multimeshinstancing3D (broken)

extends Node3D

@onready var high: MultiMeshInstance3D = $_LOD_1
@onready var mid: MultiMeshInstance3D = $_LOD_2
@onready var low: MultiMeshInstance3D = $_LOD_3

#how many objects in total
@export var instance_count: int = 40
#max number visible at once, -1 = all
@export var visible_instance_count: int = -1
# Overall universal scale of the three models
@export var tree_scale: float = 1.0  # Editable in Inspector

func _ready() -> void:
    apply_uniform_scale(tree_scale)

    _LOD_1_visible_vars()
    _LOD_2_visible_vars()
    _LOD_3_visible_vars()

    _populate_multimesh(high, 10)
    _populate_multimesh(mid, 10)
    _populate_multimesh(low, 10)

func apply_uniform_scale(new_scale: float) -> void:
    tree_scale = new_scale
    var uniform_scale = Vector3(tree_scale, tree_scale, tree_scale)

    high.scale = uniform_scale
    mid.scale = uniform_scale
    low.scale = uniform_scale

# LOD 1 Visibility
func _LOD_1_visible_vars():
    high.visibility_range_begin = 0.0
    high.visibility_range_begin_margin = 4.5
    high.visibility_range_end = 6.0
    high.visibility_range_end_margin = 6.5

# LOD 2 Visibility
func _LOD_2_visible_vars():
    mid.visibility_range_begin = 6.0
    mid.visibility_range_begin_margin = 12.5
    mid.visibility_range_end = 18.0
    mid.visibility_range_end_margin = 18.5

# LOD 3 Visibility
func _LOD_3_visible_vars():
    low.visibility_range_begin = 18.0
    low.visibility_range_begin_margin = 22.5
    low.visibility_range_end = 35.0
    low.visibility_range_end_margin = 36.0

# Populates MultiMesh with instances
func _populate_multimesh(multimesh_instance: MultiMeshInstance3D, count: int):
    if multimesh_instance.multimesh == null:
        return  # Ensure MultiMesh exists

    multimesh_instance.multimesh.instance_count = count

    for i in range(count):
        var xform = Transform3D()
        xform.origin = Vector3(randf() * 10, 5, randf() * 10)  # Ensures objects are visible
        multimesh_instance.multimesh.set_instance_transform(i, xform)

# Debugging Visibility
func _process(delta: float) -> void:
    print("LOD 1 Instances: ", high.multimesh.instance_count)
    print("LOD 2 Instances: ", mid.multimesh.instance_count)
    print("LOD 3 Instances: ", low.multimesh.instance_count)