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#pragma once
#include "BlockPlant.h"
#include "../BlockInfo.h"
class cBlockCactusHandler final :
public cClearMetaOnDrop<cBlockPlant<false>>
{
using Super = cClearMetaOnDrop<cBlockPlant<false>>;
public:
using Super::Super;
private:
virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
{
const auto SurfacePosition = a_Position.addedY(-1);
if (!cChunkDef::IsValidHeight(SurfacePosition))
{
return false;
}
BLOCKTYPE Surface = a_Chunk.GetBlock(SurfacePosition);
if ((Surface != E_BLOCK_SAND) && (Surface != E_BLOCK_CACTUS))
{
// Cactus can only be placed on sand and itself
return false;
}
// Check surroundings. Cacti may ONLY be surrounded by non-solid blocks
static const Vector3i Coords[] =
{
{-1, 0, 0},
{ 1, 0, 0},
{ 0, 0, -1},
{ 0, 0, 1},
};
for (size_t i = 0; i < ARRAYCOUNT(Coords); i++)
{
BLOCKTYPE BlockType;
NIBBLETYPE BlockMeta;
if (
a_Chunk.UnboundedRelGetBlock(a_Position + Coords[i], BlockType, BlockMeta) &&
(
cBlockInfo::IsSolid(BlockType) ||
(BlockType == E_BLOCK_LAVA) ||
(BlockType == E_BLOCK_STATIONARY_LAVA)
)
)
{
return false;
}
} // for i - Coords[]
return true;
}
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
{
// Check the total height of the cacti blocks here:
auto Top = a_RelPos.addedY(1);
while (
cChunkDef::IsValidHeight(Top) &&
(a_Chunk.GetBlock(Top) == E_BLOCK_CACTUS)
)
{
Top.y++;
}
auto Bottom = a_RelPos.addedY(-1);
while (
cChunkDef::IsValidHeight(Bottom) &&
(a_Chunk.GetBlock(Bottom) == E_BLOCK_CACTUS)
)
{
--Bottom.y;
}
// Refuse if already too high:
auto numToGrow = std::min(a_NumStages, a_Chunk.GetWorld()->GetMaxCactusHeight() + 1 - (Top.y - Bottom.y));
if (numToGrow <= 0)
{
return 0;
}
BLOCKTYPE blockType;
for (int i = 0; i < numToGrow; ++i)
{
auto NewTop = Top.addedY(i);
if (!a_Chunk.UnboundedRelGetBlockType(NewTop, blockType) || (blockType != E_BLOCK_AIR))
{
// Cannot grow there
return i;
}
a_Chunk.UnboundedRelFastSetBlock(NewTop, E_BLOCK_CACTUS, 0);
// Check surroundings. Cacti may ONLY be surrounded by non-solid blocks; if they aren't, drop as pickup and bail out the growing
static const Vector3i neighborOffsets[] =
{
{-1, 0, 0},
{ 1, 0, 0},
{ 0, 0, -1},
{ 0, 0, 1},
} ;
for (const auto & ofs: neighborOffsets)
{
if (
a_Chunk.UnboundedRelGetBlockType(NewTop + ofs, blockType) &&
(
cBlockInfo::IsSolid(blockType) ||
(blockType == E_BLOCK_LAVA) ||
(blockType == E_BLOCK_STATIONARY_LAVA)
)
)
{
// Remove the cactus
auto absPos = a_Chunk.RelativeToAbsolute(NewTop);
a_Chunk.GetWorld()->DropBlockAsPickups(absPos);
return i + 1;
}
} // for neighbor
} // for i - numToGrow
return numToGrow;
}
virtual PlantAction CanGrow(cChunk & a_Chunk, Vector3i a_RelPos) const override
{
// Only allow growing if there's an air block above:
const auto RelPosAbove = a_RelPos.addedY(1);
if (cChunkDef::IsValidHeight(RelPosAbove) && (a_Chunk.GetBlock(RelPosAbove) == E_BLOCK_AIR))
{
return Super::CanGrow(a_Chunk, a_RelPos);
}
return paStay;
}
} ;
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