extends Camera2D

var PAN_SPEED = 30
var is_panning
var pan_start = Vector2.ZERO
# 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):
	if Input.is_action_pressed("ui_left"):
		position.x -= 3
	if Input.is_action_pressed("ui_right"):
		position.x += 3
	if Input.is_action_pressed("ui_up"):
		position.y -= 3
	if Input.is_action_pressed("ui_down"):
		position.y += 3
		
	if is_panning:
		var pan_delta = (pan_start - get_viewport().get_mouse_position()) / get_zoom() * delta * PAN_SPEED
		position += pan_delta
		pan_start = get_viewport().get_mouse_position()
	pass

func _input(event):
	if Input.is_mouse_button_pressed(MOUSE_BUTTON_MIDDLE):
		is_panning = true
		pan_start = event.position
	else:
		is_panning = false