Weighted Random

RandomWeighted.cs

private int RandomWeighted(List<int> weights)
        {
            int accumulatedWeigts = 0;
            for (int i = 0; i < weights.Count; i++)
            {
                accumulatedWeigts += weights[i];
                weights[i] = accumulatedWeigts;
            }

            //If accumulated weights is 0, choose random index. Otherwise, logic would always select 1st element
            if (accumulatedWeigts == 0)
            {
                return UnityEngine.Random.Range(0, accumulatedWeigts + 1);
            }

            var rollResult = Randomizer.Roll(Randomizer.EventType.DecisionMaker, 0, accumulatedWeigts + 1);
            for (int i = 0; i < weights.Count; i++)
            {
                if (rollResult <= weights[i])
                {
                    return i;
                }
            }
            
            Debug.LogError($"No weights provided for weighted random!");
            return 0;
        }