⚛️┃physics

[stoic notch]

wallDetector

[timid dove]

I guess the next questionw ould be what's your code look like

[stoic notch]

scripts just have ontriggerenter and ontriggerexit

[timid dove]

try turning the scripts off

the trigger ones

for the moment

[stoic notch]

Im trying, but then I dont have the functionality to test it

I will try to figure out a way to turn off some of the script to still have it move

[timid dove]

share your code I guess? That doesn't look like a normal collision

[timid dove]

There's 3 scripts right?

[stoic notch]

yes

[timid dove]

I meant just the trigger scripts

[stoic notch]

2 triggers

[timid dove]

isn't the movement controlled by the main script only?

[stoic notch]

detects if it hits a ledge

yes

[timid dove]

oh i see

because it only happens when you turn

can you share the main script code?

[stoic notch]

and if its on the ground basically, so it doesnt need to turn around

[timid dove]

Please share it with a paste site

easier to copy and paste from than a screenshot

[stoic notch]

its a work in progress... im learning on my own... I basically wrote all this with no tutorials

and some internet searches

[timid dove]

yeah I'm pretty sure it's your code

[stoic notch]

yea?

What part would push it out like that?

[timid dove]

it's pretty convoluted so haard to tell exactly what's going wrong but... this could easily push you out:

        if (myLedgeDetector.turner == false && goLeft == false && goRight == true && goUp == false && goDown == false)
        {
            transform.position += transform.right * Time.deltaTime * speed;
        }```

[stoic notch]

wait.... I think I see it. its trying to turn around

[timid dove]

But basically - you should use Debug.Log

print which part of your code is actually running

like put a different log statement in each one of those if blocks

and watch it while you play

so you can tell wht's happening

[stoic notch]

gotcha.

[timid dove]

the fact that you're doing that scaling to turn the bug

instead of just rotating it

makes things really confusing i think

oh wait you are rotating it normally

with the walldetector thing

ok so yeah you're rotating it and then setting goUp = true

[stoic notch]

it is confusing. Thank you for the help. I think just talking it out with you helped me see parts that I did wrong

[timid dove]

except when you have turned - "up" is now to the right actually

because the bug is rotated

[stoic notch]

oooooo!

since it rotated up is not correct?

[timid dove]

transform.up < this points "up" according to the current rotation of the bug

if the bug is turned on its side

that is sideways

yeah

[stoic notch]

omg, wow that might have stumped me for a loooong time. Thank you so much!

[timid dove]

👍

alternatively - Vector3.up always points up according to the world.

if you need that

[stoic notch]

that will make it easier

thanks again

[timid dove]

mhmm

[stoic notch]

Vector3 up instant solve

[timid dove]

😮

[stoic notch]

is there a simpler way to get my enemy to go on each surface, rather than manually guessworking to place is the correct position with numbers?

ive gotten it to do what I want it to do.... will go around in a circle in either direction. but its incredibly difficult to get the catapillar to be in the correct position.

if you look at my code... I have transform.position.x - 0.43f... ect.

Im sure there is a much easier way to do this. Im kind of proud I did this on my own, minus @timid dove help!!

Seems like an ultra complex way to solve my problem

[supple sparrow]

People usually do some raycasts ahead of the entity, and get the normal vector on the hit point. Then you rotate to align to the normal.

At least for 3d. I guess you can get away with some hardcoded 4 directions for a 2d game

[steel pewter]

Not sure if this is a physics-specific question or not, because it might be a general Unity/C#/coding issue, but the code does have to do with physics.
I'm bypassing the built-in drag system and using my own, using a simplified version of the drag formula (drag = drag coefficient * velocity^2).

1. Get max velocity, max acceleration, and mass from the inspector
2. Max thrust = mass * max acceleration)
3. Drag coefficient = max thrust / max velocity^2 (so that drag will cancel out thrust at max velocity using the formula given above)

I'm getting a strange behavior now where the velocity keeps getting rounded down to 0 if less than 0.01. I'm not using any kind of rounding at all - my code adds the thrust as a force, and adds the drag as a separate force (calculated from velocity, as shown in the first paragraph), and those are the only two forces being added (there's also a torque from the rudder and an opposing torque, but those are Torques, not forces, and in the video the rudder is left at 0 so there's no torque in any case).

[timid dove]

share the code?

[steel pewter]

The comment about converting the angular velocity into radians/second is incorrect, but I can't change it here... doesn't affect the current issue, though.

[timid dove]

also what is so you're seeing - the velocity itself go to 0 before it should?

[steel pewter]

Yes. In the video I linked, I show the velocity snapping to 0 if the value drops below 0.01.

[timid dove]

it could just be the rigidbody falling asleep

See if adding this in Awake or Start helps:
rigidbody.sleepThreshold = 0.0f;

[steel pewter]

(note that this is inserted just after the line rigidBody = GetComponent<Rigidbody2D>();)
I'm looking up the sleepthreshold for 2d.

