How would i make a LinearVelocity that goes away from a specific object | Roblox Studio Community | Page 1

celest monolith Oct 12, 2025, 6:03 AM

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its cuz im trying to make a wall jump, but i tried to use the lookvector of the wall but it will only launch me in the direction that the wall is looking, so i need it to be able to launch me away from the wall not just in the direction its facing but idk how to do it.

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currentwall is the object im trying to make the velocity launch away from

river wasp Oct 12, 2025, 6:18 AM

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try multiplying the walls look vector by -1

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lmk if that works

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@celest monolith

grand sparrow Oct 12, 2025, 6:57 AM

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celest monolith its cuz im trying to make a wall jump, but i tried to use the lookvector of the ...

Shoot I responded to your other thing but depending on how you have everything set up you could try raycasting to the wall and set velocity to the normal of the result * force

celest monolith Oct 12, 2025, 8:19 AM

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river wasp try multiplying the walls look vector by -1

in the wall jump script or

celest monolith Oct 12, 2025, 8:19 AM

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river wasp try multiplying the walls look vector by -1

that just removes all the horizontal momentum

celest monolith Oct 12, 2025, 8:20 AM

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grand sparrow Shoot I responded to your other thing but depending on how you have everything s...

i dont really know how to make a raycast

grand sparrow Oct 12, 2025, 8:23 AM

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celest monolith i dont really know how to make a raycast

https://create.roblox.com/docs/workspace/raycasting theres a pretty good roblox guide about raycasting might be worth a look

river wasp Oct 12, 2025, 8:24 AM

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the top line do * -1

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(click in the image i sent)

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if this is what you did then nvm

grand sparrow Oct 12, 2025, 8:26 AM

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Also when raycasting be careful about whitelisting/blacklisting the correct parts so you dont pick up junk

celest monolith Oct 12, 2025, 8:27 AM

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river wasp the top line do * -1

yea i already tried that

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it just gets rid of all the horizontal movement because its such a low number

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im gonna try sand's idea

grand sparrow Oct 12, 2025, 8:27 AM

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Goodluck

celest monolith Oct 12, 2025, 8:27 AM

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thanks

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but to create the raycast in the right direction i would need some way to tell the code to put it in the opposite direction of the wall

tropic notchBOT Oct 12, 2025, 8:28 AM

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studio ** You are now Level 11! ** studio

celest monolith Oct 12, 2025, 8:29 AM

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so i need a way to make it basically

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go away from the wall

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but idk how to detect that in code

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i just need a way for a cframe/vector 3 to point away from a certain object

grand sparrow Oct 12, 2025, 8:30 AM

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You need to make it shoot to the wall, and when it detects a hit to the wall it will return some values along with the hit normal, the hit normal points away from the wall

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Imagine red is the wall, and blue is the normal vector

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I can try drawing something out or explaining it a little better if needed btw 😭

celest monolith Oct 12, 2025, 8:42 AM

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hmm ok

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i tried to make a raycast with the humanoidrootpart position that goes to the wall's position, but it made this error

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nvm i forgot to put .position after hit

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my fault lemme try again

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ok there was no error so i beleive the raycast was created, its just not visible cuz i dont think raycasts are visible by default

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does the raycast need a parent to be visible or something

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added direction to it and tried to print the raycast result but it made this error:

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nvm i wasnt supposed to put rayend into the result

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now it works

grand sparrow Oct 12, 2025, 9:13 AM

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celest monolith now it works

Nice got it all working?

celest monolith Oct 12, 2025, 9:13 AM

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lemme record

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its a bit imprecise but it works

thorny niche Oct 12, 2025, 9:14 AM

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lmao

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oh

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i wasnt looking at the right message

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😭

celest monolith Oct 12, 2025, 9:15 AM

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the main problem is that it gets screwed up when you use it on a flatter wall

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most likely because it makes the raycast smaller

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grand sparrow Oct 12, 2025, 9:16 AM

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Can we see the updated code

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and ngl Imma go to sleep Ill continue helping in the morning 😭🙏

celest monolith Oct 12, 2025, 9:17 AM

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here

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grand sparrow Oct 12, 2025, 9:20 AM

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celest monolith

Thats one way to do it are you using ray result at all?

