keep velocity in different directions

[river tree]

most of the portal guns I've seen on the invention store either stop all movement when teleporting, face the wrong way or just output a constant velocity to launch the player in.

I want to keep it dynamic

well let's not bother them! I'd just wait for anyone's help

the thing is, get velocity wouldn't work as it outputs a vector3 signal and the "speed" category of the velocity set takes a float input

I think it's different? I tried using get magnitude and it didn't work

maybe cryptic could help out if they're not busy

[marble iron]

Player Get velocity>get magnitude>add velocity

Or set velocity i forgot

Direction would be depending of the pivot point

Make sure the blue is where the portal "goes"

Since it's forward

Then take portal forward vector

As direction

Probably pivot point being wrong

[river tree]

I'm using a vector component to make sure, so it's not that the pivot is wrong

[hearty marten]

Rotate velocity by inverse of input portal rotation and save it into a vector3 variable

Rotate that vector by the rotation of output portal

[river tree]

I've done exactly that with the magnitude

[hearty marten]

Make sure to add velocity 3 frames after setting position else it fails

[marble iron]

Can't you just use portal forward/up vector??

[hearty marten]

No, that doesnt account for roll, nor is it relative

[marble iron]

Pretty confused

[river tree]

but that would make it so it would always be the inverse velocity, what if the portal is facing up, or down, or just the same way the player is facing

[marble iron]

Why wouldn't it work?

[hearty marten]

Its not relative

[marble iron]

Wdym by relative

[marble iron]

No i meant

[hearty marten]

It wont work

[marble iron]

Get the forward vector of the portal that you got out

[hearty marten]

My method is simple and works flawlessly

[marble iron]

It's a little harde tbh 💀

[hearty marten]

Because that just launches you forward, not in the direction of your velocity relative to the input portal

[marble iron]

Oh thattt

Ok mb

[river tree]

but cryptic, wouldn't this happen?

[hearty marten]

Thats why you rotate by inverse of input portal rotation and rotate back by rotation of output portal

[hearty marten]

My method fixs that (Message above)

[marble iron]

Not sure to understand exactly what your method does

[hearty marten]

Quaternion magic
Relative rotations

[river tree]

yeah no I have no idea what this means

sorry

[marble iron]

I kinda get it but still kinda confuse

💀

[river tree]

so I get the velocity, do something to rotate it by the inverse of the initial portal rotation and put it in a vector3 variable?

how do I rotate it by the inverse of the portal? my brain is having a stroke

[marble iron]

Same i don't get what he means by the inverse of the portal

[river tree]

no I get that

[marble iron]

I don't

[river tree]

I don't get how I rotate the velocity

[river tree]

just the opposite direction of where you walk into the portal

[marble iron]

Ohh

Scale to -1 probably if it's that

[river tree]

okay but how do I rotate the velocity by the inverse of the portal though

that's the question

not what the inverse of the portal is

[marble iron]

Get portal rotation

[river tree]

and what do I do with the portals rotation? how do I use it to rotate the velocity?

English isn't my first language so maybe I'm just not getting it

[marble iron]

Same

Vector3 rotate btw

It's a chip

[river tree]

don't patronize me like that...

I know what a vector3 chip is

[marble iron]

"Vector 3 rotate"

It's a chip 💀

[hearty marten]

Inverse of portal rotation
Vector Rotate, Quaternion Inverse, Get Velocity, Get Rotation

[marble iron]

I'm so confused why you need all of that

[river tree]

quaternion inverse...

[marble iron]

💀

[river tree]

thanks Cryptic, been trying to do this for like 4 hours

[marble iron]

Damn

[hearty marten]

Rotate velocity by inverse of Input portal rotation

Rotate the above value by the output portal rotation (NOT THE INVERSE OF OUTPUT PORTAL, just its rotation)

[marble iron]

Mind explaining more in detail what all of this does

[hearty marten]

no, it just works

[marble iron]

💀

[hearty marten]

I dont understand the quaternions
they just work

[marble iron]

Man

[river tree]

after I rotate by the output portals rotation, how do I put that back into the player?

[hearty marten]

Velocity Set

[marble iron]

So basically you just know how to do it cause you did already ? But like you don't rly understand quaternions?

[hearty marten]

yeah

[marble iron]

Damn

[river tree]

but velocity set uses a float for speed right?