Setting the SleepMode to NeverSleep did fix the issue, though, so it's definitely that. I don't see anything about setting the threshold for 2D, though.

[timid dove]

oh sorry I didn't realize you were in 2d

yeah never sleep is what I wouldve suggested for 2d

[eternal thistle]

Sorry if this is a dumb question (quite new in unity): Whats the correct combination of colliders and rigidbodies if I have a player and a chair? I have boxcollider and rigidbody on player and boxcollider on the chair (so player cannot walk through chair), when I want to sit on the chair the player gets pushed away so what to do? remove boxcollider or rigidbody from player? remove boxcollider from chair? is there some trigger or function how to handle this?

also networking is a problem. i solved this "somehow" with removing the rigid and box-collider from the player but when I have multiplayer game the sync takes a bit for other players to remove box-collider from players and then the physics engine kicks in and if a player wants to sit on the chair he is sitting only on local computer but on other computers he and the chair are floating away because they collided and the force makes them float into space

[timid dove]

when the player sits in the chair you make one or both of the rigidbodies kinematic. probably the player

[timid dove]

as for networking - the "sit" action should be something like an RPC - and the clients can handle the actual nitty gritty of modifying rigidbodies etc.. themselves

[eternal thistle]

thank you sir! that seems to solve a lot

[timid dove]

Is there any reason you need more than one "height" for Colliders in the game? Couldn't this be solved by either putting the bullet's Collider on the floor or making every Collider in the game be at waist height like the bullets are?

[kind obsidian]

Cause I re-use the collider for the wall (which blocks the player's feet) for the bullet collision

in that case, I'd need two colliders, one at waist height, the other at floor height. Is there a way to neatly do this with tilemap colliders? The floor collider will not interact with the bullet, and I'll have the waist collider interactable with the bullet. But, I wonder if there's an easy way to do that (one way is I could make a script that duplicates the collider into a new gameobject and set it to a different collision layer, idk if it's considered hacky or okay)

[noble notch]

Working on a cuboro/marble run type thingy. What would be the best physics settings to use/increase/whatever?

Currently I got something that works pretty well

[kind obsidian]

And I think moving the bullet's collider to the floor might work. I will spend a long time thinking of other solutions in the meanwhile.

[wicked phoenix]

How would I be able to have a player move while standing on a moving rigidbody platform? Both objects have rigidbodies

I tried it with having no rigidbody on the platform, but when this happens, the player appears jittery when moving

[timid dove]

I think you could get away with just a single waist height Collider for everything. The player's waist would collide with part of the wall part of the way up. The feet would be just decorative

[kind obsidian]

Ah that might work. I'm gonna keep that as one of the possible solutions, but I won't rush into it. I'm gonna try think of edge-cases more.

[vocal trench]

What issues are you having?

[obsidian jacinth]

So I noticed that my when my player's rigidbody2d is touching another rigidbody2d that is dynamic and does not have a frozen y position constraint...the inspector displays my velocity.y as totally wild random positive and negative values both small and large.

This has no visible effect whatsoever and its unnoticeable unless you're checking your y velocity, but anyone know why this is happening and how I can stop it? If I do checks on my y velocity, these random values while touching dynamic rigidbodies messes stuff up.

[supple mason]

if you add a new PhysicMaterial to a scene, can you then not remove it in any way at all?

if i destroy a gameobject of class that has one, the PhysicMaterial gets left there, a google search suggests this is by design (https://issuetracker.unity3d.com/issues/physicmaterial-stays-in-memory-after-destroying-its-gameobject)

so if you cant use new PhysicMaterial() freely, how are you supposed to handle it?

[drowsy osprey]

Ping me on RR7 question as well. I wanna know the answer

[dire narwhal]

how do i add rigid body to a object

[zealous scaffold]

@dire narwhal type in "rigidbody"

Has anybody encountered an issue with Rigidbody constraints only properly apply when clicked in the inspector? My RB doesn't lock to it's parent until I click some part of the constraint in the inspector - I change the value back so that nothing has changed, but for some reason this is the only way RBs properly lock to their parents

[zealous scaffold]

Aand I figured it out

For future reference: if anybody has the issue where transform parenting is not working properly even though your child rigidbody is kinematic, you have to toggle the gameObject.active property of the child rigidbody's gameObject

[rugged geyser]

Hey team. Tested having 400 moving projectiles damaging characters. By removing rigid bodies, moving them by transform.translate , and using OnTriggerEnter for the trigger colliders, I got 3-4 extra fps Boost. Just FYI.

When compared to adding velocity to the rigid body and doing onCollisionEnter

And having rigid bodies on the projectiles

[violet flower]

I have a problem. My project is 2D with Bolt visual editing plug-in. Says the rigid body for the main player is too small, what am i doing wrong?

