how to raycast

[frozen pecan]

I am trying to restart my 3x3 mining pickaxe goal for which I got to know that I need raycasting which I know nothin about

[umbral acorn]

<@&1201956957406109788>

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[frozen pecan]

the raycasting is for detecting blocks mineable by the (netherite) pickaxe as it can only mine blocks in the pickaxe_mineable tag

[wicked shadow]

soo

basically

step first

type /method raycast

second

read

[elder jewel]

⚙️Raycast

If you've not made many datapacks, you might not be familiar with raycasting. It's a really useful tool which we can use to essentially find where the player is looking and then do stuff (such as spawn explosions 😎).

To create a raycast, we can use a recursive function. A recursive function is a function which will run itself over and over again. In our case, the function will run itself 0.1 blocks forward (^ ^ ^0.1) each time, and repeat until it hits something. It will do this all within the same tick - but bear in mind that the bigger the distance, the more laggy it will be. We can stop this unwanted behaviour by putting a distance limit on the raycast - each time it runs itself, it will count down on a scoreboard, and only repeat if it hasn't hit the limit.

start_raycast function:

# Set the distance limit on the raycast. (10 x limit in blocks, so 1000 would be 100 blocks)
scoreboard players set .limit <any objective> 1000

# Start the raycast
execute at @s anchored eyes positioned ^ ^ ^.1 run function <namespace>:raycast

raycast function:

# Remove one from the limit
scoreboard players remove .limit <objective> 1

# Optional - place a particle, to make the raycast leave a trail
particle minecraft:dust 1 0 0 1 ~ ~ ~

# If the raycast has hit a block, do something
execute unless block ~ ~ ~ #<namespace>:pass_through run setblock ~ ~ ~ diamond_block

# If the raycast hasn't hit a block, continue, but only if the limit is 1 or more (1..)
execute if block ~ ~ ~ #<namespace>:pass_through positioned ^ ^ ^0.1 if score .limit <objective> matches 1.. run function <namespace>:raycast```

namespace/tags/blocks/**pass_through**.json:```
{
    "replace": false,
    "values": [
        "minecraft:air",
        "minecraft:cave_air",
        "minecraft:void_air"
    ]
}

This should be it! Make sure you add all the functions, and fill in all the blanks (indicated by <this>). Then, you can run the start_raycast function as a player, and it should work.

[wicked shadow]

look

there it is

[frozen pecan]

oh

thank you

[wicked shadow]

lmk if you have any issues or confusing moments with this method

[frozen pecan]

ok

what do you mean by: 0.1 block forward" ?

@wicked shadow

[wicked shadow]

well

literally 0.1 blocks forward

[frozen pecan]

so it runs every tick?

[wicked shadow]

raycast is essentially like a beam that first checks current position whether its a block, if its not it will move forward on 0.1 blocks it will repeat that over and over until it reaches a block and then you type your code like destroy the block or whatever

[wicked shadow]

it runs recursively, as fast as your cpu allows (very fast, a lot faster than tick)

[frozen pecan]

woow

wait so can I use raycasting for a pickaxe eto detect blocks

[wicked shadow]

"eto" ?

[frozen pecan]

like if the player is looking at a block, it signals the pickaxe if it is mineable with a tag from where the raycasting runs

am I right?

[frozen pecan]

to

[wicked shadow]

you could do that

[frozen pecan]

so can it sense blocks around that

[wicked shadow]

around what

[frozen pecan]

as in the player looks at the centre block of the 3x3, how does it detect remaining blocks under the mineable tag

[wicked shadow]

how?

[wicked shadow]

execute if block

ig

[frozen pecan]

oh

so I gotta setup 8 predicates linked to the raycast

so let me get it straight, If the block looking at by the player is under the tag, it runs the raycast which results in 8 more predicates and if not under the tag, doesn't at all.

lemme quickly go through the wiki to actually learn to input commands or functions

@wicked shadow can you suggest a tutorial or site to learn coding

[wicked shadow]

8 predicates?

[frozen pecan]

well it has to detect blocks in every single direction to the mined block so actually more than 8

so more like 27 predicates cuz a 3x3 miner mines in a cube of 3x3x3 so 27

am I correct? @wicked shadow

[wicked shadow]

hell no

0 predicates

tf you mean

[frozen pecan]

huh

[wicked shadow]

where you get these numbers from

[frozen pecan]

my small brain

[wicked shadow]

execute if block

24 times actually

or maybe 27 if you have that big

[frozen pecan]

how?