[hearty marten]

I understand how to use every quaternion chip
I just dont know what they do

[marble iron]

Do you know what vector3 rotate does exactly

Kinda confused on this one

[hearty marten]

All of them work on the same method

Direction Vector Magnitude * Speed

Have the speed be 1, and just plug in the normal vector

[river tree]

what?...

[hearty marten]

It rotates the vector by the input rotation
For example, (0,0,1) or global forward, rotated by the rotation of an object outputs the objects forward vector

[marble iron]

Ohhh

So it kinda set the vector direction as the rotation of the objecy

Object*

[hearty marten]

If you input (0,1,0) into Set Velocity with a speed of 5, the player moves 5m/s in the input direction
if you input (0,5,0) into Set Velocity with a speed of 1, the player mvoes 5m/s in the input direction

Direction Vector Magnitude * Speed

[hearty marten]

It rotates the vector by the rotation of the object

(0,1,0) rotated by object rotation is the objects up vector

[marble iron]

Yeah okay

[river tree]

by the way, by vector rotate do you guys mean "rotate vector"?

[marble iron]

But do you understand like why you need to do all these inverse rotation and stuff for the portal system

[hearty marten]

oh yeah forgot its called that

[river tree]

cause that's the only chip there is

[marble iron]

Oh it's not vector rotate?

[hearty marten]

yeah, Rotate Vector

is technically a quaternion chip, not a vector chip

[marble iron]

Hmm

[hearty marten]

thats why its in Circuits\Math\Quaternion not Circuits\Math\Vector

[marble iron]

Cryptic

Cause it just kinda confuse me why you gotta invert it and shit

[river tree]

it definitely says the chips aren't compatible. so it's a vector3

rotate vector can't connect to quaternion inverse

[marble iron]

It can

2nd input I think

[hearty marten]

Rotating a vector by the inverse of object rotation gets the vector relative to that object

For example, if you rotate the velocity of your hand, by the inverse of your hand rotation, the resulting vector3 will be the velocity of your hand relative to your hand

[hearty marten]

Rotate the vector by the inverse of the rotation

Dont inverse the rotate vector, as that doesnt make sense

[marble iron]

...

[river tree]

yeah I'm confused

[hearty marten]

dont worry about how it works lol

im not entirely sure

[river tree]

this is a fucking tonguetwister

[hearty marten]

I just know it does

[marble iron]

Think I got it

You mean you will get the velocity if the hand rotation was inverted right?

[hearty marten]

lemme link something one sec

[marble iron]

But then why'd you invert it, why don't you just rotate velocity by output portal rotation...

[hearty marten]

Rotate their hand velocity by the inverse of their hand rotation
The resulting vector3 is the hands velocity relative to the hand

Positive X = Velocity relative to palm direction left hand. Opposite of palm direction right hand
Positive Y = Velocity relative to thumb direction of left and right hand
Positive Z = Velocity relative to finger direction of left and right hand

Check if the Z velocity magnitude is greater than your threshold to detect if they are moving their hand forward

You can rotate this the vector by their rotation to make it relative to world space again

[marble iron]

My brain isn't braining

[hearty marten]

Because quaternions are funky

You know how anything multiplied by 0 is 0? not with quaternions

[marble iron]

Now wtf..

Quaternions just saying "no"

[hearty marten]

You know how multiplication order doesnt matter? It does with quaternions

[river tree]

ok no, I give up. I just can't understand what the fuck I'm supposed to do.

too many rotations for my tiny goblin mind to understand

[hearty marten]

A * B = Rotate A by B
B * A = Rotate B by A

[marble iron]

Man those quaternions

Who made these

Why is there even a W??!!!

Like

Useless bitch W

[hearty marten]

Get the rotation of the input portal (The one the player is entering)
Inverse that using Quaternion Inverse

Rotate the players velocity by this value ^^^ and save it into a vector3 variable

Rotate that vector3 variable by the rotation of the output portal (The one they are exiting)

[marble iron]

The only part i don't get is why tf do you have to rotate velocity by the inverse of in portal rotation

💀

[wise plank]

@hearty marten wait you're willing to do circuits for room earnings?

[hearty marten]

Entire rooms yeah

[river tree]

how do I use quaternion inverse on the rotation of the input portal? it's a vector3

[hearty marten]

The rotation of the input portal should be a quaternion

[wise plank]

oh epic ill keep that in mind

[marble iron]

Get first object with tag (portal tag) get rotation

[hearty marten]

You need the rotation of the portal, Get Rotation

Not the forward or up vector, those are different

[river tree]

alright, got that!

