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#pragma once
#include "BlockHandler.h"
#include "../Chunk.h"
#include "MetaRotator.h"
class cBlockTorchHandler :
public cMetaRotator<cBlockHandler, 0x7, 0x4, 0x1, 0x3, 0x2>
{
public:
cBlockTorchHandler(BLOCKTYPE a_BlockType)
: cMetaRotator<cBlockHandler, 0x7, 0x4, 0x1, 0x3, 0x2>(a_BlockType)
{
}
virtual bool GetPlacementBlockTypeMeta(
cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
int a_CursorX, int a_CursorY, int a_CursorZ,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
) override
{
BLOCKTYPE Block;
NIBBLETYPE Meta;
AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, true); // Set to clicked block
a_ChunkInterface.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, Block, Meta);
if (!CanBePlacedOn(Block, Meta, a_BlockFace)) // Try to preserve original direction
{
// Torch couldn't be placed on whatever face was clicked, last ditch resort - find another face
AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, false); // Reset to torch block
a_BlockFace = FindSuitableFace(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ); // Set a_BlockFace to a valid direction which will be converted later to a metadata
if (a_BlockFace == BLOCK_FACE_NONE)
{
return false;
}
}
a_BlockType = m_BlockType;
a_BlockMeta = DirectionToMetaData(a_BlockFace);
return true;
}
inline static NIBBLETYPE DirectionToMetaData(eBlockFace a_Direction)
{
switch (a_Direction)
{
case BLOCK_FACE_BOTTOM: ASSERT(!"Shouldn't be getting this face"); return 0;
case BLOCK_FACE_TOP: return E_META_TORCH_FLOOR;
case BLOCK_FACE_EAST: return E_META_TORCH_EAST;
case BLOCK_FACE_WEST: return E_META_TORCH_WEST;
case BLOCK_FACE_NORTH: return E_META_TORCH_NORTH;
case BLOCK_FACE_SOUTH: return E_META_TORCH_SOUTH;
default:
{
ASSERT(!"Unhandled torch direction!");
break;
}
};
return 0x0;
}
inline static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
{
switch (a_MetaData)
{
case 0: return BLOCK_FACE_TOP; // By default, the torches stand on the ground
case E_META_TORCH_FLOOR: return BLOCK_FACE_TOP;
case E_META_TORCH_EAST: return BLOCK_FACE_EAST;
case E_META_TORCH_WEST: return BLOCK_FACE_WEST;
case E_META_TORCH_NORTH: return BLOCK_FACE_NORTH;
case E_META_TORCH_SOUTH: return BLOCK_FACE_SOUTH;
default:
{
ASSERT(!"Unhandled torch metadata");
break;
}
}
return BLOCK_FACE_TOP;
}
static bool CanBePlacedOn(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, eBlockFace a_BlockFace)
{
switch (a_BlockType)
{
case E_BLOCK_END_PORTAL_FRAME:
case E_BLOCK_SOULSAND:
{
// Exceptional vanilla behaviour
return true;
}
case E_BLOCK_GLASS:
case E_BLOCK_STAINED_GLASS:
case E_BLOCK_FENCE:
case E_BLOCK_NETHER_BRICK_FENCE:
case E_BLOCK_COBBLESTONE_WALL:
{
// Torches can only be placed on top of these blocks
return (a_BlockFace == BLOCK_FACE_YP);
}
case E_BLOCK_STONE_SLAB:
case E_BLOCK_WOODEN_SLAB:
{
// Toches can be placed on the top of these slabs only if the occupy the top half of the voxel
return ((a_BlockFace == BLOCK_FACE_YP) && ((a_BlockMeta & 0x08) == 0x08));
}
default:
{
if (cBlockInfo::FullyOccupiesVoxel(a_BlockType))
{
// Torches can be placed on full blocks unless their bottom side is clicked
return (a_BlockFace != BLOCK_FACE_YM);
}
return false;
}
}
}
/// Finds a suitable face to place the torch, returning BLOCK_FACE_NONE on failure
static eBlockFace FindSuitableFace(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
{
for (int i = BLOCK_FACE_YM; i <= BLOCK_FACE_XP; i++) // Loop through all directions
{
eBlockFace Face = static_cast<eBlockFace>(i);
AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, Face, true);
BLOCKTYPE BlockInQuestion;
NIBBLETYPE BlockInQuestionMeta;
a_ChunkInterface.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, BlockInQuestion, BlockInQuestionMeta);
if (CanBePlacedOn(BlockInQuestion, BlockInQuestionMeta, Face))
{
return Face;
}
else
{
// Reset coords in preparation for next iteration
AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, Face, false);
}
}
return BLOCK_FACE_NONE;
}
virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
{
eBlockFace Face = MetaDataToDirection(a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ));
AddFaceDirection(a_RelX, a_RelY, a_RelZ, Face, true);
BLOCKTYPE BlockInQuestion;
NIBBLETYPE BlockInQuestionMeta;
if (!a_Chunk.UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockInQuestion, BlockInQuestionMeta))
{
return false;
}
return CanBePlacedOn(BlockInQuestion, BlockInQuestionMeta, Face);
}
virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
{
// Always drop meta = 0
a_Pickups.push_back(cItem(m_BlockType, 1, 0));
}
} ;
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