[wicked shadow]

yea well usually when people mean 3x3 pickaxe it mines a 3x3x2 space 99% of the time, but if yours is 3x3x3 then ig yea its 27 blocks

[frozen pecan]

yeah you're right cuz of air blocks

[frozen pecan]

so, what is the command to execute ifblock at the right/left/diagonal

[wicked shadow]

figure it out bruh

you never used relative coordinates

?

i am pretty sure there is a video on relative coordinates on youtube

[frozen pecan]

ok

[frozen pecan]

yeh I m not getting how to code it

[wicked shadow]

did you make a raycast already?

[frozen pecan]

umm not yrt

give me a min

@wicked shadow how do I code it in?

I know nothin about coding

[wicked shadow]

huh then why are you saying you're not getting it? you're not even there

just code the raycast first

divide your main goal into small tasks

[frozen pecan]

ok

[wicked shadow]

so its manageable

1st raycast
2nd block detection

[frozen pecan]

kk

[frozen pecan]

wait, what ais the difference?

[wicked shadow]

exactly like it was written in the tutorial

[wicked shadow]

one is raycast the other one is block detection

dont ask too many questions, sooner you get to work - the sooner you will realise

raycast as i explained is a beam, and block detection is... well a block detection

[frozen pecan]

kk

[frozen pecan]

ook

[frozen pecan]

I have done it

so what now @wicked shadow

[wicked shadow]

fr?

so fast?

[frozen pecan]

mhm

[wicked shadow]

what did you test it on

[frozen pecan]

wdym

[wicked shadow]

like

what did you use to test it

you shoot a block

or entity

or what

[frozen pecan]

block

just copied the code

like you told

[frozen pecan]

this thing

[wicked shadow]

i never in my life told you to copy nothing

i said

do exactly like here

[frozen pecan]

..

[wicked shadow]

what are these dots for?

you are implying i told you?

when?

[frozen pecan]

you just told me to copy what's written in the tutoril

tutorial*

[wicked shadow]

i never

told you that

[frozen pecan]

bruh ok

so let me reset it

[wicked shadow]

i said
"do exactly like here"

[frozen pecan]

ahh ok

I misunderstood it

my bad

[wicked shadow]

okk so you shoot a block and then what happens

[frozen pecan]

I am lost

[wicked shadow]

so you said raycast is working right

you tested it on a block

[frozen pecan]

I did not say tested

rather done codign it

coding*

[wicked shadow]

-how did you test it, did you shoot a block or an entity?
-block

[frozen pecan]

give me a minute

[wicked shadow]

here you agreed that you tested it on a block

[frozen pecan]

uhm no

[wicked shadow]

screenshot evidence

[frozen pecan]

sorry

[wicked shadow]

no need to sorry

i am sorry for making you feel like you should apologize lmao

you wanna vc rn

[frozen pecan]

nah all good

[frozen pecan]

In school

online to be exact

uhh @wicked shadow

https://drive.google.com/drive/folders/1_FEsfAIahMJ50bAkwjeTTpwRa7X0zmoY?usp=sharing

can you please tell me my mistake in the code

it ain't detecting

[wicked shadow]

why are you even making datapack at school.......

[wicked shadow]

can you just send it as a zip

or just copy the code

[frozen pecan]

kk

[frozen pecan]

online breh

[wicked shadow]

oh alright

[frozen pecan]

here

but the thing I don't get is how does the raycast link up with the block detection?

[wicked shadow]

what in the who

did you make this by tutorial?

[frozen pecan]

mhm

some minor adjustments but yep, it's from a tutorial

It detects an entity

[wicked shadow]

oh so it works?

[frozen pecan]

no

I just went through the code and understood that it detects an creeper

but it did not load in for me

it didn't even detect my datpack

[wicked shadow]

ohhhhhhhhhh

let me open up my neovim..

[frozen pecan]

k

[wicked shadow]

who tf made the tutorial

@deep pelican can you ask ppl to replace current raycast tutorial with a better one? maybe i will make a pr myself

p.s. i am sorry for ping, not relevant anymore

[frozen pecan]

https://www.youtube.com/watch?v=qUO-iQ_wWEI

[frozen pecan]

😄

[wicked shadow]

oh bro

[frozen pecan]

oh

[wicked shadow]

you should use this

[frozen pecan]

2 yrs

[wicked shadow]

bro

that raycast

[frozen pecan]

ight

[wicked shadow]

is bad

[frozen pecan]

yeh 2 yrs old too

imma get to that 10-15minutes, I am getting a call, excuse me please

[wicked shadow]

no prob

[frozen pecan]

back

not loading up 😦 @wicked shadow

any fixes?

