Do I use raycasts to do this?
Raycasts are used to check for collisions in a straight (and potentially very long) line. They can figure out the target of an instant-hit-weapon, but won't help here.
All you need to to do is spawn multiple instances of your bullet-scene in the same location, change their rotation and then let them all travel in a straight line.
1) Create a bullet-scene, for simplicity I'll simply assume a Sprite:
var direction = Vector2(1, 0)
var speed = 400 # pixels / s
global_position += direction * speed * delta
2) Create a player scene. For simplicity I'll again assume a Sprite. Once the player hits the right key, we need to call a
shoot-method to spawn the bullets:
const BULLET_SCENE = preload("res://Bullet.tscn")
var aim_direction = Vector2.RIGHT
if event is InputEventKey and event.pressed:
if event.scancode == KEY_SPACE:
3) Also we need to ake the aim direction controllable with the mouse:
aim_direction = global_position.direction_to(get_global_mouse_position())
4) Now we've everything we need to implement the
for angle in [-45, -22.5, 0, 22.5, 45]:
var radians = deg2rad(angle)
var bullet = BULLET_SCENE.instance()
bullet.direction = aim_direction.rotated(radians)
bullet.global_position = self.global_position