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// BlockSlab.h
// Declares cBlockSlabHandler and cBlockDoubleSlabHandler classes
#pragma once
#include "BlockHandler.h"
#include "../Items/ItemHandler.h"
#include "Root.h"
#include "ChunkInterface.h"
class cBlockSlabHandler :
public cBlockHandler
{
public:
cBlockSlabHandler(BLOCKTYPE a_BlockType)
: cBlockHandler(a_BlockType)
{
}
virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
{
a_Pickups.push_back(cItem(m_BlockType, 1, a_BlockMeta & 0x7));
}
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
{
a_BlockType = m_BlockType;
NIBBLETYPE Meta = (NIBBLETYPE) a_Player->GetEquippedItem().m_ItemDamage;
// Set the correct metadata based on player equipped item (i.e. a_BlockMeta not initialised yet)
switch (a_BlockFace)
{
case BLOCK_FACE_TOP:
{
// Bottom half slab block
a_BlockMeta = Meta & 0x7;
break;
}
case BLOCK_FACE_BOTTOM:
{
// Top half slab block
a_BlockMeta = Meta | 0x8;
break;
}
case BLOCK_FACE_EAST:
case BLOCK_FACE_NORTH:
case BLOCK_FACE_SOUTH:
case BLOCK_FACE_WEST:
{
if (a_CursorY > 7)
{
// Cursor at top half of block, place top slab
a_BlockMeta = Meta | 0x8; break;
}
else
{
// Cursor at bottom half of block, place bottom slab
a_BlockMeta = Meta & 0x7; break;
}
}
case BLOCK_FACE_NONE: return false;
} // switch (a_BlockFace)
// Check if the block at the coordinates is a single slab. Eligibility for combining has already been processed in ClientHandle
// Changed to-be-placed to a double slab if we are clicking on a single slab, as opposed to placing one for the first time
if (IsAnySlabType(a_ChunkInterface.GetBlock(a_BlockX, a_BlockY, a_BlockZ)))
{
a_BlockType = GetDoubleSlabType(m_BlockType);
a_BlockMeta = a_BlockMeta & 0x7;
}
return true;
}
virtual bool CanDirtGrowGrass(NIBBLETYPE a_Meta) override
{
return ((a_Meta & 0x8) != 0);
}
/// Returns true if the specified blocktype is one of the slabs handled by this handler
static bool IsAnySlabType(BLOCKTYPE a_BlockType)
{
return ((a_BlockType == E_BLOCK_WOODEN_SLAB) || (a_BlockType == E_BLOCK_STONE_SLAB) || (a_BlockType == E_BLOCK_NEW_STONE_SLAB));
}
virtual void OnCancelRightClick(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace) override
{
if ((a_BlockFace == BLOCK_FACE_NONE) || (a_Player->GetEquippedItem().m_ItemType != (short)m_BlockType))
{
return;
}
// Sends the slab back to the client. It's to refuse a doubleslab placement.
a_Player->GetWorld()->SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, a_Player);
}
/// Converts the single-slab blocktype to its equivalent double-slab blocktype
static BLOCKTYPE GetDoubleSlabType(BLOCKTYPE a_SingleSlabBlockType)
{
switch (a_SingleSlabBlockType)
{
case E_BLOCK_STONE_SLAB: return E_BLOCK_DOUBLE_STONE_SLAB;
case E_BLOCK_WOODEN_SLAB: return E_BLOCK_DOUBLE_WOODEN_SLAB;
case E_BLOCK_NEW_STONE_SLAB: return E_BLOCK_DOUBLE_NEW_STONE_SLAB;
}
ASSERT(!"Unhandled slab type!");
return E_BLOCK_AIR;
}
virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) override
{
// Toggle the 4th bit - up / down:
return (a_Meta ^ 0x08);
}
} ;
class cBlockDoubleSlabHandler :
public cBlockHandler
{
public:
cBlockDoubleSlabHandler(BLOCKTYPE a_BlockType)
: cBlockHandler(a_BlockType)
{
}
virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
{
BLOCKTYPE Block = GetSingleSlabType(m_BlockType);
a_Pickups.push_back(cItem(Block, 2, a_BlockMeta & 0x7));
}
inline static BLOCKTYPE GetSingleSlabType(BLOCKTYPE a_BlockType)
{
switch (a_BlockType)
{
case E_BLOCK_DOUBLE_STONE_SLAB: return E_BLOCK_STONE_SLAB;
case E_BLOCK_DOUBLE_WOODEN_SLAB: return E_BLOCK_WOODEN_SLAB;
case E_BLOCK_DOUBLE_NEW_STONE_SLAB: return E_BLOCK_NEW_STONE_SLAB;
}
ASSERT(!"Unhandled double slab type!");
return a_BlockType;
}
} ;
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