mirror of
https://github.com/Steffo99/hella-farm.git
synced 2024-11-23 00:24:21 +00:00
29 lines
594 B
GDScript
29 lines
594 B
GDScript
extends Sampler
|
|
class_name SamplerWeighted
|
|
|
|
|
|
## Sample a random reference from the array, considering the given weights.
|
|
|
|
|
|
@export var weights: Array[int] = []
|
|
|
|
|
|
func sample() -> Node:
|
|
var total = compute_total_weight()
|
|
if total == 0:
|
|
return null
|
|
var sampled = Random.rng.randi_range(0, total - 1)
|
|
var idx = -1
|
|
while sampled >= 0:
|
|
idx += 1
|
|
sampled -= weights[idx]
|
|
return possibilities[idx]
|
|
|
|
func compute_total_weight() -> int:
|
|
var total = 0
|
|
for weight in weights:
|
|
if weight < 0:
|
|
Log.e(self, "Weight with negative value detected.")
|
|
return 0
|
|
total += weight
|
|
return total
|