@tool
extends MultiMeshInstance3D

@export var extents := Vector2.ONE
@export var scale_basic := 1.0
@export var refresh: bool:
    get: return false
    set(_value):
        refresh_grass()

func refresh_grass() -> void:
    var rng := RandomNumberGenerator.new()
    rng.randomize()

    for instance_index in multimesh.instance_count:
        var scale: float = rng.randf_range(scale_basic - 0.1, scale_basic + 0.1)
        var transform := Transform3D().rotated(Vector3.UP, 0).scaled(Vector3.ONE * scale)
        var x: float
        var z: float
        x = rng.randf_range(-extents.x, extents.x)
        z = rng.randf_range(-extents.y, extents.y)

        transform.origin = Vector3(x, 0, z)

        multimesh.set_instance_transform(instance_index, transform)