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Open GUI on custom Mob

mattbaker

By mattbaker
in Modder Support

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mattbaker

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Posted

Hello,

 

I try to open a GUI's custom mob when I right-click on him, but thats crashed directly : 


java.lang.NullPointerException: null
	at net.mattbaker.guardscraft.block.containerblock.TestContainer.addOwnSlots(TestContainer.java:52) ~[TestContainer.class:?]
	at net.mattbaker.guardscraft.block.containerblock.TestContainer.<init>(TestContainer.java:24) ~[TestContainer.class:?]
	at net.mattbaker.guardscraft.block.pedestal.ModGuiHandler.getServerGuiElement(ModGuiHandler.java:39) ~[ModGuiHandler.class:?]
	at net.mattbaker.guardscraft.block.pedestal.ModGuiHandler.getClientGuiElement(ModGuiHandler.java:69) ~[ModGuiHandler.class:?]
	at net.minecraftforge.fml.common.network.NetworkRegistry.getLocalGuiContainer(NetworkRegistry.java:276) ~[NetworkRegistry.class:?]
	at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:111) ~[FMLNetworkHandler.class:?]
	at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2809) ~[EntityPlayer.class:?]
	at net.mattbaker.guardscraft.marchand.EntityMarchand.processInteract(EntityMarchand.java:95) ~[EntityMarchand.class:?]
	at net.minecraft.entity.EntityLiving.processInitialInteract(EntityLiving.java:1355) ~[EntityLiving.class:?]
	at net.minecraft.entity.player.EntityPlayer.interactOn(EntityPlayer.java:1299) ~[EntityPlayer.class:?]
	at net.minecraft.client.multiplayer.PlayerControllerMP.interactWithEntity(PlayerControllerMP.java:587) ~[PlayerControllerMP.class:?]
	at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1682) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2381) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2147) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1935) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1188) ~[Minecraft.class:?]
	at net.minecraft.client.Minecraft.run(Minecraft.java:442) [Minecraft.class:?]
	at net.minecraft.client.main.Main.main(Main.java:118) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_201]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201]
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
	at GradleStart.main(GradleStart.java:25) [start/:?]
[16:07:18] [Client thread/INFO] [STDOUT]: [net.minecraft.init.Bootstrap:printToSYSOUT:629]: ---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 1/23/19 4:07 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at net.mattbaker.guardscraft.block.containerblock.TestContainer.addOwnSlots(TestContainer.java:52)
	at net.mattbaker.guardscraft.block.containerblock.TestContainer.<init>(TestContainer.java:24)
	at net.mattbaker.guardscraft.block.pedestal.ModGuiHandler.getServerGuiElement(ModGuiHandler.java:39)
	at net.mattbaker.guardscraft.block.pedestal.ModGuiHandler.getClientGuiElement(ModGuiHandler.java:69)
	at net.minecraftforge.fml.common.network.NetworkRegistry.getLocalGuiContainer(NetworkRegistry.java:276)
	at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:111)
	at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2809)
	at net.mattbaker.guardscraft.marchand.EntityMarchand.processInteract(EntityMarchand.java:95)
	at net.minecraft.entity.EntityLiving.processInitialInteract(EntityLiving.java:1355)
	at net.minecraft.entity.player.EntityPlayer.interactOn(EntityPlayer.java:1299)
	at net.minecraft.client.multiplayer.PlayerControllerMP.interactWithEntity(PlayerControllerMP.java:587)
	at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1682)
	at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2381)
	at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2147)
	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1935)
	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1188)
	at net.minecraft.client.Minecraft.run(Minecraft.java:442)
	at net.minecraft.client.main.Main.main(Main.java:118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
	at GradleStart.main(GradleStart.java:25)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
	at net.mattbaker.guardscraft.block.containerblock.TestContainer.addOwnSlots(TestContainer.java:52)
	at net.mattbaker.guardscraft.block.containerblock.TestContainer.<init>(TestContainer.java:24)
	at net.mattbaker.guardscraft.block.pedestal.ModGuiHandler.getServerGuiElement(ModGuiHandler.java:39)
	at net.mattbaker.guardscraft.block.pedestal.ModGuiHandler.getClientGuiElement(ModGuiHandler.java:69)
	at net.minecraftforge.fml.common.network.NetworkRegistry.getLocalGuiContainer(NetworkRegistry.java:276)
	at net.minecraftforge.fml.common.network.internal.FMLNetworkHandler.openGui(FMLNetworkHandler.java:111)
	at net.minecraft.entity.player.EntityPlayer.openGui(EntityPlayer.java:2809)
	at net.mattbaker.guardscraft.marchand.EntityMarchand.processInteract(EntityMarchand.java:95)
	at net.minecraft.entity.EntityLiving.processInitialInteract(EntityLiving.java:1355)
	at net.minecraft.entity.player.EntityPlayer.interactOn(EntityPlayer.java:1299)
	at net.minecraft.client.multiplayer.PlayerControllerMP.interactWithEntity(PlayerControllerMP.java:587)
	at net.minecraft.client.Minecraft.rightClickMouse(Minecraft.java:1682)
	at net.minecraft.client.Minecraft.processKeyBinds(Minecraft.java:2381)
	at net.minecraft.client.Minecraft.runTickKeyboard(Minecraft.java:2147)