celest monolith Oct 12, 2025, 9:20 AM

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if i use rayresult instead of raydirection it make this error

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lemme find it

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grand sparrow Oct 12, 2025, 9:22 AM

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It doesnt return a vector or a number it returns this

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https://create.roblox.com/docs/workspace/raycasting#hit-detection

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.Normal should help you also please read that article it explains how to blacklist stuff so raycast wont be blocked by your player

grand sparrow Oct 12, 2025, 9:23 AM

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celest monolith

Another way you could do is get the unit vector of what you’re doing rn and multiply it by a set amount that way it will always be the same

celest monolith Oct 12, 2025, 9:24 AM

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grand sparrow Another way you could do is get the unit vector of what you’re doing rn and mult...

the unit of the raydirection?

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or something else\

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ima just save this and work on it tomorrow

river wasp Oct 12, 2025, 11:10 AM

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grand sparrow .Normal should help you also please read that article it explains how to blackli...

isn’t it now .Exclude not .Blacklist

grand sparrow Oct 12, 2025, 3:16 PM

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river wasp isn’t it now .Exclude not .Blacklist

What are you trying to say 😭

grand sparrow Oct 12, 2025, 3:16 PM

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celest monolith the unit of the raydirection?

Yes, and multiply that by a set force and that should give you the same amount of force regardless of wall size

high quarry Oct 12, 2025, 3:18 PM

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celest monolith its cuz im trying to make a wall jump, but i tried to use the lookvector of the ...

Combine the hrp look vector with the wall look vector

grand sparrow Oct 12, 2025, 3:18 PM

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high quarry Combine the hrp look vector with the wall look vector

they already got it kinda working look

grand sparrow Oct 12, 2025, 3:19 PM

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celest monolith

!

high quarry Oct 12, 2025, 3:19 PM

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grand sparrow they already got it kinda working look

Ah

celest monolith Oct 13, 2025, 3:29 AM

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ok im back now im gonna try to do some of the things u guys suggested

celest monolith Oct 15, 2025, 6:29 AM

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grand sparrow Yes, and multiply that by a set force and that should give you the same amount o...

would the set force just be a flat number?

celest monolith Oct 15, 2025, 6:32 AM

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high quarry Combine the hrp look vector with the wall look vector

what does hrp stand for again sorry

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oooh humanoidrootpart

grand sparrow Oct 15, 2025, 6:34 AM

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celest monolith would the set force just be a flat number?

yes

celest monolith Oct 15, 2025, 6:37 AM

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wouldnt this already be a set forrce

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or do i do all this + a set force

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yea i tried adding a set force typa thing but the same problem still happens

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if u do it against the flat part of a wall u get no distance

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yo

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@grand sparrow

grand sparrow Oct 15, 2025, 6:59 AM

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Thats not normalized

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When you normalize a vector all of its components add up to 1 and when you multiply by a scalar force you should always get the same magnitude

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Ah mb I forgot roblox calls it unit vectors they are the same thing

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https://create.roblox.com/docs/reference/engine/datatypes/Vector3#Unit

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@celest monolith

celest monolith Oct 15, 2025, 7:02 AM

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thamks

grand sparrow Oct 15, 2025, 7:03 AM

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celest monolith thamks

Goodluck keep me updated

celest monolith Oct 15, 2025, 7:31 AM

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grand sparrow Goodluck keep me updated

how do i do the abs thing

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is it part of the raycast result or direction

grand sparrow Oct 15, 2025, 7:33 AM

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celest monolith how do i do the abs thing

abs?

celest monolith Oct 15, 2025, 7:33 AM

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this thingy

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or is it not even part of the raycast

grand sparrow Oct 15, 2025, 7:33 AM

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Oh thats what I meant I was talking about the Unit vector

grand sparrow Oct 15, 2025, 7:33 AM

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celest monolith

does this work already?

celest monolith Oct 15, 2025, 7:34 AM

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kinda

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the direction and velocity are still messed up by the size

grand sparrow Oct 15, 2025, 7:35 AM

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try


= (walljumpdirection + currentwall.CFrame.UpVector).Unit * -30

keep in mind you're probably gonna have to change -30 a bit until it works but it shouldnt be messed with size anymore

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Also as you dont end up actually raycasting or using "rayresult" Id suggest deleting raycast for performance

tropic notchBOT Oct 15, 2025, 7:36 AM

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studio ** You are now Level 8! ** studio

grand sparrow Oct 15, 2025, 7:36 AM

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tropic notch <:studio:832959238488850433>** You are now Level 8! **<:studio:83295923848885043...

wow Im getting old

celest monolith Oct 15, 2025, 7:41 AM

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grand sparrow try ```lua = (walljumpdirection + currentwall.CFrame.UpVector).Unit * -30 ```...

