BuildingCamera.gd

extends Camera2D

var _target_zoom: float = 1.0

const MIN_ZOOM: float = 0.5
const MAX_ZOOM: float = 2.0
const ZOOM_INCREMENT: float = 0.2

const ZOOM_RATE: float = 8.0

# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	pass

func _physics_process(delta):
	zoom = lerp(
		zoom,
		_target_zoom * Vector2.ONE,
		ZOOM_RATE * delta
		)
	set_physics_process(
		not is_equal_approx(zoom.x, _target_zoom)
	)

func _input(event: InputEvent):
	if event is InputEventMouseMotion:
		if event.button_mask == MOUSE_BUTTON_MASK_RIGHT:
			position -= event.relative
	if event is InputEventMouseButton:
		if event.is_pressed():
			if event.button_index == MOUSE_BUTTON_WHEEL_UP:
				zoom_in()
			if event.button_index == MOUSE_BUTTON_WHEEL_DOWN:
				zoom_out()

func zoom_out():
	_target_zoom = max(_target_zoom - ZOOM_INCREMENT, MIN_ZOOM)
	set_physics_process(true)

func zoom_in():
	_target_zoom = min(_target_zoom + ZOOM_INCREMENT, MAX_ZOOM)
	set_physics_process(true)