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hella-farm/behaviours/spawner_choice.gd

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GDScript

extends Node
class_name SpawnerChoice
@export var spawners: Array[Spawner] = []
@export var weights: Array[int] = []
func compute_total_weight() -> int:
var total = 0
for weight in weights:
if weight < 0:
Log.e(self, "Weight with negative value detected.")
total += weight
return total
func select_spawner() -> Spawner:
var total = compute_total_weight()
var sampled = Random.rng.randi_range(0, total - 1)
var idx = -1
while sampled >= 0:
idx += 1
sampled -= weights[idx]
return spawners[idx]
func spawn():
select_spawner().spawn()
func _ready():
if len(spawners) != len(weights):
Log.e(self, "Spawners and weights are different lengths.")
if compute_total_weight() <= 0:
Log.e(self, "Weight total is less or equal to 0.")