[supple mason]

what i've done so far, is create something like an objectpool but for physics material, i allocated 512 materials to it named 'InActive' and then when i grab one from the pool i name it active, when its returned to the pool its name inactive again. this has reduced the materials growth

however it also looks like this is not just limited to physics materials

for this to work you need some idea of how your materials are being consumed,

[true mason]

How can I remove the rigid body mass limit?

[timid dove]

what's the mass limit?

as far as I know it's not limited other than by the limits of float

[true mason]

The mass limit is 1e09.
I need to remove it for simulating (hopefully procedural) planets

[timid dove]

Where is that documented?

Would you be better off just scaling everything down for your simulation? Or not using Rigidbodies at all?

Scaling down I think would make sense because it's unlikely you'll need physics interactions between planets and regular human-scale objects that need to be realistic. For example you wouldn't need to simulate the force that a landing spaceship applies to the planet that it lands on typically

So you could put the gravitational interactions between planets etc.. in a whole separate physics sim (which may or may not be using Rigidbodies/PhysX)

and if you need normal objects to interact with them - you can essentially treat them as kinematic from that perspective

[true mason]

I decided to use physx, but how can I use it?(Edit: my laptop can't handle that)

[spare nexus]

I have an issue in unity version 2019.4.5. The issue is my character who has a character controller component on it not a rigidbody. My issue is this: I want to teleport the player from point A to point B. However when i use OnTriggerEnter() the code player.transform.position = newLocation.transform.positiin;
This code does not fire. I put a debug in there and it shows up whenever I enter the warp entrance. However the code to move the players position stays the same. I have been trying to find a fix for this for weeks and can't find any solution. I hope someone here can help. When my game starts and I am on the ground my y direction is contently going down too even when I'm grounded. Unsure if that's related to the problem or not. But if it was the debug.log wouldn't fire but it does. I am banging my head here on how to fix this. I hope someone can help

[timid dove]

you don't use physx directly it's how Unity's standard physics works under the hood. But if you want to explore doing separate physics sims for the planets you can look here: https://learn.unity.com/tutorial/multi-scene-physics

[fleet island]

I've been messing with cloth... making a collision mesh for cloth: using the conics / sphere pairs...

Is there a limit on how big i can make them and how far i can move them from the cloth component, i'd like to see about 'faking' planar surfaces using a few pairs of conics... but they'd need to get huge and be moved quite far in order to do this...

[supple sparrow]

You're not supposed to be able to use forces AND setting position at the same time, these 2 approaches are conflicting and thus mutually exclusive to each other.
Try setting the rigidbody to kinematic before teleporting it? Toggle it back on after tp-ing. That's for objects at a stop. If you know it will be moving when teleporting, you would have to store the rigidbody velocity first (and probs angular velocity 🤔 ) before switching to kinematic, and restoring back after the tp-ing

Damn it you wrote you DON'T have a rb, I misread that. Well forget what I said ^^

Use the CC.Move() metho ?

method*

Thinking twice about it, it won't teleport with the CC move function xD Sorry I obviously lack some sleep. I never used Unity CharacterController, but I'd try the same strategy than the rigidbody though. Disable the CC, set new position, toggle back the CC

[acoustic peak]

Collider2D doesn't have any contacts... It's marked as trigger and has a RigidBody2D (kinematic) attached. It's supposed to be colliding with another Collider2D, this one not marked as trigger. I tested putting them in the same layer/putting both on trigger and nothing

[timid dove]

If you have a CharacterController on your player, then setting hte transform position will not work

You need to disable the CC, then move the position, then re-enable the CC again

[timid dove]

trigger colliders will only get Trigger messages

not collisions

[acoustic peak]

??

i mean contacts

on runtime

[timid dove]

they won't get contacts either

they are just triggers

[acoustic peak]

but

[timid dove]

what do you mean by having contacts anyway? How are you trying to detect this collision?

[acoustic peak]

contacts

as in seeing the contacts tab under info in the collider component

[acoustic peak]

OnTriggerEnter2D(Collider2D col)

[timid dove]

ok so:
Both objects have 2D colliders?
At least one collider is marked as a trigger?
At least one of them has Rigidbody2D? (not normal Rigidbody)?

and how are you moving them?

[acoustic peak]

yes
yes
yes

through scripts

through transform.position

[timid dove]

which one are you moving

[acoustic peak]

the one that's marked as trigger and has the rb2d

[timid dove]

Can you share your ONTriggerEnter2D code? How do you know it's not running?

Also - you said they're on the same layer - have you played with the layer collision matrix at all?

[acoustic peak]

well it doesnt work and im not testing it that way

i was testing by stopping the movement script then moving them manually on top of the other object

then seeing the contacts on the collider component

but it said no contacts

[acoustic peak]

same layer, different order

[timid dove]

order?

[acoustic peak]

order in layer

[timid dove]

Are you talking about physics layers or sprite rendering layers?

