CommonDropWithRerolls.cs

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using System.Collections.Generic;
 
namespace Terraria.GameContent.ItemDropRules;
 
public class CommonDropWithRerolls : CommonDrop
{
    public int timesToRoll;
 
    public CommonDropWithRerolls(int itemId, int chanceDenominator, int amountDroppedMinimum, int amountDroppedMaximum, int rerolls)
        : base(itemId, chanceDenominator, amountDroppedMinimum, amountDroppedMaximum)
    {
        timesToRoll = rerolls + 1;
    }
 
    public override ItemDropAttemptResult TryDroppingItem(DropAttemptInfo info)
    {
        bool flag = false;
        for (int i = 0; i < timesToRoll; i++)
        {
            flag = flag || info.player.RollLuck(chanceDenominator) < chanceNumerator;
        }
        ItemDropAttemptResult result;
        if (flag)
        {
            CommonCode.DropItemFromNPC(info.npc, itemId, info.rng.Next(amountDroppedMinimum, amountDroppedMaximum + 1));
            result = default(ItemDropAttemptResult);
            result.State = ItemDropAttemptResultState.Success;
            return result;
        }
        result = default(ItemDropAttemptResult);
        result.State = ItemDropAttemptResultState.FailedRandomRoll;
        return result;
    }
 
    public override void ReportDroprates(List<DropRateInfo> drops, DropRateInfoChainFeed ratesInfo)
    {
        float num = (float)chanceNumerator / (float)chanceDenominator;
        float num2 = 1f - num;
        float num3 = 1f;
        for (int i = 0; i < timesToRoll; i++)
        {
            num3 *= num2;
        }
        float num4 = 1f - num3;
        float dropRate = num4 * ratesInfo.parentDroprateChance;
        drops.Add(new DropRateInfo(itemId, amountDroppedMinimum, amountDroppedMaximum, dropRate, ratesInfo.conditions));
        Chains.ReportDroprates(base.ChainedRules, num4, drops, ratesInfo);
    }
}