Sunday, January 15, 2017

Simple Coins v.1.0.0 - Release

Minecraft Forum Page - Curse Mods Page

So all in all: this project was an exercise of my ability on using Google. Only two times did I need to ask questions on the Minecraft Forum. I started off by following a guide by _Bedrock_Miner_ but then diverged from it and started to do what I wanted to do, looking up guides, tutorials, code on GitHub, asking questions on the Minecraft Forge Forum.

Of course, I didn't make any extraordinary mod that added 100x more content to the game. What amazed me the most is how easy it is to add extra content to the game, especially items and blocks. Modding for Minecraft is a good project to exercise your Java and Googling skills. I'd recommend giving it a go.

Friday, January 13, 2017

Simple Coins 0.5.2 Build - PriceInfo

So I figured out how to add trades the result in multiple items in ListItemsForEmeralds. PriceInfo needs to contain negative numbers in the constructor. So if I want to spend 1 emerald for 20 to 25 coins, I would type new PriceInfo(-20,-25). Don't agree with the way to set up this type of trade, but I'll roll with it.

Simple Coins 0.5.1 Build - Mobs drop coins now; New Villager; Forge Trading Methods

Simple Coins Curse Page

  • Emeralds cannot be converted to coins properly. This trade option has been removed for the time being. That means this trade is what is left:
  • At Tier 1:
    • 21-27 Iron Coins -> 1 Emerald
    • 24-30 Gold Coins -> 1 Emerald
  • At Tier 2:
    • 21-27 Iron Coins -> 1 Emerald
    • 24-30 Gold Coins -> 1 Emerald
  • Added new type of Villager: Banker. Banker wears a light blue robe.
  • At Tier 1:
    • 21-27 Iron Coins <-> 1 Emerald
    • 24-30 Gold Coins <-> 1 Emerald
  • At Tier 2:
    • 21-27 Iron Coins -> 1 Emerald
    • 24-30 Gold Coins -> 1 Emerald
    • 38-50 Iron Coins <- 2 Emeralds
    • 24-30 Gold Coins <- 2 Emeralds
  • 3 Nuggets are required for 1 coin.
  • 1 coin back crafts to 3 nuggets.
  • Fixed a crafting bug that would not waste nuggets and not give you a coin.
0.4.0 - Coins added to mob drops.
  • Zombies, ZombiePigmen, Husks, and ZombieVillagers have a 20% chance of
  • dropping 4 iron coins, and a 10% chance of dropping 4 coins.
  • Evokers, Vindicators and Villagers all drop 0-3 iron coins and 0-3 gold
  • coins
  • Updated to Forge

Adding Mob Drops

GitHub for this section - Go to "0.4.0 - Coins added to mob drops"

Adding mob drops was relatively easy. I made a class called EventHandlerCommon and wrote a method called onEntityDrop(LivingDropsEvent event){...}. Within the method, I initialized two Entity variables. The first one is to check in the if statements whether the mob is a certain type. For example, if I wanted to check if the mob killed was a zombie, the code would be:
if(entity instanceof EntityZombie){...}
I had two of these if statements. The first was to check if the mob killed was a zombie, zombie villager, husk, or zombie pigman. And using Math.Random() < 0.20, there would be a 20% chance 4 iron coins would drop from any of these mobs.
The second if statement would get a random number between 0-3 to drop that amount of iron coins, then again for gold coins. This would apply for villagers, evokers, and vindicators since they're all types of villagers that can use the coins as currency.

Adding a new Villager 

GitHub for this section

I initialized a VillagerProfession then a VillagerCareer. It's important to initialize the VillagerCareer with the profession in the constructor. Then I created two ITradeList[], with the appropriate possible trades (code in GitHub is self-explanatory). The first piece of the class EmeraldForItems is the item itself. The second piece is the PriceInfo which just sets the minimum and maximum amount of items it would take to receive 1 emerald. 
Afterward, I set up a static void method called initialize. Within the method, it adds the adds the trades to VillagerCareer variable I had set up earlier. The first variable is just the tier the trades appear. The second variable is the ITradeList[] itself. Lastly, the profession is registered in VillagerRegistry.instance().register(professionIsHere).

Unfortunately, I have come across an issue I'm not sure of. I want to be able to trade 1 emerald with a stack of coins. Yet, every time I create a trade (ListItemForEmeralds) and include the ItemStack, the result is a trade where you receive 1 coin instead. I commented out this trade for now.

Wednesday, January 11, 2017

Simple Coins 0.3.1 Build - Curse Page

Simple Coins Curse Page

Build 0.3.1 of Simple Coins doesn't fix any un/known bugs, it only updates the mod to Forge

I released the mod on Curse. From now on any issues should be reported there all download links will be there.

Simple Coins 0.3.0 Build for Minecraft 1.11.2 - Persistence is key

Simple Coins 0.3.0 Download

Quite a few changes. Firstly the Mint block. The crafting recipe has been changed.

In order to make coins, the mint is now required to craft the coins. The crafting recipes for the coins have been removed. Just right click the mint block, and place the nuggets as so:

The coins can also be crafted back to nuggets.



Man, this piece of the build took a while to finish. Firstly was just getting the GUI to correctly work. It kept crashing at first because I assigned nulls to ItemStack variables or methods and that was the deprecated way to do it. Forge now requires ItemStack.EMPTY to be used.