 

The GUI comes from a tutorial to create and open this GUI, but with a block, and this code works.

 

I you put all classes to know if there is a mistake :

 

The Container :

  

package net.mattbaker.guardscraft.block.containerblock;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;

import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.IItemHandler;
import net.minecraftforge.items.SlotItemHandler;

public class TestContainer extends Container 
{
	private TestContainerTileEntity te;

    public TestContainer(IInventory playerInventory, TestContainerTileEntity te) 
    {
        this.te = te;

        // This container references items out of our own inventory (the 9 slots we hold ourselves)
        // as well as the slots from the player inventory so that the user can transfer items between
        // both inventories. The two calls below make sure that slots are defined for both inventories.
        addOwnSlots();
        addPlayerSlots(playerInventory);
    }

    private void addPlayerSlots(IInventory playerInventory) 
    {
        // Slots for the main inventory
        for(int row = 0; row < 3; ++row) 
        {
            for(int col = 0; col < 9; ++col) 
            {
                int x = 9 + col * 18;
                int y = row * 18 + 70;
                this.addSlotToContainer(new Slot(playerInventory, col + row * 9 + 10, x, y));
            }
        }

        // Slots for the hotbar
        for(int row = 0; row < 9; ++row) 
        {
            int x = 9 + row * 18;
            int y = 58 + 70;
            this.addSlotToContainer(new Slot(playerInventory, row, x, y));
        }
    }

    private void addOwnSlots() 
    {
        IItemHandler itemHandler = this.te.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, null);
        int x = 9;
        int y = 6;

        // Add our own slots
        int slotIndex = 0;
        for (int i = 0; i < itemHandler.getSlots(); i++) 
        {
            addSlotToContainer(new SlotItemHandler(itemHandler, slotIndex, x, y));
            slotIndex++;
            x += 18;
        }
    }

    @Override
    public ItemStack transferStackInSlot(EntityPlayer playerIn, int index) 
    {
        ItemStack itemstack = ItemStack.EMPTY;
        Slot slot = this.inventorySlots.get(index);

        if(slot != null && slot.getHasStack()) 
        {
            ItemStack itemstack1 = slot.getStack();
            itemstack = itemstack1.copy();

            if(index < TestContainerTileEntity.SIZE) 
            {
                if(!this.mergeItemStack(itemstack1, TestContainerTileEntity.SIZE, this.inventorySlots.size(), true)) 
                { return ItemStack.EMPTY; }
            } 
            else if (!this.mergeItemStack(itemstack1, 0, TestContainerTileEntity.SIZE, false)) 
            { return ItemStack.EMPTY; }

            if (itemstack1.isEmpty()) 
            { slot.putStack(ItemStack.EMPTY); } 
            else 
            { slot.onSlotChanged(); }
        }

        return itemstack;
    }

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

 

