Pan/Zoom Camera2D Script (Godot 4.4)

camera.gd

extends Camera2D

const MIN_ZOOM: float = 1.0
const MAX_ZOOM: float = 16.0

const PAN_SPEED: float = 2000
const ZOOM_SPEED: float = 1.1
const ZOOM_INTERVAL: float = 0.1

var zoom_tween: Tween
var zoom_level: float = 1.0:
	set(value):
		zoom_level = clamp(value, MIN_ZOOM, MAX_ZOOM)
		if zoom_tween:
			zoom_tween.kill()
		zoom_tween = create_tween()
		zoom_tween.tween_property(self, "zoom", Vector2.ONE / zoom_level, ZOOM_INTERVAL)

func _ready() -> void:
	zoom_level = 3.0

func _process(delta: float) -> void:
	var input_direction := Input.get_vector("left", "right", "up", "down")
	position += input_direction * delta * PAN_SPEED * zoom_level

func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventMouseButton and event.pressed:
		match event.button_index:
			MOUSE_BUTTON_WHEEL_UP:
				zoom_level /= ZOOM_SPEED
			MOUSE_BUTTON_WHEEL_DOWN:
				zoom_level *= ZOOM_SPEED