help-development

[thorn isle]

i can write it in python and have it perform better if i optimize for performance

[vagrant stratus]

^ You'd have to rewrite the client's entity system to be ECS and compare that to pure vanilla to get a proper comparison and not two completely different implementations lol

[fallow saffron]

They do try to optimize for performance, the issue is there are AFAIK 2m+ lines of code in their engine, it's very difficult to refactor and optimize

[thorn isle]

they go for low hanging fruit here and there

do you remember the 1.15 "performance update"?

[vagrant stratus]

which is irrelevant to using ECS or not using ECS

[thorn isle]

they put a tick rate limit on villager ai -- that's their performance update

[vagrant stratus]

It'd be a fuck ton of LOC regardless lmao

[fallow saffron]

SoA ECS allows the CPU to use 1 cycle to compute multiple data (basically like SIMD)

[thorn isle]

don't need ecs for that

[fallow saffron]

OOP takes 50-80 cycles

[thorn isle]

not strictly true

i say this having rewritten the collision algorithm (yes, in oop) using simd

[fallow saffron]

With the latest version of java?

[thorn isle]

which btw is a much more noticeable performance issue than whatever memory locality of bubble columns

i think j16, i don't remember, it's been a while

[fallow saffron]

Java 16 doesn't have SIMD support I think?

[thorn isle]

it was a bit ass because the jit is so fragile, but you can get it to emit vectorized instructions

not explicit simd support, no

[fallow saffron]

you can't tell it to use AVX for example

[thorn isle]

but it's been in jit for a long time

[vagrant stratus]

Speaking of ECS. Debating of if i want to use the over bloated flecs or roll my own solution that isn't so feature bloated 🤔

[fallow saffron]

ENTT is good I hear

C++?

[thorn isle]

e.g. simple for-loops with predictable bounds have been vectorized since i think j11

[fallow saffron]

Yes but they must not have any branching

if the cpu has to throw the work it did

[thorn isle]

myes, not a problem for collisions however

[fallow saffron]

I suppose with AABB

but traditional is an issue

[thorn isle]

you can algorithm yourself out of almost any hole

[vagrant stratus]

entt is also bloat lol

[fallow saffron]

Then I'm not sure, just look it up

[vagrant stratus]

I'll just roll my own solution kekw

[fallow saffron]

Yeah most of the time you don't need most of it

[thorn isle]

i rolled my own ecs system for a custom block type system a while back

and being the type purist i am, i had the system/component/entity type declarations be declared through java generics

ecs is quite convenient in some cases

i didn't quite like it however, i eventually went back to rawdogging it with inheritance and a little bit of composition

only reason i tried ecs is that my blockproperty system lended itself to it quite nicely

[vagrant stratus]

Yea, a lot of my own stuff is just inheritance and comp lol

I simply don't need ECS for that stuff because i don't have any specific benefit from using it kekw

Looking at MC and what they're doing, they wouldn't really benefit from ECS either tbh

[slender elbow]

"i wrote code that mojang didn't and it ran better"

world news

[vagrant stratus]

Sniffer -> Animal -> AgeableMob -> PathfinderMob -> Mob -> LivingEntity -> Entity
This is more or less good enough for their needs tbh

[thorn isle]

lmao

[vagrant stratus]

Would ECS change this much? No, not really.
It'd be the same complexity, just different code lol

[thorn isle]

ecs excels when you have to put together various properties and behaviors onto a bunch of different mobs that isn't neatly modelable as a type hierarchy

e.g. suppose you have an aging mob that doesn't do pathfinding

[vagrant stratus]

Which they don't really do afaik

[thorn isle]

i don't think so, all the ageable mobs are livestock

something that could benefit from ecs is stuff like monsters catching fire in sunlight

[vagrant stratus]

I believe that's just a boolean and literally only used for zombies lol

[thorn isle]

but that's a very negligible portion of the codebase and is already represented as an inherited boolean

[vagrant stratus]

Which makes ECS useless kekw

ECS would benefit plugin & mod devs, but that doesn't matter as much as keeping things more or less stable and just doing what works lol

[thorn isle]

if they did a rewrite, like they did in bedrock, i could see them going with ecs, but i could also see them sticking to inheritance and composition; there aren't really many benefits to be gained on the server side at least

[vagrant stratus]

a lot of stuff just doesn't really make sense as ECS either.
Why make it possible for other mobs to do bee specific mechanics. There really isn't one

[thorn isle]

most of the things that'd really benefit from ecs are already composed out of Entity itself into MovementController and Pathfinder and similar like Brain

beyond those two, mobs are mostly just state definition and one-off logic

[vagrant stratus]

pretty much, yea. not seeing anything major that would benefit more from ECS than the current impl

[thorn isle]

perhaps blocks, they are already sorta ecs-like with their block properties

which is why i tried ecs for my block system

[vagrant stratus]

AI goals do a good chunk of stuff, but those are already easy to deal with lol

[thorn isle]

i'm not too familiar with brain internals, i see them as very inefficient, perhaps ecs might help within them

[vagrant stratus]

    @Override
    protected void registerGoals() {
        this.friendsGoal = new SilverfishWakeUpFriendsGoal(this);
        this.goalSelector.addGoal(1, new FloatGoal(this));
        this.goalSelector.addGoal(1, new ClimbOnTopOfPowderSnowGoal(this, this.level()));
        this.goalSelector.addGoal(3, this.friendsGoal);
        this.goalSelector.addGoal(4, new MeleeAttackGoal(this, 1.0, false));
        this.goalSelector.addGoal(5, new SilverfishMergeWithStoneGoal(this));
        this.targetSelector.addGoal(1, new HurtByTargetGoal(this, (Class<?>[])new Class[0]).setAlertOthers((Class<?>[])new Class[0]));
        this.targetSelector.addGoal(2, new NearestAttackableTargetGoal<Object>(this, Player.class, true));
    }

Silverfish, for example

Just clear goalSelector & targetSelector and add your own goal(s) to the specific mob

[thorn isle]

if you squint at it and turn your head sideways it's basically already ecs

[vagrant stratus]

Yea, but it works so it's not worth rewriting to be proper ECS lol

Maybe for a from-scratch game, but even then ehhh? It works and it's simple to use

extend Goal implement the relevant methods, add to goal selector

good enough, i'd say lol

[subtle oriole]

Is there a way to check if a player is online-mode in Bungeecord, without kicking that player?

[vagrant stratus]

I'd probably just do the same thing myself unless there's a better method that's actually objectively better lol

[thorn isle]

check if their client sends an uuidv4 (not a guarantee of online mode, tlauncher also sends a v4), then query the mojang api with the name or uuid and see if it matches what the client sent

it doesn't tell you whether it's actually that user and is not a login, but it's a very strong indicator that the connecting user is at least trying to log in as that mojang user

so at that point you should be safe to trigger the onlinemode auth process for them

[vagrant stratus]

maybe I'll use AI to come up with an AI impl, see what it comes up with kekw

[subtle oriole]

Would tlauncher send a v4 UUID that really match a Mojang UUID?

or would it be a random v4

[thorn isle]

no, it'll send some random ass mangled uuidv4 used in their skin system or something equivalently stupid

so checking it against the uuid you get from mojang is an almost surefire check

[vagrant stratus]

Either way means it's not a guarantee

[subtle oriole]

so from the v4 uuid check mojang api if anything matches then okay of not then count it offline?

without even using the online-mode check?

[thorn isle]

myes, but you must also do the online mode check if you think it is an online mode user, i.e. if the name+uuid matches what you get from the mojang api

because nothing stops a client from sending that name+uuid

it's just that most launchers choose not to

[vagrant stratus]

well AI picked.... something for the AI impl

[subtle oriole]

why check online-mode if we already checked the mojang api to see if they match?

[vagrant stratus]

it's certainly something

[subtle oriole]

I guess it can never match the fake v4 uuid with the mojang api

[thorn isle]

because any launcher could send the name+uuid, without really being that player

you still want to confirm it's the actual logged-in user

[subtle oriole]

but won't it be random v4?

[thorn isle]

it will if it wants to

but i can write a launcher that sends the real uuid

[subtle oriole]

oh

[thorn isle]

and if you don't double-check with the auth system, i will just forcelogin myself into your server

[vagrant stratus]

You have 0 guarantees on the legitimacy outside of praying the client plays nice and does what it's supposed to do lol

[thorn isle]

myes, the auth against mojang part is the only guarantee you get

all of this is just to avoid doing that if the player is in offline mode

[subtle oriole]

so in case it's v3 it will be %100 offline
if v4 check for online-mode

[thorn isle]

in other words, trust (name+uuid matches) but verify (auth against mojang)

if v4 AND matches the uuid you get from mojang

tlauncher sends a v4 uuid that doesn't match the mojang uuid

[vagrant stratus]

Oh yea, thoughts on whatever tf AI came up with here for a game AI impl? @thorn isle

It works... i guess? Seems overkill though

[thorn isle]

looks basic but might work

i'd have to fiddle with it to know for sure

[vagrant stratus]

 Node attack = new Sequence()
                .add(new Condition(ctx -> ctx.get("enemyVisible")))
                .add(new Action(ctx -> {
                    System.out.println("Attacking enemy");
                    return Status.SUCCESS;
                }));

        Node heal = new Sequence()
                .add(new Condition(ctx -> ctx.get("health") < 50))
                .add(new Action(ctx -> {
                    System.out.println("Healing");
                    return Status.SUCCESS;
                }));

This is basically how it works lol

        AIAgent agent = new AIAgent(buildAI());

        agent.getContext().set("health", 30);
        agent.getContext().set("enemyVisible", true);

        agent.update();

buildAI() being the above code blocks

[thorn isle]

i would like typed properties for eg. enemyVisible however

magic strings is not nice

[subtle oriole]

thank you
I was trying for hours to find a way :9

[vagrant stratus]

lol one moment I'll see what the AI comes up with

[subtle oriole]

I hope there are no more such of manipulation issues from client side :0

[thorn isle]

pretty sure fastlogin already does all of this btw

[subtle oriole]

I guess it does using /premium, so I don't even think to check for uuid version

[vagrant stratus]

fuck i need to re-do this with a clear chatgpt instance.

either way it's certainly leaning towards data-driven AI lol

[thorn isle]

i think they do advertise some kind of auto detection, but i've never used it so i don't know for sure

[thorn isle]

take a look at uh

what the fuck was it called again, i always forget

https://github.com/MineDojo/Voyager

it's in javascript, but the "skill library" is a pretty good model of ai goals

but they use a llm to decide which goals to start/stop

and the goals themselves are written by the llm, so it can "learn" or invent new behaviors as needed

[vagrant stratus]

i don't hate myself enough to go through that lol

[thorn isle]

this is basically what i intend to do with your botcreator thing, except in java because javascript is for plebeians

[vagrant stratus]

Different person for that specifically kekw

[thorn isle]

who was that other guy

[vagrant stratus]

I'd probably just do what minecraft's doing though.
I don't need a goal system that's LLM friendly, but human friendly lol

[thorn isle]

myes

[vagrant stratus]

i took one look at the json file and noped out KEKW

[thorn isle]

if you un-escape it so it has newlines and shit it becomes much more legible

[vagrant stratus]

lot of effort just to see the code kekw

[thorn isle]

{"mineWoodLog": {"code": "async function mineWoodLog(bot) {
  const woodLogNames = ["oak_log", "birch_log", "spruce_log", "jungle_log", "acacia_log", "dark_oak_log", "mangrove_log"];

  // Find a wood log block
  const woodLogBlock = await exploreUntil(bot, new Vec3(1, 0, 1), 60, () => {
    return bot.findBlock({
      matching: block => woodLogNames.includes(block.name),
      maxDistance: 32
    });
  });
  if (!woodLogBlock) {
    bot.chat("Could not find a wood log.");
    return;
  }

  // Mine the wood log block
  await mineBlock(bot, woodLogBlock.name, 1);
  bot.chat("Wood log mined.");
}", "description": "async function mineWoodLog(bot) {
    // The function is about mining a single wood log block. It searches for a wood log block by exploring the environment until it finds one of the seven types of wood logs. If a wood log block is found, it is mined and a success message is sent. If no wood log block is found, a failure message is sent.
}"}

javascript nested in json, because yes

[vagrant stratus]

Ah yea. That's sane, but not exactly what I'd want or need lol

[thorn isle]

it's mostly to make it llm friendly

or well programmatic friendly

[vagrant stratus]

fuck the LLM

it just needs to get good

[thorn isle]

what i want to do is not use javascript but java, and hook into the bukkit api

so it can use the built in pathfinders and such

[vagrant stratus]

Attempt #2 and it gave more or less what MC is already doing lol

[thorn isle]

i also ended up modeling my ai goal system after the mc goals system for my npc plugin, but that was mostly because it was the only system i was familiar with

[vagrant stratus]

tbf i can't think of anything that's much better

It's basically ECS, so switching fully to ECS doesn't really change anything

[vagrant stratus]

This, I guess

if cleaned up anyways

but even then that's only somewhat better, but i think (?) would allow more complexity than MC?