The original block which serves of base for my mob and which works :

  

package net.mattbaker.guardscraft.block.containerblock;

import net.mattbaker.guardscraft.GuardsCraft;
import net.mattbaker.guardscraft.block.BlockBase;
import net.mattbaker.guardscraft.block.pedestal.ModGuiHandler;

import net.minecraft.block.Block;
import net.minecraft.block.ITileEntityProvider;
import net.minecraft.block.SoundType;
import net.minecraft.block.material.Material;
import net.minecraft.block.state.IBlockState;
import net.minecraft.client.renderer.block.model.ModelResourceLocation;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.Entity;
import net.minecraft.entity.INpc;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.Item;
import net.minecraft.item.ItemBlock;
import net.minecraft.item.ItemStack;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.world.World;

import net.minecraftforge.client.model.ModelLoader;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class TestContainerBlock extends Block implements ITileEntityProvider//, net.minecraft.entity.monster.IMob
{
	public static final int GUI_ID = 1;
	protected String name;
	
	/*
	public TestContainerBlock(Material material, String unlocalizedName, String registryName) 
	{ this(material, SoundType.STONE, unlocalizedName, registryName); }
	
	//Constructeur (Avec le son en plus).
    public TestContainerBlock(Material material, SoundType sound, String unlocalizedName, String registryName) 
    {
    	//"super()" permet d'appeler un constructeur parent."
    	super(material);
    	//Fonction utilisée pour les fichiers de langues.
        setUnlocalizedName(GuardsCraft.MODID + "." + unlocalizedName);
        //Fonction qui enregistre l'objet auprès de Forge avec un ID unique.
        setRegistryName(registryName);
        //Fonction qui place le bloc dans la table "TUTORIAL_TAB" (En Creative).
        setCreativeTab(GuardsCraft.TUTORIAL_TAB);
        //Fonction qui change le son.
        setSoundType(sound);
    } 
    */
	/*
	public TestContainerBlock() 
	{
        super(Material.ROCK);
        setUnlocalizedName(GuardsCraft.MODID + ".testcontainerblock");
        setRegistryName("testcontainerblock");
    }
	*/
	
	public TestContainerBlock(String name) 
	{
		super(Material.ROCK);
		//super(Material.ROCK, name);
	}
	
	public TestContainerBlock(Material material, String name) 
	{
		super(material);
	
		this.name = name;
	
		setUnlocalizedName(name);
		setRegistryName(name);
	}
	
	public TestContainerBlock(Material material, String name, BlockPos position) 
	{
		super(material);
		this.name = name;
	
		setUnlocalizedName(name);
		setRegistryName(name);
		
	}
	
	public void registerItemModel(Item itemBlock) 
	{ GuardsCraft.proxy.registerItemRenderer(itemBlock, 0, name); }
	
	public Item createItemBlock() 
	{ return new ItemBlock(this).setRegistryName(getRegistryName()); }
	
	@Override
	public TestContainerBlock setCreativeTab(CreativeTabs tab) 
	{
		super.setCreativeTab(tab);
		return this;
	}
    
    @SideOnly(Side.CLIENT)
    public void initModel() 
    { ModelLoader.setCustomModelResourceLocation(Item.getItemFromBlock(this), 0, new ModelResourceLocation(getRegistryName(), "inventory")); }
    
    @Override
    public TileEntity createNewTileEntity(World worldIn, int meta) 
    { return new TestContainerTileEntity(); }
      
