CommonDrop.cs

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using System.Collections.Generic;
 
namespace Terraria.GameContent.ItemDropRules;
 
public class CommonDrop : IItemDropRule
{
    public int itemId;
 
    public int chanceDenominator;
 
    public int amountDroppedMinimum;
 
    public int amountDroppedMaximum;
 
    public int chanceNumerator;
 
    public List<IItemDropRuleChainAttempt> ChainedRules { get; private set; }
 
    public CommonDrop(int itemId, int chanceDenominator, int amountDroppedMinimum = 1, int amountDroppedMaximum = 1, int chanceNumerator = 1)
    {
        this.itemId = itemId;
        this.chanceDenominator = chanceDenominator;
        this.amountDroppedMinimum = amountDroppedMinimum;
        this.amountDroppedMaximum = amountDroppedMaximum;
        this.chanceNumerator = chanceNumerator;
        ChainedRules = new List<IItemDropRuleChainAttempt>();
    }
 
    public virtual bool CanDrop(DropAttemptInfo info)
    {
        return true;
    }
 
    public virtual ItemDropAttemptResult TryDroppingItem(DropAttemptInfo info)
    {
        ItemDropAttemptResult result;
        if (info.player.RollLuck(chanceDenominator) < chanceNumerator)
        {
            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 virtual void ReportDroprates(List<DropRateInfo> drops, DropRateInfoChainFeed ratesInfo)
    {
        float num = (float)chanceNumerator / (float)chanceDenominator;
        float dropRate = num * ratesInfo.parentDroprateChance;
        drops.Add(new DropRateInfo(itemId, amountDroppedMinimum, amountDroppedMaximum, dropRate, ratesInfo.conditions));
        Chains.ReportDroprates(ChainedRules, num, drops, ratesInfo);
    }
}