Inheritance

Inheritance in Vellum allows you to extend base scripts. You can then attach your scripts to game objects and to override game events.

Extending scripts

Use colon : after the script name followed by the base script name to extend a base script:

script MyObject : ObjectReference {

}

Overriding members

A child script can override any function/event of any base script in the hierarchy:

script MyObject : ObjectReference {
    event onInit() {

    }

    event onActivate(obj: ObjectReference) {

    }
}

Parent properties are inherited; you cannot redeclare them on the child.

Signature rules are still loose in the compiler (there is no strict check yet) mainly because of the Papyrus case-insensitive nature. This way we can keep compatibility with the Papyrus scripts and extend them in Vellum.

Super expression

super gives you access to the base script properties and functions. This example will trace "Base::bar":

script Base {

    fun bar() {
        Debug.Trace("Base::bar")
    }
}

script Derived : Base {

    fun bar() {
        super.bar()
    }
}