[1.9] TileEntity - Assigne new NBTCompound

Darki · August 26, 2016

Hi,

I am making a machine. With a GUI Container, the Container is working and also the TileEntity but now I see that when you place the machine twice the machines have the same TileEntity, so that in both machine are the same Inventories and Items.

Here my Codes:

TileEntity:

public class TileEntityChemicalMixer extends TileEntity{

public InventoryBasic INVENTORY;
private static int ID = 0;

public TileEntityChemicalMixer(){
	INVENTORY = new InventoryBasic("Chemical Mixer", false, 3);
}

@Override
public void writeToNBT(NBTTagCompound compound) {
	super.writeToNBT(compound);

	NBTTagList list = new NBTTagList();

	for(int i = 0; i < INVENTORY.getSizeInventory(); i++){
		if(INVENTORY.getStackInSlot(i) != null){
			NBTTagCompound tag = new NBTTagCompound();
			tag.setByte("Slot", (byte) i);
			INVENTORY.getStackInSlot(i).writeToNBT(tag);
			list.appendTag(tag);
		}
	}

	compound.setTag("ItemStacks-" + ID, list);
}

@Override
public void readFromNBT(NBTTagCompound compound) {
	super.readFromNBT(compound);
	NBTTagList list = compound.getTagList("ItemStacks-" + ID, 10);
	this.INVENTORY = new InventoryBasic("Chemical Mixer", false, 3);
	for(int i = 0; i < list.tagCount(); i++){
		NBTTagCompound tag = list.getCompoundTagAt(i);
		byte b = tag.getByte("Slot");
		if(b >= 0 && b < INVENTORY.getSizeInventory()){
			INVENTORY.setInventorySlotContents(b, ItemStack.loadItemStackFromNBT(tag));
		}
	}
}

}

Container:

public class ContainerChemicalMixer extends Container{

private TileEntityChemicalMixer tileentiy;

public ContainerChemicalMixer(IInventory inv, TileEntityChemicalMixer tileentity) {
	this.tileentiy = tileentity;
	this.addSlotToContainer(new Slot(inv, 36, 30, 17));
	this.addSlotToContainer(new Slot(inv, 37, 130, 17));
	this.addSlotToContainer(new OutputSlot(inv, 38, 80, 51));

    // Player Inventory, Slot 9-35, Slot IDs 9-35
    for (int y = 0; y < 3; ++y) {
        for (int x = 0; x < 9; ++x) {
            this.addSlotToContainer(new Slot(inv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
        }
    }

    // Player Inventory, Slot 0-8, Slot IDs 36-44
    for (int x = 0; x < 9; ++x) {
        this.addSlotToContainer(new Slot(inv, x, 8 + x * 18, 142));
    }
}

@Override
public boolean canInteractWith(EntityPlayer playerIn) {
	return true;
}

@Override
public ItemStack transferStackInSlot(EntityPlayer playerIn, int fromSlot) {
	ItemStack previous = null;
    Slot slot = (Slot) this.inventorySlots.get(fromSlot);

    if (slot != null && slot.getHasStack()) {
        ItemStack current = slot.getStack();
        previous = current.copy();

        if (fromSlot < 9) {
            // From TE Inventory to Player Inventory
            if (!this.mergeItemStack(current, 9, 37, true))
                return null;
        } else {
            // From Player Inventory to TE Inventory
            if (!this.mergeItemStack(current, 0, 9, false))
                return null;
        }

        if (current.stackSize == 0)
            slot.putStack((ItemStack) null);
        else
            slot.onSlotChanged();

        if (current.stackSize == previous.stackSize)
            return null;
        slot.onPickupFromSlot(playerIn, current);
    }
    return previous;
}

}

Choonster · August 26, 2016

Post your

Block

class.

Side note: I'd recommend using

IItemHandler

instead of

IInventory

and exposing it as a Capability if you want to allow automated access to the inventory by things like hoppers.

You can see my implementation of a vanilla-style chest using

IItemHandler

here. All referenced classes are in the linked repository.