    @Override
    public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) 
    {   	
    	//TestContainerBlock test = new TestContainerBlock();
    	//BlockPos testPos = new BlockPos(playerIn);
    	
    	if(worldIn.isRemote)
    	{	
    		/*
    		System.out.println("Interaction avec le bloc : ");
    		System.out.println("GuardsCraft.instance : " + GuardsCraft.instance);
    		System.out.println("world : " + worldIn);
    		System.out.println("this.getPosition().getX() : " + pos.getX());
    		System.out.println("this.getPosition().getY() : " + pos.getY());
    		System.out.println("this.getPosition().getZ() : " + pos.getZ());
    		
	    	playerIn.sendMessage(new TextComponentString("testContainerBlock : "));
	    	playerIn.sendMessage(new TextComponentString("GuardsCraft.instance : " + GuardsCraft.instance));
	    	*/
	    	/*
	    	playerIn.sendMessage(new TextComponentString("testPos.getX() : " + testPos.getX()));
	    	playerIn.sendMessage(new TextComponentString("testPos.getY() : " + testPos.getY()));
	    	playerIn.sendMessage(new TextComponentString("testPos.getZ() : " + testPos.getZ()));
	    	*/
	    	/*
	    	playerIn.sendMessage(new TextComponentString("world : " + worldIn));
	    	playerIn.sendMessage(new TextComponentString("pos.getX() : " + pos.getX()));
	    	playerIn.sendMessage(new TextComponentString("pos.getY() : " + pos.getY()));
	    	playerIn.sendMessage(new TextComponentString("pos.getZ() : " + pos.getZ()));
	    	*/
	    	//X : "151" Y : "81" Z : "255"
	    	//playerIn.openGui(GuardsCraft.instance, GUI_ID, worldIn, 151, 81, 254);
	    	//playerIn.openGui(GuardsCraft.instance, 1, worldIn, testPos.getX(), testPos.getY(), testPos.getZ());
	    	
	    	playerIn.openGui(GuardsCraft.instance, 1, worldIn, pos.getX(), pos.getY(), pos.getZ());
	    	//playerIn.openGui(GuardsCraft.instance, ModGuiHandler.PEDESTAL, worldIn, pos.getX(), pos.getY(), pos.getZ());
	    	
	    	//Only execute on the server
	    	/*
	        if (worldIn.isRemote) 
	        { return true; }
	               
	        TileEntity te = worldIn.getTileEntity(pos);
	        if(!(te instanceof TestContainerTileEntity)) 
	        { return false; }
	    	*/
	    	
	    	
	    	//return super.onBlockActivated(worldIn, pos, state, playerIn, hand, facing, hitX, hitY, hitZ);
	    	
	    	return true; 
    	}
    	else { return false ;}	
    }   
}

 

The GuiContainer :

  

package net.mattbaker.guardscraft.block.containerblock;

import net.mattbaker.guardscraft.GuardsCraft;

import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.util.ResourceLocation;

public class TestContainerGui extends GuiContainer 
{
	public static final int WIDTH = 180;
    public static final int HEIGHT = 152;

    private static final ResourceLocation background = new ResourceLocation(GuardsCraft.MODID, "textures/gui/testcontainer.png");

    public TestContainerGui(TestContainerTileEntity tileEntity, TestContainer container) 
    {
        super(container);

        xSize = WIDTH;
        ySize = HEIGHT;
    }
    
    private InventoryPlayer playerInv;
	
	public TestContainerGui(Container container, InventoryPlayer playerInv) 
	{
		super(container);
		this.playerInv = playerInv;
	}

    @Override
    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY) 
    {
        mc.getTextureManager().bindTexture(background);
        drawTexturedModalRect(guiLeft, guiTop, 0, 0, xSize, ySize);
    }
}

 

The TileEntity :

  

package net.mattbaker.guardscraft.block.containerblock;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;

import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.items.CapabilityItemHandler;
import net.minecraftforge.items.ItemStackHandler;

public class TestContainerTileEntity extends TileEntity 
{	
	public static final int SIZE = 9;

    // This item handler will hold our nine inventory slots
    private ItemStackHandler itemStackHandler = new ItemStackHandler(SIZE) 
    {
        @Override
        protected void onContentsChanged(int slot) 
        {
            // We need to tell the tile entity that something has changed so
            // that the chest contents is persisted
            TestContainerTileEntity.this.markDirty();
        }
    };

    @Override
    public void readFromNBT(NBTTagCompound compound) 
    {
        super.readFromNBT(compound);
        if (compound.hasKey("items")) 
        { itemStackHandler.deserializeNBT((NBTTagCompound) compound.getTag("items")); }
    }

