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#pragma once
#include "BlockPlant.h"
/** Handler for stems from which produce grows in an adjacent block (melon, pumpkin) after it becomes ripe (meta == 7).
ProduceBlockType is the blocktype for the produce to be grown.
StemPickupType is the item type for the pickup resulting from breaking the stem. */
template <BLOCKTYPE ProduceBlockType, ENUM_ITEM_TYPE StemPickupType>
class cBlockStemsHandler final : public cBlockPlant<true>
{
using Super = cBlockPlant<true>;
public:
using Super::Super;
private:
virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
{
/*
Use correct percent:
https://minecraft.wiki/w/Melon_Seeds#Breaking
https://minecraft.wiki/w/Pumpkin_Seeds#Breaking
*/
// Age > 7 (Impossible)
if (a_BlockMeta > 7)
{
return cItem(StemPickupType);
}
const auto Threshold = GetRandomProvider().RandReal<double>(100);
double Cumulative = 0;
char Count = 0;
for (; Count < 4; Count++)
{
Cumulative += m_AgeSeedDropProbability[static_cast<size_t>(a_BlockMeta)][static_cast<size_t>(Count)];
if (Cumulative > Threshold)
{
break;
}
}
return cItem(StemPickupType, Count);
}
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;
}
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, 7);
a_Chunk.SetMeta(a_RelPos, NewMeta);
return NewMeta - OldMeta;
}
virtual void BearFruit(cChunk & a_Chunk, const Vector3i a_StemRelPos) const override
{
auto & Random = GetRandomProvider();
// Check if there's another produce around the stem, if so, abort:
static constexpr std::array<Vector3i, 4> NeighborOfs = {{
{1, 0, 0},
{-1, 0, 0},
{0, 0, 1},
{0, 0, -1},
}};
std::array<BLOCKTYPE, 4> BlockType;
if (!a_Chunk.UnboundedRelGetBlockType(a_StemRelPos + NeighborOfs[0], BlockType[0]) ||
!a_Chunk.UnboundedRelGetBlockType(a_StemRelPos + NeighborOfs[1], BlockType[1]) ||
!a_Chunk.UnboundedRelGetBlockType(a_StemRelPos + NeighborOfs[2], BlockType[2]) ||
!a_Chunk.UnboundedRelGetBlockType(a_StemRelPos + NeighborOfs[3], BlockType[3]) ||
(BlockType[0] == ProduceBlockType) || (BlockType[1] == ProduceBlockType) ||
(BlockType[2] == ProduceBlockType) || (BlockType[3] == ProduceBlockType))
{
// Neighbors not valid or already taken by the same produce:
return;
}
// Pick a direction in which to place the produce:
int x = 0, z = 0;
const auto CheckType =
Random.RandInt<size_t>(3); // The index to the neighbors array which should be checked for emptiness
switch (CheckType)
{
case 0: x = 1; break;
case 1: x = -1; break;
case 2: z = 1; break;
case 3: z = -1; break;
}
// Check that the block in that direction is empty:
switch (BlockType[CheckType])
{
case E_BLOCK_AIR:
case E_BLOCK_SNOW:
case E_BLOCK_TALL_GRASS:
case E_BLOCK_DEAD_BUSH:
{
break;
}
default: return;
}
// Check if there's soil under the neighbor. We already know the neighbors are valid. Place produce if ok
BLOCKTYPE SoilType;
const auto ProduceRelPos = a_StemRelPos + Vector3i(x, 0, z);
VERIFY(a_Chunk.UnboundedRelGetBlockType(ProduceRelPos.addedY(-1), SoilType));
switch (SoilType)
{
case E_BLOCK_DIRT:
case E_BLOCK_GRASS:
case E_BLOCK_FARMLAND:
{
const NIBBLETYPE Meta =
(ProduceBlockType == E_BLOCK_MELON) ? 0 : static_cast<NIBBLETYPE>(Random.RandInt(4) % 4);
FLOGD(
"Growing melon / pumpkin at {0} (<{1}, {2}> from stem), overwriting {3}, growing on top of {4}, "
"meta {5}",
a_Chunk.RelativeToAbsolute(ProduceRelPos),
x,
z,
ItemTypeToString(BlockType[CheckType]),
ItemTypeToString(SoilType),
Meta
);
// Place a randomly-facing produce:
a_Chunk.SetBlock(ProduceRelPos, ProduceBlockType, Meta);
}
}
}
private:
// https://minecraft.wiki/w/Pumpkin_Seeds#Breaking
// https://minecraft.wiki/w/Melon_Seeds#Breaking
/** The array describes how many seed may be dropped at which age. The inner arrays describe the probability to drop
0, 1, 2, 3 seeds. The outer describes the age of the stem. */
static constexpr std::array<std::array<double, 4>, 8> m_AgeSeedDropProbability {
{{81.3, 17.42, 1.24, 0.03},
{65.1, 30.04, 4.62, 0.24},
{51.2, 38.4, 9.6, 0.8},
{39.44, 43.02, 15.64, 1.9},
{29.13, 44.44, 22.22, 3.7},
{21.6, 43.2, 28.8, 6.4},
{15.17, 39.82, 34.84, 10.16},
{10.16, 34.84, 39.82, 15.17}}
};
};
using cBlockMelonStemHandler = cBlockStemsHandler<E_BLOCK_MELON, E_ITEM_MELON_SEEDS>;
using cBlockPumpkinStemHandler = cBlockStemsHandler<E_BLOCK_PUMPKIN, E_ITEM_PUMPKIN_SEEDS>;
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