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basically the same issue, regardless of if it's rayresult or direction

grand sparrow Oct 15, 2025, 7:42 AM

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celest monolith

-30 might not be enough try like -300

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keep walljumpdirection as it was ray direction

celest monolith Oct 15, 2025, 7:43 AM

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just sends me flying even further, and its still effected by the size too

grand sparrow Oct 15, 2025, 7:43 AM

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Can I see code and screenrecord

celest monolith Oct 15, 2025, 7:46 AM

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here code

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everything before that is just variables

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like userinpout service and stuff

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lemme get recording

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grand sparrow Oct 15, 2025, 7:47 AM

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celest monolith here code

you forgot to do .Unit on the ()

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= (walljumpdirection + currentwall.CFrame.UpVector).Unit * -30

celest monolith Oct 15, 2025, 7:47 AM

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oh mb

grand sparrow Oct 15, 2025, 7:47 AM

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No worries 🫡 lets see if thats better

celest monolith Oct 15, 2025, 7:49 AM

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ok the velocity is consistent now, i just need to get the direction to be consistent

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lemme send recording

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wait nvm im stupid its just the same

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if i go to the center of a flat shape theres just no distance

grand sparrow Oct 15, 2025, 7:51 AM

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Wanna try raycasts 🥹

celest monolith Oct 15, 2025, 7:51 AM

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it already uses a raycast

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are u talking about rayresult?

grand sparrow Oct 15, 2025, 7:51 AM

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Yes

celest monolith Oct 15, 2025, 7:51 AM

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instead of raydirection

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lemme try that

grand sparrow Oct 15, 2025, 7:51 AM

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No

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Can you send your code formatted like

```lua

[code]

```

like this please

celest monolith Oct 15, 2025, 7:56 AM

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whoa

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ok its weird to type like that

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i might have been wrong earlier
i think its the right velocity with the raydirection
it just looks bad cuz the actual direction you get flung in isnt in the normal arc of a jump

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its the right velocity i just need to get it in the right direction

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just like

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make the ray point upward away from the wall or something

grand sparrow Oct 15, 2025, 7:58 AM

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wait before we try raycasts try this first

= walljumpdirection.Unit * -30 + Vector3.new(0, 30, 0)

celest monolith Oct 15, 2025, 8:01 AM

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grand sparrow wait before we try raycasts try this first ```lua = walljumpdirection.Unit * -3...

same issue as before, right velocity but wrong direction

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idk if its possible but im tryna make it send you straight in the direction of the side you're on

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kinda like this

grand sparrow Oct 15, 2025, 8:03 AM

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recalculate this part

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right before here

grand sparrow Oct 15, 2025, 8:03 AM

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celest monolith idk if its possible but im tryna make it send you straight in the direction of t...

I get what you're going for

celest monolith Oct 15, 2025, 8:03 AM

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oh ok thanks

celest monolith Oct 15, 2025, 8:04 AM

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grand sparrow recalculate this part

should the rayorigin be something else like the wall
and then the rayend be the rootpart?

grand sparrow Oct 15, 2025, 8:05 AM

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that wouldnt change anything it would just flip signs

grand sparrow Oct 15, 2025, 8:05 AM

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grand sparrow Can you send your code formatted like \```lua [code] \``` like this please

can you do this first 😭

celest monolith Oct 15, 2025, 8:06 AM

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grand sparrow recalculate this part

i know this might sound dumb but i dont really know what u mean by recaulculate

grand sparrow Oct 15, 2025, 8:08 AM

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celest monolith i know this might sound dumb but i dont really know what u mean by recaulculate

its not a dumb question its okay, but it would be a lot easier to show you if you sent me your code in text rather than image format