Darki · August 26, 2016

This is my Block Class:

public class BlockChemicalMixer extends BasicBlock{

public BlockChemicalMixer() {
	super(Material.rock, "chemicalmixer", 10F, Tool.PICKAXE, HarvestLevel.IRON);
}

@Override
public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, ItemStack heldItem, EnumFacing side, float hitX, float hitY, float hitZ) {
	if(!world.isRemote){
		player.openGui(Main.INSTANCE, GuiHandler.GUI_ID, world, pos.getX(), pos.getY(), pos.getZ());
	}
	return true;
}

}

Nothing special. When you ask for the BasicBlock class here:

public class BasicBlock extends Block{

public BasicBlock(Material m, String name, float hardness, Tool tool, HarvestLevel level) {
	super(m);
	setUnlocalizedName(name);
	setRegistryName(name);
	setHardness(hardness);
	setCreativeTab(Main.chemTab);
	setHarvestLevel(tool.getToolClass(), level.getLevel());
}

enum HarvestLevel{

	WOOD(0),
	STONE(1),
	IRON(2),
	GOLD(0),
	DIAMOND(3);

	private int level;

	private HarvestLevel(int level) {
		this.level = level;
	}

	private int getLevel(){
		return this.level;
	}

}

enum Tool{
	PICKAXE("pickaxe"),
	AXE("axe"),
	HOE("hoe"),
	SHOVEL("shovel");

	private String toolClass;

	private Tool(String toolClass) {
		this.toolClass = toolClass;
	}

	private String getToolClass(){
		return this.toolClass;
	}

}
}

Choonster · August 26, 2016

You never instantiate your

TileEntity

anywhere. Override

Block#hasTileEntity(IBlockState)

to return

true

and

Block#createTileEntity

to create and return an instance of your

TileEntity

.

Darki · August 26, 2016

Of Course I instantitate my TileEntity in the GUI Handler:

public class GuiHandler implements IGuiHandler{

public static final int GUI_ID = 0;

@Override
public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	if (ID == GUI_ID)
        return new ContainerChemicalMixer(player.inventory, (TileEntityChemicalMixer) world.getTileEntity(new BlockPos(x, y, z)));
	else if (ID == GUI_ID + 1)
        return new ContainerGenerator(player.inventory, (TileEntityGenerator) world.getTileEntity(new BlockPos(x, y, z)));
	return null;
}

@Override
public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	if (ID == GUI_ID)
		return new GuiChemicalMixer(new ContainerChemicalMixer(player.inventory, (TileEntityChemicalMixer) world.getTileEntity(new BlockPos(x, y, z))));
	else if (ID == GUI_ID + 1)
		return new GuiGenerator(new ContainerGenerator(player.inventory, (TileEntityGenerator) world.getTileEntity(new BlockPos(x, y, z))));
	return null;
}

}

Animefan8888 · August 26, 2016

Of Course I instantitate my TileEntity in the GUI Handler:

public class GuiHandler implements IGuiHandler{

public static final int GUI_ID = 0;

@Override
public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	if (ID == GUI_ID)
        return new ContainerChemicalMixer(player.inventory, (TileEntityChemicalMixer) world.getTileEntity(new BlockPos(x, y, z)));
	else if (ID == GUI_ID + 1)
        return new ContainerGenerator(player.inventory, (TileEntityGenerator) world.getTileEntity(new BlockPos(x, y, z)));
	return null;
}

@Override
public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	if (ID == GUI_ID)
		return new GuiChemicalMixer(new ContainerChemicalMixer(player.inventory, (TileEntityChemicalMixer) world.getTileEntity(new BlockPos(x, y, z))));
	else if (ID == GUI_ID + 1)
		return new GuiGenerator(new ContainerGenerator(player.inventory, (TileEntityGenerator) world.getTileEntity(new BlockPos(x, y, z))));
	return null;
}

}

What about when it is placed?

Choonster · August 26, 2016

Of Course I instantitate my TileEntity in the GUI Handler:

public class GuiHandler implements IGuiHandler{

public static final int GUI_ID = 0;

@Override
public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	if (ID == GUI_ID)
        return new ContainerChemicalMixer(player.inventory, (TileEntityChemicalMixer) world.getTileEntity(new BlockPos(x, y, z)));
	else if (ID == GUI_ID + 1)
        return new ContainerGenerator(player.inventory, (TileEntityGenerator) world.getTileEntity(new BlockPos(x, y, z)));
	return null;
}

@Override
public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
	if (ID == GUI_ID)
		return new GuiChemicalMixer(new ContainerChemicalMixer(player.inventory, (TileEntityChemicalMixer) world.getTileEntity(new BlockPos(x, y, z))));
	else if (ID == GUI_ID + 1)
		return new GuiGenerator(new ContainerGenerator(player.inventory, (TileEntityGenerator) world.getTileEntity(new BlockPos(x, y, z))));
	return null;
}

}

No you don't. You instantiate the

Gui

and the

Container

using the

TileEntity

you get from the

World

(which will be

null

).