[thorn isle]

sorta bootleg ecs yeah, you have your entity type which has components (magic strings in a hashmap 🤡 ) and "systems" in the conditions and actions working on each entity of that type

just without any of the benefits of ecs really

[fallow saffron]

i see what assumption you have about ecs, true ecs only uses primitives, not objects, and a singleton per component, where the component has pre-allocated arrays, this is why the cpu can do the work faster, it only needs 1-5 cycles because it is all contiguous and sitting in the l1 or l2 cache

[vagrant stratus]

Oh wait. I got another (maybe better) impl out of GPT

[fallow saffron]

You need to understand how the cpu works

[vagrant stratus]

relevant bit is only

GameWorld world = new GameWorld();

        Enemy goblin = new Enemy("Goblin", 0, 0);
        Enemy orc = new Enemy("Orc", 5, 5);

        // Behavior tree: flee if threat near, otherwise patrol
        SequenceNode fleeSequence = new SequenceNode();
        fleeSequence.addChild(new IsThreatNearNode(2));
        fleeSequence.addChild(new FleeFromNode(goblin));

        SelectorNode root = new SelectorNode();
        root.addChild(fleeSequence);
        root.addChild(new RepeatNode(new MoveToNode(5,5))); // patrol to (5,5) endlessly

        orc.setBehaviorTree(root);

        world.addEntity(goblin);
        world.addEntity(orc);

        for (int i = 0; i < 10; i++) {
            System.out.println("=== Tick " + i + " ===");
            world.update();
        }

[thorn isle]

this is an implementation detail, and while it does have effects on performance, we aren't talking about performance, but fluency

it is completely irrelevant here whether anything is in arrays or hashmaps or a sql database here

[vagrant stratus]

The sequence & selector node thing is p nice imo

[fallow saffron]

i suppose thats why you had the idea that it doesn't provide significant performance improvements, if you use it like that its still just oop written a bit differently

[thorn isle]

not at all

we know what ecs is, trust me

i've written it in the "backed by contiguous arrays" approach before

[fallow saffron]

yes did you create a component class and then have an object as a fielx?

field*

[thorn isle]

but we're not talking about performance here

we're talking about how fluent it is in source code

[vagrant stratus]

I think in MC's case you'd have to have an AI goal call a different AI goal to achieve the same thing 🤔

[fallow saffron]

anyhow, you do you

[thorn isle]

i think mc just has them be stateful

[thorn isle]

no, like i said, it's backed by contiguous, dense arrays

[vagrant stratus]

I'd have to check

[thorn isle]

trust me brother you're trying to teach your father how to fuck here lmao

[buoyant viper]

wild

[vagrant stratus]

Waiting on claude, but it's slow af

[vagrant stratus]

This would nice impl though, if improved slightly w/ more node options.
Maybe a mix of this & the previous AI suggestion

[vagrant stratus]

.

[thorn isle]

i did something sort of similar for a quest plugin before

[vagrant stratus]

GPT's more or less defaulted to some form of MC-like GOAP AI so i guess it's just a matter of impl if that was what i'd go w/

Claude is uh.. more or less doing the same thing

 * AIAgent guard = AIAgent.builder("Guard")
 *     .withBehavior(BehaviorTree.sequence(
 *         Conditions.enemyInRange(8.0),
 *         Actions.chase(),
 *         Actions.attack()
 *     ))
 *     .build();

[thorn isle]

to be fair there's probably considerable bias towards minecraft source code in the java source sample set

[vagrant stratus]

Yea, I'll let this one finish up & try C++ lol

stupidly simple prompt too though, as i don't want to influence the AI massively

yea, even that's doing the same thing. so i guess it's either good enough in general, or GPT just likes it lmfao

just a matter of impl i guess lol

Claude's certainly running with the prompt lol

bruh fucking thing made tic-tac-toe

even went through all the free messages, the fuck

[thorn isle]

i just use openai with my own harness, i don't like any of the public harnesses like claude code

[vagrant stratus]

am broke lol

if I could I'd use a good local one, but i don't have the hardware

[thorn isle]

minimax m2.5 is pretty cheap and its numbers look pretty good

but it's chinese so expect the CCP to steal everything in your workspace

[vagrant stratus]

Yea, going through a few more attempts and I'd probably just do exactly what MC's doing lol

ai/
  core/
    AiContext.java
    NodeStatus.java
    TickResult.java
    Clock.java
  memory/
    Memory.java
    MemoryEntry.java
    InMemoryBlackboard.java
    MemoryKey.java
  events/
    AiEvent.java
    EventBus.java
    DamageTakenEvent.java
    TargetLostEvent.java
  sensing/
    Sensor.java
    SensorSuite.java
  actions/
    AiAction.java
    ActionRegistry.java
    ActionResult.java
    decorators/
      CooldownAction.java
      TimeoutAction.java
      RetryAction.java
      InterruptibleAction.java
  utility/
    Consideration.java
    UtilityCurve.java
    UtilityOption.java
    UtilityReasoner.java
    UtilityDebugSnapshot.java
  goap/
    WorldState.java
    Goal.java
    GoapAction.java
    GoapPlanner.java
    Plan.java
    GoapAgent.java
  brain/
    AiController.java
    Activity.java
    ActivityPolicy.java
    InterruptPolicy.java
    ReplanPolicy.java
game/
  NpcContext.java
  NpcSensors.java
  NpcActions.java
  NpcGoals.java
  DemoGameLoop.java

intervening got me this mess though

which is uh

yea

[thorn isle]

like they say about premature optimization, premature abstraction is also a risk

[vagrant stratus]

Yea, I have exactly 0 idea wtf it was thinking but we run with it lol

[eager hawk]

Does anyone know why this happens? I'm working on a Hide and Seek plugin, if I stand still for 3 seconds my disguise should go invisible and a real block should be placed. But 9 out of 10 times it like bugs out and no block is being placed: https://medal.tv/games/minecraft/clips/mnqCbR5V6dwP-i3M_?invite=cr-MSx4OHosMTk4OTMwNTE5

I'm sending my code 1s

BlockDisguise: https://pastebin.com/C6zpY5it

[thorn isle]

what is "this"

[eager hawk]

I'm working on a Hide and Seek plugin, if I stand still for 3 seconds my disguise should go invisible and a real block should be placed

But 9 out of 10 times it like bugs out

And no block is being placed

DisguiseManager: https://pastebin.com/ChVXja2w

https://pastebin.com/4Z2fFvKw

These are the most important classes I think

Thanks for helping ! <3

[thorn isle]

we probably also need the BlockDisguise class since that's the one that has the impl for checkForStillness

i also don't see you calling the startTask method anywhere

[eager hawk]

It's over here

[eager hawk]

package me.vuxaer.hideandseek;

import me.vuxaer.hideandseek.listener.DamageListener;
import me.vuxaer.hideandseek.listener.JoinListener;
import me.vuxaer.hideandseek.listener.MoveListener;
import me.vuxaer.hideandseek.listener.QuitListener;
import me.vuxaer.hideandseek.manager.DisguiseManager;
import me.vuxaer.hideandseek.manager.GameManager;
import me.vuxaer.hideandseek.manager.PlayerManager;
import org.bukkit.plugin.java.JavaPlugin;

public final class HideAndSeekPlugin extends JavaPlugin {

    private static HideAndSeekPlugin instance;
    private GameManager gameManager;
    private PlayerManager playerManager;
    private DisguiseManager disguiseManager;

    @Override
    public void onEnable() {
        instance = this;

        playerManager = new PlayerManager();
        gameManager = new GameManager(playerManager);
        disguiseManager = new DisguiseManager();

        getServer().getPluginManager().registerEvents(new JoinListener(), this);
        getServer().getPluginManager().registerEvents(new QuitListener(), this);
        getServer().getPluginManager().registerEvents(new MoveListener(), this);
        getServer().getPluginManager().registerEvents(new DamageListener(), this);

        disguiseManager.startTask();
    }

    public static HideAndSeekPlugin getInstance() {
        return instance;
    }

    public GameManager getGameManager() {
        return gameManager;
    }

    public PlayerManager getPlayerManager() {
        return playerManager;
    }

    public DisguiseManager getDisguiseManager() {
        return disguiseManager;
    }
}

The task is started in here

[smoky anchor]

how do you prevent the block moving the player ?

I don't think you do
you place block, the block moves the player, player moved and the block is then removed

[eager hawk]

Hmmm that might be the issue indeed!

[thorn isle]

it does look like the block is being set, and the camera moves

and then the block disappears

[eager hawk]

How could I prevent that from happening?

[thorn isle]

i suppose you could mount the player on an armor stand so they're immobile and have to press sneak to dismount

it'd also prevent you from accidentally undisguising by moving slightly

alternatively spectator mode so they don't collide with the block in the first place, but that can get hairy

[eager hawk]

Hmm yeah, ur right

I'll try to figure out a way

Thanks yall!

[vagrant stratus]

    private static boolean blocksMotion(Block block) {
        Material mat = block.getType();
        return mat.isSolid() && mat.isOccluding() && mat != Material.COBWEB && mat != Material.BAMBOO_SAPLING;
    }

Any idea if Spigot already has this exact thing? If not I'll just keep it lol
I'm bumping some NMS stuff up to a public api kekw

[lilac dagger]

    <repositories>
        <repository>
            <id>jitpack.io</id>
            <url>https://jitpack.io</url>
        </repository>
    </repositories>

    <dependency>
        <groupId>com.github.fr33styler.botcreator</groupId>
        <artifactId>bot-creator-api</artifactId>
        <version>v2.0.0</version>
    </dependency>

I released it, I might adjust some things tho @orchid gazelle @thorn isle
https://github.com/Fr33styler/BotCreator

[thorn isle]

right you're the bot guy

very nice

[lilac dagger]

it's still very basic

[vagrant stratus]

This already uses spigot API, but neither Material or Block have this specific thing afaik

[lilac dagger]

i might adjust some packages around

but functionality wise it works fine

[thorn isle]

something that'd be useful for my le embodied agent is maybe world storage, as in receiving chunk packets and storing the sections in memory

but since i'll package it into a plugin anyway, i'll probably just use bukkit for world access

[lilac dagger]

You can just read the chunks

It's an extra packet

[young knoll]

Isn’t there isPassable or something

[vagrant stratus]

maybe 🤔
I'll have to double check to see how close it is to the NMS functionality if that's the case

that's just collision shape. I'm not entirely sure that 1:1's the functionality

huh neither CraftBlockState or CraftBlock call the relevant method

Does anything in the API make BlockBehavior accessible 🤔

Acually it's BlockBehavior -> BlockStateBase

       @Deprecated
        public boolean blocksMotion() {
            final Block block = this.getBlock();
            return block != Blocks.COBWEB && block != Blocks.BAMBOO_SAPLING && this.isSolid();
        }
        

Just realized it's deprecated. TF is replacing it then?!

and why are enderman still using it?!

        final boolean flag = blockstate.blocksMotion();
        final boolean flag2 = blockstate.getFluidState().is(FluidTags.WATER);
        if (flag && !flag2) {

https://tenor.com/view/wtf-is-this-john-malkovich-what-the-hell-what-is-going-on-gif-15731558

why does LivingEntity#randomTeleport take a PlayerTeleportEvent but isn't public API

wtf bruh

rioting

[umbral ridge]

https://giphy.com/gifs/iTrendz-itrendz-trading-family-SyZe3PoqD1TCnXZklA

[umbral ridge]

because they are black

[thorn isle]

lmao

[thorn isle]

it's a bit more involved than that, since the chunks contain palette id's

[lilac dagger]

yeah i know

it depends what you want to do with those chunks

[thorn isle]

anything, basically

but like i mentioned i will probably end up just using the bukkit api for world state access, as the bot would be packaged in a plugin

it'll be a fit fucked if there are other plugins sending per-player blocks or entities, but for 90% of cases it'll be good enough

for integration testing specifically, however, we do want at least clientside inventory support

the most productive use case i see for this is bundling it into the test runtime of a plugin and running it with runPaper so predictable integration tests can run on what the client sees

step the server tick by tick, assert client state, send client actions, assert server state, rinse and repeat

mockbukkit is pathetic and useless for any realistic testing

[lilac dagger]

okay, let me minify netty

[rough sonnet]

just run a client on the same jvm

[lilac dagger]

12mb with it shaded

i managed to get it down to 1.5 mb

[rough sonnet]

why do you need to do that?

