Making a addon, need Help

[nickgerrets]

Hello, I need help on making a addon.

Im making a addon for Industrial Craft 2. I have add some items, like Plutonium and some Ore's. Now i want to have the Nuclear Reactor randomly shoot out a piece of plutonium dust, i want it to be rare.

 

how do I somehow extend the Reactor to randomly emit a piece.

 

Please help me! thanks.

[gjgfuj]

you can create your own reactor, and then replace the existing IC2 reactor with it.

You can extend the original reactor if you wish as well.

 

There should be some kind of onTick method in TileEntity as well.

[nickgerrets]

I would like to extend the reactor.

 

But how to work with the TileEntity?

 

thanks.

[Mazetar]

You would have to extend and create your own version of the TE as well of course as that's the one handling the logic for it.

 

[nickgerrets]

Ehm.... How would i do that?

Does this mean i have to create a whole new Nuclear reactor and then add something?

What do  ihave to add? And how do i make the Nuclear Reactor TileEntity?

 

Some explaining code will be helpful.

 

Thanks.

[Draco18s]

You need to go learn programming in general.  Not "Java."  Programming.

[nickgerrets]

I programmed before, in multiple languages and also a !Little! bit of java. Im trying to learn java through MC but i dont fully understand everything. I have no idea how the TileEntity is working. Instead of belittling me (Draco18s), you can also just help!

 

If you know programming, why dont you say something useful?

 

Thanks.

 

 

[Mazetar]

Maybe he didn't think you knew program as basic java would be easily learnt by anyone who has mastered a different programming language.

 

TE's are just the way to store information past the 16bit limit imposed by metadata.

 

This blog should tell you about some of the inner workings of minecraft.

Especially the first parts makes a good read for trying to understand the internals of a minecraft world.

http://greyminecraftcoder.blogspot.com.au/p/list-of-topics.html

 

The javadocs are the documentation for java programs, it's more or less the same as you would expect from any other language. You can find the documentation along with the other files at the download page over here: http://files.minecraftforge.net/

 

Now for java in particular check out:

http://docs.oracle.com/javase/tutorial/

http://docs.oracle.com/javase/7/docs/api/

 

 

Now for your specific case I would read up on the java docs (if any) for the IC2 API.

Then I would read ALL the code which is included in the API.

That should give you ALL you need

 

 

[nickgerrets]

Thank you Mazetar, that is really helpful. 

[Mazetar]

Thank you Mazetar, that is really helpful. 

 

And all of it was stuff you could have googled yourself in 3 minutes

[Draco18s]

Maybe he didn't think you knew program as basic java would be easily learnt by anyone who has mastered a different programming language.

 

And not understanding keywords like "extends" is a clue that someone hasn't ever encountered Object Oriented Programming, the raw basics of which are necessary to understand how Minecraft works.  It's not really possible to learn that through exploring the existing code, because the code assumes you know what inheritance is and how it works.

 

And I'm not going to spend my time explaining those fundamental concepts via forum posts.

[nickgerrets]

I know what inheritance is and i know what extends means. Only i find Java a bit difficult, i understand a big part of it. Its like Minecraft uses a very difficult and advanced way of programming.

 

Also, I still cant figure out how to extend or implement the Nuclear reactor. I also dont know how to "dispens" a item out of it RANDOMLY. I also looked in the dispenser classes, but that didnt help much. Maybe someone has made addons for IC2 before, and is willing to explain some things to me, that would realy help.

 

Thanks.

[ss7]

Hello,

 

I can show you the code of the chest to dispense it items when it breaks, maybe that helps you a little bit.

