how to edit vanilla armor protection values? | latcord | Page 1

sand raven Sep 13, 2024, 5:19 PM

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hello am new to KubeJS and coding in JavaScript. is there a way to edit vanilla armor protection values with this mod?

lavish kettleBOT Sep 13, 2024, 5:19 PM

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Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

plain bear Mar 17, 2025, 5:58 AM

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For visibility, (took me a lot of searching and pain) this snippet in startup_scripts (using overrideComponent) modifies the armor value of the leather cap to 2 instead of 1. Modify the "amount" to whatever value you want. The "id" must be either "minecraft:armor.boots", "minecraft:armor.leggings", "minecraft:armor.helmet", "minecraft:armor.chestplate" so that the bonuses do not overwrite each other. Be sure to change "feet" into "chest", "legs" or "head" depending on the corresponding bodypart (at the end) so that the bonuses apply at those corresponding locations only:

ItemEvents.modification(event => {
  event.modify('minecraft:leather_helmet', item => {
  let itemAttributeModifier = $ItemAttributeModifiers.builder().add("generic.armor", { amount: 2, id: "minecraft:armor.boots", operation: "add_value" }, "feet").build()
    item.overrideComponent("attribute_modifiers", itemAttributeModifier)
  })
})

However, this process currently completely overwrites the whole "minecraft:attribute_modifiers" list, so if you want to keep armor toughness and netherite's knockback resistance, you'll have to add ".add()"s before the ".build()" containing the corresponding information. As to how those are handled, you can search the "netherite_boots" entry in the following json and look at "minecraft:attribute_modifiers": https://github.com/misode/mcmeta/blob/summary/item_components/data.json

plain bear Mar 17, 2025, 1:35 PM

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Update: you don't need to manually copy all other modifiers if you just want to modify any number of them! This code modifies the attack damage of a hoe, but it could be used for the armor as above

event.modify("minecraft:wooden_hoe", item => {
    let modifiedAttributeModifiers = Item.of(item.item().id).attributeModifiers.withModifierAdded("generic.attack_damage", { amount: 9, id: "minecraft:base_attack_damage", operation: "add_value" }, "mainhand")
    item.overrideComponent("attribute_modifiers", modifiedAttributeModifiers)
  })

rose fossil Mar 28, 2025, 12:23 PM

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Hi, I'm trying to modify the Knockback resistance value of an armor set. I think I could use Radeau's script above for that and tried it, but I get an error...

📎 startup.log 📎 main.js

next epochBOT Mar 28, 2025, 12:23 PM

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Paste version of startup.log, main.js from @rose fossil

plain bear Mar 28, 2025, 1:59 PM

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rose fossil Hi, I'm trying to modify the Knockback resistance value of an armor set. I think...

Huh, funny. I ran only the code for the hoe and it worked as expected, but then I noticed that our kjs versions are different. I upped my version to 181 and it gave me the same error as you. Idk what's going on there, but the safest bet would be to lower your kubejs version. Mine is 119 for reference

daring stag Mar 28, 2025, 8:03 PM

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same issue here. maybe the method got deprecated after 2101 release. 119 runs on 2100
i have yet to find a solution, and honestly i don't think i care enough to search for one. the documentation is pretty lackluster or maybe i'm not looking in the right spots. methods available for item are:
setBurnTime; setMaxDamage; setCraftingRemainder; setDamage; patch; setFireResistant; setFireworkExplosion; setBaseColor; item; resetComponents; setProfile; setNoteBlockSound; setTier; setPotionContents; setLore; setGlintOverride; getCustomData; setMaxStackSize; setPotionId; setTool; setUnit; get; setLockCode; set; getCustomName; setAdditionalTooltipHidden; setAttributeModifiersWithTooltip; equals; setMapItemColor; toString; setInstrument; setUnbreakableWithTooltip; setItemName; setCustomName; setCustomModelData; setRepairCost; setBlockEntityData; setBucketEntityData; getComponentMap; setBlockStateProperties; setFood; setUnbreakable; setCustomData; setBundleContents; setDyedColorWithTooltip; setContainerLootTable; setDyedColor; disableRepair; setFireworks; setRarity; remove; hashCode; getComponentString; setEntityData; setAttributeModifiers; setTooltipHidden; setNameKey; setChargedProjectiles
no idea about the parameters. i'm "guessing" with error messages atm