[marble iron]

Cryptic mind doing that drawing but just give what the result of the first step is

Like rotate velocity by inverse quaternions

[hearty marten]

The result is a value

i dont know what it is, i dont even know what inversing a quaternion does

I just know you need to do it

[marble iron]

No I mean

[hearty marten]

Heres a help

[marble iron]

Like with 1 portal only

What direction would the output be with first step

[hearty marten]

If you rotate (0,0,1) by an objects rotation, you get its forward vector
If you rotate an objects forward vector by the inverse of its rotation, you get (0,0,1)

[marble iron]

What...

Get the first one

Second one is

confusing

[hearty marten]

I dont know if this makes sense but

It would be the direction relative to global rotation

[worthy trellis]

I feel this..

[hearty marten]

Its the same thing but the other way around

[marble iron]

Where'd you come from 💀

[hearty marten]

holy shit stevy wtf

[marble iron]

But why the inverse of the rotation not just the rotation ?!

[hearty marten]

that was so fast

[hearty marten]

90 + 90 = 180
90 + -90 = 0

this but in 4 dimensions

[marble iron]

Wait are rotations based o' the pivot point or just

[hearty marten]

Pivot point of object yeah

[marble iron]

And now i'm lost again

Doesn't the pivot point rotate with the object

[hearty marten]

Yes

[marble iron]

Meaning that the rotation would never change...

[hearty marten]

Ok, if you want to "Unrotate" something, do you keep adding to it, or do you subtract?

You subtract

So think of it like this

You are adding a negative value, aka subtracting

[marble iron]

But if rotation is based off pivot point how is it even changing

[hearty marten]

Pivot point of object rotates and moves with object

[wise plank]

what %

[marble iron]

Like object rotate the same as the pivot point so the rotation doesn't change 💀

[hearty marten]

depends

was the entire game run on Cv2 (aka does the game not even function without Cv2)? 40% (Assuming its me and one person, I dont expect 40% when working with a team of people lol)
was it just a little section you needed but still everything? min 10%

[river tree]

the "blue" and "red" are vector components

it's still making me crash into the wall of the output portal

I'm facing the right way though

[marble iron]

Think he sais you need a delay

[river tree]

(don't mind that get rotation at the bottom)

[marble iron]

Or else it won't work

[river tree]

did they?

[marble iron]

3 frame

I think...

[hearty marten]

3 things:

• Do it 3 Cv2 ticks after (3 0 second delays, or like, just input 0.05 which most the time is 3 ticks)
• You might want to inverse the direction vector (scale by -1)
• Save velocity before entering setting position

[marble iron]

Also you need to save the vector3 before set transform

[hearty marten]

Also, you want to do the same thing for the player

To make sure they are facing the right direction, rotate their forward vector by the inverse of input portal rotation, then rotate that by output portal rotation

This is the direction they should face when exiting a portal

[marble iron]

Since he used a vector 3

Component

I don't think he need

It's always the right way...

[river tree]

cryptic is right

[marble iron]

Oh wait nvm

[river tree]

what if the player walks in backwards into the portal

[hearty marten]

Same thing

You come out facing the portal direction this way
You want to face the direction relative to the way you were facing the input portal

[marble iron]

Again I forgot yeah

Nvm

Nvm

[river tree]

I'm too tired to do this right now

[hearty marten]

im very glad you pinged me

I like quaternions

[marble iron]

💀

[hearty marten]

but also fuck quaterions

[marble iron]

Still don't get why you have to rotate by the inverse of it ! Lets go!!!

[hearty marten]

I mean yeah thats how quaterions by most the time

"Wow these things are so cool and so useful" followed by "God this shit is fuckin stupid"

[river tree]

one thing before I finish, which one is the direction vector?

the last one I do before connecting to the velocity set?

[river tree]

yeah ok

[hearty marten]

you could also invert that

same effect, same CPU, different order

(Dont invert both lol)

Its like an XOR

++ = Wrong
-+ = Correct
-- = Wrong
+- = Correct

[river tree]

hold on

[marble iron]

Are some people understanding quaternions?

[river tree]

I got a vector scale

[marble iron]

Like bucket man maybe?

