extends Spatial

onready var camera := $Camera

var mouseOrigin: Vector2
var lastCameraTransform: Transform

func _input(event: InputEvent):
	# Camera zoom
	if event.is_action("zoom_in"):
		camera.zoom(true)
	elif event.is_action("zoom_out"):
		camera.zoom(false)
	# Save original camera and mouse position before panning
	if event.is_action_pressed("pan"):
		mouseOrigin = get_viewport().get_mouse_position()
		lastCameraTransform = camera.transform

func _process(delta: float):
	# If panning, translate mouse delta to camera delta
	if Input.is_action_pressed("pan"):
		var mouseDelta := get_viewport().get_mouse_position() - mouseOrigin
		var mousePos: Vector2 = mouseDelta * 0.0096 * (1-camera.getZoomLevel()/5) # Magic numbers everywhere
		camera.transform.origin = lastCameraTransform.origin - Vector3(mousePos.x, 0, mousePos.y)