    @Override
    public NBTTagCompound writeToNBT(NBTTagCompound compound) 
    {
        super.writeToNBT(compound);
        compound.setTag("items", itemStackHandler.serializeNBT());
        return compound;
    }

    public boolean canInteractWith(EntityPlayer playerIn) 
    {
        // If we are too far away from this tile entity you cannot use it
        return !isInvalid() && playerIn.getDistanceSq(pos.add(0.5D, 0.5D, 0.5D)) <= 64D;
    }

    @Override
    public boolean hasCapability(Capability<?> capability, EnumFacing facing) 
    {
        if (capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY) 
        { return true; }
        
        return super.hasCapability(capability, facing);
    }

    @Override
    public <T> T getCapability(Capability<T> capability, EnumFacing facing) 
    {
        if (capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY) 
        { return CapabilityItemHandler.ITEM_HANDLER_CAPABILITY.cast(itemStackHandler); }
        
        return super.getCapability(capability, facing);
    }
}

 

The IGuiHandler :

  

package net.mattbaker.guardscraft.block.pedestal;

import net.mattbaker.guardscraft.block.containerblock.TestContainer;
import net.mattbaker.guardscraft.block.containerblock.TestContainerGui;
import net.mattbaker.guardscraft.block.containerblock.TestContainerTileEntity;
import net.mattbaker.guardscraft.block.furnace.ContainerAlloyFurnace;
import net.mattbaker.guardscraft.block.furnace.GuiAlloyFurnace;
import net.mattbaker.guardscraft.block.furnace.TileEntityAlloyFurnace;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.Container;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.World;

import net.minecraftforge.fml.common.network.IGuiHandler;

public class ModGuiHandler implements IGuiHandler 
{
	public static final int PEDESTAL = 0;
	public static final int CONTAINER = 1;
	public static final int ALLOY_FURNACE = 2;
	
	@Override
	public Container getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) 
	{
		switch (ID) 
		{	
			case PEDESTAL :
				return new ContainerPedestal(player.inventory, (TileEntityPedestal)world.getTileEntity(new BlockPos(x, y, z)));
				
			case CONTAINER :
				
				BlockPos pos = new BlockPos(x, y, z);
		        TileEntity te = world.getTileEntity(pos);
		        
		        if(te instanceof TestContainerTileEntity) 
		        { return new TestContainer(player.inventory, (TestContainerTileEntity) te); }
			
			case ALLOY_FURNACE :
				return new ContainerAlloyFurnace(player.inventory, (TileEntityAlloyFurnace) world.getTileEntity(new BlockPos(x, y, z)));
	
			default :
				return null;
		}
	}
	
	@Override
	public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) 
	{
		switch (ID) 
		{
			case PEDESTAL :
				return new GuiPedestal(getServerGuiElement(ID, player, world, x, y, z), player.inventory);
				//return new GuiPedestal(getServerGuiElement(ID, player, world, x, y, z));
				
			case CONTAINER :
				
				BlockPos pos = new BlockPos(x, y, z);
		        TileEntity te = world.getTileEntity(pos);
		        
		        if(te instanceof TestContainerTileEntity) 
		        {
		            TestContainerTileEntity containerTileEntity = (TestContainerTileEntity) te;
		            return new TestContainerGui(containerTileEntity, new TestContainer(player.inventory, containerTileEntity));
		        }	      
			
			case ALLOY_FURNACE :
				return new GuiAlloyFurnace(getServerGuiElement(ID, player, world, x, y, z), player.inventory);
					
			default :
				return null;
		}
	}
}

 

The mob :

  

package net.mattbaker.guardscraft.merchant;

import javax.annotation.Nullable;

