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Don't understand TileEntity synchronization


jh62

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I read this tutorial (http://cazzar.net/tutorials/minecraft/Tile-Entity-Updates-The-Quick-and-Dirty-Method/) and theres something I don't understand:

 

Where and how do I send my data just overriding this two methods in TileEntity?

 

@Override
public Packet getDescriptionPacket() {
    NBTTagCompound tag = new NBTTagCompound();
    writeToNBT(tag);
    return new S35PacketUpdateTileEntity(xCoord, yCoord, zCoord, 0, tag);
}

 

@Override
public void onDataPacket(NetworkManager net, S35PacketUpdateTileEntity pkt) {
    readFromNBT(pkt.func_148857_g());
}

 

I have a field called "InUse" that it should change whenever a player activates a block, but I don't understand how to send it through the block event.

 

I tried onBlockActivated() getting the description Packet and the NBTTag, write the value, but then I don't know how to send it.

 

What Im I Missing?

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Read further in the tutorial, it tells you how to sync your data. Specifically, the 'Now what?' section.

Don't PM me with questions. They will be ignored! Make a thread on the appropriate board for support.

 

1.12 -> 1.13 primer by williewillus.

 

1.7.10 and older versions of Minecraft are no longer supported due to it's age! Update to the latest version for support.

 

http://www.howoldisminecraft1710.today/

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Read further in the tutorial, it tells you how to sync your data. Specifically, the 'Now what?' section.

 

I read that part, but where in all that code i write the value of my custom field?

 

I only see two methods that are overriden in TileEntity and then the block is mark for update.

 

Should I do something like this?

 

@Override
public boolean onBlockActivated(World worldIn, BlockPos pos,
		IBlockState state, EntityPlayer playerIn, EnumFacing side,
		float hitX, float hitY, float hitZ) {

	if (worldIn.isRemote) {
		return true;
	}

	TileEntityTableSaw entity = (TileEntityTableSaw) worldIn
			.getTileEntity(pos);

	if (!entity.isInUse()) {
		entity.use(worldIn);

		S35PacketUpdateTileEntity packet = (S35PacketUpdateTileEntity) entity
				.getDescriptionPacket();
		NBTTagCompound tag = packet.getNbtCompound();
		tag.setBoolean("inUse", true);
		entity.onDataPacket(null, packet);
		worldIn.markBlockForUpdate(pos);
	} else {
		playerIn.addChatMessage(new ChatComponentText(
				"Can't use is it right now!"));
	}

	return true;
}

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No, in your TileEntity, you write the inUse value to NBT in the writeToNBT method. Then whenever you change the onUse variable in the TileEntity, you call

world.markBlockForUpdate(x,y,z)

. That's it.

Don't PM me with questions. They will be ignored! Make a thread on the appropriate board for support.

 

1.12 -> 1.13 primer by williewillus.

 

1.7.10 and older versions of Minecraft are no longer supported due to it's age! Update to the latest version for support.

 

http://www.howoldisminecraft1710.today/

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No, in your TileEntity, you write the inUse value to NBT in the writeToNBT method. Then whenever you change the onUse variable in the TileEntity, you call

world.markBlockForUpdate(x,y,z)

. That's it.

 

Thanks. That's what I thougth and I tried that also, so I must be missunderstanding something or doing something wrong.

 

The goal of the "InUse" boolean is to trigger an animation on the model. In the renderer i read the tileentity's inUse boolean and use it to rotate a cube. Here is some of the code:

 

BlockTableSaw.java:

@Override
public boolean onBlockActivated(World worldIn, BlockPos pos,
		IBlockState state, EntityPlayer playerIn, EnumFacing side,
		float hitX, float hitY, float hitZ) {

	if (worldIn.isRemote) {
		return true;
	}

	ItemStack stack = playerIn.getHeldItem();

	if (stack == null) {
		return true;
	}

	Item item = stack.getItem();
	Block block = Block.getBlockFromItem(item);

	ItemStack drop = null;

	if (block != null) {
		if (block.getMaterial() == Material.wood) {
			drop = new ItemStack(Blocks.log, stack.stackSize);
		}
	} else {
		drop = new ItemStack(Items.stick, stack.stackSize * 2);
	}

	TileEntityTableSaw entity = (TileEntityTableSaw) worldIn
			.getTileEntity(pos);

	if (!entity.isInUse()) {
		playerIn.destroyCurrentEquippedItem();
		entity.use(worldIn, playerIn, drop);
	} else {
		playerIn.addChatMessage(new ChatComponentText("That is beign used!"));
	}

	return true;
}

 

TileEntityTableSaw.java:

package com.pablismod.tileentity;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Timer;

import net.minecraft.entity.Entity;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.NetworkManager;
import net.minecraft.network.Packet;
import net.minecraft.network.play.server.S35PacketUpdateTileEntity;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.BlockPos;
import net.minecraft.world.World;

public class TileEntityTableSaw extends TileEntity {

private Timer t;
private boolean inUse = false;

@Override
public void readFromNBT(NBTTagCompound compound) {
	super.readFromNBT(compound);
	inUse = compound.getBoolean("inUse");
}

@Override
public void writeToNBT(NBTTagCompound compound) {
	super.writeToNBT(compound);
	compound.setBoolean("inUse", isInUse());
}

public boolean isInUse() {
	return t != null && t.isRunning();
}

public void use(World worldIn, EntityPlayer player, ItemStack stack) {

	if (t != null && t.isRunning()) {
		return;
	}

	inUse = true;
	worldIn.markBlockForUpdate(pos);

	final World world = worldIn;
	final EntityPlayer p = player;
	final ItemStack s = stack;

	t = new Timer(3000, new ActionListener() {

		@Override
		public void actionPerformed(ActionEvent evt) {

			BlockPos pos = TileEntityTableSaw.this.getPos();
			Entity e = new EntityItem(world, pos.getX(), pos.getY() + 1.2f,
					pos.getZ(), s);
			world.spawnEntityInWorld(e);

			inUse = false;
			world.markBlockForUpdate(TileEntityTableSaw.this.getPos());
		}
	});

	t.setRepeats(false);
	t.start();
}

@Override
public Packet getDescriptionPacket() {
	NBTTagCompound tag = new NBTTagCompound();
	this.writeToNBT(tag);
	return new S35PacketUpdateTileEntity(this.getPos(), 0, tag);
}

@Override
public void onDataPacket(NetworkManager net,
		S35PacketUpdateTileEntity packet) {
	readFromNBT(packet.getNbtCompound());
}
}

 

Don't mind Im using the javax.swing.Timer. The code is temporary and it works, because if I try to use the table when is in use, it wont let me... just the animation wont play.

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