[wicked shadow]

what does that even mean

@frozen pecan what do you mean not loading up

[wicked shadow]

@frozen pecan whats not loading up

[frozen pecan]

sorry, the datapack is not being recognized @wicked shadow

[wicked shadow]

there is no way, screenshot the insides of your datapacks folder

[wicked shadow]

@frozen pecan

[frozen pecan]

KK

[wicked shadow]

silabear set offline status

[wicked shadow]

whats this

@frozen pecan send content of your datapacks folder

as a screenshot

[frozen pecan]

ah

@wicked shadow

[craggy obsidian]

I think they meant the datapacks folder of your world

Where that data pack is placed into

Also - if you /datapack list - does it show up?

[wicked shadow]

HELL YEAS

[wicked shadow]

WORLD/datapacks/*

i am pretty damn sure your datapack is inside another folder and thats why it doesnt show up

because why elsse woudl there be extra folder in the zip you sent me

[craggy obsidian]

To be recognized and loaded, just the pack.mcmeta needs to be there and in the correct format

[wicked shadow]

it is

datapck is perfect, its just in the wrong location

[frozen pecan]

ah yes

got it

[wicked shadow]

AH YES GOT IT... (NO SCREENSHOT)

[frozen pecan]

sorry, I had to go run an errand

gimme a sec

my pc is dying

[wicked shadow]

is dead right

[frozen pecan]

wait bruh, my pc is shutting down every time I open VS code

I m panicking rn

[wicked shadow]

do you have your minecraft open at that same time too?

[frozen pecan]

nope

[upper gorge]

scary

and odd…

sorry idk why that might be 😭

[frozen pecan]

yr

@wicked shadow I fixed it

I add to close bacground applications in task manager, my cpu as at 118% lol

lemme try it out

[wicked shadow]

@frozen pecan down to vc like in 3 hours

[frozen pecan]

I don think I can

It's like 7AM rn and I got school by 8:30-9 ish

@wicked shadow

the pack ain't working for some reason

it should send out a red beam wherever I looked and turn every block I run into to a diamond

[wicked shadow]

bruh

does it still not show up ?

the folder structure should look like this

.minecraft/saves/YOUR WORLD/datapacks/raycasting/pack.mcmeta and it should show up

i am pretty sure what you have looks more like
.minecraft/saves/YOUR WORLD/datapacks/raycasting/raycasting/pack.mcmeta

because thats how you sent it here

[deep pelican]

do you ever create the gg scoreboard?

[frozen pecan]

uhh

[frozen pecan]

wdym

[frozen pecan]

I changed that

[wicked shadow]

he asks if you have
scoreboard objectives add gg dummy
in your load function

[wicked shadow]

thats not important right now since datapack isnt even showing up but all the paths and pack.mcmeta are correct lol

[unique pelican]

If you never run the command to initialise the scoreboard, it won't exist and therefore won't store any values

[wicked shadow]

.

[frozen pecan]

it does show up bro

[wicked shadow]

ohhh

why didnt you tell me

💀

[frozen pecan]

.

[frozen pecan]

.

[wicked shadow]

since then you've never said it shows up

[unique pelican]

Have you run this command?

[frozen pecan]

I should've said that, mb

[wicked shadow]

yea so ig just create the scoreboard in the load function

[frozen pecan]

nope

ight

uh

@wicked shadow

[unique pelican]

You need to put that in the file data/ray_demo/functions/load.mcfunction

[frozen pecan]

Oh bruh

I kept it in load.json

[unique pelican]

load.json tells the game which functions to run on load, the commands then need to go in the functions themselves

[frozen pecan]

ohk

[deep pelican]

You also need to create data/ray_demo/functions/load.mcfunction first

Then in that mcfunction you put the scoreboard command

[wicked shadow]

IN LOAD

[frozen pecan]

OK

[frozen pecan]

done

so now what? @deep pelican

[unique pelican]

Does it work now?

[frozen pecan]

nope

[unique pelican]

Lemme take a look at the files for a second, then I'll try and figure out what's wrong

[frozen pecan]

kk

[unique pelican]

So does the function not run at all?

[frozen pecan]

no

it should replace a block I hit with a diamond block I assume but doesn;t do it

[unique pelican]

Do you correctly run the start_raycast function? Like what prints in chat when you run the command

[frozen pecan]

it runs nothin

[frozen pecan]

what command?

[unique pelican]

/function ray_demo:raycast_start

[frozen pecan]

ok

[unique pelican]

That means the function hasn't loaded properly

Show me the chat output of /datapack list

I have to go now, I'll be back later. Maybe someone else can help you in the mean time

[frozen pecan]

k

uhh @wicked shadow please help

[unique pelican]

Looks like your datapack is disabled. Run /datapack enable raycasting

[frozen pecan]

ok

[unique pelican]

Now try the raycast function again

[frozen pecan]

k

[wicked shadow]

/datapacks enable raycasting

oh yea

[frozen pecan]

dobe

done*

[unique pelican]

Alright, see if this works

[frozen pecan]

it works

It places a diamond block herever I look

[unique pelican]

ok cool

[frozen pecan]

soo uhm how doesit help me make a3x3mining pickaxe?