[thorn isle]

idk if you can; the server has many static facilities, so the client might as well

[rough sonnet]

can't use a different classloader?

[quaint basin]

https://imgur.com/a/9GA4n2z

I have an i5-13500 CPU with 6 efficient cores and 8 performance cores. I have 3 servers: proxy, SMP, and Box1. I'm thinking of doing something like taskset -c 0,2,4 java -jar ... for SMP; then 6, 8, 10 for Box1; then 1, 3, 5 for Velocity. And as I get more players, I'll create Box2, Box3, Box4, etc., which will occupy cores 7, 8, 10, then 11, 13, 15, and so on. From what I've seen, cores 0-11 are the performance cores, where the odd cores from 0 to 11 are hyperthreaded, meaning they are slower than the even cores from 0 to 11. That's why I only use them for Velocity and for the other Box servers as needed. Am I doing this right, or should I let Linux manage this for me and simply use java -jar ... for everything?

I'm even considering using efficient cores instead of performance cores for Velocity, Box2, Box3, etc., because it seems that if the P-Cores are heavily overloaded, their corresponding hyperthreads become worse than an E-Core, and I think that will be the normal case since it's a minecraft server running on a P-Core
I'm saying this based on artificial intelligence, so if anyone with knowledge in this area could give recommendations, I would be grateful

[chrome beacon]

Just let Linux manage it

[solid heart]

Why is the material for repeaters DIODE instead of REDSTONE_REPEATER?

hmmm idk how to do inline code

[thorn isle]

Use two backticks instead of 3

[worldly ingot]

It hasn't been DIODE since it was changed in 1.13, 8 years ago

[vagrant stratus]

kekw

[solid heart]

Why was it before that?

[worldly ingot]

That was what Bukkit developers decided to call it when it was added

[wet breach]

pretty sure that is what mojang called it o.O

[worldly ingot]

That may also be the case

[solid heart]

hm interesting

[worldly ingot]

Some items were named differently. Reeds (sugar cane), watch (clock)

Spades instead of shovels I think too

[wet breach]

now what bukkit did do was had a habit of not updating names for stuff lol

and kept old names

[chrome beacon]

Yeah Mojang called it Diode for a while

[lilac dagger]

same with shovel and spade

[wet breach]

so bukkit would have classes or variables with old names and mapped them to new names except for the classes

[solid heart]

Is there any easy was of converting the Bukkit Material to the minecraft names in 1.8.8?

[chrome beacon]

XMaterial

[solid heart]

Is that an api?

[chrome beacon]

Yeah

[solid heart]

hm ok thanks

[chrome beacon]

or do you mean to display the names?

[vagrant stratus]

Speaking of spellings

    
    public int getMoistnessLevel() {
        return this.entityData.<Integer>get(Dolphin.MOISTNESS_LEVEL);
    }
    
    public void setMoisntessLevel(final int level) {
        this.entityData.<Integer>set(Dolphin.MOISTNESS_LEVEL, level);
    }
    

ha

tsk tsk tsk

[lilac dagger]

moist

[solid heart]

formatted a la "/give" command and similar

[lilac dagger]

which ide do they use?

i just autocomplete these with intellij

[vagrant stratus]

More like Moisnt

[lilac dagger]

ah wait, it's not autocompletable

[young knoll]

Did 1.8.8 even have names in /give

I thought it was still numeric ids back then

[thorn isle]

hell if i remember

[quaint basin]

they have yes

[buoyant viper]

yea

it had both iirc

until like 1.13 or whenever <the flattening> occurred

[chrome beacon]

Yeah 1.13 ^

[grave abyss]

Hi from where can i get spigot engine source code

[grave abyss]

alr got it from buildtools

[wet breach]

Now have fun customizing that engine

[wet breach]

Named ids were a thing up until 1.13 however not everything had a named id and sometimes when using magic numbers you had to use id. Also ID was popular even when named ids existed because of chat send length being more limited then what it is now and then command blocks as well.

Then mojang fixed those issues so id's are not strictly necessary but i still prefer id's

[solid heart]

Why is that? I feel like they're not good

[grave abyss]

Accually removing mob ai

[wet breach]

Because in terms of efficiency/optimizing it is better to have an array of ints than it is strings. They should have made strings purely front side of server and user configurable in terms of mapping. Back end wise it should just be ints as they are easier to manipulate and handle. Thats my opinion anyways.

Also I am great at bitmasks and bitshifting

So with ints i can take advantage of that but not with pure strings

[solid heart]

Makes sense

If what you're doing requires that level of optimization then sure, but otherwise I personally feel like the Strings are better because the ids are kinda magic numbers

[wet breach]

Sure but not all magic numbers are bad

You can't even really eliminate that completely

[solid heart]

What do you mean by this? When would a magic number be preferable to an enum?

[wet breach]

Well enums are always loaded and never go away at least not without using some kind of hack, but i suppose for this they would always be loaded anyways.

[solid heart]

Loaded as in, they are in RAM?

[wet breach]

Is there another kind?

[solid heart]

Just wasn't clear to me

I don't know much about how JVM works at a very low level like that

[wet breach]

Your class is either loaded or its not. Enums are always loaded

If its a large enum you cant like unload even partial of it

Anyways magic numbers are only bad if you dont have them documented.

Your internet runs off magic numbers

In regards to mc they were only bad because mojang would occasionally change them up lol

Not really suppose to do that lol

[solid heart]

Sure but (and this is not an area I know a lot about) isn't that partially because a lot of those protocols are very old and can't be easily changed?

[solid heart]

My personal issue with them is that it makes code hard to read, and I usually don't write documentation for code in personal projects as I usually don't share them publically

[wet breach]

They can be changed, hence custom protocols existing. The difference is that they are well documented

You can have your internal network use something other than tcp or udp

All you have to do is just tell the systems what that protocol is aka drivers

For example in the internet protocol (IP) it is typically forbidden to have 2 systems with the same IP. But nothing says you can't do it anyways.

As long as both systems dont collide on what they are listening and sending to, you can hide systems this way

[solid heart]

As in ports? Makes sense

[wet breach]

Ip addresses

[solid heart]

Yes

[wet breach]

Port sharing is already a thing and has been for decades

[solid heart]

But this is referring to different systems with the same IP, but they use different ports?

[wet breach]

Nope they can use same ports, just as long they are not listening for the same thing

[solid heart]

Would they not both get the request then?

[wet breach]

As i said port sharing is already a thing on your system. You can have multiple applications on the same port

Key is what they are looking for packet wise is not the same

[wet breach]

Sure but only one should respond

[solid heart]

So both applications would get the packets (or a third application would chose which to route them to), but only one would respond, depending on packet contents

Cool

[wet breach]

Correct

[solid heart]

Is there any reason to run more than one application on the same port?

[wet breach]

You might have a logger that you want to be kept separate from the application receiving is an example. Or lets say you run game servers but dont want to configure multiple ports you can just run them all on the same port

In terms of firewall rules its far easier to manage rules for a few ports than many of them

Maybe your isp limits what ports can be open or how many is also another good one

But point is yes the protocols are indeed old but not unchangeable. Maybe for the general public at large but only as long as they dont have the driver to understand your protocol though this includes routers but you can totally have a custom protocol internally and many businesses do indeed run custom protocols

But its all magic numbers. Packet id's, header lengths, data lengths, packet sizes etc. They are not strings just a bunch of numbers and bitmasks and offsets lol

So in a way i agree magic numbers can be bad, but only if you dont document what those numbers are for or what they do lol. And in regards to unreadable code, you dont have to stick with the magic numbers you could just use the mapping or make one on the fly

If mappings were configurable to begin with where a user can name the ID's as they please then it solves that issue. And in regards to clients it would just be sent as a payload like the registries already

[lilac dagger]

Packet ids in Minecraft increase automatically in the addpacket method

Which is super nice

So the devs don't have to work with magic numbers

It's automatic

[wet breach]

Well tcp does that too

But that is nice as well

But yeah there are ways to have magic numbers and also not deal with them at the same time lol

[rough sonnet]

you still have a global blockstate palette which is still referenced by every chunk

[sullen marlin]

I don't think it's global

[young knoll]

It’s not

There is a global mapping for int -> Blockstate but that’s only used for networking

[thorn isle]

The palette used by chunk sections depends on the number of different blockstates in the chunk

Linear palette is used for under 8, iirc, and a hashmap based palette until 256 or something fairly large

Larger than that and it will use the global palette

In practice however you probably will never see a section use the global palette since the threshold is so high, except perhaps in a debug world

[young knoll]

There’s also a single palette

For single blocks

An indirect palette is used for 2-256 different states

And the global palette is used past 256

[thorn isle]

public abstract class Strategy<T> {
    public static final Palette.Factory SINGLE_VALUE_PALETTE_FACTORY = SingleValuePalette::create; // Paper - Anti-Xray
    private static final Palette.Factory LINEAR_PALETTE_FACTORY = LinearPalette::create;
    private static final Palette.Factory HASHMAP_PALETTE_FACTORY = HashMapPalette::create;
    static final Configuration ZERO_BITS = new Configuration.Simple(SINGLE_VALUE_PALETTE_FACTORY, 0);
    static final Configuration ONE_BIT_LINEAR = new Configuration.Simple(LINEAR_PALETTE_FACTORY, 1);
    static final Configuration TWO_BITS_LINEAR = new Configuration.Simple(LINEAR_PALETTE_FACTORY, 2);
    static final Configuration THREE_BITS_LINEAR = new Configuration.Simple(LINEAR_PALETTE_FACTORY, 3);
    static final Configuration FOUR_BITS_LINEAR = new Configuration.Simple(LINEAR_PALETTE_FACTORY, 4);
    static final Configuration FIVE_BITS_HASHMAP = new Configuration.Simple(HASHMAP_PALETTE_FACTORY, 5);
    static final Configuration SIX_BITS_HASHMAP = new Configuration.Simple(HASHMAP_PALETTE_FACTORY, 6);
    static final Configuration SEVEN_BITS_HASHMAP = new Configuration.Simple(HASHMAP_PALETTE_FACTORY, 7);
    static final Configuration EIGHT_BITS_HASHMAP = new Configuration.Simple(HASHMAP_PALETTE_FACTORY, 8);

yeah looks like i got the linear palette threshold wrong, it's 16 and not 8

[young knoll]

I’m just going off the protocol on the wiki

It might be a bit different in memory

[thorn isle]

seems about right

                return (Configuration)(switch (bits) {
                    case 0 -> Strategy.ZERO_BITS;
                    case 1, 2, 3, 4 -> Strategy.FOUR_BITS_LINEAR;
                    case 5 -> Strategy.FIVE_BITS_HASHMAP;
                    case 6 -> Strategy.SIX_BITS_HASHMAP;
                    case 7 -> Strategy.SEVEN_BITS_HASHMAP;
                    case 8 -> Strategy.EIGHT_BITS_HASHMAP;
                    default -> new Configuration.Global(this.globalPaletteBitsInMemory, bits);
                });

[young knoll]

If you have more than 256 different block states in a single 16x16x16 area that’s pretty Wack

[thorn isle]

though it looks like it uses the 4-bit linear map for bits 1-4

[young knoll]

Yeah it doesn’t bother going below 4 bits

[thorn isle]

yeah i don't think that is going to happen unless someone really tries to make it happen

[young knoll]

Free optimization!!!!11

I’m going to make an unoptimized server fork that always uses the global palette when sending chunks >:D

[thorn isle]

you mean 1.8

or whenever palettes were even introduced

did 1.8 have palettes yet? for the longest time we just had 8 bits per block type and then an extra 8 bits of "damage value"

[young knoll]

No idea

That was back when dinosaurs still existed

[thorn isle]

i remember experimenting with per-bit-width implementations of the strategy

for them magic multiply division things

where instead of dividing by a number you multiply with a big magic number and then right shift

and since the bit width was a constant, jit was free to go ham with whatever magic number substitutions it could come up with

however there were no measurable performance gains

[covert stump]

These errors are coming up...