//import javax.annotation.Nullable;

import net.mattbaker.guardscraft.GuardsCraft;
import net.mattbaker.guardscraft.block.containerblock.TestContainerTileEntity;
import net.mattbaker.guardscraft.block.pedestal.BlockPedestal;
import net.mattbaker.guardscraft.block.pedestal.ModGuiHandler;
import net.mattbaker.guardscraft.block.pedestal.TileEntityPedestal;
import net.mattbaker.guardscraft.weirdzombie.EntityWeirdZombie;

import net.minecraft.block.ITileEntityProvider;
import net.minecraft.block.state.IBlockState;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.ai.EntityAIHurtByTarget;
import net.minecraft.entity.ai.EntityAILookIdle;
import net.minecraft.entity.ai.EntityAIMoveTowardsRestriction;
import net.minecraft.entity.ai.EntityAINearestAttackableTarget;
import net.minecraft.entity.ai.EntityAISwimming;
import net.minecraft.entity.ai.EntityAIWatchClosest;
import net.minecraft.entity.monster.*;
import net.minecraft.entity.passive.EntityZombieHorse;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.pathfinding.PathNavigate;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.ITextComponent;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.world.World;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilityProvider;

public class EntityMerchant extends EntityMob implements ITileEntityProvider
{
	public static final int GUI_ID = 1;
    public static final ResourceLocation LOOT = new ResourceLocation(GuardsCraft.MODID, "entities/soldat");

    public EntityMerchant(World worldIn)
    {
        super(worldIn);
        setSize(0.6F, 1.95F);
    }
    
    public EntityMerchant setCreativeTab(CreativeTabs tab) 
	{
		//super.setCreativeTab(tab);
		return this;
	}
	
	public Class<TestContainerTileEntity> getTileEntityClass() 
	{ return TestContainerTileEntity.class; }
	
	@Nullable
	public TestContainerTileEntity createTileEntity(World world, IBlockState state) 
	{ return new TestContainerTileEntity(); }
	
    
	@Override
    public TileEntity createNewTileEntity(World worldIn, int meta) 
    { return new TestContainerTileEntity(); }
	
    @Override
    public boolean processInteract(EntityPlayer player, EnumHand hand) 
    {    	    	
    	if(this.getEntityWorld().isRemote)
    	{
    		   		
	    	player.sendMessage(new TextComponentString("Interaction with the merchant : "));
	    	player.sendMessage(new TextComponentString("GuardsCraft.instance : " + GuardsCraft.instance));
	    	player.sendMessage(new TextComponentString("world : " + world));
	    	player.sendMessage(new TextComponentString("this.getPosition().getX() : " + this.getPosition().getX()));
	    	player.sendMessage(new TextComponentString("this.getPosition().getY() : " + this.getPosition().getY()));
	    	player.sendMessage(new TextComponentString("this.getPosition().getZ() : " + this.getPosition().getZ()));
	    	
	    	player.openGui(GuardsCraft.instance, 1, this.getEntityWorld(), this.getPosition().getX(), this.getPosition().getY(), this.getPosition().getZ());
	    	
	    	//player.openGui(GuardsCraft.instance, 1, this.getEntityWorld(), 0, 0, 0);	 	
	    	//player.openGui(GuardsCraft.instance, GUI_ID, world, this.chunkCoordX, this.chunkCoordY, this.chunkCoordZ);    	
	    	    	
	    	//player.openGui(GuardsCraft.instance, GUI_ID, world, 153, 81, 251);
	    	//return super.processInteract(player, hand);
	    	return true;
    	}
    	else { return false; }  	
    }
       
    @Override
    protected void applyEntityAttributes()
    {
        super.applyEntityAttributes();
        // Here we set various attributes for our mob. Like maximum health, armor, speed, ...
        this.getEntityAttribute(SharedMonsterAttributes.FOLLOW_RANGE).setBaseValue(35.0D);
        this.getEntityAttribute(SharedMonsterAttributes.MOVEMENT_SPEED).setBaseValue(0.35D);
        this.getEntityAttribute(SharedMonsterAttributes.ATTACK_DAMAGE).setBaseValue(3.0D);
        this.getEntityAttribute(SharedMonsterAttributes.ARMOR).setBaseValue(2.0D);
    }