Because those are different things

[acoustic peak]

sprite render

[timid dove]

yeah that's not relevant here

[acoustic peak]

oh

k

[timid dove]

what matters is the layer of the GameObject itself

int he top right of the inspector

[acoustic peak]

the one at the top

oh

like UI and everything

yeah they are on the same

[timid dove]

yeah

ok and you haven't played with the collision matrix in Project settings?

[acoustic peak]

"Default"

nop

[timid dove]

can you share your code?

[acoustic peak]

i looked at it

[timid dove]

as long as the Default/Default box is checked you should be good

[acoustic peak]

btw should i run the ontrigger enter on the object marked as trigger or on the other one?

[timid dove]

either one works

whatever makes sense for you

[acoustic peak]

k

public void OnTriggerEnter2D(Collider2D other) {
    DestroyServerRpc();
}

yes im working with multiplayer as well

[acoustic peak]

it is

[timid dove]

How do you know it's not running?

[acoustic peak]

well

[timid dove]

Did you try putting Debug.Log in it?

[acoustic peak]

destroyserverrpc() is not working

and yes i put debug,log in it

though im not sure it'd run either way

but

its not appearing in contacts

and it should

[timid dove]

ok some more potentially dumb questions:

• Is this OnTriggerEnter2D code in the right place? Is it on a script that is attached to one of the objects with the colliders or the Rigidbody2D?
• Is the function inside another function by accident?

[acoustic peak]

should be on the right place

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using MLAPI;
using MLAPI.Messaging;
public class Projectile : NetworkBehaviour
{
    bool isNetworked = false;
    public override void NetworkStart()
    {
        isNetworked = true;
    }
    void FixedUpdate()
    {
        if (!isNetworked) return;
        transform.position += transform.right * 0.25f;
    }
    public void OnTriggerEnter2D(Collider2D other)
    {
        DestroyServerRpc();
    }
    [ServerRpc]
    void DestroyServerRpc()
    {
        gameObject.GetComponent<NetworkObject>().Despawn();
    }
}

full code

yes i removed the debug.log

[timid dove]

the code itself looks ok (notwithstanding any networking stuff I'm not familiar with MLAPI)

[acoustic peak]

btw these are both prefabs

and instantiated

through mlapi

[timid dove]

mhmm

[acoustic peak]

but instantiated either way

[timid dove]

and where's the script live?

[acoustic peak]

?

[acoustic peak]

this has more components

Projectile (Script)

is

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using MLAPI;
using MLAPI.Messaging;
public class Projectile : NetworkBehaviour
{
    bool isNetworked = false;
    public override void NetworkStart()
    {
        isNetworked = true;
    }
    void FixedUpdate()
    {
        if (!isNetworked) return;
        transform.position += transform.right * 0.25f;
    }
    public void OnTriggerEnter2D(Collider2D other)
    {
        DestroyServerRpc();
    }
    [ServerRpc]
    void DestroyServerRpc()
    {
        gameObject.GetComponent<NetworkObject>().Despawn();
    }
}

nvm i fixed it

[tight shard]

Someone have good tutorial for using character joints ?

[vestal shore]

Is there any workaround for this to where I can have both mesh colliders and physics on my character gameobject?

I've tried to use a mesh collider and a rigidbody on the same object yet the mesh collider doesnt seem to work. I cant make the rigidbody kinematic as I want it to be dynamic physics

[river cape]

Unity only support convex mesh on dynamic rigidbodies.

If you have object with fancy shape you can add many primitive colliders in the children's.

[supple sparrow]

Code looks good, but you can't add forces to kinematic bodies (that's the point of having them kinematic, not compute forces)

[sacred parcel]

Help me with this, anyone?

[timid dove]

what's the problem?

[sacred parcel]

What's not the problem.

I can't make a simple low-poly ragdoll.

This...thing happens.

;-;

[timid dove]

IDK? You're asuming I know what this is supposed to look like

[sacred parcel]

.

[timid dove]

Looks like your model is not rigged properly

[sacred parcel]

I can send you the Blend file if you want.

[timid dove]

I don't want that

But if you have questions about rigging 3D characters the correct place is #🔀┃art-asset-workflow

[sacred parcel]

I thought ragdolls comes in physics?

[timid dove]

yes but the actual appearance of the ragdoll is very much a #🔀┃art-asset-workflow thing

if you want to show the colliders/joints of this thing not working properly - that could be a physics question. But the appearance of the skinned mesh itself is art

[sacred parcel]

Okay, thanks.

:'(

[muted kernel]

so I'm trying to move a platform up continuously using a character controller, but the platform goes out of wack whenever my player lands on it (i assume because of gravity pushing the player, and therefore the platform, downwards). how can I continuously move a platform up, regardless of forces being applied to objects on top of it?

[timid dove]

CharacterController is intended for characters that need to bump into and stop when they hit obstacles

you just want your platform to move continuously right?

