Movement controller for a character

robot.gd

extends KinematicBody2D

# class member variables go here, for example:
# var a = 2
# var b = "textvar"
var velocity = Vector2()
const WALK_SPEED = 200.0

func _ready():
	# Called every time the node is added to the scene.
	# Initialization here
	set_fixed_process(true)

func _fixed_process(delta):
	velocity.x = 0.0
	velocity.y = 0.0

	if (Input.is_action_pressed("ui_left") and Input.is_action_pressed("ui_right")):
		velocity.x = 0.0
	elif (Input.is_action_pressed("ui_left")):
		velocity.x = -1.0
	elif (Input.is_action_pressed("ui_right")):
		velocity.x = 1.0

	if (Input.is_action_pressed("ui_up") and Input.is_action_pressed("ui_down")):
		velocity.y = 0.0
	elif (Input.is_action_pressed("ui_up")):
		velocity.y = -1.0
	elif (Input.is_action_pressed("ui_down")):
		velocity.y = 1.0

	var motion = velocity.normalized() * delta * WALK_SPEED
	move(motion)