Side note: Store each GUI ID in its own field, don't calculate them in the method. Consider using a

switch

statement instead of an

if

-

else

chain.

Darki · August 26, 2016

Ok I try it. but i instantitate the TileEntity in the Container Class:

private TileEntityChemicalMixer tileentiy;

And then:

	public ContainerChemicalMixer(IInventory inv, TileEntityChemicalMixer tileentity) {
	this.tileentiy = tileentity;
	this.addSlotToContainer(new Slot(inv, 36, 30, 17));
	this.addSlotToContainer(new Slot(inv, 37, 130, 17));
	this.addSlotToContainer(new OutputSlot(inv, 38, 80, 51));

    // Player Inventory, Slot 9-35, Slot IDs 9-35
    for (int y = 0; y < 3; ++y) {
        for (int x = 0; x < 9; ++x) {
            this.addSlotToContainer(new Slot(inv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
        }
    }

    // Player Inventory, Slot 0-8, Slot IDs 36-44
    for (int x = 0; x < 9; ++x) {
        this.addSlotToContainer(new Slot(inv, x, 8 + x * 18, 142));
    }
}

Choonster · August 26, 2016

Ok I try it. but i instantitate the TileEntity in the Container Class:

private TileEntityChemicalMixer tileentiy;

And then:

	public ContainerChemicalMixer(IInventory inv, TileEntityChemicalMixer tileentity) {
	this.tileentiy = tileentity;
	this.addSlotToContainer(new Slot(inv, 36, 30, 17));
	this.addSlotToContainer(new Slot(inv, 37, 130, 17));
	this.addSlotToContainer(new OutputSlot(inv, 38, 80, 51));

    // Player Inventory, Slot 9-35, Slot IDs 9-35
    for (int y = 0; y < 3; ++y) {
        for (int x = 0; x < 9; ++x) {
            this.addSlotToContainer(new Slot(inv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
        }
    }

    // Player Inventory, Slot 0-8, Slot IDs 36-44
    for (int x = 0; x < 9; ++x) {
        this.addSlotToContainer(new Slot(inv, x, 8 + x * 18, 142));
    }
}

Again, you're not instantiating it there (and you shouldn't be), you're simply declaring a field and constructor parameter and assigning the constructor parameter to the field.

Instantiating means "creating an instance of", i.e. the

new

operator.

Darki · August 26, 2016

Ok...Is it possible, when I save the Inventory of the GUI in the NBTList (in TileEntity Class) save also the Blockpos of the Machine...so that I can identify the Gui to the BlockPos

Draco18s · August 26, 2016

"GUI" and "NBT" should never be used in the same sentence.

And GUIs don't contain Inventory items, they display Inventory items.

TL;DR: You're doing everything wrong.

Block -> creates TileEntity

TileEntity -> contains Items

Container -> wraps around TileEntity

GuiContainer -> displays Container

Darki · August 26, 2016

Hm I didnt do this wrong so you said...I did it...or not? I watched a Tutorial...and this is the solution from the Tutorial

Animefan8888 · August 26, 2016

Hm I didnt do this wrong so you said...I did it...or not? I watched a Tutorial...and this is the solution from the Tutorial

Do you have either a class that extends BlockContainer or a class that extends Block that Overrides hasTileEntity() and createTileEntity(). If not you didn't do it right. And that tutorial is wrong.

Draco18s · August 26, 2016

Hm I didnt do this wrong so you said...I did it...or not? I watched a Tutorial...and this is the solution from the Tutorial

You did something wrong, because you didn't do this:

Do you have either a class that extends BlockContainer or a class that extends Block that Overrides hasTileEntity() and createTileEntity(). If not you didn't do it right. And that tutorial is wrong.

Please do the latter, do not use BlockContainer.

Darki · August 26, 2016

Ok that wasnt in the Tutorial...now I added it:

public class BlockChemicalMixer extends BasicBlock{

public BlockChemicalMixer() {
	super(Material.rock, "chemicalmixer", 10F, Tool.PICKAXE, HarvestLevel.IRON);
	isBlockContainer = true;
}

@Override
public TileEntity createTileEntity(World world, IBlockState state) {
	return new TileEntityChemicalMixer();
}

@Override
public boolean hasTileEntity() {
	return true;
}

@Override
public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumHand hand, ItemStack heldItem, EnumFacing side, float hitX, float hitY, float hitZ) {
	if(!world.isRemote){
		player.openGui(Main.INSTANCE, GuiHandler.GUI_ID, world, pos.getX(), pos.getY(), pos.getZ());
	}
	return true;
}

}

is it right now?

