==== Notes for everyone ====
  * on the player object, add raycast to camera
  * enable it
  * set cast to to -100 on Z axis (y=0)
  * create a new node, call it weapon
  * map a new input map "primary_fire" mouse button
  * add a script to weapon (default empty)
  * set up some variables for the weapon, track ammo code
<code python>
export var fire_rate = 0.5
export var clip_size = 5
export var reload_rate = 1

var current_ammo = clip_size
var can_fire = true

func _process(delta):
  if Input.is_action_just_pressed("primary_fire") and can_fire:
    print "Fired weapon"

</code>
  * Test that out

<code python>
func _process(delta):
  if Input.is_action_just_pressed("primary_fire") and can_fire:
    print "Fired weapon"
    can_fire = false
    
    yield(get_tree().create_timer(fire_rate), "timeout")
    can_fire = true

</code>

  * Test those changes (try changing the fire rate in the properties box)
  * Simulate reloading
<code python>
func _process(delta):
  if Input.is_action_just_pressed("primary_fire") and can_fire:
    if current_ammo > 0:
      print "Fired weapon"
      can_fire = false
      current_ammo -= 1
    
      yield(get_tree().create_timer(fire_rate), "timeout")
      can_fire = true
    else:
      print "Reloading"
      yield(get_tree().create_timer(reload_rate), "timeout")
      current_ammo = clip_size
      print "Reload complete"

</code>
  * Fix a reload issue (race condition):
<code python>
export var fire_rate = 0.5
export var clip_size = 5
export var reload_rate = 1

var current_ammo = clip_size 
var can_fire = true
var reloading = false

func _process(delta):
  if Input.is_action_just_pressed("primary_fire") and can_fire:
    if current_ammo > 0 and not reloading:
      print "Fired weapon"
      can_fire = false
      current_ammo -= 1
      
      yield(get_tree().create_timer(fire_rate), "timeout")
      
      can_fire = true
    elif not reloading:
      print "Reloading"
      reloading = true
      yield(get_tree().create_timer(reload_rate), "timeout")
      current_ammo = clip_size
      reloading = false
      print "Reload complete"
</code>

  * Add a child node to the world, a static body, add a meshinstance to it as a child, called it enemy, make it a sphere
  * Add a child node to the staticbody, a collision shape sphere
  * Assign it to a group, (properties, node, "enemies")
  * add new function:
<code python>
onready var raycast = $"../Head/Camera/RayCast"
func check_collision():
  if raycast.is_colliding():
    var collider = raycast.get_collider()
     if collider.is_in_group("enemies"):
       collider.queue_free()
       print("Killed "+collider.name)
</code>