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even if its just this part

celest monolith Oct 15, 2025, 8:08 AM

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ok lemme try

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RootPart.Touched:connect(function(hit)
    if debounce == false then
        if hit:HasTag("Wall") then
            print(hit)
            debounce = true
            RootPart.Anchored = true
            currentwall = hit
            print(currentwall)
            local rayorigin = RootPart.Position
            local rayend = hit.Position
            local raydirection = rayend - rayorigin
            local rayresult = workspace:Raycast(rayorigin, raydirection)
            print(rayresult)
            walljumpdirection = raydirection
        end
    end
end)

UserInputService.InputBegan:Connect(function(input, gameProcessed)
    if input.KeyCode == Enum.KeyCode.Space then
        if debounce == true then
            RootPart.Anchored = false
            --RootPart.Velocity = currentwall.CFrame.LookVector * 70 + currentwall.CFrame.UpVector * 70
            --RootPart.Velocity = walljumpdirection * -3 + currentwall.CFrame.UpVector * 70
            --RootPart.Velocity = (walljumpdirection + currentwall.CFrame.UpVector).Unit * -100
            RootPart.Velocity = walljumpdirection.Unit * -60 + Vector3.new(0, 60, 0)
            task.wait(.1)
            debounce = false
        end
    end
end)

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there

grand sparrow Oct 15, 2025, 8:11 AM

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thank you

RootPart.Touched:connect(function(hit)
    if debounce == false then
        if hit:HasTag("Wall") then
            print(hit)
            debounce = true
            RootPart.Anchored = true
            currentwall = hit
            print(currentwall)
        
        end
    end
end)

UserInputService.InputBegan:Connect(function(input, gameProcessed)
    if input.KeyCode == Enum.KeyCode.Space then
        if debounce == true then
            local walljumpdirection = currentwall.Position - RootPart.Position
            RootPart.Anchored = false
            --RootPart.Velocity = currentwall.CFrame.LookVector * 70 + currentwall.CFrame.UpVector * 70
            --RootPart.Velocity = walljumpdirection * -3 + currentwall.CFrame.UpVector * 70
            --RootPart.Velocity = (walljumpdirection + currentwall.CFrame.UpVector).Unit * -100
            RootPart.Velocity = walljumpdirection.Unit * -60 + Vector3.new(0, 60, 0)
            task.wait(.1)
            debounce = false
        end
    end
end)

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try this

celest monolith Oct 15, 2025, 8:14 AM

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its a bit better, it consistently goes upward now

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the direction is still messed up

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grand sparrow Oct 15, 2025, 8:18 AM

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nvm I get the issue 😭 turns out we are gonna need raycasts after all

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walljumpdirection calculates to the center not where the collision happened lets continue this tomorrow Im gonna head to bed 3 am where Im at

celest monolith Oct 15, 2025, 8:21 AM

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ok

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goodnight thannks for the help

celest monolith Oct 16, 2025, 9:44 PM

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im back if ur available

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i have a saved version of the script that uses raycast since were just gonna use raycast again

celest monolith Oct 17, 2025, 9:31 PM

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yo

celest monolith Oct 18, 2025, 5:41 AM

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grand sparrow walljumpdirection calculates to the center not where the collision happened lets...

are u able to continue rn
im ready rn if ur available

grand sparrow Oct 18, 2025, 5:43 AM

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celest monolith are u able to continue rn im ready rn if ur available

Yo sorry, didnt see these thank you for the ping

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I got you

celest monolith Oct 18, 2025, 5:43 AM

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ok lemme load studio up

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ok

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here's the system i have rn

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i guess we gotta figure out a way to get a consistent direction, the velocity is fine

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how can we like
make the raycast go consistently in the direction of the wall and not just a straight ray from us to the wall

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is there a way to detect the surface of the thing u touched

grand sparrow Oct 18, 2025, 5:51 AM

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local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Include

RootPart.Touched:connect(function(hit)
    if debounce == false then
        if hit:HasTag("Wall") then
            raycastParams.FilterDescendantsInstances = {hit}
            print(hit)
            debounce = true
            RootPart.Anchored = true
            currentwall = hit
            print(currentwall)
            local rayorigin = RootPart.Position
            local rayend = hit.Position
            local raydirection = rayend - rayorigin
            local rayresult = workspace:Raycast(rayorigin, raydirection * 10, raycastParams)
            walljumpdirection = rayresult.Normal
        end
    end
end)

