Creative Tab Modifiers

Creative Tab Modifiers

This feature allows you to edit the content of a creative tab. This inclues:

• Adding new items (at a certain position)
• Removing existing items
• Changing icon (WIP)
• Adding a new tab (WIP)
• Removing a tab entirely (WIP)

Getting Started

To start you'll need to create a .json file in your resource pack folder in assets/[tab namespace]/polytone/creative_tab_modifiers/[tab name].json.

For example if you want to modify minecraft:combat you can do so with a file located in assets/minecraft/polytone/biome_effects/combat.json

Explicit targeting

Alternatively, if you want to manually specify your targets you can place this json in assets/[your pack namespace]/polytone/creative_tab_modifiers/[some name].json (Any path will work but this is recommended to avoid overwriting Implicit defined targets).

Then you can add the targets field to the json containing a list of valid Dimension ids as follows:

{
   "targets": ["minecraft:combat", "minecraft:building_blocks"]
}

Json Structure

Here are all the parameters that you can include in your modifier. All fields are optional

field	explanation
icon	An ItemStack. Will modify the tab icon (NYI)
removals	A list of Item Predicates (see below) that will determine which items to remove
additions	A list of Item Additions (see below) that will determing which items to add
targets	A list of IDS to use for explicit targeting

Here's an example of how a basic modifier could look

{
  "removals": [
    {
      "type": "tag_match",
      "tag": "swords"
    }
  ],
  "additions": [
    {
      "items": "minecraft:diamond"
    }
  ]
}

Removals

The removals block contains a list of Item Predicate objects.

Each predicate is essentially a Tester that returns True or False when queried with an item. These are used to determine WHICH item to target (in this case remove)

Each Item Predicate has the following syntax:

field	explanation
type	The type of the predicate
[value]	The value(s) of the predicate. Each predicate type has its own and are listed below

Here's a list of all the types you can use:

predicate name	value(s)	explanation
or	predicates. A list of Item Predicates objects	Returns true if just one of its predicates is true
all	predicates. A list of Item Predicates objects	Returns true if all of its predicates are true
not	predicate. A single predicate object	Returns true if that predicate is false
tag_match	tag. An item tag	Returns true if an item belongs to that tag
items_match	items. A list of Items	Returns true if an item is contained in that list
itemstack_match	itemstack. An ItemStack (using vanilla syntax)	Returns true if an item matches the entire itemstack, this include its nbt
id_match	namespace, path. Two Regular Expression strings. Only one is required	Returns true if the item ID's namespace and path both match those regular expressions

Here's an example defining a predicate that targets all items that do NOT contain "block" in their name:

{
  "type": "not",
  "predicate": {
    "type": "id_match",
    "path": "block"
  }
}

Additions

The additions block contains a list of Item Addition objects. The purpose of each of these is to determine WHICH items to add and WHERE to add it to.

An Item Addition object has the following syntax:

field	explanation
items	A or a single of either an Item or an Itemstack to be added to the Tab
before	Optional, Boolean. Wether to add these items before or after the items targeted by predicate
predicate	Optional. An Item Predicate (explained above). Determines before or after which item these items will be added

As you can see the Item Predicate object from before was reused here. Check it out above.

If predicate is left out, the items will be added at the end of the tab.

Here's an example of some items added after the Iron Axe item

{
  "items": [
     "iron_shovel",
     "iron_sword"
  ],
  "before": false,
  "predicate": {
    "type": "item_match",
    "items": [
      "minecraft:iron_axe"
    ]
  }
}