It’s a weak pointer. From the docs

FWeakObjectPtr is a weak pointer to a UObject. It can return nullptr later if the object is garbage collected. It has no impact on if the object is garbage collected or not. It can’t be directly used across a network.

Most often it is used when you explicitly do NOT want to prevent something from being garbage collected.

@BlueBird_House

I cannot use the second one because the computer says it cannot be changed into the ‘UPrimitiveComponent*.’

Because they are different types. You can get the raw pointer from the weak pointer type by calling Get() on it, which is exactly what GetComponent() does.

/** Utility to return the Component that was hit. */
FORCEINLINE UPrimitiveComponent* GetComponent() const
{
    return Component.Get();
}