[muted kernel]

yes thats right

[timid dove]

I recommend removing the characterController and just using a Kinematic Rigidbody. You can move it either with Rigidbody.MovePosition inside FixedUpdate or by directly modifying the Transform position in Update

[muted kernel]

ok, ill try that and come back

that seems to have worked, thanks @timid dove

[sacred parcel]

https://cdn.discordapp.com/attachments/608989539251519500/846791761644617848/2021-05-25_22-16-50.mp4

Sorry for the poorly recorded video, but why does my ragdoll do that? And why is he floating so much?

[mighty sluice]

does anyone know how unity applies gravity?

like... does it actually inject forces in the solver, or does it modify velocity directly?

[mighty sluice]

https://i.imgur.com/blfC2r1.mp4

adding the right acceleration per fixed update to velocity seems to work

https://i.imgur.com/By3VM1k.mp4

[summer drum]

Thought this would go in physics:

Hey guys, I set up a soft-body like mesh using spring joints, (a joint in each corner of the cube)

My issue is that when I raise 1 corner up using the arrows in editor mode (while playing), I want the cube to just droop down like gravity is applying to it.

What instead happens is the bottom left, not the bottom right:

(Top figure: a cube with spring joints at each corner)
(Bottom 2 figures: left is what happens when I drag a corner up, the right is what I want it to do)

[mighty sluice]

each spring joint needs to be on a rigid body, and anchor to another rigidbody

if you connect every corner to every adjacent corner, that means 1 spring joint for every pair of adjacent forners

you might encounter stablity issues

[summer drum]

That's how I have done it

Each corner gameObject has a rigidbody, and about 3 spring joints

1 for adjacent corner (laterally), 1 for adjacent (horizontally), and 1 for across

The springy part itself works. If I drag a corner away, it tries to bounce back, and the other corners try to come to it

Issue is: when I raise a corner, the whole cube itself still keeps its upright cube form. I want the cube to just droop down (like bottom-right figure)

[mighty sluice]

now just remove half of them

cause a spring joint is a two way connection

[summer drum]

So upon a grab action, the other corners should lose their connection, and that'll do it something like I desire? I'll give it a go

[mighty sluice]

no

you have twice as many spring joints as you need

[summer drum]

Which ones do I remove. Since each corner has a connection to 3 others. Idk how to divide that by 2

[mighty sluice]

i didnt draw all the connections but i think you get the idea

every RB should have at least one, and some of them should have 2

[summer drum]

I removed the connection I had in each rb that connected to an across.

So my connections now look like yours

but which ones only have 1, versus 2?

[mighty sluice]

it's depicted in the image

any node with two arrows coming from it

[summer drum]

Where did you know about this specific set up?

Like this is new to me that this is a thing

[mighty sluice]

i know how joints work well, and while i wouldnt try this sort of thing myself very lightly (for stability reasons), this is the way to do it if you're gonna

almost nobody knows how to use joints well lol

if you can get this working it's a miracle

[summer drum]

yeah, Unity's joints are finicky
Thank you for the info, I'll attempt this rn

[mighty sluice]

if spring joints wont work, consider using configurable joints instead

they have a 3DOF linear spring /w drives

[summer drum]

Ah, gotcha. I'll experiment with them as well

[summer drum]

@mighty sluiceThe first method worked.

Limiting the springs to just a few allowed for more movement in the bones

And you're right - the behaviour is funny to say the least

But I can work with this for now, I'll have time to experiment with other joints after

Thanks!

[mighty sluice]

welcome

[supple sparrow]

1961: Youri Gagarine first human to journey in space
2021: First centipede to journey in space 🤩

[mighty sluice]

finally science is tackling the stuff that matters!

[supple sparrow]

How does the pathfinding work on these ones ? do they cast a ray through the sphere and the you project on the sphere ?

then*

[mighty sluice]

lol...

they have no pathfinding

[supple sparrow]

I assumed the cube thingy was food

[mighty sluice]

i am feeding them a direction that tells them the relative dir to the cube

it's a bit simple, but it works as a placeholder

normally i have my agents navigate based on diffused smell but i need to re-work my smell system

[supple sparrow]

relative dir on the 3d space ?

[mighty sluice]

there is no hard logic telling them where to go though

yea in 3d space. relative dir from head to target

[supple sparrow]

ALright I see :p

[mighty sluice]

it's just a place holder and convenience for making sure they can derive a direction to try and maintain

for now their motor control innards are much more important

they do get rewarded for the "food"

[stuck bay]

Hey, i created a 3D room consisting of 4 walls (planes) on each side and im using a charactercontroller to detect collision but for some reason the walls on the left and right dont get detected and the ones in front and behind work perfectly fine
https://gyazo.com/a12bc6f981b3d3620ab41bfb666aa9d4

the walls are all the exact same i think something is wrong with the contact points of the capsule charactercontroller but im still new to this so i can't really tell can someone help me out/elaborate why this is not working

[sacred parcel]

How to balance my ragdoll in Unity?

