Synchronizing client TileEntity to server?

[McJty]

Hi all,

 

How can I (with 1.7.10) synchronize changes to the client TileEntity to the server? I have a GUI where I want to modify some settings in my tileentity and I want it to be saved on the server side. I found some tutorials on the web but they are for older versions and I have trouble adapting them to latest forge.

 

Any help here?

 

Thanks

[McJty]

Don't modify the client TE from the GUI. Send a (custom) packet to the server to notify it that the user e.g. pressed a button and then let the server update the data.

 

Yes I gathered that. But how? I can't find example code on this (at least example code that still works in this version of forge)

[McJty]

Hmm sorry but I'm probably looking for something else or it is named differently that I'm expecting but I can't find any tutorial there that seems to match what I'm looking at?

[McJty]

Ah sorry thanks. Didn't think of looking into networking code. This is a new programming area for me. Have to get used to it.

[McJty]

Ok, thanks to your help I managed to get a bit further but I'm still stuck with a problem. The problem I have now is that when my GUI updates a value in the tile entity (does this by sending a message) the server version of the tile entity is updated correctly (and saved when I exit the game) but the client tile entity does not reflect this change (even though I call markBlockForUpdate). I have to save and load the world again before the client tile entity is updated.

 

Here is (in summary) what I have done:

 

I made a simple message channel and registered my message with:

 

        INSTANCE = NetworkRegistry.INSTANCE.newSimpleChannel("rftools");
        INSTANCE.registerMessage(PacketRFMonitor.class, PacketRFMonitor.class, nextID(), Side.SERVER);

 

PacketRFMonitor basically looks like this:

 

public class PacketRFMonitor implements IMessage, IMessageHandler<PacketRFMonitor, IMessage> {

    @Override
    public void fromBytes(ByteBuf buf) {
        ...
    }

    @Override
    public void toBytes(ByteBuf buf) {
        ...
    }

    @Override
    public IMessage onMessage(PacketRFMonitor message, MessageContext ctx) {
        EntityPlayer player = ctx.getServerHandler().playerEntity;
        TileEntity te = player.worldObj.getTileEntity(message.x, message.y, message.z);
        if(!(te instanceof RFMonitorBlockTileEntity)) {
            System.out.println("createPowerMonitotPacket: TileEntity is not a RFMonitorBlockTileEntity!");
            return null;
        }
        RFMonitorBlockTileEntity monitorBlockTileEntity = (RFMonitorBlockTileEntity) te;
        monitorBlockTileEntity.setMonitor(message.monitor);
        player.worldObj.markBlockForUpdate(x, y, z);
        return null;
    }
}

 

In my tile entity class I have the following:

 

public class RFMonitorBlockTileEntity extends TileEntity {
    private int monitorX = -1;
    private int monitorY = -1;  // Invalid y coordinate so we know it is not initialized yet
    private int monitorZ = -1;

    ... setters and getters ....

    @Override
    public Packet getDescriptionPacket() {
        NBTTagCompound nbtTag = new NBTTagCompound();
        this.writeToNBT(nbtTag);
        return new S35PacketUpdateTileEntity(this.xCoord, this.yCoord, this.zCoord, 1, nbtTag);
    }

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

    @Override
    public void readFromNBT(NBTTagCompound tagCompound) {
        super.readFromNBT(tagCompound);
        monitorX = tagCompound.getInteger("monitorX");
        monitorY = tagCompound.getInteger("monitorY");
        monitorZ = tagCompound.getInteger("monitorZ");
    }

    @Override
    public void writeToNBT(NBTTagCompound tagCompound) {
        super.writeToNBT(tagCompound);
        tagCompound.setInteger("monitorX", monitorX);
        tagCompound.setInteger("monitorY", monitorY);
        tagCompound.setInteger("monitorZ", monitorZ);
    }
}

 

Then in my GUI code I have this:

 

    private void sendChangeToServer(Coordinate c) {
        PacketHandler.INSTANCE.sendToServer(new PacketRFMonitor(monitorBlockTileEntity.xCoord, monitorBlockTileEntity.yCoord, monitorBlockTileEntity.zCoord, c));
    }

 

My full source code can be seen on github:

 

https://github.com/McJty/RFTools

 

As far as I know I have done everything correctly but apparently not. I can of course manually change the client tile entity in the gui code but I have been told not to do that and I prefer to do things the proper way.

 

Any ideas what could be wrong here?

 

Thanks!