[Solved] Why is this value desyncronized? [1.6.4]

[larsgerrits]

Hello, i got another problem for you now. I have a value that's getting updated on the client side, but not on the server side. The way i update the code is via a GUI, when a click a button it's incrementing or decrementing a value and setting it to a TileEntity. In my container class i have some debug code:

System.out.println((tileentity.worldObj.isRemote ? "Client" : "Server") + " : " + tileentity.getPage());

That prints this in the console:

2014-02-24 17:00:47 [iNFO] [sTDOUT] Server : 0
2014-02-24 17:00:47 [iNFO] [sTDOUT] Client : 0

And if i increment the value using a button, this is getting printed in the console:

2014-02-24 17:07:41 [iNFO] [sTDOUT] Server : 0
2014-02-24 17:07:42 [iNFO] [sTDOUT] Client :1

As you see the value is getting updated client-side, but not on the server side. I added this code to my TileEntity class:

public Packet getDescriptionPacket()
{
	NBTTagCompound tag = new NBTTagCompound();
	this.writeToNBT(tag);
	return new Packet132TileEntityData(this.xCoord, this.yCoord, this.zCoord, 1, tag);
}

public void onDataPacket(INetworkManager networkManager, Packet132TileEntityData packet)
{
	this.readFromNBT(packet.data);
}

But that doesn't seem to work. I have registered my TileEntity class. Does anyone know how to correctly syncronize that value?

 

Code:

[spoiler=TileEntityCustomizableBlock]

package larsg310.mods.customization.tileentity;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.ISidedInventory;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.INetworkManager;
import net.minecraft.network.packet.Packet;
import net.minecraft.network.packet.Packet132TileEntityData;
import net.minecraft.tileentity.TileEntity;

public class TileEntityCustomizableBlock extends TileEntity implements ISidedInventory
{
private ItemStack[] inventory = new ItemStack[2];

private float minX = 0;
private float maxX = 1;

private int page = 0;

public float getMinX()
{
	return minX;
}

public void setMinX(float minX)
{
	this.minX = minX;
}

public float getMaxX()
{
	return maxX;
}

public void setMaxX(float maxX)
{
	this.maxX = maxX;
}

public int getPage()
{
	return page;
}

public void setPage(int page)
{
	this.page = page;
}

public Packet getDescriptionPacket()
{
	NBTTagCompound tag = new NBTTagCompound();
	this.writeToNBT(tag);
	return new Packet132TileEntityData(this.xCoord, this.yCoord, this.zCoord, 1, tag);
}

public void onDataPacket(INetworkManager networkManager, Packet132TileEntityData packet)
{
	this.readFromNBT(packet.data);
}

public void writeToNBT(NBTTagCompound tag)
{
	super.writeToNBT(tag);
	tag.setInteger("Page", page);
	tag.setFloat("minX", minX);
	tag.setFloat("maxX", maxX);
}

public void readFromNBT(NBTTagCompound tag)
{
	page = tag.getInteger("Page");
	minX = tag.getFloat("minX");
	maxX = tag.getFloat("maxX");
}

public int getSizeInventory()
{
	return inventory.length;
}

public ItemStack getStackInSlot(int slot)
{
	return inventory[slot];
}

public ItemStack decrStackSize(int slot, int amount)
{
	if (this.inventory[slot] != null)
	{
		ItemStack itemstack;

		if (this.inventory[slot].stackSize <= amount)
		{
			itemstack = this.inventory[slot];
			this.inventory[slot] = null;
			return itemstack;
		}
		else
		{
			itemstack = this.inventory[slot].splitStack(amount);

			if (this.inventory[slot].stackSize == 0)
			{
				this.inventory[slot] = null;
			}

			return itemstack;
		}
	}
	else
	{
		return null;
	}
}

public ItemStack getStackInSlotOnClosing(int slot)
{
	if (this.inventory[slot] != null)
	{
		ItemStack itemstack = this.inventory[slot];
		this.inventory[slot] = null;
		return itemstack;
	}
	else
	{
		return null;
	}
}

