Faking a "Rope" using Velocity on a player

[turbid sentinel]

Im trying to make a grappling hook that uses more of a rope than a spring

It has a set Max Length and Pull Force

Assuming pull force is 0m/s for now, how can I ensure the length of the rope never goes above the max rope length (Within reason of course, doesnt have to be perfect, I just dont want it to be a spring)

This way players can actually swing on the rope, instead of akwardly swinging while also being pulled towards an object

My initial idea is to pull them to a position that is (MaxDistance)m away from the hit position if they are greater than (MaxDistance)m away from the hit position
I just worry that this method will have a player try to go backwards in some cases

[halcyon fiber]

While I don't have a solution, here's an idea, why not instead of using the exact hit position as the target to go to, the target is underneath the position equal to the distance of the rope.

So say the rope is 5m, the target would be 5m underneath the hit position

[turbid sentinel]

yeah that was my initial idea, testing it now

[halcyon fiber]

Imma take a shot in the dark and say it probably won't work, as the lines to the target wouldn't be curved

[turbid sentinel]

and thats where the backwards issue comes in, but i may have an idea

[halcyon fiber]

Ight

[turbid sentinel]

I have a "Meters to degrees" invention, which uses a Radius and Meters input, converts it to radians, and then converts that to degrees

My idea is to go to a position that is MaxDistance meters away from the hit position, but that is also rotated that many degrees based off player velocity, on the axis of the swing axis

[halcyon fiber]

That's a whole lotta words, sounds good to me

[wheat thunder]

When i created a graplin Hook, i set the velocity add to the Y of the trigger handle rotation, so when you look up you climb the rope, and when you look down your descending the rope, and at some point you can just stay still in the air.

@turbid sentinel

[fallen rain]

ultimate solution: set velocity to player's current "swing velocity" combined with "rope length"

im still waking up so sry if I sound stupid

[turbid sentinel]

im not using set velocity

I think this can be done with purely Add Velocity, I just need to know what to set the strength to

Maybe I can do something with dot product?

The further your velocity strays from the rope, the more it adds towards?

[fallen rain]

distance away from ideal position on rope?

use something like that?

idk

[turbid sentinel]

How would I find the "Swing Axis"?

The axis of which you were swinging around

[fallen rain]

you would need more than one axis anyways

you would want to calculate this based around the point the rope is coming from

[turbid sentinel]

Just the swing axis would let me rotate it to fake the curve

[fallen rain]

but that sucks

and if you build that, you suck by association

[turbid sentinel]

But it would be the best possible solution

[fallen rain]

No

The best solution is some maths that can calculate a swing in realtime in 3D space

[turbid sentinel]

how to I find swing axis tho

[halcyon fiber]

You'd somehow need a way to curve the line

Imagine you grappled from the top of an object

[fallen rain]

but you have to realize this rope is not in 2D space it is in 3D space

you need more than a swing axis if you want it to be good

[turbid sentinel]

that doesnt have to do anything with this

[fallen rain]

what

[turbid sentinel]

This sitation applies to 3D space too

The swing axis is a Vector3

[fallen rain]

you don't seem to understand !!!

there are curves that would require more than just one axis

[turbid sentinel]

I do understand

The "Swing Axis" is the direction of which you are rotating around

If I were to rotate (0,1,0) 90 degrees around (1,0,0), I would get (0,0,1)

[fallen rain]

i think

ok build it and i'll show you the critical flaw

[turbid sentinel]

im building it right now
tell me how to find the swing axis

[fallen rain]

but uh just make the axis based on the direction you are facing the point when you first grapple idk

[fallen rain]

try this crispycreator

[turbid sentinel]

If the axis were the direction I was facing, I would go in the complete wrong direction

[fallen rain]

no

no no

[turbid sentinel]

Do you understand what the "Axle" on a car is?

[fallen rain]

I mean you can find an axis based on the direction between you and the point

[turbid sentinel]

ah

[fallen rain]

i hope i make sense

[turbid sentinel]

but yeah

Think of the axle of a car as a vector3, and the wheel as the rotation

The wheel rotates perpendicular to the axis

[fallen rain]

am aware

but the thing is

a rope can curve around a point in its swing

like

not just on one 2D axis

[turbid sentinel]

Im not worrying about the rope colliding with other objects when you swing

[fallen rain]

no

not what I mean

quick question: how much sleep did you get last night

[turbid sentinel]

i havent slept yet

[fallen rain]

makes sense

[turbid sentinel]

y'know what im deadass about to try

[fallen rain]

i'd go get some sleep before you deadass try anything

[turbid sentinel]

adding velocity based off the dot product, not curving at all

[fallen rain]

just use a cv1 animation gizmo!!

problem solved 🤡

[turbid sentinel]

now im thinking

[fallen rain]

thats rare

[turbid sentinel]

How would I do it off dot product

[fallen rain]

you wouldn't

[turbid sentinel]

If im perpendicular to the direction, add nothing
If I am facing 1 or -1, add

ill litterally try taking absolute value

its probably not going to work at all

but im doing it

[fallen rain]

i

i have no words

have fun!!!

[turbid sentinel]

You havent helped me at all bruh

im just trying something

[fallen rain]

To be fair, i'm not sure if you have even helped yourself in this interaction

[turbid sentinel]

thats because this is confusing

[fallen rain]

it is

my head is in pain

[turbid sentinel]

Im going to try something else first thats harder to explain

Basically, adding velocity.. "Forward" relative to the axis

[fallen rain]

ok

i have my doubts about that working