UserInputService.InputBegan:Connect(function(input, gameProcessed)
    if input.KeyCode == Enum.KeyCode.Space then
        if debounce == true then
            RootPart.Anchored = false
            RootPart.Velocity = walljumpdirection * 60 + Vector3.new(0, 60, 0)
            task.wait(.1)
            debounce = false
        end
    end
end)

just balled this try it

celest monolith Oct 18, 2025, 5:53 AM

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same thing

grand sparrow Oct 18, 2025, 5:54 AM

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oops

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Ok edited the code

local rayresult = workspace:Raycast(rayorigin, raydirection * 10, raycastParams)

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this line

celest monolith Oct 18, 2025, 5:55 AM

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i think the raycast itself can detect the surface of the thing you touched

grand sparrow Oct 18, 2025, 5:56 AM

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Did it do the same thing?

celest monolith Oct 18, 2025, 5:56 AM

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holy shit i think you did it

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lemme record

grand sparrow Oct 18, 2025, 5:57 AM

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celest monolith holy shit i think you did it

This was my idea with the normals lol

celest monolith Oct 18, 2025, 5:57 AM

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i gotta put you in the game's credits atp

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grand sparrow Oct 18, 2025, 5:57 AM

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I would be honored

celest monolith Oct 18, 2025, 5:57 AM

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lemme just try to understand how it works

grand sparrow Oct 18, 2025, 5:58 AM

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Lemme draw it out

celest monolith Oct 18, 2025, 5:59 AM

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is the normal like

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the part where the ray bounces off

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of the wall

grand sparrow Oct 18, 2025, 5:59 AM

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Yes

celest monolith Oct 18, 2025, 5:59 AM

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ooooh that makes sense

grand sparrow Oct 18, 2025, 5:59 AM

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celest monolith Oct 18, 2025, 5:59 AM

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cuz i was looking at examples of rays outside of coding and i figured out thats what the noraml is

grand sparrow Oct 18, 2025, 5:59 AM

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Normal vector

celest monolith Oct 18, 2025, 5:59 AM

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aaah

grand sparrow Oct 18, 2025, 5:59 AM

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Math helps a lot yes

celest monolith Oct 18, 2025, 6:00 AM

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so when a ray touches a surface, in bounces straight off that surface and thats what a normal is?

grand sparrow Oct 18, 2025, 6:00 AM

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Calculus 3 helped me a lot

grand sparrow Oct 18, 2025, 6:00 AM

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celest monolith so when a ray touches a surface, in bounces straight off that surface and thats ...

Not exactly, normal is just the direction of the face

celest monolith Oct 18, 2025, 6:01 AM

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OOOOH

grand sparrow Oct 18, 2025, 6:01 AM

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I wish I was better at drawing

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found this online tho

celest monolith Oct 18, 2025, 6:01 AM

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so its the direction the surface it touched was facing?

grand sparrow Oct 18, 2025, 6:01 AM

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imagine those arrows as the normal vectors

celest monolith Oct 18, 2025, 6:02 AM

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aaaah

grand sparrow Oct 18, 2025, 6:02 AM

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celest monolith so its the direction the surface it touched was facing?

Where the ray hit, its the direction where the face is looking

celest monolith Oct 18, 2025, 6:02 AM

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so the ray's normal is basically looking in the same direction that the touched surface is facing?

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ok that makes sense

grand sparrow Oct 18, 2025, 6:03 AM

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celest monolith so the ray's normal is basically looking in the same direction that the touched ...

Yeppp exactly

celest monolith Oct 18, 2025, 6:05 AM

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ok lemme add the credits of the game cuz i lowkey havent done that yet

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for ur part of the credits do u want ur roblox username or ur discord

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@grand sparrow

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if u wanna be in the credits

grand sparrow Oct 18, 2025, 6:08 AM

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celest monolith for ur part of the credits do u want ur roblox username or ur discord

Discord sounds good salute

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GlowSand/EndoTulpa works

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thats both

celest monolith Oct 18, 2025, 6:10 AM

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very WIP credits cuz the game is early in development

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oops typo

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fixed the typo

grand sparrow Oct 18, 2025, 6:18 AM

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celest monolith

AYEE THANK YOU

#How would i make a LinearVelocity that goes away from a specific object