[round hinge]

There r lots of tutorials in Youtube. have you tried them ?

[sacred parcel]

Thing is, there are so many, I am kinda confused.

One thing: I am a TOTAL noob in programming.

So I want a tutorial which explains what it is doing.

[round hinge]

youtube puts the most relevent on the top. that toppest video should be the best

[sacred parcel]

Okay!

[round hinge]

anyways...

I recently faced a really challanging physics problem, where I need to limit the physics of a certain rigidbody to only X and Z. there is already an option in Unity for that, but I found out that it Does take y into account! which is weird... any idea how to do it manually ?

to illustrate the problem, imagine in this picture that up is Y and right is X axis. in this scenario that i drew, the collider hits the curved wall and rotates back when all axicies are allowed

in 3D , the length stays the same

when limited to X & Z though, the length becomes less

the length is the velocity in which the object is moving with.

this is one problem

there's this too :

when we have highly curved wall, the object would reflect forward and not change it's X axis in a 3D physics

but when limiting to only X & Z in Unity, the object wouldn't reflect on X! it would just keep it's 3D result and zeroes out the Y axis

This is the ideal result I'm looking for ( the green is the reflect)

[round hinge]

I'll show it all in a video if my explanations wasn't enough

[vivid salmon]

Hey guys! I'm procedurally generating a track mesh and I'm using this mesh as mesh collider, but when a rigidbody with a simple box collider slides in this mesh collider, it hits the edges of the mesh. No vertex position is being duplicated so there's no gap between each segment of the track, so I don't know what's causing this. Also, my rigidbody has Continuous Speculative collision detection because the gameplay is a bit fast so it clips a lot through the mesh without it.

[foggy rapids]

friction in the materials

[vivid salmon]

There's no friction in the default physics material I've created

[foggy rapids]

default physics material has friction

[vivid salmon]

I created another physics material to use as default, without friction

[foggy rapids]

are you using it on both objects

[vivid salmon]

yea, I don't think that the issue is the friction, I see a bunch of other people asking on forums about that, but none of then resolves my issue

there's something to do with the mesh collider itself, I tried to weld the vertices, change physics settings but nothing works

[timid dove]

Have you considered using the 2D physics engine instead?

[mighty sluice]

@lapis plaza Hey dude! Thanks very much for pointing me to your ModifiableContactPair example git, it was very useful.

https://i.imgur.com/NaTdNum.mp4

I have got a primitive first attempt working, but it's far from perfect and appers to drift anomalously to the left

I need to improve the math im using to get a friction co-efficient

[timid dove]

Your problem may also be helped by the modifiable contact pair API that @mighty sluice is referring to

I think it may be experimental still though. But I was having problems with that issue even back in Unity 5 days

[mighty sluice]

tracking the movement of a given contact point isthe hard part

a given contact is a unique per-frame thing, so technically there are no persistent contacts

and since i need the movement of a contact point relative relative to the surface of the collider, it's even more cumbersome

[vivid salmon]

@timid dove This seens interesting, but how stable it is? Is it mobile ready?

[timid dove]

¯_(ツ)_/¯

[round hinge]

This is a 3D game. This collider needs to hit 3D colliders. Is it possible to put a 2D physics inside a 3D physics?

If so, I can't wait to see how it works :D

[untold sand]

the door kinda rotates sideways, which is not what I want.

[true mason]

I created a gravity system, but my rb fall asleep, how can I do?

it is kinematic

[timid dove]

If it's kinematic does it matter that it fell asleep?

[supple sparrow]

Only if in contact with a static collider, could not wake up 🤷‍♂️

[real wave]

literally what im trying to do rn

how could i get this to stick to the foot movement in an animation, but keep the foot placement? Its a stupid question i know but i dont have that much experience.

[sacred parcel]

@real wave Same.

[real wave]

got any solution thus far?

[sacred parcel]

Inverse Kinematics.

But first, I'll try some animations.

So learning that at first.

[real wave]

Thats what im doing

[real wave]

Try brackeys video on animation its pretty understandable

[sacred parcel]

@real wave Can you link me?

?

[sacred parcel]

Can you send the link? IDK which tutorial you are talking about.

[real wave]

Sorry was gone for a while. I meant the animation rigging one.

[sacred parcel]

Can you send me a link?

Please?

[real wave]

aight

[real wave]

https://www.youtube.com/watch?v=Htl7ysv10Qs

[sacred parcel]

Huh.

Have you tried it?

Does this help?

[noble nimbus]

Hello, I need some help with the WheelCollider.

How can I stop completely and instantly a car formed by wheel colliders? For instance, I want this for respawning the car.