Ig mainly because my host is using python 3.13?

[thorn isle]

har har har python

[worldly ingot]

tf are you doing on a Minecraft server where Python is involved?

[thorn isle]

it's like skript but for "programmers"

[buoyant viper]

https://docs.python.org/3/library/audioop.html tuff, probably

[covert stump]

no for my bot

[worldly ingot]

Okay, unrelated. That makes more sense

[covert stump]

lol yeah easy

[covert stump]

oh yeah fixed ty

switched to Python 3.12

[hard turtle]

CraftArmorStand craftSeat = (CraftArmorStand) seat;
                    EntityArmorStand nmsSeat = craftSeat.getHandle();
                    nmsSeat.setGravity(false);
                    nmsSeat.setPositionRotation(newLoc.getX(), newLoc.getY(), newLoc.getZ(), newLoc.getYaw(), newLoc.getPitch());

guys

why the setGravity(false) is not working??

help pls

the armorstand keeps falling

[slender elbow]

i dont know sorry

[thorn isle]

😔

[wet breach]

try setting the gravity after setting the position or after its spawned in

[young knoll]

They already fixed it

Apparently the NMS setGravity is misnamed and should be setNoGravity

[wet breach]

ah, didn't realize it was continued in general lol

[onyx fjord]

is inventory#getholder performance better than in the past?

[thorn isle]

on paper yes, if you pass false for snapshot

on spigot it still shits bricks

[young knoll]

There’s still no need for custom holders tho

[rough sonnet]

does it matter if you check if the holder is instanceof your custom class in an inventory click event which is common? it'll still create a snapshot

[young knoll]

Yes

But holders weren’t designed to be used for identifying custom inventories

[rough sonnet]

https://giphy.com/gifs/oh-no-anyway-7k2LoEykY5i1hfeWQB

[young knoll]

I mean if you are making paper plugins and can use their no snapshot method then I guess it’s fine

Otherwise you are just making bad plugins

[eager hawk]

Hi there, I'm working on a Hide and Seek plugin. Whenever a Hider is running around, I can hit them. But as soon as they turn into a BlockDisplay, I am not able to hit the block and register a hit. I have tried so many different solutions, but nothing is really making a difference (have been trying for hours straight haha).

Is there anyone that might know a fix for this?

Here are the most important classes, if you need any other classes, feel free to let me know.
DamageListener: https://pastebin.com/f8Bjv0ZQ
BlockHitListener: https://pastebin.com/kjRhU0wW
BlockDisguise: https://pastebin.com/nGqeEwxn

Thanks for your help in advance!

[thorn isle]

i haven't looked at anything, but block displays aren't interactable

if there's no physical block there, you need an Interaction entity for an interactable hitbox

[eager hawk]

By this, do you mean the BlockDisplay should be replaced by a real block or what do you think would work?

I am working with BlockDisplays indeed.

The player is also being teleported to the blockdisplay position, ive tried looking if the location of the player matches with the location the seeker is trying to hit, but that didn't seem to work

I'm not really a fan of AI, but because I'm pretty lost I have tried asking it anyway, it told me to detect left click in air and ray trace forward, but that did not have any effect either.

[young knoll]

BlockDisplays have no hitbox

[thorn isle]

i mean keep the block display but also spawn a matching Interaction

[young knoll]

Add an interaction entity as a passenger so they actually have a hitbox

[thorn isle]

https://minecraft.wiki/w/Interaction

[eager hawk]

Oh I have never worked with that, thank you very much I will have a look!

[thorn isle]

it's basically an invisible hitbox

specifically meant to make things that normally don't have hitboxes interactable

[eager hawk]

Okay it does seem to work better now! One note: do you know why it's only triggering when I'm hitting the top of the block? If i try to hit the sides of the block it seems to have no effect, but the top does work

[thorn isle]

turn on hitboxes in the client debug and see if it matches the block display

[eager hawk]

Ah okay I can tell the hitbox does not match the block indeed! I'm gonna try to fix that right now

Thanks <3

Is there an easy way to match the hitbox with the blockdisplay ?

[thorn isle]

add a vertical translation to the transformation of the block display

and move the entity itself a bit lower

or ditch the passenger approach and teleport the interaction to the display every tick

that's generally something you want to avoid as it easily looks jittery, but since interaction entities are invisible, it doesn't matter

[eager hawk]

Ah okay I understand, it works now, I'm very happy! Thank you very much <3

[eager hawk]

Thanks to you as well! :)

[thorn isle]

👌

[smoky anchor]

@eager hawk I'm not so sure if Block Displays are great for this
They don't have the same lighting as placed blocks, they have no AO
In some cases it may be rather easy to just see the hider

(I am using perf. mods, they may alter the way the game looks here, do test this yourself)

[eager hawk]

Ah okay I did not know that, thanks for informing me! I might want to switch over to a way with normal blocks then.

[thorn isle]

didn't you have it set up so that when the player stops moving, it turns into a regular block? or was that someone else

but yes, block displays are very easy to tell apart from regular blocks if you're looking for them

[eager hawk]

Atm it turns into a BlockDisplay when the player stops moving, that's why I had to implement the Interaction part

But I might be better off switching to regular blocks then

I don't know how yet, because rn the player stands inside of the blockdisplay, but ofc that's not possible with real blocks since they will push the player out of it

Spectator mode is what comes up in my mind but the player needs to be able to move and jump as well when leaving the solid block position

[smoky anchor]

just change the players size and teleport them right on top of the newly placed block

hahah

[eager hawk]

I tried, but as a seeker if I walk over the block I push the player away and it removes the disguise

[smoky anchor]

you can disable collisions
with teams I think

[thorn isle]

Mount them on an armor stand so they have to explicitly dismount and can't accidentally get bumped or hit a key and break their disguise

[quaint basin]

https://pastes.dev/Jik2S4OhTH If the def is not null, then the getString method will necessarily return a non-null value?

[thorn isle]

yes* except maybe if the config has specifically a null value for that key, but i'm not sure if that's treated as absent

[tender shard]

no, if the path exists and contains nul, then the method might return null too (according to the docs)
hm the Contract annotation says otherwise. so either way the docs are wrong, or the annotation is wrong ah nvm then "the value" would not be "a string"

TL;DR yeah if "def" is not-null, return value is guaranteed to be not-null

I hate java

[thorn isle]

    public boolean isSet(@NotNull String path) {
        Configuration root = this.getRoot();
        if (root == null) {
            return false;
        } else if (root.options().copyDefaults()) {
            return this.contains(path);
        } else {
            return this.get(path, (Object)null) != null;
        }
    }

yeah it looks like MemorySection treats nulls as not present

[tender shard]

that whole config api of bukkit is kinda weird

[thorn isle]

yaml in general is kind of ass and bukkit wrapping it into another poorly thought out abstraction layer didn't help

[tender shard]

yeah lol

although I think YAML in general is pretty nice

[ivory sleet]

yea the config format is nice itself in the right place

[thorn isle]

it's good in some aspects and okay in others, problematic in a few

[slender elbow]

people need to get introduced to object mapping early in life

[lilac dagger]

can you show an example?

this?

sounds pretty straight forward to me

[ivory sleet]

thats an example of it

afaik object mapping is quite general where it means u have some isomorphism (one-to-one) mapping between two domains and that is to a large extent/completely structure preserving (might omit certain transient fields for example ^^)

[slender elbow]

yeah I more so mean automagic object mapping that gson jackson ktx.serial etc do

you know, that thing where you just tell gson "give me a list of this Person class"

[ivory sleet]

oooh yea

[rancid stream]

guys i need help

[sullen marlin]

?ask

[undone axle]

If you have a question, please just ask it. Don't look for staff or topic experts. Don't ask to ask or ask if people are awake or available. Just ask the question to the channel straight out, and wait patiently for a reply. Make sure you use the right channel regarding the topic of your question. Create a thread in case the channel is already in use!

[hushed spindle]

was Base64Coder removed in this latest release?

[eager hawk]

Thanks I will try that out!

[eager hawk]

Whenever the seeker tries to hit the top of a block (disguised player), it hits the player on top of it instead. It should only register block hits and somehow be able to hit through the player, because right now the invisible player is covering the top of the block. Do you have an idea how I could make that possible?

[smoky anchor]

mmm you can hide the hider from the seeker. Not sure if this method works for players.
https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/entity/Player.html#hideEntity(org.bukkit.plugin.Plugin,org.bukkit.entity.Entity)
that should make the hider intangible for the seeker and prevent some cheats that show invisible players (I assume that's how you do it now)

[misty ingot]

whats the best way to check for a specific custom structure near a specific block? (im assuming that hard coding every single coordinate for every required block relative to said block is not the best method)
context: players need to make a small structure and when they place a player's head on it, a piece of code will run and the structure will dissapear

[tender shard]

how large is that structure?

checking blocks in already loaded chunks is quick

[slender elbow]

1,000,000,000,000 blocks³

spread in a 1x1 line

[tender shard]

that seems like a structure bigger than oliver193's mom

in that case I'd use chunk snapshots

[chrome beacon]

💀

[young knoll]

I would compare it to an nbt structure loaded with the api

Makes it easy to change the structure

[thorn isle]

either that or a worldedit schematic

especially if the structure is user-defined

[worldly ingot]

Bro 💀

[quaint basin]

what's difference between EntitiesUnloadEvent and EntityRemoveFromWorldEvent ?

[thorn isle]

did we not spend like an hour talking about this just the other day

.

[tender shard]

an entity can be unloaded but still be alive - e.g. persist?

RemoveFromWorld is when it "dies" - is gone forever

[thorn isle]

the other way around

RemoveFromWorld fires when the entity stops being in a world

[tender shard]

oh my bad

[thorn isle]

due to

• being unloaded
• dying
• going to another world

[tender shard]

yeah anyway, javadocs explains it pretty well

[thorn isle]

unloaded means the chunk it is in was unloaded

[tender shard]

isnt that exactly what I said?

[thorn isle]

you said removefromworld means it's gone forever

in a certain sense unloadedevent is a subtype of removefromworldevent; unloading a mob causes it to stop being in the world

[tender shard]

RemovedFromWorld = gone
UnloadedEvent = chunk unloaded but might be back again when the chunk gets loaded again?

