How do I change property of instanced scene?

Help
1

Godot Version 4.2.1

Question

I have my level scene level.tscn and it’s script level.gd. And I have platform scene platform.tscn and it’s script platform.gd.

platform.gd

extends Node3D

# Custom property
var length: float = 1.0

level.gd

extends Node3D

var platform_scn = preload("res://platform.tscn")

func ready() -> void:
    var platform = platform.instantiate()
    
    # I want to change length property of platform here
    # I tried this
    platform.length = 50.0
    add_child(platform)

But this is not working.

2

You aren’t adding it to the scene, and you’re in a method that’s never called, what you need to do is:

func _ready() -> void:
    var platform = platform.instantiate()

    platform.length = 50.0
    add_child(platform)
3

Oh I forgot to mention I did added it to scene using add_child(). It is showing in the level but length property never get called:

var length: float = 1.0:
    set(value):
        length = value
        print("Value change!")

This doesn’t ge print when I set the length property

4

Please do make sure your code is the real code or no one can help you with it :slight_smile: The code doesn’t have that setter

5

This is not the real code this is just a presentation of it to understand the question. My question is I instantiating a scene which has length property I wan to change it with my main scene.

6

It should work, but impossible to tell what might be wrong with your example :slight_smile:

7

I have my level scene level.tscn which has MeshInstance3D as root and it’s script level.gd . And I have platform scene platform.tscn and it’s script platform.gd .

level.gd

extends Node3D

var platform_scn = preload("res://platform.tscn")

func _ready() -> void:
	var platform = platform_scn.instantiate()
	platform.transform.origin = Vector3.LEFT
	platform.length = 100.0
	
	add_child(platform)

platform.gd

extends MeshInstance3D

@export var length: float = 1.0:
	set(value):
		length = value
		mesh.size.x = value
		

func _ready() -> void:
	mesh = BoxMesh.new()
	mesh.size = Vector3(length, 20, 8)

This is the real code. Origin of platform changed but size.x not changed when I set length.

8

Does it work if you do:

mesh.size = Vector3(value, mesh.size.y, mesh.size.z)
9

It does even in level.gd when I do it.

platform.mesh.size = Vector3(100.0, platform.mesh.size.y, platform.mesh.size.z)

or this

platform.mesh.size.x = 100

but I can’t modify custom defined length property