/* Logic backend */
    @Override
    public TileEntity createNewTileEntity (World world, int metadata)
    {
        return new gemFurnaceLogic();
    }

    public Integer getGui (World world, int x, int y, int z, EntityPlayer entityplayer)
    {
        return NGuiHandler.furnaceGui;
    }

    public Object getModInstance ()
    {
        return Main.instance;
    }

    @Override
    public boolean onBlockActivated (World world, int x, int y, int z, EntityPlayer player, int side, float clickX, float clickY, float clickZ)
    {
        if (player.isSneaking())
            return false;

        Integer integer = getGui(world, x, y, z, player);
        if (integer == null || integer == -1)
        {
            return false;
        }
        else
        {
            if (!world.isRemote)
                player.openGui(getModInstance(), integer, world, x, y, z);
            return true;
        }
    }