custom_roleplay_data

A datapack that allows you to easily change the CustomModelData of items to change the look of items using resource packs.

Description

This datapack allows users to trigger changing the custom model of an item held in their hand. This has undergone a major rework to support changes in datapack v61 (for 1.21.4) which not only changes how resourcepacks have to be formatted, but also supports changing custom models with a name (as opposed to number). This leads us to the following conditions:

• Resource Pack Version 42 or less (1.21.3 or less) and Data Pack version 57 or less (1.21.3 or less): Resource packs must reference custom models by integers.
  • The command would be "/trigger CustomModelData set #" and might require a number of levels (default 1 but configurable)
• Resource Pack Version 46 (1.21.4) supporting models referenced by numbers and Data Pack version 61 (1.21.4): Resource packs must reference custom models by range_dispatch and threshholds
  • The command would be "/trigger CustomModelData set #" and might require a number of levels (default 1 but configurable)
• Resource Pack Version 46 (1.21.4) supporting models referenced by strings and Data Pack version 61 (1.21.4): Resource packs must reference custom models by select and string
  • The item should be renamed in an anvil to the exact string that references the model
  • The command would be "/trigger CustomModelName" and does not require levels other than those needed to rename the item

To support this, the following examples are meant to assist in formatting resource packs:

• Resource Pack Version 42 (1.21.3) or less (in assets/minecraft/models/item/carved_pumpkin.json)

{
  "parent": "minecraft:block/carved_pumpkin",
  "overrides": [
    { "predicate": {"custom_model_data": 1}, "model": "item/pinball_helmet" },
    { "predicate": {"custom_model_data": 2}, "model": "item/pinball_helmet_2" },
    ...
    { "predicate": {"custom_model_data": 3}, "model": "item/pinball_scale" }
  ]
}

• Resource Pack Version 61 (1.21.4) using numbers/floats (in assets/minecraft/models/item/carved_pumpkin.json)

{
  "model": {
    "type": "range_dispatch",
    "property": "custom_model_data",
    "fallback": {
      "type": "model",
      "model": "block/carved_pumpkin"
    },
    "index": 0,
    "entries": [
      { "threshold": 1, "model": { "type": "model", "model": "teh3l3m3nts:item/pinball_helmet" } },
      { "threshold": 2, "model": { "type": "model", "model": "teh3l3m3nts:item/pinball_helmet_2" } },
      ...
      { "threshold": 3, "model": { "type": "model", "model": "teh3l3m3nts:item/pinball_scale" } }
    ]
  }
}

• Resource Pack Version 61 (1.21.4) using strings/names (in assets/minecraft/models/item/carved_pumpkin.json)

{
  "model": {
    "type": "select",
    "property": "custom_model_data",
    "fallback": {
      "type": "model",
      "model": "block/carved_pumpkin"
    },
    "cases": [
      { "when": "pinball_helmet", "model": { "type": "model", "model": "teh3l3m3nts:item/pinball_helmet" } },
      { "when": "pinball_helmet_2", "model": { "type": "model", "model": "teh3l3m3nts:item/pinball_helmet_2" } },
      ...
      { "when": "pinball_scale", "model": { "type": "model", "model": "teh3l3m3nts:item/pinball_scale" } }
    ]
  }
}

Demo/Testing Resource Pack

I have provided a sample resource pack to show how the commands work and how to format resource packs across different versions. There are the following 3 custom models:

• For minecraft 1.21.3 and earlier, there is a custom model for a carved pumpkin "CRD Test 1" available with command "/trigger CustomModelData set 1"
• For minecraft 1.21.4, there is a custom model for a carved pumpkin "CRD Test 2" where the model is referenced with strings, using "select", available after renaming the item "test2" and running the command "/trigger CustomModelName"
• For minecraft 1.21.4, there is a custom model for a dirt block "CRD Test 3" where the model is referenced with numbers, available with command "/trigger CustomModelData set 3"