public class CapabilityListener{
    private static final ResourceLocation RLToolTrack = new ResourceLocation(RoW.modID, "capToolTrack");

    @SubscribeEvent
    public void on(AttachCapabilitiesEvent<Entity> event){
        if(event.getObject() instanceof EntityPlayer)
            event.addCapability(RLToolTrack, new ToolTrackProvider());
    }

    @SubscribeEvent
    public void on(PlayerInteractEvent.RightClickBlock event){
        if(event.getHand() == EnumHand.OFF_HAND || event.getItemStack() == null || !(event.getItemStack().getItem() instanceof ItemTrackTool))
            return;
        EntityPlayer player = event.getEntityPlayer();
        World world = player.world;
        ItemStack stack = player.getHeldItemMainhand();
        if(player != null && player.hasCapability(ToolTrackProvider.CAP_TOOL_TRACK, null)){
            event.setCanceled(true);
            CapabilityToolTrack.IToolTrackCapability cap = player.getCapability(ToolTrackProvider.CAP_TOOL_TRACK, null);
            int raise = cap.scalarB();
            if(!cap.doneFirst()){
                //if(!world.isRemote){
                    cap.setDone(true);
                    if(world.getBlockState(event.getPos()).getBlock().isReplaceable(world, event.getPos()))
                        cap.setPos(event.getPos());
                    else
                        cap.setPos(event.getPos().up());
                //}
            }else{
                BlockPos p1 = cap.getOrigin();
                BlockPos p2 = event.getPos();
                if(!world.getBlockState(p2).getBlock().isReplaceable(world, p2)) p2 = p2.up();
                if(p2.getY() != p1.getY()) return;
                /* ----- block placement code (!isRemote check for placement in other classes) ----- */
                //if(!world.isRemote){
                    cap.setDone(false);
                    cap.setScalarB(0);
                    cap.setInverse(false);
                //}
            }
        }
    }

    @SideOnly(Side.CLIENT)
    @SubscribeEvent
    public void on(RenderWorldLastEvent event){
        if(FMLClientHandler.instance().getClient().gameSettings.thirdPersonView == 0)
            render(FMLClientHandler.instance().getClientPlayerEntity(), event.getPartialTicks());
    }

    @SideOnly(Side.CLIENT)
    @SubscribeEvent
    public void on(RenderPlayerEvent.Pre event){
        render(event.getEntityPlayer(), event.getPartialRenderTick());
    }

    @SideOnly(Side.CLIENT)
    private static void render(EntityPlayer player, float tick){
        World world = player.world;
        Minecraft m = Minecraft.getMinecraft();
        ItemStack stack = player.getHeldItemMainhand();
        if(m.player != player) return;
        if(player.getRidingEntity() == null
                && stack != null
                && stack.getItem() instanceof ItemTrackTool
                && player.hasCapability(ToolTrackProvider.CAP_TOOL_TRACK, null)){
            CapabilityToolTrack.IToolTrackCapability cap = player.getCapability(ToolTrackProvider.CAP_TOOL_TRACK, null);
            if(!cap.doneFirst()) return;
            BlockPos p1 = cap.getOrigin();
            int raise = cap.scalarB();
            if(m.objectMouseOver != null && m.objectMouseOver.typeOfHit == RayTraceResult.Type.BLOCK && m.objectMouseOver.getBlockPos() != null){
                BlockPos p2 = m.objectMouseOver.getBlockPos();
                /* ----- render code ----- */
            }
        }
    }
}