@Override
  public void renderRedstoneInterfaceStuff(float partialTicks) {
    EntityPlayerSP player = Minecraft.getMinecraft().thePlayer;
    ItemStack itemStack = player.getCurrentEquippedItem();
    if (itemStack != null) {
      Item item = itemStack.getItem();

      if (item == ModItems.redstoneTool) {
        drawInterfaceLines(player, partialTicks);
        drawLinkingCube(itemStack, player, partialTicks);
      }
    }
  }