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Hey inlanoche, thanks for everything. Oh, and that poor gnome :sad.gif:

Anyways, i was tinkering with my codes a bit. I figured a way to open inventory when right clicking a mob with.. an item. I though you could use it and am sharing it. ( with anyone)

Although its a bit stupid because you can open the mobs inventory right away without taming but you can fit it in...

I'm a bad guide and teacher, so i couldn't really make this tutorialish but i might edit this reply when i have time, which i don't right now.

So , in your EntitySomething code add this:

    public boolean interact(EntityPlayer entityplayer)
    {
        ItemStack itemstack = entityplayer.inventory.getCurrentItem();

            if(itemstack != null && itemstack.itemID == Item.bone.shiftedIndex) 
            {

                {
                    ModLoader.OpenGUI(entityplayer, new SomethingInventoryGui(entityplayer.inventory, inventory));
                }
                return true;
            } else
            	
                return false;
            

      }

This is where the game opens the inventory/gui when you right click it. As you can see in this part:

            if(itemstack != null && itemstack.itemID == Item.bone.shiftedIndex)

You must right click the mob with a bone to open its inventory.

You must also add this below all your codes.

    public SomethingInventory inventory;

SomethingInventory(entityplayer.inventory, inventory));

There is a bit more you must add, here is the full code for EntitySomething.

Full EntitySomething code(edit accordingly!):

package net.minecraft.src;

import java.util.List;
import java.util.Random;

public class EntitySomething extends EntityAnimal
{
        public EntitySomething(World world)
        {
                super(world);
                inventory = new SomethingInventory(this);
                texture = "/something.png";        // your mob texture 
                setSize(0.9F*1.25F, 0.9F*1.25F);
                moveSpeed = 0.75F;
                //yOffset *= 6F;
        health = 15;

                           
        }
    public void writeEntityToNBT(NBTTagCompound nbttagcompound) 
    { 
        super.writeEntityToNBT(nbttagcompound); 
        nbttagcompound.setTag("Inventory", inventory.writeToNBT(new NBTTagList())); // it writes the inventory t
    } 
    
    public void onDeath(Entity entity)  //when mob dies
    { 
        
        inventory.dropAllItems();   // when dead drop all inventory! **
        super.onDeath(entity);
    }
    
    
 
    public void readEntityFromNBT(NBTTagCompound nbttagcompound) 
    { 
        super.readEntityFromNBT(nbttagcompound); 
        NBTTagList nbttaglist = nbttagcompound.getTagList("Inventory"); // must read inventory
        inventory.readFromNBT(nbttaglist);
    } 
 
    protected String getLivingSound()  // sounds, edit them accordingly...
    { 
        return "Something"; 
    } 
 
    protected String getHurtSound() 
    { 
        return "SomethingHurt"; 
    } 
 
    protected String getDeathSound() 
    { 
        return "SomethingDeath"; 
    } 
 
    protected float getSoundVolume() 
    { 
        return 0.6F; 
    } 
 
    protected int getDropItemId() 
    { 
        return 0; 
    } 
    
    protected void dropFewItems() // what the mob drops when killed
    {
        int i = rand.nextInt(3);
        for(int j = 0; j < i; j++)
        {
            dropItem(Item.leather.shiftedIndex, 1); //sometimes leather
        }

        i = rand.nextInt(3);
        for(int k = 0; k < i; k++)
        {
            dropItem(Item.egg.shiftedIndex, 1); // sometimes eggs
        }
    }
    

    public boolean interact(EntityPlayer entityplayer)
    {
        ItemStack itemstack = entityplayer.inventory.getCurrentItem();

            if(itemstack != null && itemstack.itemID == Item.bone.shiftedIndex)
            {

                {
                    ModLoader.OpenGUI(entityplayer, new SomethingInventoryGui(entityplayer.inventory, inventory));
                }
                return true;
            } else
            	
                return false;
            

      }
  
    public SomethingInventory inventory;
}

This here is the gui of the inventory. Here is the code for that one.

