Using IGuiHandler

[tarun1998]

Okay having some problems with the gui for a block.

 

 

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Mod File on server.


public Object getGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z)
{
if(ID == 90)
{
return new ContainerWaterCollector(player.inventory, new TileEntityWaterCollector());
}
if(ID == 91)
{
return new ContainerJM(player.inventory, new TileEntityJM());
}
return null;
}

 

Mod File on Client:


public Object getGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z)
{
if(ID == 90)
{
return new GuiWaterCollector(player.inventory, new TileEntityWaterCollector());
}
if(ID == 91)
{
return new GuiJM(player.inventory, new TileEntityJM());
}
return null;
}

 

ContainerJM Server:


public boolean canInteractWith(EntityPlayer par1EntityPlayer)
    {
        return jm.isUseableByPlayer(par1EntityPlayer);
    }

 

TileEntityJM Server:

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;
    }

 

BlockJM Server:


public boolean blockActivated(World world, int i, int j, int k, EntityPlayer entityplayer)
    {
        if (world.isRemote)
        {
            return true;
        }
        else
        {
            entityplayer.openGui(mod_ThirstMod.mod, 91, world, i, j, k);
            return true;
        }
    }

 

However when I run it, game crashes with the following error:

[WARNING] Failed to handle packet: java.lang.NullPointerException
java.lang.NullPointerException
at net.minecraft.src.ThirstMod.containers.TileEntityJM.isUseableByPlayer(TileEntityJM.java:268)
at net.minecraft.src.ThirstMod.containers.ContainerJM.canInteractWith(ContainerJM.java:86)
at net.minecraft.src.EntityPlayer.onUpdate(EntityPlayer.java:239)
at net.minecraft.src.EntityPlayerMP.localOnUpdateEntity(EntityPlayerMP.java:1066)
at net.minecraft.src.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:1060)
at net.minecraft.src.NetServerHandler.handleFlying(NetServerHandler.java:241)
at net.minecraft.src.Packet10Flying.processPacket(Packet10Flying.java:41)
at net.minecraft.src.NetworkManager.processReadPackets(NetworkManager.java:353)
at net.minecraft.src.NetServerHandler.handlePackets(NetServerHandler.java:73)
at net.minecraft.src.NetworkListenThread.handleNetworkListenThread(NetworkListenThread.java:113)
at net.minecraft.server.MinecraftServer.doTick(MinecraftServer.java:566)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)
at net.minecraft.src.ThreadServerApplication.run(ThreadServerApplication.java:18)

 

 

 

If you need more code PM me.

This is also happening with the Water Collector

[LexManos]

What is null in your function?

[tarun1998]

If you mean a method, then I have not used any nulls and have determined the variable 'mod'. Otherwise I have clue what you mean.

[LexManos]

Seems fairly straight forward, something in your code is null at the time you try to access it.

Learn to debug your own code please, we are not a IDE.

[tarun1998]

Thanks mate, all working now. Turns out worldObj was null for some reason. But I do believe this may be a bug, when you put something into the TileEntity (similar to Furnace) it does not send the information back so that in this case the drink is never made. This is the exact same code as the MLMP version except with the Forge GUI, packets etc. So I have no clue why this is not working. Do you have to register TileEntities with some sort of Forge register method or use the MinecraftForge.registerEntity method.

[LexManos]

You have to open the gui in whatever form that allows you to put items in.

And you need to do whatever you need to do to make sure the client sends the click events to the server.

Just like you've always had to, for any gui.

[tarun1998]

How would you send back the so called "clicks" to the server. I'm not sure why or how because it was all working on MLMP and so far not impressed with the difficulty to port to or use FML. Anyways how would I send the "clicks" back. Packets possibly.

[LexManos]

As long as you are doing things properly, as Minecraft does them, None of this should be an issue.

If you're having issues when converting, its MLMP, or your fault. Not ours.

Go look into how clicks are sent to the server for normal MC stuff, figure out why its not working for your GUI.

[tarun1998]

No everything is working on MLMP version. You probably (or CPW) did not add a functionality that MLMP does for you already relating to Tile Entities. I'll have a good look at MLMP files to fix this problem BTW is everything in the code on the first post for the GUI alright?

 

Some methods in ModLoaderMp.class Server:

getTileEntityPacket

sendTileEntityPacket

 

I'll have a look at it myself.

 

Or maybe i'll just send some itemstack packets with things inside the container... Hm...

[LexManos]

We specifically don't add those 1 line helper functions because they are stupid.

If you use them, move to the proper way of doing things.

But ya the bulk of the stuff in your first post looks fine.

[tarun1998]

Wait can you send ItemStack packets currently i'm sending integers and then changing the jmItemStacks when the packet is received on the server side. It is kinda working.

[jx759000]

  On 5/31/2012 at 8:56 AM, tarun1998 said:

Thanks mate, all working now. Turns out worldObj was null for some reason. But I do believe this may be a bug, when you put something into the TileEntity (similar to Furnace) it does not send the information back so that in this case the drink is never made. This is the exact same code as the MLMP version except with the Forge GUI, packets etc. So I have no clue why this is not working. Do you have to register TileEntities with some sort of Forge register method or use the MinecraftForge.registerEntity method.

 

Why was WorldObj Null?

I'm having the exact same problem.