How to conserve momentum through respawns but change the direction of the momentum

[chilly parcel]

basically im making some portals- or well redoing the cv1 code and i want to be able to keep the momentum but change the momentum direction according to the direction the exit portal is facing, any help?

[fathom olive]

Don't use respawn, use set pos and velocity set.

[solemn mesa]

get the entrance velocity and invert it on the way out

[fathom olive]

this is def a Ctrl + F moment.

[chilly parcel]

second question, h o w, im not the best with the velocity chips

[solemn mesa]

get velocity then subtract it from itself twice

[chilly parcel]

so this would work per direction?

[fathom olive]

Welp, hopefully CC finds this and links the proper threads. This is something that's already been answered. I couldn't find it, I'm dumb. 😛

[solemn mesa]

so velocity - velocity - velocity

[chilly parcel]

alright lemme try

[solemn mesa]

yep i think?

[fathom olive]

https://discord.com/channels/193073071802941451/1078453222492094574

Found one of them

[chilly parcel]

ive got static portals luckily for me, i wasnt about to code a portal gun tbh

[dusky cypress]

Rotate the player rotation by inverse of entry portal rotation then rotate that by exit portal rotation, set transform the player with that as rotation if you want the player to face the right direction (pretty sure that's how)

[chilly parcel]

so two subtract chips, one with just the player velocity, one with the player velocity and the first subtract chips result?

[solemn mesa]

No 1 with 3 ports

[dusky cypress]

@chilly parcel , that will make both direction and rotation good

Speed is just player velocity magnitude

Might have said something wrong, tell me if it doesn't work

[chilly parcel]

all of this is currently going over my head, so first get the rotation opposite of the portal, transform the player with that rotation?

[solemn mesa]

T55Milk is better at this than i am so go with their idea

[dusky cypress]

Get local player>get rotation
Get entrance portal>get rotation>quaternion inverse
Get exit portal>get rotation

[chilly parcel]

everyone here is better than me

[dusky cypress]

Rotate 1 by 2 then then the result by 3

[chilly parcel]

thanks lemme try this

[chilly parcel]

so set player rotation by entrance portal then that by the exit portal?

[dusky cypress]

Inverse of entrance

[chilly parcel]

so just by the inverse of the entrance?

[dusky cypress]

Then by exit

[chilly parcel]

this is gonna be me gfetting to dumber levels, how again?

[dusky cypress]

What

[chilly parcel]

i have no clue what im doing is what im saying, this is honestly my first time screwing around with set rotations

like all i really need is just like the x and z axis kept for velocity

[dusky cypress]

Just do everything I said

Result of 3 goes into set transform

[chilly parcel]

what chip am i using for rotation? there isnt a result? or am i using an add chip or sum?

[dusky cypress]

These are the chip

Rotate 1 by 2 and the result by ,3

Then set transform

[chilly parcel]

this is what im asking how to do

[dusky cypress]

Multiply

[chilly parcel]

ahh

[dusky cypress]

I think

Try multiply

[chilly parcel]

it worked!

thank you

sorry for hitting roadblocks a couple times

wait

hold on

so ive got a portal at a | position and a portal at a _ position, i drop from top to bottom and its not pushing me forward

[dusky cypress]

So that's rotation

Now do the same with velocity then add velocity

[chilly parcel]

hm okay

so local player velocity times itself?

or legit the same

[dusky cypress]

Legit do the same

but since velocity is a vectorrrr

hmmmm

Either convert it to quaternion

Or try with vectors idk if it works

Oh nvm it won't work

Just make the velocity as a quaternion

[chilly parcel]

alright, i still have a respawn chip going, should i still use that?

[dusky cypress]

Nah

Set transform

[chilly parcel]

what do i connect the pos input too again?

[dusky cypress]

The pos you want the player to be

when he enters

[chilly parcel]

issue

im set 90 degrees anticlockwise from the area i want to be flung, also no flinging occurs

[chilly parcel]

its fine if i just hook that to a pos of a vector gadget?

[shrewd nymph]

@chilly parcel @dusky cypress @solemn mesa @fathom olive

Here is a thread I helped someone with containing basically everything you will need for a portal
https://discord.com/channels/193073071802941451/1059293094119473233

The entire thread covers relative velocities and directions for entering and exiting portals

[dusky cypress]

Yeah couldn't find it

[shrewd nymph]

Just search "Keep velocity"

[chilly parcel]

uhfue thanks

[dusky cypress]

@shrewd nymph do you always need a variable?

[shrewd nymph]

Yes

[dusky cypress]

So set variable then set rotation?

[shrewd nymph]

Save the velocity direction
Save the look direction

1. Rotate both by the inverse of the entrance portal rotation
2. Rotate both by the rotation of the exit portal rotation
3. Reflect both by the forward direction of exit portal

You will need a third variable if you want to keep relative position, which you probably should

Relative position is different, you cant just rotate it back and forth

[fathom olive]

Thanks CC, I knew you had a better thread.

[dusky cypress]

Does it work with player rotation?

[shrewd nymph]

Save the look direction

tbh i might just make a "Portal relativity board" because its very confusing math

well, not to me, but

[dusky cypress]

I know but is there a way to do it with player rotation too or only direction

[shrewd nymph]

No, because that wouldnt make sense for VR users

[dusky cypress]

Oh

[shrewd nymph]

Or screenmode users

[dusky cypress]

yeah true

They should make a camera rotation thing tbh

[shrewd nymph]

No, they shouldnt, ever

[dusky cypress]

oh

Why

[shrewd nymph]

Rotating the camera would be disorienting as shit, and like I said, wouldn’t make sense

[dusky cypress]

Mehh idk

[shrewd nymph]

See, for screenmode, it makes sense to be able to their look direction (No roll)

For VR, it only make sense to set their Y axis rotation, as anything else would rotate the camera in weird ways

But configuring the roll on either of those is a stupid idea

[dusky cypress]

Yeah true

[chilly parcel]

so i copied the code in the message #1059293094119473233 message

im obviously missing something

as well it doesnt take the down fall velocity and convert it

if i enter the bottom portal from the left side it does work

thats it

also is DEF speeding the player up

so if im falling down into the portal i dont gain any forward velocity out of the exit portal

the code in question btw

so the vec3 var is now in the player entered port, when excu it sets vel

[sour elm]

That’s about portal hit detection stuff