    //Fonction qui regroupe les actions possibles du mob.
    @Override
    protected void initEntityAI()
    {
    	//this.getTileEntity(world, pos);
    	//this.getTileEntityClass();
        this.tasks.addTask(0, new EntityAISwimming(this));
        //this.tasks.addTask(2, new EntityAISoldatAttack(this, 1.0D, false));
        //this.tasks.addTask(5, new EntityAIMoveTowardsRestriction(this, 1.0D));
        //this.tasks.addTask(7, new EntityAIWander(this, 1.0D));
        this.tasks.addTask(8, new EntityAIWatchClosest(this, EntityPlayer.class, 8.0F));
        this.tasks.addTask(8, new EntityAILookIdle(this));
        this.applyEntityAI();
    }

    //Fonction qui cible les ennemis.
    private void applyEntityAI() 
    {
    	//this.tasks.addTask(6, new EntityAIMoveThroughVillage(this, 1.0D, false));
        //this.targetTasks.addTask(1, new EntityAIHurtByTarget(this, true, new Class[]{EntityPigZombie.class}));
        //Tue les zombies.
        //this.targetTasks.addTask(2, new EntityAINearestAttackableTarget<EntityZombie>(this, EntityZombie.class, true));
        //Tue les araignées.
        //this.targetTasks.addTask(2, new EntityAINearestAttackableTarget<EntityCaveSpider>(this, EntityCaveSpider.class, true));
        //Tue les chevaux-zombies.
        //this.targetTasks.addTask(2, new EntityAINearestAttackableTarget<EntityZombieHorse>(this, EntityZombieHorse.class, true));
        //Tue les creepers.
        //this.targetTasks.addTask(1, new EntityAINearestAttackableTarget<EntityCreeper>(this, EntityCreeper.class, true));
        //Tue les endermen.
        //this.targetTasks.addTask(2, new EntityAINearestAttackableTarget<EntityEnderman>(this, EntityEnderman.class, true));
        //Tue les squelettes.
        //this.targetTasks.addTask(3, new EntityAINearestAttackableTarget<EntitySkeleton>(this, EntitySkeleton.class, true));
        //Tue les weird zombies.
        //this.targetTasks.addTask(2, new EntityAINearestAttackableTarget<EntityWeirdZombie>(this, EntityWeirdZombie.class, true));       
    }

    @Override
    //@Nullable
    protected ResourceLocation getLootTable() 
    {
        return LOOT;
    }

    @Override
    protected PathNavigate createNavigator(World worldIn) 
    {
    	// TODO Auto-generated method stub
    	return super.createNavigator(worldIn);
    }
}

 

The main class :

  

package net.mattbaker.guardscraft;

import net.mattbaker.guardscraft.events.MyForgeEventHandler;
import net.mattbaker.guardscraft.item.ModItems;
import net.mattbaker.guardscraft.network.PacketRequestUpdatePedestal;
import net.mattbaker.guardscraft.network.PacketUpdatePedestal;
import net.mattbaker.guardscraft.proxy.ClientProxy;
//import net.mattbaker.guardscraft.init.ModItems_autre;
import net.mattbaker.guardscraft.proxy.CommonProxy;
import net.mattbaker.guardscraft.proxy.IProxy;
import net.mattbaker.guardscraft.proxy.ServerProxy;
import net.mattbaker.guardscraft.recipes.TutorialRecipes;
//import net.mattbaker.guardscraft.soldat.EntitySoldat;
import net.mattbaker.guardscraft.tabs.TutorialTab;
import net.mattbaker.guardscraft.util.ModEntities;
import net.mattbaker.guardscraft.world.gen.TutorialWorldGen;
import net.mattbaker.guardscraft.block.containerblock.GuiProxy;
import net.mattbaker.guardscraft.block.furnace.GuiHandler;
import net.mattbaker.guardscraft.block.pedestal.ModGuiHandler;

import net.minecraft.block.Block;
import net.minecraft.creativetab.CreativeTabs;
//import net.minecraft.init.Blocks;
//import net.minecraft.world.World;
import net.minecraft.item.Item;

import net.minecraftforge.client.event.ModelRegistryEvent;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.event.RegistryEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.Mod.EventHandler;
import net.minecraftforge.fml.common.SidedProxy;
import net.minecraftforge.fml.common.event.FMLInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.network.NetworkRegistry;
import net.minecraftforge.fml.common.network.simpleimpl.SimpleNetworkWrapper;
import net.minecraftforge.fml.common.registry.GameRegistry;
import net.minecraftforge.fml.relauncher.Side;

import org.apache.logging.log4j.core.Logger;