 

 

Random random = new Random();

	TileEntity tileentity = par1World.getBlockTileEntity(par2, par3, par4);

	if ((tileentity instanceof IInventory) == false)
	{
		return;
	}

	IInventory inventory = (IInventory)tileentity;

	for (int i = 0; i < inventory.getSizeInventory(); i++)
        {
            ItemStack item = inventory.getStackInSlot(i);

            if (item != null)
            {
                float rx = random.nextFloat() * 0.8F + 0.1F;
                float ry = random.nextFloat() * 0.8F + 0.1F;
                
                EntityItem entityitem;

                for (float rz = random.nextFloat() * 0.8F + 0.1F; item.stackSize > 0; par1World.spawnEntityInWorld(entityitem))
                {
                    int stacksize = random.nextInt(21) + 10;

                    if (stacksize > item.stackSize)
                    {
                        stacksize = item.stackSize;
                    }

                    item.stackSize -= stacksize;
                    entityitem = new EntityItem(par1World, (double)((float)par2 + rx), (double)((float)par3 + ry), (double)((float)par4 + rz), new ItemStack(item.itemID, stacksize, item.getItemDamage()));
                    float factor = 0.05F;
                    entityitem.motionX = (double)((float)random.nextGaussian() * factor);
                    entityitem.motionY = (double)((float)random.nextGaussian() * factor + 0.2F);
                    entityitem.motionZ = (double)((float)random.nextGaussian() * factor);

                    if (item.hasTagCompound())
    		        {
    		        	entityitem.getEntityItem().setTagCompound((NBTTagCompound)item.getTagCompound().copy());
    		        }
                }
            }
        }

 

 

ss7

[Draco18s]

You don't need anything the vanilla Dispenser does.  You're trying to use the verb "dispense" and apply it to the context of a block.  Which is getting you confused.

 

You want a block, which works like the nuclear reactor in IC2, that at random, creates an item and does something with it: ejects it into the world as an entity or puts it into its own inventory, or something.

 

That's your goal.

 

Step 1:

Import the IC2 API.

Hopefully this gives you the nuclear reactor itself, it probably won't.

 

Step 2:

Create a new class that Extends TileEntity, call it whatever you want.

 

Step 3:

Give it behaviors.  If you have access to the original reactor block and TE, you will extend those and simply add a handful of lines to the updateTick method by overriding it.  Namely, call super.updateTick(...) and then do what you need to do in order to create a this new item (which is instanciated as a new ItemStack, as item classes themselves are singletons).

If you don't have access to the original, you'll have to duplicate everything that it does (good luck) or learn Reflections.

[nickgerrets]

The API has a few classes in the package "ic2.api.reactor", but i dont think it is the reactor block itself. I cant make the reactor block myself, because i have no idea how to do that. I dont know if i can extend one of the 3 classes in the reactor package.

 

Thanks.

[jarrett]

I think he's asking whether you can:

 

[*]Extend the reactor tile entity class

[*]Cause your subclass to be instantiated instead of the reactor base class, in all cases where Minecraft would normall instantiate it. Crafting, on chunk load, etc..

 

I wish I could answer that. I've actually been wondering the same thing. I came up with the following ideas, but I don't know if they'll work. They're just hypothetical.

 

[*]Override the reactor crafting recipe so it instantiates your extended reactor.

[*]Take over the reactor's block ID. Perhaps this would solve the problem of updating reactors that existed before the addon was installed. If you're messing with the tile entity data, you'll need to be able to detect and read the original data.

[GotoLink]

Actually, how you would do things depends on how the API is made.

If the API is good, it provides events classes linked to the Nuclear Reactor, which you can subscribe to and give new results/functions.

Forge provides the event system, I hope IC2 authors were nice enough to use it.

[nickgerrets]

Still have no idea what to do. Maybe i have to go in to some more simple stuff first. If anyone wants to see the API, I will make a link for it.

 

Maybe a little explainable code would do the trick?

 

Thanks.

[Mazetar]

Maybe a little explainable code would do the trick?

If you do know programming in some other language then you should have NO TROUBLE getting into the API's code and understanding the code. Especially considering that you are able to do google search for comparisons between Java and your mastered language.

 

As I said above, if you are unable to figure out what you need from the above links, then it's back to school for you. You will need to study the Java basics and master it before trying this!

 

Still have no idea what to do. Maybe i have to go in to some more simple stuff first.

That and do some studying