[distant coyote]

a car with Wheel Colliders would typically have a Rigidbody at the top most level

(an RB that teh wheel colliders are attached to)

you'll want to set that RB's position, rotaiton, velocity, and angular velocity to zero

[noble nimbus]

Yup, I got it

[noble nimbus]

Gonna try it! Thank you very much for your response

[distant coyote]

you might want to set all wheelcollider motor torque's to zero

then enable/disable the whole gameobject too - i believe that actually nulls out any velocity wheel colliders have

[noble nimbus]

Okay! I will do this if the previous doesn't work

[noble nimbus]

Isn't it a bit sketchy though? heheh. Anyways, I will let you know! Ty a lot

[distant coyote]

you could disable individual colliders, and I don't think you have to do it over multiple frames either

just flick off flick on

user will never see it

no more tacky than "Respawning" 😛

[noble nimbus]

hahahah

💯

well

xd

Just by adding this: ```csharp
if(Input.GetKey(KeyCode.B))
{
rigidbody.velocity = new Vector3(0.0f, 0.0f, 0.0f);
Debug.Log("STOP");
}

it stops instantly, which is what I want. Then I can drive the car again accordingly

Many, many thanks!

[gleaming gorge]

So, my character is using character controller for moving around, then I add hinge jointed doors to the level.
To make the character interact(push) the door I initially used oncollision and addforce to push the door away from the char, it kind of works but the character can actually push the door out of it's hinge especially when the door is at it's angular limit.
So, I googled for solution and found that instead of using addforce and oncollision, I should add a capsule collider. It almost work, but the character still can 'break' the door by pushing it beyond it's limit.

Question is, is there any workaround this problem without having to change from character controller to rigidbody?

[timid dove]

This was designed for that: https://docs.unity3d.com/ScriptReference/CharacterController.OnControllerColliderHit.html

the example code there is relevant to your use case as well

[gleaming gorge]

Yes, this is what I use on my initial attempt, I was using oncontrollercolliderhit to push the door out of the way, before.
But that said, I might give it another shot (just figured that I can check hingejoint angle, and void the push if the angle is at/over the limit)

[timid dove]

yeah it wont magically fix your hinge issue. That's a tricky one

[gleaming gorge]

Yeah, maybe I shouldnt use charactercontroller in the first place 😅 , but it's far too late now...

[round hinge]

Hey. If the problem still exists.
Try limiting it's rotation and position through an script

In Fixed Update

[gleaming gorge]

🤔 I havent try that, might worth the shot

[true mason]

how can I get two kinematics rigidbody collide?

[timid dove]

You can only get them to do OnTriggerEnter

they will not do OnCollisionEnter

[timid dove]

Note the empty spot here:

kinematic rigidbody will only collide with dynamic (non-kinematic) rigidbody

[true mason]

ok

[timid dove]

But if you see here it will work if at least one of them is as trigger collider, with OnTriggerEnter

[tranquil hawk]

Hi guys, I am moving this ball with torque ... I'm not sure how to keep the max angular velocity large while preserving the player's ability to change it quickly

It seems like when I make the ball allowed to move faster, I lose the ability to control it as well

And I can't stop the ball when it's going down a hill, or make it go up a hill either

This is the script FWIW but I think it's mostly a conceptual question https://pastebin.com/ZGP76LK4

[tranquil hawk]

How do you find an object's angular velocity towards a particular direction?

[mighty sluice]

transform.InverseTransformDirection(rb.angularVelocity);

then read the axis you want

that would be relative to the object

just take angularVelocity for worldspace tumbling

[timid dove]

I mean this is basically a question of momentum vs force. The larger the momentum, the higher the force required to cancel it out

momentum is velocity * mass - or
In angular terms it's angularVelocity * inertiaTensor and force is torque instead

so as angularVelocity goes up, so does the torque required to stop it

so either - provide more torque or reduce the intertia tensor of the object (which can be done by reducing its diameter or mass)

[tranquil hawk]

thanks guys

[tranquil hawk]

@timid dove I'm still kinda having a hard time with it. I just want the spinning to be converted to movement more easily. I tried lowering the mass but it doesnt seem to change it

Maybe I just need to give the torque an extra boost, proportional to the current velocity in that direction

[viral ginkgo]

@tranquil hawk increase friction of the ball

no need for linear forces

you want it to have better grip? or you are happy with drifting?

[tranquil hawk]

i just kinda want to try out some different setups to decide ... i will try that, i don't have any physics material on it right now

[viral ginkgo]

@tranquil hawk you can also do a little trick to kick up the friction even further

by applying force on reverse collision normal

it might stick and climb walls tho

[tranquil hawk]

gotcha

Thanks the friction makes it a lot better

I don't suppose there's a way to do air control ?

[viral ginkgo]

@tranquil hawk if you dont want to do linear force

you can have little bit of linear force if its mid air maybe

[real wave]

Physiccs

[tranquil hawk]

Any tip for how to get this bike to always be looking the correct direction? Currently I have replacementObject.transform.rotation = Quaternion.Euler(0,rigid.velocity.normalized.y * 360,0);

[tranquil hawk]

Hmm maybe just sample positions from collision/raycast and subtract them to calculate the direction myself?