[river tree]

how do I scale by -1 lol

[marble iron]

Parse int

[river tree]

thanks

[river tree]

oh god it works now

@hearty marten @marble iron thanks for the help, it took rubbing all 2 of my braincells together to get it working

for now it's just a one way portal but I'll just clone the circuits tomorrow, I wanna go to sleep with a win

[marble iron]

💯

[hearty marten]

you dont need to clone the portals

Just have an event that tells you which portal is entrance and which is exit

now you need 1 system for infinite portals lol

[river tree]

my brain can't handle this anymore cryp, could you tell me exactly what to do to make this work?

[hearty marten]

Instead of teleporting on trigger volume enter (I assume this is how you are doing it), send the portal event on trigger volume enter

When you enter Portal A, say portal A is input and portal B is output
When you enter Portal B, say portal B is input and portal A is output

Now when the event is received, you can teleport the player using that event instead of trigger volume enter

[marble iron]

And that's why you can't do it with vector component I think

[river tree]

Hey cryptic. The thing is, I don't know how to make A or B be the input or output deoending on which event is sent

That's just above my cv2 knowledge

[hearty marten]

Its one event with 2 object inputs

When you enter portal A, send the event with A as input and B as output

When you enter portal B, send the event with portal B as input and portal A as output

[river tree]

You understand this because you know how to use it. To me this sounds like nothing.
I haven't dabbled in event senders or event receivers, apart from using the casual bool event or 30hz update

I have no idea how to send an event with A as input and B as output or the other way around

Sorry

I'll just copy the circuits for the other way around

@marble iron did you understand how it worked? Maybe you could dumb it down for me.

[marble iron]

Yeah

Event definition with a property

(rr object property)

The in he portal 1 and 2 trigger send an event

With portal 1 in portal 2 and portal 2 in 1

Then event receiver on your system

💯

[hearty marten]

Use an Event Definition chip

This will define an event, you can configure it to add/remove ports and datatypes

In this case you want to add 2 ports

A Rec Room Object port named "Input Portal", and Rec Room Object portal named "Output Portal"

[river tree]

Hi @hearty marten, sorry to bother you again but do you think you know how I can make the portal face the player? Right now I have the portal set to surface normal but I want it to rotate on the ground like it did in the game.

Any idea if it's possible?

[hearty marten]

Vector Dot the surface normal of the surface you are placing the portal on by (0,1,0)

Use Quaternion Create Look

If the Vector Dot value is NOT 1 or -1, use Quaternion Create Look with Forward being the surface normal, and Upward being (0,1,0)
If the Vector Dot value IS 1 or -1, use Quaternion Create Look with Forward being the surface normal, and Upward being (Player Position - Hit Position) * (1,0,1)

Make sure the Forward vector of both portals points in the direction the portal is facing, and make sure the up vector points towards the top of the portal

@river tree

[river tree]

@hearty marten after all this, how do I get the 2 options into the rotation itself?

Events?

[hearty marten]

if value

[river tree]

Yeah, I put an IF value and connected the then and else to a vector3 variable and a quaternion variable to update, but how do I get the values into the set transform? I can't connect both to it

And I can't think of any other way to do it

Should I ping you when we talk @hearty marten ? Or just wait until you get back

[hearty marten]

both should be quats

[river tree]

Oh

[hearty marten]

.

[river tree]

I had forgotten to put a quaternion create look

[hearty marten]

And it turns out you dont just scale by -1 to get it correct

What you actually have to do is reflect the vector along the portals surface normal

[river tree]

@hearty marten for some reason the portals invert my direction now? I haven't changed anything.

I don't know if it's just rec room having a lil moment or if it's actually broken. would you happen to know why this could've happened?

[hearty marten]

I can get on again and check it out

[river tree]

alright, when are you free?

[hearty marten]

when airlink connects

[river tree]

I'll save my battery, @ me when you get on

[river tree]

oh my god I hate this

[hearty marten]

To clarify for newer users to the post the might get redirected here!

The direction you need to save into a variable should be the player forward rotated by the inverse of the input portal rotation

The direction you set the player to on exit should be the saved forward direction, rotated by the output portal rotation, reflected by the normal of the output portal
You can reflect a vector easilly using Pancake922's Vector Reflect invention!

[upbeat quarry]

can you show me a circuit example of this

im a bit confused