public void setInventorySlotContents(int slot, ItemStack itemstack)
{
	this.inventory[slot] = itemstack;

	if (itemstack != null && itemstack.stackSize > this.getInventoryStackLimit())
	{
		itemstack.stackSize = this.getInventoryStackLimit();
	}
}

public String getInvName()
{
	return "container.customizableBlock";
}

public boolean isInvNameLocalized()
{
	return false;
}

public int getInventoryStackLimit()
{
	return 1;
}

public boolean isUseableByPlayer(EntityPlayer entityplayer)
{
	return this.worldObj.getBlockTileEntity(this.xCoord, this.yCoord, this.zCoord) != this ? false : entityplayer.getDistanceSq((double) this.xCoord + 0.5D, (double) this.yCoord + 0.5D, (double) this.zCoord + 0.5D) <= 64.0D;
}

public void openChest()
{

}

public void closeChest()
{

}

public boolean isItemValidForSlot(int slot, ItemStack itemstack)
{
	return true;
}

public int[] getAccessibleSlotsFromSide(int var1)
{
	return null;
}

public boolean canInsertItem(int i, ItemStack itemstack, int j)
{
	return false;
}

public boolean canExtractItem(int i, ItemStack itemstack, int j)
{
	return false;
}
}

 

[spoiler=ContainerCustomizableBlock]

package larsg310.mods.customization.inventory;

import larsg310.mods.customization.tileentity.TileEntityCustomizableBlock;
import net.minecraft.client.Minecraft;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

public class ContainerCustomizableBlock extends Container
{
private TileEntityCustomizableBlock tileentity;
private InventoryPlayer inventory;

private Slot[] slots;

public ContainerCustomizableBlock(InventoryPlayer inventory, TileEntityCustomizableBlock tileentity)
{
	this.tileentity = tileentity;
	this.inventory = inventory;

	for (int i = 0; i < 3; ++i)
	{
		for (int j = 0; j < 9; ++j)
		{
			this.addSlotToContainer(new Slot(inventory, j + i * 9 + 9, 8 + j * 18, 84 + i * 18 + 80));
		}
	}

	for (int i = 0; i < 9; ++i)
	{
		this.addSlotToContainer(new Slot(inventory, i, 8 + i * 18, 142 + 80));
	}
	slots = new Slot[]{new Slot(tileentity, 0, Integer.MIN_VALUE, 20), new Slot(tileentity, 1, Integer.MIN_VALUE, 20)};
	this.addSlotToContainer(slots[0]);
	this.addSlotToContainer(slots[1]);
	System.out.println((tileentity.worldObj.isRemote ? "Client" : "Server") + " : " + tileentity.getPage());
	this.drawSlotsBasedOnPage();
}

public boolean canInteractWith(EntityPlayer entityplayer)
{
	return this.tileentity.isUseableByPlayer(entityplayer);
}

public void detectAndSendChanges()
{
	super.detectAndSendChanges();
	drawSlotsBasedOnPage();
}

private void drawSlotsBasedOnPage()
{
	for(Slot slot : slots)
	{
		slot.xDisplayPosition = Integer.MIN_VALUE;
	}
	switch (tileentity.getPage())
	{
		case 0:
			slots[0].xDisplayPosition = 100;
			break;
		case 1:
			slots[1].xDisplayPosition = 118;
			break;
	}
}
public ItemStack transferStackInSlot(EntityPlayer player, int slot)
{
	return null;
}
}

 

