Allow Timer nodes to ignore engine time scale

[hakro]

Sometimes, you don't want the Timer nodes to be impacted by the Engine.time_scale setting. This would be the case for example when you want to make HTTP calls to a server at regular intervals, without being affected by the time scale.

This PR adds the possibility to ignore Engine.time_scale in Timer nodes.

Note that this feature is already present when using SceneTreeTimer create_timer(time_sec: float, process_always: bool = true, process_in_physics: bool = false, ignore_time_scale: bool = false)

But SceneTreeTimer is only one_shot, and thus cannot be an alternative solution when you need to run a function at regular intervals.

Testing this PR should be pretty straight forward.

1 - Add a Node2D, with a Label and Timer nodes as children
2 - Give the Timer something like 100 seconds wait time
3 - Add the script below
4 - Run the game, then check & uncheck the Ignore Time Scale from the editor to see the difference

extends Node2D

@onready var label : Label = $Label
@onready var timer : Timer = $Timer

func _physics_process(delta: float) -> void:
	
	Engine.time_scale = 10
	label.text = "Timeout left : " + str(timer.time_left)

• Production edit: See
  Add improved support for unscaled time godot-proposals#7775
  and Add a time_scale modifier to Timer scene for independent time control godot-proposals#10373.

[Mickeon]

Documentation is completely fine. Now it's worth questioning if this is the way to go.

[hakro]

Documentation is completely fine. Now it's worth questioning if this is the way to go.

To be clear, this PR is only to bring Timer on par with SceneTreeTimer, using pretty much the same code.

If a rework of both nodes is to be planned sometime soon, then indeed this PR might not be needed.

[dsnopek]

Thanks! Overall, this change makes sense to me.

I haven't tested it, but I did compare the implementation with SceneTreeTimer and they work the same.

[akien-mga]

Thanks!