SomethingInventoryGui:

// Decompiled by Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) braces deadcode 

package net.minecraft.src;

import net.minecraft.client.Minecraft;
import org.lwjgl.opengl.GL11;

// Referenced classes of package net.minecraft.src:
//            GuiContainer, CJB_DogContainer, FontRenderer, RenderEngine, 
//            InventoryPlayer, CJB_DogInventory

public class SomethingInventoryGui extends GuiContainer
{

    public SomethingInventoryGui(InventoryPlayer inventoryplayer, SomethingInventory somethinginventory)
    {
        super(new SomethingContainer(inventoryplayer, somethinginventory));
    }

    protected void drawGuiContainerForegroundLayer()
    {
        fontRenderer.drawString("Inventory", 52, 6, 0x404040); // name of inventory displaced on top
        fontRenderer.drawString("Inventory", 8, (ySize - 96) + 2, 0x404040);
    }

    protected void drawGuiContainerBackgroundLayer(float f)
    {
        int i = mc.renderEngine.getTexture("/inventory.png"); //place for inventory texture
        GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
        mc.renderEngine.bindTexture(i);
        int j = (width - xSize) / 2;
        int k = (height - ySize) / 2;
        drawTexturedModalRect(j, k, 0, 0, xSize, ySize);
    }

    public boolean doesGuiPauseGame()
    {
        return true;
    }
}

Here is where you define your gui. You must make the texture too. Here is one:

        int i = mc.renderEngine.getTexture("/inventory.png"); //place for inventory texture

http://www.2shared.com/photo/wVkMVbKB/inventory.html

Now you also need the gui code, like so:

SomethingInventory:

// Decompiled by Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) braces deadcode 

package net.minecraft.src;


// Referenced classes of package net.minecraft.src:
//            IInventory, ItemStack, NBTTagCompound, NBTTagList, 
//            SomethingEntity, EntityPlayer, ItemArmor

public class SomethingInventory
    implements IInventory
{

    public SomethingInventory(EntitySomething entitysomething) //your entity
    {
        inventory = new ItemStack[9];
        inventoryChanged = false;
        ent = entitysomething;
    }

    private int getInventorySlotContainItem(int i)
    {
        for(int j = 0; j < inventory.length; j++)
        {
            if(inventory[j] != null && inventory[j].itemID == i)
            {
                return j;
            }
        }

        return -1;
    }

    public int storeItemStack(ItemStack itemstack)
    {
        for(int i = 0; i < inventory.length; i++)
        {
            if(inventory[i] != null && inventory[i].itemID == itemstack.itemID && inventory[i].isStackable() && inventory[i].stackSize < inventory[i].getMaxStackSize() && inventory[i].stackSize < getInventoryStackLimit() && (!inventory[i].getHasSubtypes() || inventory[i].getItemDamage() == itemstack.getItemDamage()))
            {
                return i;
            }
        }

        return -1;
    }

    public int getFirstEmptyStack()
    {
        for(int i = 0; i < inventory.length; i++)
        {
            if(inventory[i] == null)
            {
                return i;
            }
        }

        return -1;
    }

    private int storePartialItemStack(ItemStack itemstack)
    {
        int i = itemstack.itemID;
        int j = itemstack.stackSize;
        int k = storeItemStack(itemstack);
        if(k < 0)
        {
            k = getFirstEmptyStack();
        }
        if(k < 0)
        {
            return j;
        }
        if(inventory[k] == null)
        {
            inventory[k] = new ItemStack(i, 0, itemstack.getItemDamage());
        }
        int l = j;
        if(l > inventory[k].getMaxStackSize() - inventory[k].stackSize)
        {
            l = inventory[k].getMaxStackSize() - inventory[k].stackSize;
        }
        if(l > getInventoryStackLimit() - inventory[k].stackSize)
        {
            l = getInventoryStackLimit() - inventory[k].stackSize;
        }
        if(l == 0)
        {
            return j;
        } else
        {
            j -= l;
            inventory[k].stackSize += l;
            inventory[k].animationsToGo = 5;
            return j;
        }
    }

    public boolean consumeInventoryItem(int i)
    {
        int j = getInventorySlotContainItem(i);
        if(j < 0)
        {
            return false;
        }
        if(--inventory[j].stackSize <= 0)
        {
            inventory[j] = null;
        }
        return true;
    }

    public boolean addItemStackToInventory(ItemStack itemstack)
    {
        if(!itemstack.isItemDamaged())
        {
            int i;
            do
            {
                i = itemstack.stackSize;
                itemstack.stackSize = storePartialItemStack(itemstack);
            } while(itemstack.stackSize > 0 && itemstack.stackSize < i);
            return itemstack.stackSize < i;
        }
        int j = getFirstEmptyStack();
        if(j >= 0)
        {
            inventory[j] = ItemStack.copyItemStack(itemstack);
            itemstack.stackSize = 0;
            return true;
        } else
        {
            return false;
        }
    }

