class_name GenerationFeature extends Node3D
## Base class for world features generated during worldgen.
##
## Layers contain features. Some features may contain layers.

@export var noise_scale := Vector3.ONE
@export var noise_offset := Vector3.ZERO

@export var sub_layers: Array[GenerationLayer]

var _generated := false


func probe() -> void:
	# TODO may want to make low-detail & high-detail probes distinct
	if not _generated:
		generate()
		_generated = true

	for layer in sub_layers:
		layer.probe()


## Generate elements of this feature. Called by default on the first call to `probe`
func generate() -> void:
	pass  # Implemented in derived type


func sample_noise() -> float:
	var sample_point := global_position * noise_scale + noise_offset
	return WorldGenManager.noise.get_noise_3dv(sample_point)