[1.14.4] Anvil Crushing mechanic + Custom Data JSON structure

[Simon_kungen]

Hi

 

I got really intrigued by Panda4994's video about making Sand renewable fitting into the style of vanilla:

Spoiler

 

 

 

 

So I was thinking of trying to make a mod out of that (or in this case a part of my ever-growing mod) idea as a feature of Anvils. (tl;dr Anvils landing on blocks can damage the block it lands on turning it into a different block. Cobblestone -> Gravel -> Sand, Stone Bricks -> Cracked Stone Bricks, etc. Blocks such as glass gets destroyed completely)

 

But I'm having a bit of an issue finding a way of detecting an Anvil landing. As I couldn't find an event of that I tried the next best way, looking for an event fired when an Entity is removed (FallingBlockEntity). But that does not exist either, but there is a construction event for Entities and the CapabilityAttach with Entities event.

I can find new falling Entities, but I can't detect them turning back into blocks. My new idea is to maybe use a Capability attached to falling Anvils, but I don't know how to proceed from there. I need to check if it's is going to land on a block while keeping it as a FallingBlockEntity and decide if it can destroy the block or not, and otherwise do the block conversion check when it lands and turn back into a block and at the same time do the block it landed into its conversion type (ex. Gravel -> Sand).

 

 

For now, the mechanic is the most important, so the conversion types are most likely be hard-coded for the time being. But later on I would like to have it be configured with the use of JSON files, example:

data/<namespace>/block_conversion/anvil/cracked_stone_brick.json

{
  "replace": false,
  "values": [
    "minecraft:stone_bricks"
  ],
  "replacing" : "minecraft:cracked_stone_bricks"
}

 

It would follow the ordinary tag JSON format but have an additional parameter ("replacing") what the matching block will turn into. Not sure how I would go about that part, but as I said, that is a lower priority right now, so it is most likely going to be the discussion in this thread later.

[Simon_kungen]

So, it seems like this thread died right when it was born. So let me reformulate: Read custom Json files in the data/ directory and do stuff with that. Does Minecraft have a static function to read the Json files and get the values inside that?

[Choonster]

8 minutes ago, Simon_kungen said:

So, it seems like this thread died right when it was born. So let me reformulate: Read custom Json files in the data/ directory and do stuff with that. Does Minecraft have a static function to read the Json files and get the values inside that?

 

It looks like Vanilla extends JsonReloadListener for recipes (RecipeManager), advancements (AdvancementManager) and loot tables (LootTableManager).

[Draco18s]

Having messed with it recently (could weeks ago), have my results:

https://github.com/Draco18s/MinecraftForge/blob/Global-Loot-Funcs/src/main/java/net/minecraftforge/common/loot/LootModifierManager.java#L36

 

Note that the MinecraftServer instance needs to know about your JsonReloadListener.

https://github.com/Draco18s/MinecraftForge/blob/Global-Loot-Funcs/patches/minecraft/net/minecraft/server/MinecraftServer.java.patch#L24