    public ItemStack decrStackSize(int i, int j)
    {
        ItemStack aitemstack[] = inventory;
        if(i >= inventory.length)
        {
            aitemstack = armorInventory;
            i -= inventory.length;
        }
        if(aitemstack[i] != null)
        {
            if(aitemstack[i].stackSize <= j)
            {
                ItemStack itemstack = aitemstack[i];
                aitemstack[i] = null;
                return itemstack;
            }
            ItemStack itemstack1 = aitemstack[i].splitStack(j);
            if(aitemstack[i].stackSize == 0)
            {
                aitemstack[i] = null;
            }
            return itemstack1;
        } else
        {
            return null;
        }
    }

    public void setInventorySlotContents(int i, ItemStack itemstack)
    {
        ItemStack aitemstack[] = inventory;
        if(i >= aitemstack.length)
        {
            i -= aitemstack.length;
            aitemstack = armorInventory;
        }
        aitemstack[i] = itemstack;
    }

    public NBTTagList writeToNBT(NBTTagList nbttaglist)
    {
        for(int i = 0; i < inventory.length; i++)
        {
            if(inventory[i] != null)
            {
                NBTTagCompound nbttagcompound = new NBTTagCompound();
                nbttagcompound.setByte("Slot", (byte)i);
                inventory[i].writeToNBT(nbttagcompound);
                nbttaglist.setTag(nbttagcompound);
            }
        }

        for(int j = 0; j < armorInventory.length; j++)
        {
            if(armorInventory[j] != null)
            {
                NBTTagCompound nbttagcompound1 = new NBTTagCompound();
                nbttagcompound1.setByte("Slot", (byte)(j + 100));
                armorInventory[j].writeToNBT(nbttagcompound1);
                nbttaglist.setTag(nbttagcompound1);
            }
        }

        return nbttaglist;
    }

    public void readFromNBT(NBTTagList nbttaglist)
    {
        inventory = new ItemStack[9];
        armorInventory = new ItemStack[1];
        for(int i = 0; i < nbttaglist.tagCount(); i++)
        {
            NBTTagCompound nbttagcompound = (NBTTagCompound)nbttaglist.tagAt(i);
            int j = nbttagcompound.getByte("Slot") & 0xff;
            ItemStack itemstack = new ItemStack(nbttagcompound);
            if(itemstack.getItem() == null)
            {
                continue;
            }
            if(j >= 0 && j < inventory.length)
            {
                inventory[j] = itemstack;
            }
            if(j >= 100 && j < armorInventory.length + 100)
            {
                armorInventory[j - 100] = itemstack;
            }
        }

    }

    public int getSizeInventory()
    {
        return inventory.length + 1;
    }

    public ItemStack getStackInSlot(int i)
    {
        ItemStack aitemstack[] = inventory;
        if(i >= aitemstack.length)
        {
            i -= aitemstack.length;
            aitemstack = armorInventory;
        }
        return aitemstack[i];
    }

    public String getInvName()
    {
        return "Inventory";
    }

    public int getInventoryStackLimit()
    {
        return 64;
    }

    public void onInventoryChanged()
    {
        inventoryChanged = true;
    }

    public boolean canInteractWith(EntityPlayer entityplayer)
    {
        if(ent.isDead)
        {
            return false;
        } else
        {
            return entityplayer.getDistanceSqToEntity(ent) <= 64D;
        }
    }



    public boolean func_28018_c(ItemStack itemstack)
    {
        for(int i = 0; i < armorInventory.length; i++)
        {
            if(armorInventory[i] != null && armorInventory[i].isStackEqual(itemstack))
            {
                return true;
            }
        }

        for(int j = 0; j < inventory.length; j++)
        {
            if(inventory[j] != null && inventory[j].isStackEqual(itemstack))
            {
                return true;
            }
        }

        return false;
    }

    public void dropAllItems()
    {
        for(int i = 0; i < inventory.length; i++)
        {
            if(inventory[i] != null)
            {
                ent.entityDropItem(inventory[i], 0.0F);
                inventory[i] = null;
            }
        }


    }

    public ItemStack inventory[];
    public ItemStack armorInventory[];
    public EntitySomething ent;
    public boolean inventoryChanged;
}

So in this one you MUST change the entity with yours or your entity will give an error. I used my EntitySomething here but you must change it with EntityCat and so on.