Next issue was getting the custom slots to behave correctly. For some reason, the custom slots would just not let me take the item in the slot unless the cursor was already holding another ItemStack. After doing looking on GitHub as to what other modders' did. I changed the assign of the custom slots, I created an InventoryCrafting variable along with an IInventory variable that would assign to MintCraftResult - A class that extends InventoryCraftResult but returns false every time isItemValidForSlot is called.

This fixed all issues of clicking on the custom slots. But then my next issue was the input doubling when the amount was greater than 1. There was something occurring with the slotClick method, so I had to override it, and super.slotClick and ensure the after crafting, the input would decrease by 1 no matter what.

It took me 3 days to implement a Mint Block that actually works. More experienced modders can probably do this in less than a few hours. There were times when I wanted to give up. But I didn't. Even if I felt like I couldn't figure something out, I just kept going. And sometimes the answer won't come to you when you're working on it. It's good to take a break sometimes. This is all cliche-sounding but there is truth to this.

I'm unsure where I want to take this mod in the future, I thinking of making villagers be able to trade with coins instead of emeralds.

Tuesday, January 10, 2017

Mint GUI Implemented - Simple Coins 0.3.0 Build Delayed

So I've managed to go through and figure out a few issues I've had with ItemStacks. After fixing the overridden onBlockActivated method, I was met by an error that caused the game to crash from the server side. It was a NullPointerException, in which ItemStack.areItemStacksEqual(...) was trying to compare two ItemStacks. After some research online, I couldn't find any solutions, so I brought up the question on the Minecraft Forge forum in the modder support forum. In summary, I had to change any instance of
ItemStack var = null; -> ItemStack var = ItemStack.EMPTY;
ItemStack[] inventory -> NonNullList<ItemStack> inventory;
Afterwords, I was able to right click and bring up a GUI. After some changing of integer values, I was able to the size the GUI to the correct size and bring the slots to their correct places on the GUI. But now an issue I'm present with is removing an item from the two item slots when the cursor is not holding a stack of items.

I also still need to add crafting to the mint. I added a check in the Update() method for the block's TileEntity file so if an iron ingot or gold ingot is in the input slot, it sets 4 coins of iron or gold in the output slot.

GitHub of the Mod

Hopefully, I can get finish Mint block once and for all by tonight.

Monday, January 9, 2017

onBlockActivated() - Not wanting to be Overriden

I solved the issue of onBlockActivated(...) not being accepted by @Override. So I first checked all the variables within onBlockActivated and the tutorial I was using to make sure they were similar. After some thinking I decided to use super.onBlockActivated(...), highlighted the super constructor in Eclipse and it told me the missing variables.

It's always the most stupid issues I get stuck on.

But I had another issue with implementing TileEntity. Immediately tried to extend my existing MintBlock class with BlockContainer instead of Block. However this led to the block being invisible in game. Rather then extend BlockContainer, I extended Block (like originally) and implement ITileEntityProvider.

I still need to add additional GUI classes but I should be able to get Version 0.3.0 Build released today. If you're following these same tutorials hopefully this helps you if you've had similar issues.

Sunday, January 8, 2017

Simple Coins 0.2.0 Build - Frustrations with GUI Creation

Simple Coins 0.20 Build Download

First Release of the Mod for Minecraft 1.11.2. Jar file goes in .minecraft/mod folder. You will need Forge Version 1.11.2-
 Adds two items and one block.
  • Iron Coin

  • Gold Coin
  • Mint

The two coins serve no special purpose but to enhance the Vanilla trading experience in Minecraft, more specifically in multiplayer. It provides more options to use as currency. You can also craft back to an iron or gold ingot by putting 4 coins (of the same variant) into a 2x2 square.
The mint has no purpose as of now. In the future, the mint will have the ability to make 4 coins out of 1 ingot. 

So throughout the entire day and last half of yesterday, I tried to add the GUI interface and functionality of the mint block through two ways. First, I tried to add it through the use of Containers and Interfaces without use TileEntity. But after some headbanging for a few hours, I tried to patch up what I had and include TileEntity. But unfortunately, this still did not work. I feel like the root of my issue is with the onBlockActivated() method. I included System.out.println("Right Click!") in the method to see if it's even detecting the right click but it is not. I feel like the issue is that the method does not want to take in "@Override" but needs it in order for it to work properly. For reference, I used this tutorial by Jabelar on building a block with a GUI interface. I'm going to rebuild the block from the ground up and release the next featured-build ( 0.3.0 ) with a working mint.

If there any problems you have with this build please comment below with your system specs and log file. I prefer you use GitHub or Google Drive.

Saturday, January 7, 2017


So this is where it starts. I'm making a dev blog just so I can look back and see what I was working on in the past, reminiscing, etc. Not only that, but I hope some of my struggles I encounter here can be used by others who want to get started in programming in Java, Minecraft mods, or whatever I'm working on that can be of use of others.

Currently, I'm working on a mod called Simple Coins. It's simple, it adds iron and gold coins (maybe more in the future) with an associated crafting recipe. This mod is intended to be used in multiplayer settings where it can provide a more "Vanilla" role-playing trading experience with other players. While Emeralds are already the de-facto currency with villagers, it's slightly difficult to come by if you don't have a village nearby or you're not interested in collecting materials to trade with them.

Maybe in the future, I can include the coins as a way of trading with the villagers but that'll be later down the line and I feel like I would have to modify some of the game's code to do that (which I'm not sure can be done in Forge). But I'll be documenting my findings as I go along.