@wicked shadow so what do I do from here?

[wicked shadow]

welp

now you test it

[frozen pecan]

did

it works

[wicked shadow]

NICE

FINALLY

HOLY CRAP

[unique pelican]

Basically, you want to detect the player using the pickaxe, then run a raycast to find the block they broke, and then destroy the 3 blocks around it

[wicked shadow]

NO WAY

LETS GO

[frozen pecan]

8*

[frozen pecan]

YE

[unique pelican]

that, I can't maths

[wicked shadow]

pls now ask help from the neovim guy

im playing valorant

[frozen pecan]

ight

[frozen pecan]

ok lol

[unique pelican]

The only problem is, the block they just broke is now broken

Which means you can't detect it with raycast

[frozen pecan]

hmm

so block detector

[unique pelican]

So there's probably two ways that you could do this

[frozen pecan]

hmm

[unique pelican]

One is to look for an item that is newly created, and assume that it came from the block they broke

The other is to check what block they are looking at each tick when holding that pickaxe, and then you know which block it is when they use it

[frozen pecan]

hmm

[unique pelican]

Those are the two that I can think of, anyway

[frozen pecan]

this seems more 'sane'

[frozen pecan]

how do i DO IT ...

[unique pelican]

But I haven't really made something like this before, so maybe someone else has a better way

Sorry, I have to go now. I can help you later

[frozen pecan]

np

[frozen pecan]

umm

help

[umbral acorn]

<@&935561184806060073> <@&1202694677766348840>

**🙇 Helpers Arise!**

Please note that you still might not immediately get a response since all helpers are human beings and volunteers (and also might be sleeping right now)

Requested by saigamez

[fiery stag]

isnt this resolved already

[wicked shadow]

not even close

[fiery stag]

whats the problem then

all i see is how to raycast

[swift pike]

you don't need raycasting, you can just check when the player uses the pickaxe, and once he does so mine the block around the block as well

[frozen pecan]

but it should only be able to mine blocks that can only be possibly mined by a pickaxe

[swift pike]

huh

what do you mean

do you mean blocks around it should only break if the correct tool is used?

well this exists https://github.com/misode/mcmeta/blob/data-json/data/minecraft/tags/blocks/mineable/pickaxe.json

[frozen pecan]

yeah

[frozen pecan]

oh

so umm how do I implement the code? @swift pike

[swift pike]

you need to init a scoreboard that tracks when the player uses his pickaxe

if they have 1 or more score they'll get it removed and the adjacent blocks will get broken (if they are a part of #minecraft:mineable/pickaxe)

and there loot table will be dropped on the floor

[frozen pecan]

uhm

I am new to coding @swift pike

[swift pike]

ohh wait i'm dumb

that doesn't work

cuz you don't have the block coords

[frozen pecan]

mhm the hitboxes

so I'd need the relative coords?

[swift pike]

you'd need the block coords of the recently mined block

raycast can't get you that info (unless you do it every tick)

[frozen pecan]

hmm

So how do I do it

[frozen pecan]

since I got the raycast done, I think this is better

so I need to setup block detection now right?

...

[swift pike]

execute if block ~ ~ ~ #minecraft:mineable/pickaxe

[frozen pecan]

so how do I get the coordinates of the block? @swift pike

[swift pike]

The only solution I can think of is to store the targeted block of the last tick somewhere

but that'll be really slow

[frozen pecan]

that would lag the gaem

game*

[swift pike]

on multiplayer, defintly

[frozen pecan]

this seems more complicated than I thought

[swift pike]

on singlplayer, maybe okay

[frozen pecan]

yep its for my server

[swift pike]

why don't you consider making a plugin instead

[frozen pecan]

what do you mean?

[swift pike]

a plugin

[frozen pecan]

how would it help?

[swift pike]

is something you put on a server

you code it with an api made to code

not to debug

[frozen pecan]

oh

I use aternos for hosting which doesn't allow to import plugins

I think I have to give a pause to this idea

and work on other concepts

I think I'll work on some basic things before reaching such stages like this

Time to close this ticket and open a different one

Thanks for the help!!

[umbral acorn]

Question Closed

Your question, #1204314612095524864 (how to raycast), was resolved!

Original Message

I am trying to restart my 3x3 mining pickaxe goal for which I got to know that I need raycasting which I know nothin about

Duration open

1d5h37m

[umbral acorn]

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