BlockCrops.h

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#pragma once
 
#include "BlockPlant.h"
#include "../FastRandom.h"
 
 
 
 
 
template <NIBBLETYPE RipeMeta>
class cBlockCropsHandler final :
    public cBlockPlant<true>
{
    using Super = cBlockPlant<true>;
 
public:
 
    using Super::Super;
 
private:
 
    static char CalculateSeedCount(char a_Min, char a_BaseRolls, unsigned char a_FortuneLevel)
    {
        std::binomial_distribution<> Binomial(a_BaseRolls + a_FortuneLevel, 0.57);
        return static_cast<char>(a_Min + Binomial(GetRandomProvider().Engine()));
    }
 
 
 
 
 
    virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
    {
        auto & rand = GetRandomProvider();
 
        // If not fully grown, drop the "seed" of whatever is growing:
        if (a_BlockMeta < RipeMeta)
        {
            switch (m_BlockType)
            {
                case E_BLOCK_BEETROOTS: return cItem(E_ITEM_BEETROOT_SEEDS);
                case E_BLOCK_CROPS:     return cItem(E_ITEM_SEEDS);
                case E_BLOCK_CARROTS:   return cItem(E_ITEM_CARROT);
                case E_BLOCK_POTATOES:  return cItem(E_ITEM_POTATO);
            }
 
            ASSERT(!"Unhandled block type");
            return {};
        }
 
        // Fully grown, drop the crop's produce:
        cItems Res;
 
        switch (m_BlockType)
        {
            case E_BLOCK_BEETROOTS:
            {
                const auto SeedCount = CalculateSeedCount(0, 3, ToolFortuneLevel(a_Tool));
                Res.Add(E_ITEM_BEETROOT_SEEDS, SeedCount);
                Res.Add(E_ITEM_BEETROOT);
                break;
            }
            case E_BLOCK_CROPS:
            {
                // https://minecraft.wiki/w/Seeds_(Wheat)
                Res.Add(E_ITEM_WHEAT);
                const auto SeedCount = CalculateSeedCount(1, 3, ToolFortuneLevel(a_Tool));
                Res.Add(E_ITEM_SEEDS, SeedCount);
                break;
            }
            case E_BLOCK_CARROTS:
            {
                // https://minecraft.wiki/w/Carrot#Breaking
                const auto CarrotCount = CalculateSeedCount(1, 4, ToolFortuneLevel(a_Tool));
                Res.Add(E_ITEM_CARROT, CarrotCount);
                break;
            }
            case E_BLOCK_POTATOES:
            {
                // https://minecraft.wiki/w/Potato#Breaking
                const auto PotatoCount = CalculateSeedCount(2, 3, ToolFortuneLevel(a_Tool));
                Res.Add(E_ITEM_POTATO, PotatoCount);
                if (rand.RandBool(0.02))
                {
                    // https://minecraft.wiki/w/Poisonous_Potato#Obtaining
                    // With a 2% chance, drop a poisonous potato as well:
                    Res.Add(E_ITEM_POISONOUS_POTATO);
                }
                break;
            }
            default:
            {
                ASSERT(!"Unhandled block type");
                break;
            }
        }  // switch (m_BlockType)
        return Res;
    }
 
 
 
 
 
    virtual int Grow(cChunk & a_Chunk, Vector3i a_RelPos, int a_NumStages = 1) const override
    {
        const auto OldMeta = a_Chunk.GetMeta(a_RelPos);
        const auto NewMeta = std::clamp<NIBBLETYPE>(static_cast<NIBBLETYPE>(OldMeta + a_NumStages), 0, RipeMeta);
        a_Chunk.SetMeta(a_RelPos, NewMeta);
        return NewMeta - OldMeta;
    }
 
 
 
 
 
    virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
    {
        return (a_Position.y > 0) && (a_Chunk.GetBlock(a_Position.addedY(-1)) == E_BLOCK_FARMLAND);
    }
 
 
 
 
 
    virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
    {
        UNUSED(a_Meta);
        return 7;
    }
};