125df19477
* When the cause of destruction was world-induced (CanBeAt check failed) there is no tool. Pass the nullptr directly to ConvertToPickups and let it handle it. * Fixes #4795 - Remove unused a_Digger parameter to ConvertToPickups.
134 lines
3.1 KiB
C++
134 lines
3.1 KiB
C++
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#pragma once
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#include "BlockPlant.h"
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#include "../FastRandom.h"
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/** Common class that takes care of beetroots, carrots, potatoes and wheat */
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template <NIBBLETYPE RipeMeta>
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class cBlockCropsHandler final :
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public cBlockPlant<true>
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{
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using Super = cBlockPlant<true>;
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public:
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using Super::Super;
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private:
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/** Calculate the number of seeds to drop when the crop is broken. */
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static char CalculateSeedCount(char a_Min, char a_BaseRolls, unsigned char a_FortuneLevel)
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{
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std::binomial_distribution<> Binomial(a_BaseRolls + a_FortuneLevel, 0.57);
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return static_cast<char>(a_Min + Binomial(GetRandomProvider().Engine()));
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}
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virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
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{
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auto & rand = GetRandomProvider();
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// If not fully grown, drop the "seed" of whatever is growing:
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if (a_BlockMeta < RipeMeta)
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{
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switch (m_BlockType)
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{
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case E_BLOCK_BEETROOTS: return cItem(E_ITEM_BEETROOT_SEEDS);
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case E_BLOCK_CROPS: return cItem(E_ITEM_SEEDS);
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case E_BLOCK_CARROTS: return cItem(E_ITEM_CARROT);
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case E_BLOCK_POTATOES: return cItem(E_ITEM_POTATO);
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}
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ASSERT(!"Unhandled block type");
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return {};
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}
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// Fully grown, drop the crop's produce:
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cItems Res;
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switch (m_BlockType)
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{
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case E_BLOCK_BEETROOTS:
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{
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const auto SeedCount = CalculateSeedCount(0, 3, ToolFortuneLevel(a_Tool));
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Res.Add(E_ITEM_BEETROOT_SEEDS, SeedCount);
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Res.Add(E_ITEM_BEETROOT);
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break;
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}
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case E_BLOCK_CROPS:
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{
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// https://minecraft.fandom.com/wiki/Seeds_(Wheat)
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Res.Add(E_ITEM_WHEAT);
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const auto SeedCount = CalculateSeedCount(1, 3, ToolFortuneLevel(a_Tool));
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Res.Add(E_ITEM_SEEDS, SeedCount);
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break;
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}
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case E_BLOCK_CARROTS:
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{
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// https://minecraft.gamepedia.com/Carrot#Breaking
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const auto CarrotCount = CalculateSeedCount(1, 4, ToolFortuneLevel(a_Tool));
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Res.Add(E_ITEM_CARROT, CarrotCount);
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break;
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}
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case E_BLOCK_POTATOES:
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{
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// https://minecraft.gamepedia.com/Potato#Breaking
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const auto PotatoCount = CalculateSeedCount(2, 3, ToolFortuneLevel(a_Tool));
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Res.Add(E_ITEM_POTATO, PotatoCount);
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if (rand.RandBool(0.02))
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{
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// https://minecraft.gamepedia.com/Poisonous_Potato#Obtaining
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// With a 2% chance, drop a poisonous potato as well:
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Res.Add(E_ITEM_POISONOUS_POTATO);
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}
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break;
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}
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default:
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{
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ASSERT(!"Unhandled block type");
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break;
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}
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} // switch (m_BlockType)
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return Res;
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}
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virtual int Grow(cChunk & a_Chunk, Vector3i a_RelPos, int a_NumStages = 1) const override
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{
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const auto OldMeta = a_Chunk.GetMeta(a_RelPos);
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const auto NewMeta = std::clamp<NIBBLETYPE>(static_cast<NIBBLETYPE>(OldMeta + a_NumStages), 0, RipeMeta);
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a_Chunk.SetMeta(a_RelPos, NewMeta);
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return NewMeta - OldMeta;
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}
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virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, const Vector3i a_RelPos, const cChunk & a_Chunk) const override
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{
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return ((a_RelPos.y > 0) && (a_Chunk.GetBlock(a_RelPos.addedY(-1)) == E_BLOCK_FARMLAND));
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}
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virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
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{
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UNUSED(a_Meta);
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return 7;
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}
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};
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