Hi, I am currently developing a 2 player

[stark spindle]

Normally your physics is handle only be the server.

[feral merlin]

soooooo how could I fix it😅

[stark spindle]

I don't know how photon handles network transforms though

[feral merlin]

oh ok

but thanks

[stark spindle]

If its client based then the player will have to apply the force to thier own rigidbody

[feral merlin]

thats what I do, the magnet works but I can't "detect" the Imput for the activation of the magnet

[stark spindle]

usually you use an RPC for something like that

[feral merlin]

what is that 😊

[stark spindle]

Remote Procedure Call. They should be in the photon docs somewhere

[dry haven]

@feral merlin https://doc.photonengine.com/pun/current/gameplay/rpcsandraiseevent

[feral merlin]

Ok I will try that, thanks a lot, I will come back if it didn't work 😄

[feral merlin]

like this?:https://gdl.space/itixogumoh.cs

@stark spindle , @dry haven

[dry haven]

Roughly, yeah. But that means each client is applying the force on their own locally. And that could lead to desync

[feral merlin]

how could I fix this?

I mean how do I have to change the code

add an if(!view.IsMine)?

but thanks for the help!

[dry haven]

I’ve never used Photon but most networking libraries have components called NetworkTransform and NetworkRigidbody to help you sync transform and rigidbody data.

I would assume Photon has something similar

[feral merlin]

oh i have added these

without them nothing works

so everything is fine?

It is calles photon transform view classic

and photon rigidbody 2d view

[dry haven]

Almost. From what I can tell you’re sending that RPC to everyone. Which means everyone is adding a force. Usually you only want the owner of the rigidbody to add the force.

Since the transform and rigidbody views will sync the force being added for you

[feral merlin]

ok so as the recipient I add ,,GameObject.FindGameObjectWithTag("Player2")?

or wait player2 is enough

[dry haven]

Who controls a players rigidbody and transform? The server or the client itself?

[feral merlin]

the client

i suppose 😅

but maybe I did something wrong

this is the line

view.RPC("ApplyMagnetForce", RpcTarget.Others, pullForce);

but I can't change it to view.RPC("ApplyMagnetForce", RpcTarget.player2, pullForce);

no that doesn't work

[dry haven]

I'm assuming player2 has a view attached to it?

[feral merlin]

yes

[dry haven]

view.RPC("ApplyForceToPlayer2", player2.GetComponent<PhotonView>().Owner, pullForce);

[feral merlin]

let me try that 😄

wooooooooow

no error👌

how do you know that

[dry haven]

Most Unity Networking Libraries use the same principles, just a matter of looking up the syntax

[feral merlin]

BRooooooo thank you really much it works perfectly 👍👍

I know that i annoy you but can you help me with one more little problem xD

[dry haven]

Also just as a recommendation, you may want to consider designing your script as "Magnet" instead of "MagnetP1".

This way you can reuse the script for every player.

[feral merlin]

I will 👍👍

[dry haven]

Sure

[feral merlin]

Okkk, wait a second I have to make a screen recording so you can understand

Ok, so I wanted to make the box colliders of both players ignore themselves so the players can walk "through" eachother. It works but when I do this there is the following bug:

this happenes when i start the magnet

so i tried the following

i wanted to make the magnet only work, when the players arent touching each other

(cause i think that should solve the problem)

and i used on collision enter and exit with the following script change

https://gdl.space/idafilopuw.cs

but in unity it says that the function is never used and the debug.log line always prints false

so I am doing something wrong 😅

[dry haven]

Collision and Trigger functions that are built in to Unity do not go inside of Update()

[feral merlin]

ohhhhh xD

thought i had to do it so it works with multiplayer or something like that

wait let me try

https://gdl.space/kanadixoci.cs

but it still always prints false

[dry haven]

You probably just want to do:

void OnCollisionEnter2D(Collision2D collision)
{
  if (!view.IsMine) return;
  
  if (collision.gameObject.tag == "Player2")
      touching = true;
}

void OnCollisionExit2D(Collision2D collision)
{
  if (!view.IsMine) return;

  if (collision.gameObject.tag == "Player2")
      touching = false;
}

Can you send me a picture of your collider on the player?

[feral merlin]

oh yeah

you mean in the inspector

[dry haven]

Yes

[stark spindle]

You'll also need to check how physics is handled in Photon. Sometimes only the host/server fires collision events

[feral merlin]

where can I check this

[dry haven]

How are you doing this?

[feral merlin]

I am using Physics2D.IgnoreLayerCollision(8, 9); in the start function of the player movement script of both players

8 and 9 are their layers

[dry haven]

If you do any ignoring, collision events won't fire

[feral merlin]

ok bro I am stupid 🤣

isnt there like a matrix menue

[dry haven]

Instead I would just set Is Trigger to true

And then you can use OnTriggerEnter

[feral merlin]

ohhhh ok

for both players?

[stark spindle]

there is a collision matrix but you don't want to mess with that either

[feral merlin]

oh ok😅

[dry haven]

Yeah, should work

Just one would also work

[stark spindle]

normally I will just check the Tag or the Layer in the Collision or Trigger event

[feral merlin]

wait let me look up how to use on trigger enter

[dry haven]

It's the same as OnCollisionEnter essentially

Except triggers allow for overlapping instead of hitting in to each other

[feral merlin]

void OnTriggerEnter2D(Collision2D collision)
 {
     if (!view.IsMine) return;

     if (collision.gameObject.tag == "Player2")
         touching = true;
 }

 void OnTriggerEnterExit2D(Collision2D collision)
 {
     if (!view.IsMine) return;

     if (collision.gameObject.tag == "Player2")
         touching = false;
 }```

like this?

there is the error OnTrigger2dEnter has an incorrect signature

[dry haven]

Collider2D is the parameter, not Collision2D

[feral merlin]

oh ok

now there isn't any warning enymoe 😄

but it is still collider2d collision right?

i mean "collision"

[dry haven]

That's just the name, can be whatever you want it to be

[feral merlin]

ohh

ok

wait i'll test it

oh

now it is falling through the ground because its a trigger

i ticket istrigger right?

[dry haven]

Ah yes, that'll happen lol

You may want to use two colliders in that case

[dry haven]

do this for the normal collider, and then use the other collider as a trigger

You might have to make the trigger collider on a child object of the players so you can perform the ignore by layer still

[feral merlin]

oh ok

ill just make it an empty child object right?

with the trigger

[dry haven]

Yeah, would work

[feral merlin]

and do I have to make any changes to the code

[dry haven]

I don't think OnTriggerEnter will fire in the parent's script, but you can see if it does

You may have to make a script on the child with OnTriggerEnter in it

[feral merlin]

no it works 😄

but it becomes true and then never goes to false again

oh wait

i did a mistake

[dry haven]

there's a typo here

[feral merlin]

Bro I don't know how to thank you 😄

thank you reeeeaaaly much

you can't imagine how much time I spent asking in forums until you replied

[dry haven]

🫡

[feral merlin]

xD

soooo if I face another problem some time could I maaaaaayybe ask again xDDDDDDDD

(I wont ask too much)

[dry haven]

Just ask again in the channel so this thread doesn't drag on beyond its original topic

[feral merlin]

thanks 🙂