So I have a dictionary that’s an autoload/global and I have ‘actors’ or game entities that inherit from class_name DEMO_actor for the time being that registers to the dictionary upon _ready() and assigns them a unique ID as their dictionary key and I’m trying to send information to and from each actor within the dictionary.
I want use this system so if, say:
- actor1 lands a hit on actor2 in the form of a message
- so then actor2 knows that actor1 got them
- so actor2 can send another message to actor1 to affect some value within actor1 (like incrementing a score or something).
I’d prefer to use system over using signals, I personally find it more flexible and easier/quicker to set up. Also keeping a database like this allows me to read and write the positions, states and other variables of each game actor for a save/load system
I have been trying to test this out, this is my code…
actor_manager.gd: (this is the autoload)
class_name Actor_Manager extends Node
var validID :int
var actor_Database :Dictionary
func RegisterActor(appli :DEMO_actor) -> void:
actor_Database[appli] = validID
appli.AssignID(validID)
validID += 1 #increment ID for next actor
func GetActorFromID(request :int) -> DEMO_actor:
return actor_Database.get(request)
test_base_actor.gd: (abstract base class)
class_name DEMO_actor extends Node3D
var actor_ID :int
func RegisterToManager() -> void:
ActorManager.RegisterActor(self)
print("Registered to database with ID of ", actor_ID)
func AssignID(given_id :int) -> void:
actor_ID = given_id
func GetMessage(msg_Type :int) -> void:
pass #used by inheriting classes
and the two inheriting/concrete classes…
dummy_actor.gd: (this class RECEIVES messages)
class_name Dummy_actor extends DEMO_actor
func _ready() -> void:
RegisterToManager() #register to database
func GetMessage(msg_Type :int) -> void:
match msg_Type:
1:
print("got message type 1")
2:
print("got message type 2")
3:
print("got message type 3")
_:
print("unknown message type")
msg_actor.gd: (this class SENDS messages)
class_name Message_Actor extends DEMO_actor
func _ready() -> void:
RegisterToManager()
func _process(delta: float) -> void:
if Input.is_action_just_pressed("button_1"):
SendMessageToActor(0,1) #send message type 1 to ID 0
if Input.is_action_just_pressed("button_2"):
SendMessageToActor(0,2) #send message type 2 to ID 0
if Input.is_action_just_pressed("button_3"):
SendMessageToActor(0,3) #send message type 3 to ID 0
func SendMessageToActor(msg_To :int, mssg_Type :int) -> void:
ActorManager.GetActorFromID(msg_To).GetMessage(mssg_Type)
The problem is
I got two Node3Ds, one has dummy_actor attached and the other msg_actor.gd and when I run the scene and push a button I get a Invalid call. Nonexistant function 'GetMessage' in base 'Nil'. in the Stack Trace. I clearly have a GetMessage function in my DEMO_actor class so what am I getting wrong here? please help 
Thank you!