[spoiler=GuiCustomizableBlock]

package larsg310.mods.customization.gui;

import larsg310.mods.customization.inventory.ContainerCustomizableBlock;
import larsg310.mods.customization.lib.Reference;
import larsg310.mods.customization.tileentity.TileEntityCustomizableBlock;
import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.StatCollector;

public class GuiCustomizableBlock extends GuiContainer
{
private int page;
private int maxPages = 1;

private TileEntityCustomizableBlock tileentity;
ResourceLocation texture = new ResourceLocation(Reference.MOD_ID, "textures/gui/customizableBlock.png");

public GuiCustomizableBlock(InventoryPlayer inventory, TileEntityCustomizableBlock tileentity)
{
	super(new ContainerCustomizableBlock(inventory, tileentity));
	this.tileentity = tileentity;
	this.page = tileentity.getPage();
	this.ySize = 246;
}

@Override
protected void drawGuiContainerForegroundLayer(int x, int y)
{
	fontRenderer.drawString(StatCollector.translateToLocal("container.customizableBlock"), 8, 6, 4210752);

	String pageString = "Page: " + page + " / " + maxPages;
	fontRenderer.drawString(pageString, xSize / 2 - ((pageString.length() / 2) * 6), 123, 4210752);
}

@Override
protected void drawGuiContainerBackgroundLayer(float f, int x, int y)
{
	this.mc.getTextureManager().bindTexture(texture);
	int x1 = (width - xSize) / 2;
	int y1 = (height - ySize) / 2;
	this.drawTexturedModalRect(x1, y1, 0, 0, xSize, ySize);
}

@SuppressWarnings("unchecked")
public void initGui()
{
	super.initGui();

	this.buttonList.clear();
	this.buttonList.add(new GuiButton(0, (width - xSize) / 2 + 7, 113, 12, 20, "<"));
	this.buttonList.add(new GuiButton(1, (width - xSize) / 2 + (xSize - 19), 113, 12, 20, ">"));
}

public void actionPerformed(GuiButton button)
{
	switch (button.id)
	{
		case 0:
			page--;
			break;
		case 1:
			page++;
			break;

	}
	if (page < 0)
	{
		page = 0;
	}
	if (page > maxPages)
	{
		page = maxPages;
	}
	this.tileentity.setPage(page);
}
}

 

[spoiler=BlockCustomizableBlock]

package larsg310.mods.customization.block;

import larsg310.mods.customization.CustomizationCraft;
import larsg310.mods.customization.lib.GuiIds;
import larsg310.mods.customization.lib.Names;
import larsg310.mods.customization.tileentity.TileEntityCustomizableBlock;
import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.world.IBlockAccess;
import net.minecraft.world.World;

public class BlockCustomizableBlock extends Block
{
public BlockCustomizableBlock(int id)
{
	super(id, Material.iron);
	this.setCreativeTab(CreativeTabs.tabBlock);
	this.setUnlocalizedName(Names.CUSTOMIZABLE_BLOCK);
}

public TileEntity createTileEntity(World world, int meta)
{
	return new TileEntityCustomizableBlock();
}

public boolean hasTileEntity(int meta)
{
	return true;
}

public boolean onBlockActivated(World world, int x, int y, int z, EntityPlayer player, int side, float hitX, float hitY, float hitZ)
{
	if(!world.isRemote)
	{
		player.openGui(CustomizationCraft.instance, GuiIds.CUSTOMIZABLE_BLOCK, world, x, y, z);
	}
	return true;
}

public void setBlockBoundsBasedOnState(IBlockAccess world, int x, int y, int z)
{
	TileEntity te = world.getBlockTileEntity(x, y, z);
	if (te instanceof TileEntityCustomizableBlock)
	{
		TileEntityCustomizableBlock tileentity = (TileEntityCustomizableBlock) te;

		this.setBlockBounds(tileentity.getMinX(), 0, 0, tileentity.getMaxX(), 1, 1);
	}
}
public boolean isOpaqueCube()
{
	return false;
}
}

 