rose fossil Mar 28, 2025, 8:04 PM

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Right, unfortunately version 119 correspond to minecraft 1.21 and I'm working on a 1.21.1 modpack. The earliest KubeJS version avalaible for 1.21.1 is 131 and I still get the same error...
I guess I'll have to find another solution

rose fossil Mar 28, 2025, 8:08 PM

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daring stag same issue here. maybe the method got deprecated after 2101 release. 119 runs on...

I think setAttributeModifiers is the method we're looking for?

daring stag Mar 28, 2025, 8:09 PM

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tried before, but honestly javascript/ java is not my expertise

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getting incorrect assignments / parameters

rose fossil Mar 28, 2025, 8:10 PM

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Yeah, I'm pretty new to this as well

daring stag Mar 28, 2025, 8:11 PM

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this was the error btw:

Cannot convert dev.latvian.mods.rhino.NativeJavaObject@390f166c to net.minecraft.world.item.component.ItemAttributeModifiers$Entry

daring stag Mar 28, 2025, 8:30 PM

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https://github.com/KubeJS-Mods/KubeJS/blob/main/src/main/java/dev/latvian/mods/kubejs/item/ItemModificationKubeEvent.java

@Override
@HideFromJS
public <T> ComponentFunctions kjs$override(DataComponentType<T> type, @Nullable T value) {
  item.kjs$overrideComponent(type, value);
  return this;
}

does not look like they want us to keep using this

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that's intentional because of internal issues. so be it. i couldn't find another way using kubejs and will stop looking now. like i said i don't care enough atm
i know it's just a free minecraft mod, but holy shit this is actually getting to me

plain bear Mar 29, 2025, 3:12 AM

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rose fossil Right, unfortunately version 119 correspond to minecraft 1.21 and I'm working on...

I am using 119 for 1.21.1 for the record. I'm trying stuff with sinytra connector, and it's been the only recent version that doesn't catapult a lot of fabric mods for me (aka cause a crash) bigbrain

rose fossil Mar 29, 2025, 6:47 PM

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Alright, I installed version 119 manually in my modpack and your code works perfectly 🙂
I tried it on an armor piece and it sorta works? It didn't remove the previous modifier for some reason... (see the screen shot)

📎 warden_armor_knockback.js

next epochBOT Mar 29, 2025, 6:47 PM

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Paste version of warden_armor_knockback.js from @rose fossil

rose fossil Mar 29, 2025, 7:19 PM

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Also, can I modify two modifiers on the same item?

plain bear Mar 30, 2025, 3:22 AM

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rose fossil Also, can I modify two modifiers on the same item?

Yeah, you can chain multiple .withModifierAdded like in the following script:

event.modify("minecraft:trident", item => {
    let modifiedAttributeModifiers = Item.of(item.item().id).attributeModifiers.withModifierAdded("generic.attack_damage", { amount: 11, id: "minecraft:base_attack_damage", operation: "add_value" }, "mainhand").withModifierAdded("generic.attack_speed", { amount: -2.8, id: "minecraft:base_attack_speed", operation: "add_value" }, "mainhand").withModifierAdded("player.entity_interaction_range", { amount: 1.5, id: "minecraft:base_entity_interaction_range", operation: "add_value" }, "mainhand").withModifierAdded("generic.attack_damage", { amount: 4, id: "combat-plus:offhand_damage", operation: "add_value" }, "offhand")
    item.overrideComponent("attribute_modifiers", modifiedAttributeModifiers)
  })

plain bear Mar 30, 2025, 3:30 AM

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rose fossil Alright, I installed version 119 manually in my modpack and your code works perf...