[thorn isle]

no

removefromworldevent also gets fired when it unloads

because it ceases to be in the world

[tender shard]

ah ok

[thorn isle]

once it loads it will appear again with an entityaddtoworldevent

[tender shard]

ok makes sense

[thorn isle]

the remove and add events are especially useful to maintain caches or lists of loaded entities that you might want to e.g. tick

since they by definition mark the start and end of a loaded entity's lifecycle

for example, i used them in villager lobotomizatornator to track lists of lobotomized and alive villagers to check periodically and to restock their trades

it's much cheaper than iterating over all entities in the world, especially when targeting mobs that are relatively rare, like villagers, or in his case "minions"

[quaint basin]

alr

thanks

[thorn isle]

this is exactly what i said last time btw

[trail flicker]

It's unfortunate that there's no way to actually save maps into map_#.dat files without them being blank. I think I would have to resort to listening EntitiesLoadEvent and then filter to ItemFrames with maps in them, then hooking up MapRenderer based on ID read from ItemFrame.
Unless there's some API library that does allow that?

[quaint basin]

I probably didn't understand or I forgot my bad

[thorn isle]

what're you trying to do

if you're trying to do image maps, several plugins for that already exist

[tender shard]

you can check how HuskSync does it, it's on github

[trail flicker]

I'm trying to save maps into map_#.dat files, so that they can persist across server restarts

[thorn isle]

for more library/api focused things, there's this https://github.com/MinceraftMC/MapEngine which is quite powerful

i don't remember if it does persistence, but it does image manipulation and protocol nonsense to spawn per-player item frames with maps at least

if you really want to actually write to the file yourself, it's pretty simple as well; it's a 2d array of 128x128 bytes, each representing a palette color

[slender elbow]

i feel like i'm having deja vus twice a week or something

[thorn isle]

however i would recommend against doing this if you're trying to do "images on maps"

as all map.dat's are stored permanently in memory

and not very efficiently at that

[trail flicker]

Bukkit/Spigot already permanently stores them in memory, as 128x128 bitmap with all pixels being transparent. Generating new maps on every restart would waste more memory, not less

[thorn isle]

yes, so my recommendation is not going through bukkit for them at all

but rather using something like MapEngine to manage them on the protocol layer

i.e. the server is not aware of your custom maps at all, and a plugin sends their data to clients on demand instead

[trail flicker]

Basically there are two states: "idle" and "active". Active does animations and stuff, bukkit API already allows that. "idle" is just an item frame with a map picture existing in the world, until right-clicked. I don't want to write protocol stuff for all random itemframes with my maps in them, vanilla behaviour is enough.

[thorn isle]

eyeballing mapengine, it doesn't seem to offer persistence

you can take a look at husksync like mfnalex suggested, or you can write to the .dat manually; the format is simple and you can grab the palette bytes directly from the bukkit canvas

[trail flicker]

Yeah, I did that for Sponge back then. But I heard that 26.1 changed the map file stuff, so it would be a brittle solution

[thorn isle]

i'm not aware of any public api or library that'd do the persistence for you, someone else might; nms is also an option

[desert rock]

public class WoodCuttingListener implements Listener {

    private final Set<UUID> activeCutters = new HashSet<>();

    public WoodCuttingListener(JavaPlugin plugin) {
        Bukkit.getScheduler().runTaskTimer(plugin, () -> {
            for (UUID uuid : new HashSet<>(activeCutters)) {
                Player player = Bukkit.getPlayer(uuid);
                if (player == null || !player.isOnline()) {
                    activeCutters.remove(uuid);
                    continue;
                }
                Block target = player.getTargetBlockExact(5);
                if (target == null || !Tag.LOGS.isTagged(target.getType())) {
                    stopCutting(player);
                    continue;
                }
                player.damage(1.0);
            }
        }, 5L, 10L);
    }

    @EventHandler
    public void onBlockDamage(BlockDamageEvent event) {
        Player player = event.getPlayer();
        if (Tag.LOGS.isTagged(event.getBlock().getType()) && !isAxe(player.getInventory().getItemInMainHand().getType())) {
            activeCutters.add(player.getUniqueId());
            updateBreakSpeed(player, 0.0);
        }
    }

    @EventHandler
    public void onBlockDamageAbort(BlockDamageAbortEvent event) {
        stopCutting(event.getPlayer());
    }

    private void stopCutting(Player player) {
        if (activeCutters.remove(player.getUniqueId())) {
            updateBreakSpeed(player, 1.0);
        }
    }

    private void updateBreakSpeed(Player player, double value) {
        AttributeInstance attribute = player.getAttribute(Attribute.BLOCK_BREAK_SPEED);
        if (attribute != null) attribute.setBaseValue(value);
    }

    private boolean isAxe(Material material) {
        return material.name().endsWith("_AXE");
    }
}``` If you hold down the LMB on the block and look at the air, then back at the block, you can break it with anything. How to fix?

[thorn isle]

does it fire the events in the order you expect?

[desert rock]

it doesn't trigger onBlockDamage because the lmb is still held down

When I look away from the block onBlockDamageAbort is triggered, but when I look back at the block onBlockDamage is not triggered

[thorn isle]

i wonder if that might be an api bug

you'd assume that if BlockDamageAbort fires when looking away, BlockDamage would fire again when looking back

i suppose you could not use the bukkit api and instead listen to whatever packet gets sent when a player starts mining a block

that's what people used to do before these events

[thorn isle]

is it being triggered by the event or your tick loop?

[desert rock]

by the event

[chrome beacon]

?services

[undone axle]

If you wish to request or offer development/art/building/administration services, please do so at https://www.spigotmc.org/forums/services-recruitment-v2.54/

[torpid halo]

ty

[spring tartan]

cam anyone help me make a simple minecraft server

[solid heart]

maybe, what do you need help with?

[wraith spade]

hey, can anyone help me with two things? firstly, I want it so it detects any player within 15 blocks, gets their loc and then puts lightning on then, and it also deals five hearts. I also want to make it so when hitting with a specific sword, it will have a 10% or so chance to give the person 3 hearts of tick damage and the person who hits them 3 hearts of "tick damage" back, if possible can you explain how/what the code means since i feel pretty bad if i just copied code especially since im asking for a lot, very new btw, thank you in advance.

[solid heart]

when you say, "any player within 15 blocks", what is the player within 15 blocks of?

also, what do you mean by "tick damage"

[wraith spade]

particularily i want it to be a trident when you left click it does 15 blocks around the player who left clicked it and when you right click 15 blocks wherever the trident lands

and tick damage like when you jump in the void

but ofc less damage but idk if thats possible

[solid heart]

So like, just damage? What do you mean by tick

[wraith spade]

yea kinda but damage over time so like every second it could t ake a heart stopping at 3

sorry if i worded that confusing

[solid heart]

Ah I see

[solid heart]

So, for detecting when a player left clicks, you're going to want to listen to PlayerInteractEvent. Then, check if the player is holding a trident, and the action was a left click. You can use getNearbyEntities and then filter for players to get a list of nearby players. To check when a trident lands, you can use ProjectileHitEvent. To strike lightning that deals an amount of damage that you choose, use getWorld.strikeLightningEffect(), and then call damage() on the right players

For the sword, you'll want to listen for EntityDamageByEntityEvent. To get a random number you can use Math.random(). To do damage over time, you can use a runnable.

[wraith spade]

thank you so much 🙏

[solid heart]

wlc! if you need me to go into more detail on anything I can.

[wraith spade]

yep, i will def try that and if i need help with a part ill ask, thank you

[fallow saffron]

It's better to check if it isnt a trident or a right click etc and return early

[wraith spade]

@EventHandler()
public void OnClick(PlayerInteractEvent event) {
if(event.getPlayer().getInventory().getItemInMainHand().getType().equals(Material.TRIDENT))
if (event.getPlayer().getInventory().getItemInMainHand().getItemMeta().getLore().contains("Lightning")) {
Player player = (Player) event.getPlayer();

            // Right Click
            if(event.getAction() == Action.RIGHT_CLICK_AIR || event.getAction() == Action.RIGHT_CLICK_BLOCK) {
                if (!list.contains(player.getName()))
                    list.add(player.getName());
                return;
            }
            // Left click
            if(event.getAction() == Action.LEFT_CLICK_AIR || event.getAction() == Action.LEFT_CLICK_BLOCK) {
                // 15  block stuff
                Location tridentleft = player.getLocation();
                for (Entity playersnear : tridentleft.getWorld().getNearbyEntities(tridentleft, 15, 15, 15)) {
                    if (playersnear instanceof Player) {
                        if (!tridentlist.contains(player.getName()))
                        tridentlist.add(player.getName());
                        if (tridentlist.contains(player.getName())) {
                            Location tridentlightning = player.getLocation();
                            tridentlightning.getWorld().strikeLightning(tridentlightning);
                            player.damage(10.0);
                        }
                    }
                }
            }

        }

}

@EventHandler
public void onLand(ProjectileHitEvent event) {
if (event.getEntityType() == EntityType.TRIDENT) {
if (event.getEntity().getShooter() instanceof Player) {
Player player = (Player) event.getEntity().getShooter();
if (list.contains(player.getName())) {
// 15 blocks around it
Location tridentthrow = event.getEntity().getLocation();
for (Entity playersnear : tridentthrow.getWorld().getNearbyEntities(tridentthrow, 15, 15, 15)) {
if (playersnear instanceof Player) {
if (!tridentlistthrow.contains(player.getName()))
tridentlistthrow.add(player.getName());
if (tridentlistthrow.contains(player.getName())) {
Location tridentlightning = player.getLocation();
tridentlightning.getWorld().strikeLightning(tridentlightning);
player.damage(10.0);
}
}
}
}
}
}
}

}

this doesnt work, ik there are prolly multipel thigns wrong but nothing obvious bcuz intellj idea hasnt picked up anything

i tried with a friend it didnt do lightning or any damage, so its probably related to the list and picking up them on it to run the lightning, if i had to guess

if there are any obvious mistakes its prolly from me copying it from idea

like really obvious ones

[fallow saffron]

What are you trying to achieve?

[wraith spade]

so bascially when you left click, it picks up on all players within 15 blocks, and strikes them with lightning and does 5 hearts. and when you right click it does the same but on where the trident ladns

lands*

[fallow saffron]

First of all you should do null checks, like if (playersnear instanceof Player) playersnear may be null, so do if (playersnear == null) continue before checking instanceof

otherwise you would flood the console with NPE's

[wraith spade]

oh yeah i should check console

[fallow saffron]

Also why do you have a list?

[wraith spade]

in console nothing c omes up

good point

[fallow saffron]

Are you using it elsewhere?

the list

[wraith spade]

not really but there could be multiple players within 15 blocks

but it probably doesnt matter

[fallow saffron]

you don't need a list, since you are looping through all nearby entities

and then checking if they are instanceof Player

it will apply it to all of them

Can I DM you? better than here

[wraith spade]

alright

[quaint basin]

https://imgur.com/a/PN2pjeF

crateId = new NamespacedKey("ExcellentCrates", "crate.id");
keyId = new NamespacedKey("ExcellentCrates", "crate_key.id")

how can I solve this?

[mortal vortex]

tells you right there

a-z not a-zA-Z

[quaint basin]

oh yea thanks

[mortal vortex]

welc gng

keep thugging big ligma

[tender shard]

reading always helps in debugging

TLDR; left part of NamespacedKey must be lowercase

probably because of Windows support, which is the only current OS in use today that can't deal with both FOLDERNAME and foldername being at the same space

[quaint basin]

I read it, but I'm stupid

[quaint basin]

what's the replacement for PlayerLoginEvent?

[umbral ridge]

Doesnt it say in description?

?whereami

[undone axle]

https://cdn.discordapp.com/attachments/864180468680360027/944415049462714469/whereami.mp4

[quaint basin]

i can't use playerjoinevent bc i need event#getHostname

[umbral ridge]

Maybe this? https://hub.spigotmc.org/javadocs/spigot/org/bukkit/event/player/AsyncPlayerPreLoginEvent.html

[quaint basin]

Why do I need Cloudflare WARP to join Minecraft servers in the newer versions?