[spoiler=GuiHandler]

package larsg310.mods.customization.handler;

import larsg310.mods.customization.CustomizationCraft;
import larsg310.mods.customization.gui.GuiCustomizableBlock;
import larsg310.mods.customization.inventory.ContainerCustomizableBlock;
import larsg310.mods.customization.lib.GuiIds;
import larsg310.mods.customization.tileentity.TileEntityCustomizableBlock;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import cpw.mods.fml.common.network.IGuiHandler;
import cpw.mods.fml.common.network.NetworkRegistry;

public class GuiHandler implements IGuiHandler
{
@Override
public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z)
{
	switch(ID)
	{
		case GuiIds.CUSTOMIZABLE_BLOCK:
			return new ContainerCustomizableBlock(player.inventory, (TileEntityCustomizableBlock)world.getBlockTileEntity(x, y, z));
	}
	return null;
}
@Override
public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z)
{
	switch(ID)
	{
		case GuiIds.CUSTOMIZABLE_BLOCK:
			return new GuiCustomizableBlock(player.inventory, (TileEntityCustomizableBlock)world.getBlockTileEntity(x, y, z));
	}
	return null;
}
public static void register()
{
	NetworkRegistry.instance().registerGuiHandler(CustomizationCraft.instance, new GuiHandler());
}
}

 

 

If you need more code, i'll be happy to provide more.

[coolAlias]

getDescriptionPacket is for updating the client tile entity with the data from the server, not the other way around (pretty sure about this - anyone correct me if I'm wrong).

 

You're going to have to send a packet from your Gui when you click a button telling the server which button was clicked (or whatever data you want to send) and let the server process that information.

[larsgerrits]

So i have to use packets? Damnit, guess it's time to learn how to deal with packets...

[larsgerrits]

Ok, i tried using packets, but i can't find find a way to update the tileentity value... Can anyone give a good tutorial, or some code (possibly some pseudocode)?

[Draco18s]

So i have to use packets? Damnit, guess it's time to learn how to deal with packets...

 

Packets are not that hard.

[coolAlias]

You can pretty much literally just copy/paste the code from this tutorial (read the tutorial of course, so you know what's going on and where to register your packets and such). Then all you do is create your packet class and fill out the methods. Done. It's really simple once you get familiar with it.

 

EDIT: Sorry, that tutorial is for 1.7.2 - didn't realize you were coding for 1.6.4 at the time.

[larsgerrits]

Pseudocode:

 

void onButtonPressed() {
    sendPacketToServer(new UpdateTePacket(tileEntity.x, tileEntity.y, tileEntity.z, moreData));
}

void handlePacket(UpdateTePacket packet, World world) {
    if (world.getblock(packet.x, packet.y, packet.z) == MyBlock) {
        MyTileEntity te = world.getBlockTileEntity(packet.x,packet.y,packet.z);
        te.setSomeValue(packet.moreData);
    }
}

At the handlePacket method, how can you make that method? (I'm not good with packets yet, this is the first time i used them)

[Glenn]

Whoa, whoa, whoa. This can be solved in a much simpler way.

 

If you're just incrementing or decrementing a value, it would be very simple to use Block Events to solve the problem. Block events basically send information consisting of two integers to a specific tile. When a block event is sent, it is received both on client and server side, so you will have to take care of that.

 

To send a block event, simply do

world.addBlockEvent(x, y, z, BlockID, eventIndex, param);

To catch a block event, add this method to the block class belonging to your tile entity:

public boolean onBlockEventReceived(World world, int x, int y, int z, int eventIndex, param)

 

They key to solving your problem is to use world.addBlockEvent each time the value is changed, and send the value along with it. You should add a switch for event indices in onBlockEventReceived, and give this specific event eventIndex 0. If eventIndex == 0, set value in tile entity to param.

[Moritz]

is even easier as expected

 

use the on update function like this:

@Override
public void onUpdate()
{
    if(!worldObj.isRemote)
    {
         if(worldObj.getWorldTime() % 10 == 0)
         {
                PacketDispatcher.sendPacketToAllPlayers(getDiscriptionPacket());
         }
    }
}

 

that should work pretty fine!

[sequituri]

@Moritz,

 

That is server-side code. The OP needs the client-side code.

[larsgerrits]

Thanks to all of you! I used the way that diesieben07 linked and it worked!