Idk what's going on there. I never touched knockback resistance, but my guess is that it's something to do with the attribute name or the id being different. Either that or knockback resistance is handled differently for black magic reasons. What I would do is to either:

Somehow log the attributes of the item you want to modify so you can maybe inspect the correct attribute name and id to confirm whether or not it's an id mismatch or black magic
Tear down all attributes and apply them manually yourself like I did with my armors here:

//Helper function to modify the armor value of an armor item
function modifyArmorValue(event, value, armorId, slot){
  let itemAttributeModifier = $ItemAttributeModifiers.builder().add("generic.armor", { amount: value, id: armorId, operation: "add_value" }, slot).add("generic.armor_toughness", { amount: 0, id: armorId, operation: "add_value" }, slot)
  event.overrideComponent("attribute_modifiers", itemAttributeModifier.build())
}

(Basically my first script)

rose fossil Mar 30, 2025, 3:01 PM

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You were right! It was an id mismatch! Thanks

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For reference this is my corrected code :

ItemEvents.modification(event => {
  let kr = 0.2; // Knockback Resistance value
  let armorSet = [
    "deeperdarker:warden_helmet",
    "deeperdarker:warden_chestplate",
    "deeperdarker:warden_leggings",
    "deeperdarker:warden_boots"
  ];
  let armorIDs = [
    "minecraft:armor.helmet",
    "minecraft:armor.chestplate",
    "minecraft:armor.leggings",
    "minecraft:armor.boots"
  ];
  let armorSlots = [
    "head",
    "chest",
    "legs",
    "feet"
  ];

  // Loop through each armor piece and modify its attributes
  for (let i = 0; i < armorSet.length; i++) {
    event.modify(armorSet[i], item => {
      let modifiedAttributeModifiers = Item.of(item.item().id).attributeModifiers.withModifierAdded(
        "generic.knockback_resistance", { amount: kr, id: armorIDs[i], operation: "add_value" }, armorSlots[i]
      )
      item.overrideComponent("attribute_modifiers", modifiedAttributeModifiers)
  })}
});

rose fossil Mar 30, 2025, 3:21 PM

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Thank you for the help @plain bear !

twin agate Apr 23, 2025, 4:16 PM

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I found this thread looking at how to modify a helmet added by a mod, and with some digging, I found out a way to do this on the latest KubeJS for 1.21.1 where overrideComponent() has been removed. Instead you have setAttributeModifiers() and setAttributeModifiersWithTooltip() which take an array of ItemAttributeModifiers.Entry. So you can take the approach done earlier, but call modifiers() on the modified attributes to get the Entry array to pass back. In my case, I wanted to make an item actually have armor and integrate with another mod because of how I modified the recipe to be more expensive.

Here I use setAttributesWithTooltip() so that they show up in the tooltip UI. If you use setAttributes() by itself, the affect is still applied when equipped, but the tooltip will not include the attributes.

Hopefully this helps save time for the next person trying to do something like this.

  event.modify('mizs_broom:witch_hat_helmet', item => {
    // Create the updated set of modifiers 
    let modifiedAttributeModifiers = Item.of(item.item().id).attributeModifiers
      .withModifierAdded(
        "generic.armor", 
        { amount: 1, id: "minecraft:armor.helmet", operation: "add_value" }, 
        "head"
      )
      .withModifierAdded(
        "irons_spellbooks:max_mana", 
        { amount: 25, id: "irons_spellbooks:head_max_mana_modifier", operation: "add_value" },
        "head"
      )
    // Apply them to the item. 
    item.setAttributeModifiersWithTooltip(modifiedAttributeModifiers.modifiers())
  })

rancid wing May 6, 2025, 11:35 PM

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sending a message here so i can come back thank you !

#how to edit vanilla armor protection values?