How do you cast a variable?

vijay_shastri

My question specifically pertains casting floats to integers. I tried using n = int(n) as well as n = n as int. Neither worked, silently doing nothing at all. Is there something I'm missing?

Megalomaniak

https://docs.godotengine.org/en/stable/getting_started/scripting/gdscript/static_typing.html#variable-casting

Variable casting

Type casting is a key concept in typed languages. Casting is the conversion of a value from one type to another.

Imagine an Enemy in your game, that extends Area2D. You want it to collide with the Player, a KinematicBody2D with a script called PlayerController attached to it. You use the on_body_entered signal to detect the collision. With typed code, the body you detect is going to be a generic PhysicsBody2D, and not your PlayerController on the _on_body_entered callback.

You can check if this PhysicsBody2D is your Player with the as casting keyword, and using the colon : again to force the variable to use this type. This forces the variable to stick to the PlayerController type:
func _on_body_entered(body: PhysicsBody2D) -> void:
    var player := body as PlayerController
    if not player:
        return

    player.damage()
As we’re dealing with a custom type, if the body doesn’t extend PlayerController, the player variable will be set to null. We can use this to check if the body is the player or not. We will also get full autocompletion on the player variable thanks to that cast.

I think in your examples you are forgetting to use the colon : as per the above linked documentation:

@vijay_shastri said: I tried using n = int(n) as well as n = n as int.

cybereality

Make sure "n" is declared as int. If it's a float, then there will still be an implicit conversion. In your example you are assigning n to itself, which I don't believe will work (n will be implicitly converted to whatever it is). You should use two variables if they need to be different types.

Megalomaniak

Ah, yeah that sounds about right.