@Mod(modid = GuardsCraft.MODID, name = GuardsCraft.NAME, version = GuardsCraft.VERSION)
public class GuardsCraft 
{
	//Doit être "guardscraft" et non "GuardsCraft".
	public static final String MODID = "guardscraft";
    public static final String NAME = "GuardsCraft";
    public static final String VERSION = "1.0";
    public static final String MC_VERSION = "[1.12.2]";

    public static final String CLIENT = "net.mattbaker.guardscraft.proxy.ClientProxy";
    public static final String SERVER = "net.mattbaker.guardscraft.proxy.ServerProxy";
    
    //Ajoute une instance de la table "TUTORIAL_TAB".
    public static final CreativeTabs TUTORIAL_TAB = new TutorialTab("tabTutorialMod");
        
    @Mod.Instance
    public static GuardsCraft instance;
    
    @SidedProxy(clientSide = GuardsCraft.CLIENT, serverSide = GuardsCraft.SERVER)

    public static CommonProxy proxy;
    
    private static Logger logger;
    
    public static SimpleNetworkWrapper network;
    
    @EventHandler
    public void preInit(FMLPreInitializationEvent event)
    {
        logger = (Logger) event.getModLog(); 
        proxy.preInit(event);
        
        //Appels pour le zombie modifié et le soldat.
        //ModEntities.init();
        //ModEntities.initModels();
        
        //Four
        //NetworkRegistry.INSTANCE.registerGuiHandler(this, new GuiHandler());  
        //Pedestal
        NetworkRegistry.INSTANCE.registerGuiHandler(this, new ModGuiHandler());
        //ContainerBlock
        //NetworkRegistry.INSTANCE.registerGuiHandler(this, new GuiProxy());
        
        //Le dernier "NetworkRegistry.INSTANCE.registerGuiHandler()" gagne.
        

        network = NetworkRegistry.INSTANCE.newSimpleChannel(MODID);
        network.registerMessage(new PacketUpdatePedestal.Handler(), PacketUpdatePedestal.class, 0, Side.CLIENT);
        network.registerMessage(new PacketRequestUpdatePedestal.Handler(), PacketRequestUpdatePedestal.class, 1, Side.SERVER);
		
		proxy.registerRenderers();
    }
    
    @EventHandler
    public void init(FMLInitializationEvent event)
    {
        // some example code
        //logger.info("DIRT BLOCK >> {}", Blocks.DIRT.getRegistryName());
        //Item.ToolMaterial;
        
        //Appel de la fonction de la classe TutorialRecipes pour le four.
        //TutorialRecipes.initSmelting();
        
        //Appel de la fonction pour la génération de "minerai".
        //GameRegistry.registerWorldGenerator(new TutorialWorldGen(), 0);
    	
        proxy.init(event);
    }
    
    @EventHandler
    public void postInit(FMLPostInitializationEvent event) 
    {
    	//MinecraftForge.EVENT_BUS.register(new MyForgeEventHandler());
    	
    	proxy.postInit(event);
    }
    
    @Mod.EventBusSubscriber
	public static class RegistrationHandler 
	{
		@SubscribeEvent
		public static void registerItems(RegistryEvent.Register<Item> event) 
		{
			ModItems.register(event.getRegistry());
		}	
		
		@SubscribeEvent
		public static void registerItems(ModelRegistryEvent event) 
		{
			ModItems.registerModels();
		}
	}
}

 

I have too tried to open a GUI with an item, but this is the same thing : a crash.

 

Tell me if you need more informations, I searched since 3 weeks, this which explains why there are so  codes lines in comments.

 

Regards.

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