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

// 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;
	}
} ;