[chrome beacon]

You don't

unless you have something on your network or isp blocking it

[quaint basin]

And why do I only need it in the newer versions? I don't need it in version 1.20

[chrome beacon]

Somethings filtering packets ig

and doesn't like the newer version

[quaint basin]

Well, I'm not the only one reporting this problem

[chrome beacon]

And everyone just happens to be running warp/vpn to fix the issue?

[buoyant viper]

this sounds very much like a not Minecraft problem lol

[quaint basin]

yes

maybe tlauncher issue. i'll see the original launcher

[desert rock]

Why doesn't setSprinting(false) work?
How can I cancel a sprint for a player?

[buoyant viper]

kill them

[chrome beacon]

setSprinting should work for stopping the current sprint

but doesn't prevent them from sprinting again

[quaint basin]

how can I disable the redstone on spigot configs?

or paper configs idk

[desert rock]

@EventHandler
public void onSprintToggle(PlayerToggleSprintEvent event) {
    event.getPlayer().setSprinting(false);
}``` I don't stop sprinting when I press ctrl

[chrome beacon]

cancel the event?

[desert rock]

Same

[chrome beacon]

You probably want to set the hunger to stop spriting

or is there an attribute for that now?

Anyways since there will be latency between the event and the player actually starting to sprint

[desert rock]

Then the hunger bar will probably look strange.

[toxic goblet]

Hello guys i have created a plugin and im trying to make a custom texture pack for it but i dont understand how to do it i have created a file with all of the textures and models but i cant get it to work

[chrome beacon]

What part do you need help with

and what have you tried

[toxic goblet]

i have tried putting some override thing i dont really understand in in some .json files and custom id data or smth then put on the recource pack but nothing happened

[chrome beacon]

You're going to have to be a lot more specific than that

[smoky anchor]

What version are you making the resourcepack for. That is important
You say you're trying to use custom model data (probably). Do you need that? If it's just a simple custom model like a very fancy sword then there is a better way in newer versions.

[toxic goblet]

im using 1.21.11 i have created custom swords with custom abilitys and i want custom models for them so far i have created a folder with
assets - minecraft - models - item. then the custom items name.json
pack.mcmeta textures - item. then png of the custom textures
pack.png
thats the stuff i have in the folder i dont know what more i need to explain this is my very first plugin and recource pack

[smoky anchor]

Ok, so you only need simple custom model, great!
I'd recommend just opening up the vanilla resourcepack (or use this github link) and copying stuff from there
Per each custom model you will need the following files
namespace/items - Eg
namespace/models/item Eg
namespace/textures/item Eg
I'd recommend not using the minecraft namespace and instead using your own
then on the plugin side, when creating your custom items you call setItemModel the key is created from the bolded parts: minecraft/items/acacia_boat.json (here you'd use your namespace and your item model definition file name)

[buoyant viper]

lowk make this a wiki post

[smoky anchor]

eh

I don't think I could write a decent guide

[buoyant viper]

one of the pages is literally just a list of particle names from 1.8

ur good

[smoky anchor]

lol

[buoyant viper]

someone else could always come by and improve it later

[smoky crow]

Hi, I'm new to plugin development, where should I start?

[chrome beacon]

Do you have any programming experience?

[thorn isle]

giving me money is always a good way of starting anything

[solid heart]

Learn Java basics. After that, start a project and don't use too many tutorials

[misty ingot]

im trying to make a system where when a player dies, their head is placed nearby at a safe spot
but im facing an issue with if the player dies to the end void and theres no blocks nearby to put the head on, or if they die by drowning in a large ocean where theres no "safe" blocks nearby

have you guys run into this problem before? whats the best compromise for this?

[misty ingot]

?java

woops

?learnjava

[undone axle]

For Beginners:

Codecademy - Learn Java: Interactive Java programming course from basics to more advanced concepts. Perfect for absolute beginners.
https://www.codecademy.com/learn/learn-java
JetBrains Academy - Java Developer Track: Learn by doing with projects and challenges. It covers Java fundamentals to advanced topics.
https://www.jetbrains.com/academy/
Udemy - Java Programming Masterclass for Software Developers: Updated courses that cover Java 8 to Java 17 features. Suitable for those who prefer structured learning.
https://www.udemy.com/course/java-the-complete-java-developer-course/

For Intermediate to Advanced Learners:

Oracle Java Tutorials: The official guides by Oracle for Java programming—great for understanding the depth of Java.
https://docs.oracle.com/javase/tutorial/
Baeldung - Learn Java and Spring: Focus on Spring Framework and modern Java technologies. Best for intermediate learners aiming to expand their knowledge.
https://www.baeldung.com/

Practice and Hands-on Learning:

Exercism - Java Track: Solve exercises and get feedback from mentors. Great for practicing coding skills.
https://exercism.io/tracks/java
LeetCode: Practice your coding skills and prepare for technical interviews with Java.
https://leetcode.com/

Free Resources and Documentation:

Java Programming and Documentation: A comprehensive collection of Java programming guides, tutorials, and API documentation.
https://docs.oracle.com/en/java/

Community and Support:

Stack Overflow: A vast community of developers. Great for getting help with specific problems or understanding concepts.
https://stackoverflow.com/questions/tagged/java
r/learnjava on Reddit: Join the community of Java learners and get advice, share resources, and discuss projects.
https://www.reddit.com/r/learnjava/

Remember: Learning to program takes practice and patience. Don't hesitate to experiment with code and participate in community discussions. Happy coding! 🎉

[misty ingot]

there we go

[young knoll]

You could put it on top of the ocean

Or just track where they last touched solid ground

[still bear]

Hey, I'm looking for an experienced Java developer specialized in high-performance backend systems. Must be proficient with NMS, packet handling, and asynchronous data management (Redis/SQL). If you're interested in building a scalable, custom engine from the ground up, please DM me for a brief technical discussion.

[young knoll]

?services

[undone axle]

If you wish to request or offer development/art/building/administration services, please do so at https://www.spigotmc.org/forums/services-recruitment-v2.54/

[still bear]

Help on a project

[slender elbow]

If you wish to request or offer development/art/building/administration services, please do so at https://www.spigotmc.org/forums/services-recruitment-v2.54/

[mortal hare]

is it possible to somehow for intellij to download javadocs of std lib?

[thorn isle]

it does that for me when i click the "download sources" button, or do you mean the html javadocs specifically?

[chrome beacon]

Download sources and documentation

[thorn isle]

also works for any external libraries that have published sources

[lilac dagger]

if on linux, download jdk sources from your package manger

it wasn't automatic for me

only the docs were

[mortal hare]

yea

just realised that arch packages docs externally

[lilac dagger]

then yeah use package manager to dl sources for your jdk version

it was something openjdk-version-sources

then here just add it

/usr/lib/jvm/openjdk-25

for me it's here

probably for you as well

[mortal hare]

ofc arch puts docs somewhere else

because why wouldnt you

we love fragmentation

https://tenor.com/view/linus-nvidia-fuck-you-nvidia-linux-linus-torvalds-gif-5267420752109892596

[lilac dagger]

you can use the docs like this

[mortal hare]

does community edition has branch coverage ui available in intellij?

i remember on ultimate edition there was this feature where you can visually see which test reaches what branch

not sure if this is paid feature or not

[lilac dagger]

I have not tried this yet

[chrome beacon]

I believe so

[thorn isle]

this shit again

[slender elbow]

choke on a blender

[thorn isle]

it's unreal how i get locked out of my account any time i DM someone first, but these spambots continue to be a problem year after year with seemingly no checks or balances on them

[lilac dagger]

never have i been banned by discord, and i hope to keep it this way

altho twitter removed my tweet i think because it looked like ai

it was something on the line: "curse boldly with a hint of red"

for a html/css hack

[mortal hare]

i fucking hate how java doesnt support generics on exception types

[lilac dagger]

meh, you get used to it

it has cool stuff like multiple catches or multiple cases with Exception1 | Exception2

[thorn isle]

still better than manually checking raised error flags

[umbral ridge]

thats awesome

https://cdn.discordapp.com/emojis/925785718125629451.gif?size=96&quality=lossless

[lilac dagger]

awesome 😄

[thorn isle]

🤡

again

it's been like an hour

[lilac dagger]

damn

you're unlucky as hell

[barren peak]

trying to teleport a block display chest inside of a slime (constantly every tick) but its inconsistent sometimes it works and sometimes its just off by like a block (as shown)

tried all of these and they do about the same; don't work
display.teleport(slime.getLocation().clone().add(-0.5, 0, -0.5));
display.teleport(slime.getLocation().clone().add(0.5, 0, 0.5));
display.teleport(slime.getLocation());

(first image is what it should always look like, but often it looks like second image instead)

[vagrant stratus]

yea, might be easier to wait until sulfur cubes release and check how they do it lol

[mortal vortex]

check how they do it.

is this something they do?

[mortal vortex]

are you using runTaskTimer or runTaskTimerAsynchronously?

[vagrant stratus]

Yea, the new sulfur cubes will have blocks inside of em. I think that's what they might be trying to re-create here

https://minecraft.wiki/w/Sulfur_Cube

[mortal vortex]

@barren peak try Transformation btw

attach the display via a passenger and use Transformation to offset it.

[mortal vortex]

• also, this looks like you're getting the location within the lambda, shouldnt you do it before?

liek:

Location muhammad = slime.getLocation();
Bukkit.getScheduler().runTask(plugin, () -> {
    display.teleport(muhammad.clone().subtract(0.5, 0, 0.5));
});

[thorn isle]

Muhammad the slime

[orchid gazelle]

no, it's muhammad the location

[fickle spindle]

what should i use to make a new plugin? i was using Minecraft Development but idk it isn't working rn

[orchid gazelle]

you can also just use default maven, define your project, and put the api to your pom

if you just wanna get it running

but we can also help you with fixing your current environment if we get more info

[fickle spindle]

okay ty and i should create the folders and files by myself right?

[orchid gazelle]

if you are using IJ, creating with maven does everything for you pretty much

you just define the plugin yml in your resources folder

[fickle spindle]

i tried to build a new project with Minecraft Development but it's giving error importing bukkit in the main file and on the pom it gives error about artifactId

[orchid gazelle]

create a package as root

and you are gooid

[orchid gazelle]

which error?

[fickle spindle]

brb

[naive minnow]

is there any reason to use protocollib > nms? I just spent 2+ hours trying to solve a protocollib problem and when I switched to nms I solved it in like 30 seconds

[lilac dagger]

I don't use protocollib because when i had my server it was using too much ram and it was crashing my server which made me stay away from it as a developer

And yeah doing it in nms is usually faster which is nice too

But i'm pretty sure it's just because you're not familiar with the wrapper nature of protocollib

[naive minnow]

I couldn't figure out how to make it stop wrapping everything in a {"name": "value"} structure without remaking some of the stuff

for nbt

[lilac dagger]

I see

[fickle spindle]

i figured out how to do it thanks, but how can i support each time of color like &5 and hex too?

[lilac dagger]

Minimessage or ChatColor translate alternative and for hex you would use one of these 2 https://github.com/Fr33styler/BenchmarkZone/blob/main/src%2Fmain%2Fjava%2Fro%2Ffr33styler%2Fbenchmarkzone%2FMain.java

The java version or regex version

[fickle spindle]

and how should i detect them like how can i detect when i have to use one and when i know i have to use the other?

[lilac dagger]

Just replace the string once when's possible and that's that.

If you get it from config replace & to color char and from #aabbcc to the supported hex format

[thorn isle]

punctuation

[lilac dagger]

One moment

And then back again if you want to save configs and keep it nice

[thorn isle]

i mean the other guy

i can barely read what he's saying

[slender elbow]

maybe it's because we aren't meant to

[young knoll]

?paste

[undone axle]

Looking to paste something? Try a code block or one of the following websites:

• https://pastes.dev/
• https://sourceb.in/
• https://mclo.gs/ (best for server logs)

[kind hatch]

Would patching a vanilla bug be something that spigot would allow? Or does it depend on what the bug is?