Draco18s · August 26, 2016

I unno. Does your code run now?

Darki · August 26, 2016

No here the same the like before:

TheMasterGabriel · August 26, 2016

public class ContainerChemicalMixer extends Container{

private TileEntityChemicalMixer tileentiy;

public ContainerChemicalMixer(IInventory inv, TileEntityChemicalMixer tileentity) {
	this.tileentiy = tileentity;
	this.addSlotToContainer(new Slot(inv, 36, 30, 17));
	this.addSlotToContainer(new Slot(inv, 37, 130, 17));
	this.addSlotToContainer(new OutputSlot(inv, 38, 80, 51));

    // Player Inventory, Slot 9-35, Slot IDs 9-35
    for (int y = 0; y < 3; ++y) {
        for (int x = 0; x < 9; ++x) {
            this.addSlotToContainer(new Slot(inv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
        }
    }

    // Player Inventory, Slot 0-8, Slot IDs 36-44
    for (int x = 0; x < 9; ++x) {
        this.addSlotToContainer(new Slot(inv, x, 8 + x * 18, 142));
    }
}

@Override
public boolean canInteractWith(EntityPlayer playerIn) {
	return true;
}

@Override
public ItemStack transferStackInSlot(EntityPlayer playerIn, int fromSlot) {
	ItemStack previous = null;
    Slot slot = (Slot) this.inventorySlots.get(fromSlot);

    if (slot != null && slot.getHasStack()) {
        ItemStack current = slot.getStack();
        previous = current.copy();

        if (fromSlot < 9) {
            // From TE Inventory to Player Inventory
            if (!this.mergeItemStack(current, 9, 37, true))
                return null;
        } else {
            // From Player Inventory to TE Inventory
            if (!this.mergeItemStack(current, 0, 9, false))
                return null;
        }

        if (current.stackSize == 0)
            slot.putStack((ItemStack) null);
        else
            slot.onSlotChanged();

        if (current.stackSize == previous.stackSize)
            return null;
        slot.onPickupFromSlot(playerIn, current);
    }
    return previous;
}

}

In your container constructor, you are linking the slots to the player's inventory (not your tile entity), which is why the same items persist over different blocks.

Draco18s · August 26, 2016

In your container constructor, you are adding the inventory slots to the player's inventory (not your tile entity), which is why the same items persist over different blocks.

For* the player's inventory. This class is just a representation of the inventory that already exists, you're not adding to that, you're creating the representation.

But yes, the problem is that the slots you want to use to represent the TileEntity's inventory you're telling the program to look at the player's inventory for the contents.

Darki · August 27, 2016

Oh I see it I have to make addSlot (tileentity.inventory...)

Darki · August 27, 2016

No I changed this. In the method addSlot I changed the player inv to the tileentity inv but now there is a nullpointer exception. It seems like that the inventory is null but:

public InventoryBasic inv;
private static int ID = 0;

public TileEntityChemicalMixer(){
	inv = new InventoryBasic("Chemical Mixer", false, 3);
}

the inv gets a new Inventory?

Here the Error:

[12:29:36] [server thread/FATAL]: Error executing task

java.util.concurrent.ExecutionException: java.lang.NullPointerException

at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_101]

at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_101]

at net.minecraft.util.Util.runTask(Util.java:24) [util.class:?]

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:738) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:683) [MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:155) [integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:532) [MinecraftServer.class:?]

at java.lang.Thread.run(Unknown Source) [?:1.8.0_101]

Caused by: java.lang.NullPointerException

at me.darki.chemmix.containers.ContainerChemicalMixer.<init>(ContainerChemicalMixer.java:18) ~[ContainerChemicalMixer.class:?]

at me.darki.chemmix.guis.GuiHandler.getServerGuiElement(GuiHandler.java:19) ~[GuiHandler.class:?]

at net.minecraftforge.fml.common.network.NetworkRegistry.getRemoteGuiContainer(NetworkRegistry.java:244) ~[NetworkRegistry.class:?]

at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:80) ~[FMLNetworkHandler.class:?]

