Multiple questions about console reports

TwistedMind

Hello everyone,

I'd like to understand some points the console give me:

First, Why i have this message ? _update_root_rect: Font oversampling does not work in 'Viewport' stretch mode, only '2D'.

Then, i have writed this:

func _ready():
	$Area2D.connect('area_entered', self, 'selectItem', [true])
	$Area2D.connect('area_exited', self, 'selectItem', [false])

The function 'connect()' returns a value, but this value is never used.

These lines are for a selection box i must draw. I understand "something" waiting for this event coming. Should i ignore this message or can i do something ?

Then,

var cheminUnit : PoolVector2Array

func move(posMouse, ptBat=null):
	cheminUnit.empty()

The function 'empty()' returns a value, but this value is never used.

This is because 'cheminUnit' is already empty ? Esle, why this message means ?

At last,

func _on_Timer2_timeout():
	if unitType == 'benne':
		var listPosMine : PoolVector2Array

The variable 'listPosMine' was used but never assigned a value (a lot of messages like that for some others variables).

I understand this variable is local and gives this message. If i move it as a global variable, i don't have this message. What does it mean ?

cybereality

Most of those are warnings, which you can ignore if you want. They don't really harm anything. The font oversampling is just part of the engine. If your game is very text heavy, they you probably want to use 2D for the viewport in project settings. Viewport mode will stretch the pixels, so it is usually not great but can be useful for low resolution pixel games.

The other warning is for when a function returns a value (usually a status report) and you don't do anything with it. You can create a temporary variable like this and the warning will go away:

var status = $Area2D.connect('area_exited', self, 'selectItem', [false])

Or you can disable that warning in the engine settings, but better to leave them on just in case. Same for empty.

var listPosMine : PoolVector2Array

This line means you created a variable and possibly never did anything with it. It is always good to initialize variables when you declare them, it can be to a blank value, that is fine. But having uninitialized variables can cause problems if you forget to give it data and then try to read from it, potentially the game could crash, so that is why it is warning you.

TwistedMind

Allright, thank you.

Yes, it's better to let the warning system on.

DaveTheCoder

Yes, it's better to let the warning system on.

I agree.

But you can selectively suppress warnings. For example:

#warning-ignore:RETURN_VALUE_DISCARDED
$Area2D.connect('area_entered', self, 'selectItem', [true])

TwistedMind

Ouuuuh ! I take note that !!! Thank you.