[sullen marlin]

Depends on the bug and the patch, but probably

[kind hatch]

Cool, well I've been looking into these issues.
https://hub.spigotmc.org/jira/browse/SPIGOT-7228
https://bugs.mojang.com/browse/MC/issues/MC-149563/https://bugs.mojang.com/browse/MC/issues/MC-279073

I have multiple would-be patches for this, but wasn't sure which would be best.

One of which specifically targets the enderman, and the other that handles all mobs effected by this

[sullen marlin]

I think all mobs would be ok but you need to be careful it doesn't affect targeting/anger across worlds if that's a thing

[mortal hare]

vavr seems to be such a nice lib to work with

[thorn isle]

did spigot do anything with the world format in 26

i see paper tearing their asses apart over it trying to do some new world dir structure of their worn

[sullen marlin]

Spigot uses the same world structure it has since multi world was introduced ~15 years ago. The only difference with 26.1 is the folder names have changed from DIM# to dimension/name

(same change as Vanilla)

[thorn isle]

makes sense

[eager hawk]

What's up guys, I'm almost finished with my Hide and Seek plugin, but I'm just struggling on one last issue.
My BlockDisguise class looks like this: https://pastebin.com/WFKfzmTt
As you can see in the clip (, even though the player is invisble, I can still hit their body. https://medal.tv/nl/games/minecraft/clips/mpyj624hllXd1MkdM?invite=cr-MSxQUjQsMTk4OTMwNTE5&v=8
Is there a way to disable this and only be able to hit the block on the armorstand, without the player body being there for the seekers?

I tried stuff like p.setCollidable(false) and others but that didn't seem to work out.

Thanks in advance!

[thorn isle]

this won't be effective against hacked clients or people with hitboxes enabled in the debug, but you could scale the player down to be near 0 blocks in size, and make sure they and the armorstand are contained in the hitbox of the interaction entity/block display

to be effective against hacked clients, you'd want to actually remove the player entity or make them appear to be somewhere else

this is easy with the paper player visibility api, but will cause the player to also disappear from the tab player list

[chrome beacon]

Spigot also has visibility api smh

[lilac dagger]

Player#hidePlayer

and player.spigot().setcollidable false

for arrows

i really disliked how paper handled the arrow colliding with armor stand

you can't hit armor stands, they just bounce off them

i should probably try with a size 0 hitbox

[eager hawk]

Thanks for the info!

[eager hawk]

But then the player is also removed from tablist, isn't that a bit weird in a hide and seek minigame?

Since I assume it's best to keep alive players in the tablist, but yeah then I have this issue like you can see on my clip, I'm trynna find a way around that works fine, looks good and is effective but I can't seem to find something

[young knoll]

What version are you in

[eager hawk]

1.20.1

[young knoll]

Ah, rip

Can’t use the scale attribute

[eager hawk]

Ah shit :') I'm working on it for a specific server which is 1.20.1 so unfortunately I can't upgrade

Do you have an idea how I could work around this?

[young knoll]

Hmm

You could put the player into spectator and then have them spectate a tiny entity

But then they won’t be able to move without pressing shift first

[eager hawk]

Yeahh I thought about that too, but like you say they can't really move then which is not so effective :(

[young knoll]

You could disable the damage event and then manually raytrace to check for players hitting the hiders

[eager hawk]

Yeah that could be an idea, I just feel like, even though the Damage Event is disabled, the players body is like in the way of the armorstand (if you get what I mean)

Like even when I'm trying to hit the Astand im still hitting the body first

bcs its in the way

[young knoll]

Hence the manual raytrace

You can have it ignore certain entities

[eager hawk]

Oh okay that sounds good, will I still hear the sound of hitting a "body" when the event is disabled?

Like not damaging but the hit sound

[young knoll]

https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/World.html#rayTraceEntities(org.bukkit.Location,org.bukkit.util.Vector,double,double,java.util.function.Predicate)

I think so

[eager hawk]

I will check it out thanks a lot!

If anyone else has more suggestions let me know, I will look into everything in the meantime :)

[wraith spade]

yo, how do i check a players main hand then check if it has a specific lore? im using an onclick event rn bit i need to check if the item they are clicking with has a certain lore (a custom weapon), thanks

[buoyant viper]

?jd-s

[undone axle]

https://hub.spigotmc.org/javadocs/spigot

[buoyant viper]

i believe it is Player.getEquipment()#getItemInMainHand()

and then u can do getLore on that items metadata

u should probably be using a PDC instead of lore for custom item tracking though, imo

?pdc

[undone axle]

https://www.spigotmc.org/threads/a-guide-to-1-14-persistentdataholder-api.371200/

[wraith spade]

alright thanks, will try

[sharp swan]

hi, may I send a picture here?
I would like to present my idea

[mortal vortex]

No-one is stopping you, either verify your account to get attachment perms or use imgur.

[sharp swan]

Hey, some time ago I started working on a survival plugin where the main idea was to have a 3D interactive UI inside the Minecraft world, something similar to the floating interfaces you see in movies or anime.

The reason I started this was because commands can sometimes be hard to use for players, especially when there are a lot of them or when they require explanation. So I thought about replacing commands with a visual screen that players can interact with directly.

The project eventually turned into an API.

It’s still in development, but it’s close to being finished. The main things left are adding scrolling for long content and providing more ready-to-use components so developers can build and customize their own interfaces more easily.

The system allows you to create multiple screens per player, each with its own independent content. For example, you could have a notification screen, an inventory-like screen, or anything else you want.

In short, the idea is to let developers build any kind of system and connect it to a visual UI inside the world.

I’m mainly curious about one thing:
Would anyone actually be interested in using something like this?

[mortal vortex]

damn so this is with resourcpeacks right?

[sharp swan]

no. this is Text_Display entity. and Item_Display

[mortal vortex]

DAYUMMMM thats cooler

put this on github dude, send a linkkkkk

[mortal vortex]

shoula started with that , makes it wayy more impressive

[sharp swan]

Yes, so far the result is impressive, and I’m considering releasing it later as a system once it’s ready. However, I wanted to know if anyone would actually be interested in using this system in the first place.

[naive minnow]

What’s the point of the sulfur cube?

I don’t get it

I think anything they could do could be done with display entities as well

[sharp swan]

.sorry

[mortal vortex]

i dont think he was talking to you.

i think hes mentioning the thing hes replying to

[sharp swan]

I hate Google Translate

[naive minnow]

😭

[wraith spade]

yo so i need to find the itemmeta for a projectile (trident) to find the pdc of it, is there a way to get the item's meta still? thanks

[mortal vortex]

Trident, the entity?

idk what you mean "projectile", once they are thrown, they transition from an ItemStack to a Trident entity... it is no longer an "item", so im not sure what you mean "item's meta". accessing an entity's PDC does not require accessing any other data

(... instanceof Trident trident) PersistentDataContainer pdc = trident.getPersistentDataContainer();

[wraith spade]

oh, I didnt know that mb im pretty new to this, thank you this is what i meant

[mortal vortex]

Nah all good mate, best of luck

[smoky anchor]

I doubt the items pdc will transfer to the projectile entity
You can use trident.getItem and then get the items pdc from there
just saying this in case the guy wants something else

[mortal vortex]

pretty sure it does

[wraith spade]

just tried and it doesnt

[mortal vortex]

aww shmucks

my apolocheese

[wraith spade]

because for this it returns null:
NamespacedKey key = new NamespacedKey(JavaPlugin.getPlugin(Main.class), "tridentkey");
PersistentDataContainer pdc = trident.getPersistentDataContainer();
String value = pdc.getOrDefault(key, PersistentDataType.STRING, "<null>");
player.sendPlainMessage(value);

nah all good

[mortal vortex]

well yeah then

ItemStack item = trident.getItemStack();
ItemMeta meta = item.getItemMeta();

[wraith spade]

item meta doesnt work for projectiles though right?

[smoky anchor]

getItem() not itemStack

[smoky anchor]

?main and you should either use dependency injection or static private variable with a getter to get the plugins instance scratch this, apparently bad practice?

[undone axle]

https://www.spigotmc.org/threads/why-you-shouldnt-name-your-main-plugin-class-main.493289/

[mortal vortex]

my bad g

[wraith spade]

thank you it worked (i think atleast so far)!

[weak wasp]

That Main post is BS, dude just doesn't like naming it Main.
All other projects need a main class as an entry point, so does your plugin specified in plugin.yml.

I don't see anything wrong with using Main, and that post does nothing to change my mind.

[thorn isle]

yes, but it's not the Main class or entry point of the application

you can call it MyPluginMain, but Main alone is unspecific and not ideal

suppose for example you depend on 3 different plugins and have to interact with their main classes

now you have 3 ambiguous Main's that you have to reference via fully qualified name

[lilac dagger]

^

[slender elbow]

:chatting:

[lilac dagger]

All my plugins are named SomethingPlugin

[ivory sleet]

gotta be rage bait

[slender elbow]

blue checkmark xitter account levels of engagement bait

[buoyant viper]

ion even name my standalone programs Main fr

that shit named Entrypoint

[lost matrix]

lol, ill name my next listener class just 'Listener' as well.
And my next manager just 'Manager'.

I like this. Keeps things simple.

[buoyant viper]

if less same, why more?

[sly topaz]

https://tenor.com/bDxyE.gif

[whole mist]

As of right now I am working on a Java plugin for geofenci g. Anyone have better idea than maxmind considering maxmind only does country? I am trying to restrict a regional for compliance

import com.maxmind.geoip2.DatabaseReader;
import com.maxmind.geoip2.model.CityResponse;
import com.maxmind.geoip2.record.Subdivision;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.AsyncPlayerPreLoginEvent;

import java.io.File;
import java.io.IOException;
import java.net.InetAddress;

public class JurisdictionalGuard implements Listener {

    private DatabaseReader reader;

    public JurisdictionalGuard(File databaseFile) {
        try {
            this.reader = new DatabaseReader.Builder(databaseFile).build();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @EventHandler
    public void onPreLogin(AsyncPlayerPreLoginEvent event) {
        InetAddress ip = event.getAddress();
        try {
            CityResponse response = reader.city(ip);
            Subdivision subdivision = response.getMostSpecificSubdivision();
            
            if (subdivision.getIsoCode() != null && subdivision.getIsoCode().equalsIgnoreCase("CA")) {
                String kickMessage = "§c[SECURITY NOTICE]\n" +
                                     "§fAccess from your jurisdiction is restricted.\n" +
                                     "§7Reason: §fCompliance with CA AB 1043 / AADC.\n" +
                                     "§7Infrastructure: §ePrivate / Non-Commercial\n" +
                                     "§cUnauthorized access is a violation of 18 U.S.C. § 1030.";
                
                event.disallow(AsyncPlayerPreLoginEvent.Result.KICK_BANNED, kickMessage);
            }
        } catch (Exception e) {
            // Log or ignore lookup failures
        }
    }
}

[thorn isle]

what do you need? state?

[whole mist]

Yes.

After some more research I realized the issue was using the MaxMind Country DB, which doesn't contain subdivision data. Swapping to the GeoLite2-City database allows the getMostSpecificSubdivision() call to correctly return ISO codes like 'CA'.
​I am now implementing a "Double-Check" redundancy logic using IP2Location as a secondary provider. If either database flags the IP as a restricted jurisdiction, the connection is dropped. Here is the updated null-safe logic for those implementing this:

@EventHandler
public void onPreLogin(AsyncPlayerPreLoginEvent event) {
    InetAddress ip = event.getAddress();
    try {
        CityResponse response = reader.city(ip);
        
        // Ensure subdivision data exists before checking ISO code
        if (response.getMostSpecificSubdivision() != null) {
            String isoCode = response.getMostSpecificSubdivision().getIsoCode();
            
            if (isoCode != null && isoCode.equalsIgnoreCase("CA")) {
                String kickMessage = "§c[SECURITY NOTICE]\n" +
                                     "§fAccess from your jurisdiction is restricted.\n" +
                                     "§7Reason: §fJurisdictional Compliance (AADC).\n" +
                                     "§7Infrastructure: §ePrivate / Non-Commercial\n" +
                                     "§cUnauthorized access is a violation of 18 U.S.C. § 1030.";
                
                event.disallow(AsyncPlayerPreLoginEvent.Result.KICK_BANNED, kickMessage);
            }
        }
    } catch (Exception e) {
    }
}

Sorry to have bothered you all.