You also need SomethingContainer code:

// Decompiled by Jad v1.5.8g. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) braces deadcode 

package net.minecraft.src;

import java.util.List;

// Referenced classes of package net.minecraft.src:
//            Container, IInventory, CJB_DogSlotArmor, Slot, 
//            ItemStack, EntityPlayer

public class SomethingContainer extends Container
{

    public SomethingContainer(IInventory iinventory, IInventory iinventory1)
    {
        doginventory = iinventory1;
        for(int i = 0; i < 1; i++)
        {
            //addSlot(new CJB_DogSlotArmor(this, doginventory, doginventory.getSizeInventory() - 1 - i, 8, 8 + i * 18));
        }

        for(int j = 0; j < 3; j++)
        {
            for(int i1 = 0; i1 < 3; i1++)
            {
                addSlot(new Slot(doginventory, i1 + j * 3, 62 + i1 * 18, 17 + j * 18));
            }

        }

        for(int k = 0; k < 3; k++)
        {
            for(int j1 = 0; j1 < 9; j1++)
            {
                addSlot(new Slot(iinventory, j1 + k * 9 + 9, 8 + j1 * 18, 84 + k * 18));
            }

        }

        for(int l = 0; l < 9; l++)
        {
            addSlot(new Slot(iinventory, l, 8 + l * 18, 142));
        }

    }

    public boolean isUsableByPlayer(EntityPlayer entityplayer)
    {
        return doginventory.canInteractWith(entityplayer);
    }

    public ItemStack getStackInSlot(int i)
    {
        ItemStack itemstack = null;
        Slot slot = (Slot)slots.get(i);
        if(slot != null && slot.getHasStack())
        {
            ItemStack itemstack1 = slot.getStack();
            itemstack = itemstack1.copy();
            if(i >= 10 && i < 46)
            {
                func_28125_a(itemstack1, 1, 10, false);
            } else
            {
                func_28125_a(itemstack1, 10, 46, false);
            }
            if(itemstack1.stackSize == 0)
            {
                slot.putStack(null);
            } else
            {
                slot.onSlotChanged();
            }
            if(itemstack1.stackSize != itemstack.stackSize)
            {
                slot.onPickupFromSlot(itemstack1);
            } else
            {
                return null;
            }
        }
        return itemstack;
    }

    private IInventory doginventory;
}

After you are done with these, you should have an inventory pop up when you right click that Entity with a bone(you can edit). Also the entity will drop all of the items in its inventory upon death. Simple but can be coded furthermore to a more advanced code.

Note: I wrote all these in a hurry, sorry. I didn't have much time while writing these so there might be something wrong.

UPDATE 7/NOV/2011

PLEASE NOTE:
I have begun work on my 1.8.1 tutorials. I will no longer be visiting this thread
new thread:
http://www.minecraftforum.net/topic/683263-inlanoches-tutorials-18-modloader/

Ok, wanting to get save/load working, I backed up my work, then I cleaned out my MCP, and since I was doing that, I added AudioMod and DataSaver Class, as well. I also updated my MCP, and now I'm getting some of the errors others are getting.
If you to are getting these errors, it should be an easy fix. Usually it's a method call/variable name that was previously undetermined by MCP. After updating, this unknow is most likely know. Just go back to the super class (and follow the chain till you find it) and find what the new name is.

I'm guessing this would be considered an intermediate tutorial, since not many people seem to be posting how to do this. There are a few things that you will need:
1. ModLoader (a must)
2. Eclipse (inLanoche says USE ECLIPSE)
3. Techne (or a great visualization of 3 dimensional box art)

First things first. I posted else where about things I have been finding out about building mobs. I will use some of that here, and I may migrate my (continuing) findings here after this tutorial. I may also do a vid tut for those that don't want to read.

To start, I would start a new mod. Do as you will, but I say learn first, implement after. Once you understand this, it's pretty easy to do more of the basic stuff. Now to the tutorial. Please refrain from posting till I post the end of this tutorial. There are 4 Java files that need to be worked on, so I will do each one in a seperate post.

In using eclipse (since it is the only way I know how to do this, and it works well), know that your custom data files are stored in 2 places:
MCP\temp\bin\minecraft\
MCP\jars\bin\minecraft.jar
so if I talk about puting a file into the mob folder, know that I mean both in the MCP\temp\bin\minecraft\mob folder and in the mod folder within the jar file MCP\jars\bin\minecraft.jar

Now on to the fun...

<sorry about the organization of this growing tutorial, it's the first I have ever made>
Updates on this tutorial:

-Creation of Entity, Render and Model java files
-How to use Techne to build the model
-Creating a spawn block to spawn your model
-Breakdown on the vars and Methods for Entity, Render, and Model Java files
-Adding a GUI to your block to pick what mob to spawn
-Flying mobs
-Add a name above the mob(Render java method)
- Controllable, rideable mobs (page 8, post 160, link is not working right)
- Fixing Rotation on linked objects in your Mob
- Rayvyn shows how to do Hi-Res textures
-Super/Sub Classing tip
- Custom Animations
- Keystroke Comands and Entity Control
- Texture and Model Scaling video
- Tamable Super Class example (see post for features - WIP)
- Drivable Vehicle Mob
- Creating an on screen HUD

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