at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2693) ~[EntityPlayer.class:?]

at me.darki.chemmix.blocks.BlockChemicalMixer.onBlockActivated(BlockChemicalMixer.java:36) ~[blockChemicalMixer.class:?]

at net.minecraft.server.management.PlayerInteractionManager.processRightClickBlock(PlayerInteractionManager.java:473) ~[PlayerInteractionManager.class:?]

at net.minecraft.network.NetHandlerPlayServer.processRightClickBlock(NetHandlerPlayServer.java:706) ~[NetHandlerPlayServer.class:?]

at net.minecraft.network.play.client.CPacketPlayerTryUseItem.processPacket(CPacketPlayerTryUseItem.java:68) ~[CPacketPlayerTryUseItem.class:?]

at net.minecraft.network.play.client.CPacketPlayerTryUseItem.processPacket(CPacketPlayerTryUseItem.java:13) ~[CPacketPlayerTryUseItem.class:?]

at net.minecraft.network.PacketThreadUtil$1.run(PacketThreadUtil.java:15) ~[PacketThreadUtil$1.class:?]

at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_101]

at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_101]

at net.minecraft.util.Util.runTask(Util.java:23) ~[util.class:?]

... 5 more

and here the updated constructor:

public ContainerChemicalMixer(IInventory inv, TileEntityChemicalMixer tileentity) {
	this.tileentiy = tileentity;
	this.addSlotToContainer(new Slot(tileentity.inv, 0, 30, 17));
	this.addSlotToContainer(new Slot(tileentity.inv, 1, 130, 17));
	this.addSlotToContainer(new OutputSlot(tileentity.inv, 2, 80, 51));

    // Player Inventory, Slot 9-35, Slot IDs 9-35
    for (int y = 0; y < 3; ++y) {
        for (int x = 0; x < 9; ++x) {
            this.addSlotToContainer(new Slot(inv, x + y * 9 + 9, 8 + x * 18, 84 + y * 18));
        }
    }

    // Player Inventory, Slot 0-8, Slot IDs 36-44
    for (int x = 0; x < 9; ++x) {
        this.addSlotToContainer(new Slot(inv, x, 8 + x * 18, 142));
    }
}

Choonster · August 27, 2016

Caused by: java.lang.NullPointerException

at me.darki.chemmix.containers.ContainerChemicalMixer.<init>(ContainerChemicalMixer.java:18) ~[ContainerChemicalMixer.class:?]

at me.darki.chemmix.guis.GuiHandler.getServerGuiElement(GuiHandler.java:19) ~[GuiHandler.class:?]

at net.minecraftforge.fml.common.network.NetworkRegistry.getRemoteGuiContainer(NetworkRegistry.java:244) ~[NetworkRegistry.class:?]

at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:80) ~[FMLNetworkHandler.class:?]

at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2693) ~[EntityPlayer.class:?]

at me.darki.chemmix.blocks.BlockChemicalMixer.onBlockActivated(BlockChemicalMixer.java:36) ~[blockChemicalMixer.class:?]

You accessed a field/method of a

null

value on line 18 of

ContainerChemicalMixer

.

Darki · August 27, 2016

Yeah this is what I said when I add the Slot to the Container with the TileEntityInventory the inventory seems to be null

Choonster · August 27, 2016

The

tileentity

argument of the

ContainerChemicalMixer

constructor is

null

. This is because you override the wrong overload of

Block#hasTileEntity

. You need to override the one that takes an

IBlockState

argument instead of the one that takes no arguments.

Setting the

Block#isBlockContainer

field is pointless, it's never used anywhere.

Darki · August 27, 2016

Thanks man, now its working...but one little question I have anymore. Why is there a 10: NBTTagList list = compound.getTagList("ItemStacks-" + ID, 10);

in:

@Override
public void readFromNBT(NBTTagCompound compound) {
	super.readFromNBT(compound);
	NBTTagList list = compound.getTagList("ItemStacks-" + ID, 10);
	this.inv = new InventoryBasic("Chemical Mixer", false, 3);
	for(int i = 0; i < list.tagCount(); i++){
		NBTTagCompound tag = list.getCompoundTagAt(i);
		byte b = tag.getByte("Slot");
		if(b >= 0 && b < inv.getSizeInventory()){
			inv.setInventorySlotContents(b, ItemStack.loadItemStackFromNBT(tag));
		}
	}
}

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[1.9] TileEntity - Assigne new NBTCompound

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