[SOLVED]How To Declare A Class In A Script And Then Access That Class Later?

UnknownUser

Hi,

We need a class called "Sprites" which would be located in an existing script. How would we declare the class and how would we access that class's members later on? (please look at below script code - it builds but has error when run)

# "VisualsCore.gd"
extends Node

var ScreenWidth = 1024
var ScreenHeight = 640

class Sprites:
	var SpriteImage = []
	var SpriteActive = []

#----------------------------------------------------------------------------------------
func _ready():
	for index in range(0, 1000):
		Sprites.SpriteImage.append(Sprite.new()) # ERROR: "Invalid get index 'SpriteImage' (on base: 'GDScript')." ?
		Sprites.SpriteActive.append(false)
	
	Sprites.SpriteImage[0].set_texture(preload("res://media/images/backgrounds/TitleBG.png"))
	Sprites.SpriteActive[0] = true
	
	for index in range(0, 1000):
		if Sprites.SpriteActive[index] == true:
			add_child(Sprites.SpriteImage[index])
			Sprites.SpriteImage[index].global_position = Vector2(-99999, -99999)

	pass

#----------------------------------------------------------------------------------------
func DrawSprite(var index, var x, var y, var scaleX, var scaleY):
	if Sprites.SpriteActive[index] == false:
		return false
	
	Sprites.SpriteImage[index].global_position = Vector2(x, y)
	Sprites.SpriteImage[index].scale = Vector2(scaleX, scaleY)

	pass

Thanks!

Jesse www.FallenAngelSoftware.com

UnknownUser

Sorry, forgot the class constructor:

# "VisualsCore.gd"
extends Node

var ScreenWidth = 1024
var ScreenHeight = 640

class SpriteClass:
	var SpriteImage = []
	var SpriteActive = []

var Sprites = SpriteClass.new()

...

Kequc

That looks right to me. I've written and instantiated my own classes a lot, so usually I define them in their own file extending from Resource but I don't think you need to extend from anything.

extends Resource
class_name MyClass

Then elsewhere:

var my_class := MyClass.new()

Or without using class_name. Because it's generally awful currently and causes unending circular reference issues as the entire class is loaded just from defining a type. Instead I'll usually define the type as Resource instead just to avoid issues. Then load the actual class manually for explicitness and clarity.

extends Resource

Then elsewhere:

const MyClass = preload("res://my_class.gd")

----
var my_class := MyClass.new()

Pretty sure either of those solutions is all you need.