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cuberite-2a/source/Blocks/BlockHopper.h

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// BlockHopper.h
// Declares the cBlockHopperHandler class representing the handler for the Hopper block
class cBlockHopperHandler :
public cBlockEntityHandler
{
public:
cBlockHopperHandler(BLOCKTYPE a_BlockType)
: cBlockEntityHandler(a_BlockType)
{
}
virtual bool GetPlacementBlockTypeMeta(
cWorld * a_World, cPlayer * a_Player,
int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
int a_CursorX, int a_CursorY, int a_CursorZ,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
) override
{
a_BlockType = m_BlockType;
// Convert the blockface into meta:
switch (a_BlockFace)
{
case BLOCK_FACE_BOTTOM: a_BlockMeta = E_META_HOPPER_FACING_YM; break;
case BLOCK_FACE_TOP: a_BlockMeta = E_META_HOPPER_FACING_YM; break;
case BLOCK_FACE_EAST: a_BlockMeta = E_META_HOPPER_FACING_XM; break;
case BLOCK_FACE_NORTH: a_BlockMeta = E_META_HOPPER_FACING_ZP; break;
case BLOCK_FACE_SOUTH: a_BlockMeta = E_META_HOPPER_FACING_ZM; break;
case BLOCK_FACE_WEST: a_BlockMeta = E_META_HOPPER_FACING_XP; break;
default: a_BlockMeta = E_META_HOPPER_UNATTACHED; break;
}
return true;
}
} ;