[solid heart]

Spigot convention, from what I've seen, is to name your entrypoint class the same as your plugin name

[desert rock]

Is it possible to get information about right-clicking on air/water without an item in hands?

[sly topaz]

you can workaround the fact that interact event isn't called in that scenario by placing an interaction entity at the player's line of sight at all times

[desert rock]

good option

[echo basalt]

or fill all the empty slots with invisible items or something

[buoyant viper]

we got age gated minecraft before gta 6

[wraith spade]

so basically I have a custom bow setup which uses a PDC to check if its that custom bow, what I am doing rn is checking if the bow is in their mainhand, i do a get inventory then item in mainhand then getitemmeta AFTER the arrow has landed, the problem is they can switch before the arrow lands which makes it not work, I wanna make it so it basically goes through their entire inventory till they find the bow, and if it does it works but if it doesnt it returns. thanks in advance

[quasi gulch]

And whats the question? Did you get any errors in your code?

[wraith spade]

no, im just asking if anyone has a doc or like idea of how to do it

[vagrant stratus]

Honestly, 26.1 is completly unobfuscated just check both the server and client until you see how vanilla handles bow & crossbow enchantments and rewrite it for your situation @wraith spade

[smoky anchor]

https://mcsrc.dev/ if you're too lazy to setup a local repo

[heady inlet]

Hey everyone,

I am facing a very strange issue on Purpur 1.21.11 (Java 21) regarding programmatic chest manipulation.

The Goal:
I am spawning a chest block via code (after a falling block animation lands). I then want to fill this chest with items inside a runTaskLater task.

The Problem:
The chest is placed correctly, but the inventory modifications do not persist.

• addItem() returns an empty map (indicating success).
• setContents() executes without errors.
• chest.update(true, false) returns true.
• BUT: Immediately checking inv.getContents() shows the items are gone (Air/Null).
• The client sees an empty chest (both Java and Bedrock via Geyser).

It feels like I am modifying a detached snapshot, even though I fetch the Chest state fresh inside the delayed task.

What I tried:

1. Increased delay (tried 1 tick up to 20 ticks/1 second).
2. Used addItem(), setItem(), and setContents().
3. Called chest.update(true, false) and b.getState().update(true, false).
4. Ensured chunk is loaded (chunk.isLoaded() check).

Environment:

• Server: Purpur 1.21.11
• Java: OpenJDK 21
• Minimal plugins: Geyser, Floodgate, LuckPerms (no inventory protection plugins active).

Code Snippet:

// Inside runTaskLater (20 ticks delay)
Block b = loc.getBlock(); // Block is Material.CHEST

if (!(b.getState() instanceof Chest chest)) return;

Inventory inv = chest.getBlockInventory();

// DEBUG: Items exist
plugin.getLogger().info("Items to add: " + items.size()); // Output: 5

// Attempt
HashMap<Integer, ItemStack> failed = inv.addItem(items.toArray(new ItemStack[0]));
plugin.getLogger().info("Failed items: " + failed.size()); // Output: 0

// Update
boolean success = chest.update(true, false);
plugin.getLogger().info("Update success: " + success); // Output: true

// IMMEDIATE CHECK
int check = 0;
for (ItemStack i : inv.getContents()) {
if (i != null) check += i.getAmount();
}
plugin.getLogger().info("Items in inventory: " + check); // Output: 0 (!!!)

Debug Logs:

[INFO] Items to add: 5
[INFO] Failed items: 0
[INFO] Update success: true
[INFO] Items in inventory: 0

Has anyone experienced this on 1.21+? Is there a new mechanism for TileEntity updates that I am missing, or is this a potential server bug? Any help is appreciated!

[thorn isle]

try getState(false)

iirc the default even on paper is to get a snapshot of the state

i don't 100% remember how that works with inventories, but presumably the state snapshot would also have a snapshot of the inventory, which, being separate, would remain empty even after you put items in it

it's generally better to avoid the whole state::update nonsense altogether and just directly modify the live state rather than a snapshot

[slender elbow]

i'm 99% sure that getState(false) really only works for read-only ops, and it gets weird on write ops, vaguely remember you'd still need to call getState(true) and BlockState#update

[heady inlet]

Hey @thorn isle,

Thank you very much for the suggestion! I tried using getState(false) to access the live state directly, but unfortunately, the issue persists. The inventory still reports as empty immediately after adding items.

It seems like there might be a deeper issue with how the TileEntity is handled in this specific build.

I have opened a GitHub Issue with the full details and code examples.

I really appreciate your help!

Thanks @slender elbow ! I actually started with that approach. I used getState(true) (snapshot) and called update(), but it had the exact same result: addItem succeeds, but checking getContents() immediately shows 0 items. It seems both the snapshot and the live state are broken for inventory modification in this build.

[slender elbow]

add more emojis to your responses and use a more enthusiastic tone

[heady inlet]

Hey @slender elbow, I'm sorry, I'm from Germany and I'm trying my best to translate it so that it isn't completely misunderstood.

[thorn isle]

development aside, i encourage you to learn english

[robust helm]

🦅🦅🦅

[heady inlet]

You are absolutely right! 😅🙌 Thank you for the honest advice!

It is definitely on my to-do list! 📚✍️ I know using a translator isn't a long-term solution, but I'm trying my best to improve every day! 💪🧠

Thanks for your patience with my messages! You guys are the best! 🚀✨

[robust helm]

WHAT THE FUCK

[sullen canyon]

You filthy walking bag of microchips

[robust helm]

ich übersetze: du schmutzige gehende tasche von mikrochips

[sullen canyon]

IIoiiieJl Haxyu uHblMu CjloBaMu

[ancient plank]

if you listen to the bow fire event you can do your check there and add pdc for the bow's identifier on the arrow, then check damage and whatnot on hit instead

that's how my pvp plugin manages projectiles

[wary harness]

How do you get custom craft recepies show in crafting book?

[worldly ingot]

The client has to be aware of them, so you'll have to discover them

https://hub.spigotmc.org/javadocs/spigot/org/bukkit/entity/HumanEntity.html#discoverRecipe(org.bukkit.NamespacedKey)

(you can also pass a Collection of keys, so use that if you want to discover multiple)

[wintry parrot]

can anyone help me find a working unstable map

[chrome beacon]

??

unstable map

[wintry parrot]

unstable smp map

the hardcore server the whole map with the builds

[chrome beacon]

this is the help development channel ;/

[outer ember]

hi
from iran

[wintry parrot]

yes that part of my dev for my server

[chrome beacon]

I mean actual development

making plugins etc

use #help-server

[inner mulch]

this is supposed to be a cube, the coordinates of the edges are all correct for a cube, the offset is due to the scaling of the individual blockdisplay, with which math function do i translate all edges accordingly?

[slim wigeon]

Hey there. I trying to add IRC to my server for the chat bridge and admin management, could you help me with what library to use?

I tried to use: <dependency> <groupId>org.pircbotx</groupId> <artifactId>pircbotx</artifactId> <version>2.3</version> </dependency>But it does not exist

[green mauve]

how can i change entity drops?

[sullen marlin]

https://central.sonatype.com/artifact/org.pircbotx/pircbotx/2.1

Latest on maven is 2.1

[slim wigeon]

hile executing task 10
java.lang.NoClassDefFoundError: org/pircbotx/Configuration$Builder
        at com.mrnategeek.irc.Bot.startBot(Bot.java:11) ~[?:?]
        at com.mrnategeek.irc.Main.lambda$0(Main.java:12) ~[?:?]
        at org.bukkit.craftbukkit.v1_21_R1.scheduler.CraftTask.run(CraftTask.java:82) ~[spigot-1.21.
1-R0.1-SNAPSHOT.jar:4344-Spigot-a759b62-19bf846]
        at org.bukkit.craftbukkit.v1_21_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[sp
igot-1.21.1-R0.1-SNAPSHOT.jar:4344-Spigot-a759b62-19bf846]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
 ~[?:?]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
 ~[?:?]
        at java.base/java.lang.Thread.run(Thread.java:1575) [?:?]
Caused by: java.lang.ClassNotFoundException: org.pircbotx.Configuration$Builder```

[mortal vortex]

are you shading

[slim wigeon]

I tried and it does not work

[mortal vortex]

what "doesnt work"

idk what to tell you, Configuration$Builder exists, you're just building wrong

[slim wigeon]

Maybe I not doing it right because I add the proper shading code, it does not add what you call the libraries needed like in this case pircbotx. It just has my code "org.mrnategeek.irc"

[mortal vortex]

my brother in christ,

can I see the "code"

your pom?

[slim wigeon]

Where do I post it?

[mortal vortex]

preferably in this server?

[slim wigeon]

https://pastebin.com/ySBdnhKf

[mortal vortex]

where is the shading

you just said you add the proper shading code, I dont see the shading code

[slim wigeon]

I added it some point but let me add it again and send it to you

There it is: https://pastebin.com/seeiY7e8

With the pom.xml like that, this is the error:

hile executing task 10
java.lang.NoClassDefFoundError: org/pircbotx/Configuration$Builder
        at com.mrnategeek.irc.Bot.startBot(Bot.java:11) ~[?:?]
        at com.mrnategeek.irc.Main.lambda$0(Main.java:12) ~[?:?]
        at org.bukkit.craftbukkit.v1_21_R1.scheduler.CraftTask.run(CraftTask.java:82) ~[spigot-1.21.
1-R0.1-SNAPSHOT.jar:4344-Spigot-a759b62-19bf846]
        at org.bukkit.craftbukkit.v1_21_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[sp
igot-1.21.1-R0.1-SNAPSHOT.jar:4344-Spigot-a759b62-19bf846]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
 ~[?:?]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
 ~[?:?]
        at java.base/java.lang.Thread.run(Thread.java:1575) [?:?]
Caused by: java.lang.ClassNotFoundException: org.pircbotx.Configuration$Builder
        at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:160) ~[spigot-
api-1.21.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:112) ~[spigot-a
pi-1.21.1-R0.1-SNAPSHOT.jar:?]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:528) ~[?:?]
        ... 7 more```

[thorn isle]

i remember you

you're the guy who thought using git meant making your code public

[slim wigeon]

Not now

[mortal vortex]

LOL OMG THIS GUY

[mortal vortex]

How are you building your plugin?

mvn clean install? mvn package?

[mortal vortex]

ur not even using the right dependency here

<groupId>com.github.pircbotx</groupId>
<artifactId>pircbotx</artifactId>
<version>2.2</version>

[slim wigeon]

Which one should I use. Remember the Ellipse Platform? That is what I using. No mvn

[mortal vortex]

Also im confused homeboy

[mortal vortex]

you sent this code, the artifact here is:

<artifactId>MG-Staging</artifactId>

[mortal vortex]

that isnt the same as the error you gave me

are you sending the wrong code or something

[thorn isle]

i think he's saying he's building it through eclipse or something, without maven

[mortal vortex]

if he's building it through eclipse why does he have a pom file

[thorn isle]

maybe he's running maven through eclipse, god knows

[mortal vortex]

oh right yeah

[slim wigeon]

No, I did not look at the pom.xml file. I copied it from my MG-Staging project. That is why its there

[thorn isle]

riiight

[mortal vortex]

Eclipse in the big 26? you arent my 60 year old Systems Programming teacher right?

is that you Phil?

[thorn isle]

i blame uh