Add event to unlock new recipes in recipe book. + grouping in recipe book.

[Crare1]

Is there a way to make modded item's recipes unlocked in the recipe book by for example picking up crafting material for the given item?

Let's say I pick up an iron ingot and it would unlock a new recipe of modded item.

 

Also is there a way to group modded items in that recipe book? Currently, my recipes just show in the misc-tab(tab with lava bucket and apple).

I would like to move tool items under tools-tab(tab with axe and sword).

 

I'm modding for 1.15.2.

Edited March 11, 2020 by Crare1

[Crare1]

Ok I figured it out.

 

Subscribe to ItemPickupEvent and unlock players recipe based on whatever item they picked up.

 

@SubscribeEvent    
public void onItemPickup(ItemPickupEvent event) {
  Item item = event.getStack().getItem();
  if (item.isIn(Items.INGOTS_IRON)) {
    PlayerEntity player = event.getPlayer();
    ResourceLocation[] recipes = new ResourceLocation[1];
    recipes[0] = new ResourceLocation("your_mod_id:mod_item_id");
    player.unlockRecipes(recipes);
  }
}

Please do correct me if this is the wrong way to do it. It works though. I did refactor player events to their own class to handle with, but this is basically what it does in its simplest form.

Edited March 11, 2020 by Crare1
item.equals() changed to item.isIn() because it's comparing to a tag.

[Draco18s]

Use advancements instead.

https://minecraft.gamepedia.com/Advancements

[Crare1]

8 minutes ago, Draco18s said:

Use advancements instead.

https://minecraft.gamepedia.com/Advancements

That would actually work in this case better with iron ingots, because you can get them in many ways. I look into it. Thanks!

 

This is then again another way to do it for custom stuff, that doesn't have advancements.

Edited March 11, 2020 by Crare1

[Draco18s]

Here's a couple of examples.

https://github.com/Draco18s/ReasonableRealism/tree/1.14.4/src/main/resources/data/expindustry/advancements/recipes

You can set up your own conditions as well, I just don't have any ready examples.

[Crare1]

24 minutes ago, Draco18s said:

Here's a couple of examples.

https://github.com/Draco18s/ReasonableRealism/tree/1.14.4/src/main/resources/data/expindustry/advancements/recipes

You can set up your own conditions as well, I just don't have any ready examples.

Thanks Draco!

Now, do you have to add something else to make this work? Because this didn't work:

I added this json under src/main/resources/data/modid/advancements/recipes

Is my tag written correctly or is it something else for iron ingots?

{
  "parent": "minecraft:recipes/root",
  "requirements": [
    [
      "has_item",
      "has_the_recipe"
    ]
  ],
  "criteria": {
    "has_item": {
      "trigger": "minecraft:inventory_changed",
      "conditions": {
        "items": [
          {
            "tag": "minecraft:ingots/iron"
          }
        ]
      }
    },
    "has_the_recipe": {
      "trigger": "minecraft:recipe_unlocked",
      "conditions": {
        "recipe": "modid:mod_item"
      }
    }
  },
  "rewards": {
    "recipes": [
      "modid:mod_item"
    ]
  }
}

 

[Crare1]

okay it's "forge:ingots/iron"
https://mcforge.readthedocs.io/en/latest/utilities/tags/

[Draco18s]

4 hours ago, Crare1 said:

"tag": "minecraft:ingots/iron"

This is not an existent tag.

There is forge:ingots/iron though.

[Crare1]

@Draco18s

Still haven't figured out how to do that grouping in recipe book. Or is it even possible?

I know people are probably going to use JEI with other mods usually, but it would be nice to group the items in recipe book somehow at least for lighter vanilla like mods.

[Draco18s]

I know bugger all about recipe book groupings.