[drowsy dawn]

Why do some collisions bounce off each other and some collisions act like magnets and you stick to the object? Video here: https://youtu.be/WQEbY6ntzgo

[tranquil hawk]

It works 🕺 wheeee

[tranquil hawk]

@drowsy dawn are you sure it's the colliders causing that? If you turn them off it doesn't happen?

[drowsy dawn]

If I turn colliders off, I fly through stuff

This was a bug I always had in my non DOTS stuff

But I found the bug in DOTS too...

I thought people experienced this themselves and it wasn't just me

Ok, I'll try and fix it if no one is familiar with this UNITY physics bug...

[waxen edge]

Not able to watch the Video atm, but that sounds like Physics Materials

[spiral moon]

helllo

how I make metabal in unity

like this efect but with obect of unity

[winter plank]

is there a possible way to make my collider in real time

[frigid pier]

Yes. You add one of the default shapes through code or create a mesh for one.

[spiral moon]

no one?

[proud escarp]

Shader graph

[spiral moon]

how

[proud escarp]

i dont really understand what you mean, could you explain it more

[spiral moon]

is not a physic work like to make it liquid

?

[proud escarp]

but i think shader graph will help

[proud escarp]

ok you mean liquids

i forgot i was in physics page

[spiral moon]

look the picture, How can I make a MetaBall efect such as slime ball as you can see this blue ball when interacts with other one like it the ball start to melt with the other one, like slime you see?

[spiral moon]

look above

[proud escarp]

Add soft body to them in blender

But i am not sure if it will work in unity

[spiral moon]

:u

[proud escarp]

if it does not work check out this tutorial

https://youtu.be/Kwh4TkQqqf8

[spiral moon]

uhhhh

[proud escarp]

This video will teach you how to make it using a c# script in unity

[spiral moon]

but..

[proud escarp]

good bye

i cant talk with you anymore

sorry for that

[spiral moon]

yes but the slime style is working nice, but I mean the Melted style look

[viral ginkgo]

metaball should have nothing to do with physics

i think the balls just radiate some kind of potential field

[spiral moon]

https://www.youtube.com/watch?v=kuLUqNNlN4g

like this

[viral ginkgo]

and if the potential is bigger than some value at and frag, you draw the pixel

[spiral moon]

is fake

[stuck bay]

i tought a mesh collider used the mesh as a colider

but i guess not

how can i make a collider like that? i have to add a bunch of coliders to make a custom one? or what ? this sucks i wasnt expecting it to be perfect but bruh

😪 the convex option is only for objecs with rigidbody so for the hoop the collider works exactly as i wanted its just not visible

im tired

[sacred parcel]

How to make my character move using animations and IK, and when a force is applied on it, say, it being run over by a car, it turns into an active ragdoll, and gets up by itself?

I really need help because apart from creating ragdoll using Unity's ragdoll builder, I know almost nothing.

(Please ping me if you find the answer.)

[polar leaf]

@sacred parcel that's a complicated problem. There is an asset for that on the asset store called Puppermaster. Not sure exactly what it works but AFAIK, it applies forces to the ragdoll so it follows the animations.

I have a basic question. What is the difference in pratical terms between ForceMode Impulse and ForceMode Force?

[sacred parcel]

But it's pricey.

[polar leaf]

It is. The way I think is, I'm not sure exactly how complex it is to build a system like this, but I'm pretty sure my pseudo-hourly rate multiplied by the time it will take me to build it will be much more expensive 😆

[sweet snow]

Impulse is "instant", as if someone slapped it. Force is assumed to happen over 1 second, like a car accelerating.

[sacred parcel]

D:

[polar leaf]

Thanks!

[rancid kayak]

Can someone who's knowledgable with 2D collisions and rigidbody2D help me out? I'm trying to program hitboxes but sometimes collisions are not going through. (I can explain more in DM)

[golden raptor]

I think explaining here is totally fine. sharing knowledge is a key feature if this channels @rancid kayak

if a collision is not "detected", that usually means some collision is turned off or you are using the wrong callback (which I recently confused myself)

[rancid kayak]

Okay, then I'll try to explain my situation. Just give me a moment to get all the notes together (just came back from a hike, and I have an outline of the issue)

So, I'm trying to program hitboxes in my 2d action game. These hitboxes are created at runtime and have their own layer. Where the issue arises is in setting up Rigidbody2Ds for the objects that use these hitboxes. And yes, these hitboxes' colliders have the isTrigger setting checked, and I'm using "OnTriggerEnter2D" for the scripts. (for clarity, the hitboxes are child objects each with a box collider) The way collisions are measured is that the hitboxes exist at runtime, and I just turn on/off their colliders when necessary. If neither the player controller or the enemy object have a rigidbody2d, collisions with a hitbox do not work, period. If the enemy has a rigidbody2D but not the player, then the player's hitboxes cause a trigger event when colliding with the object when the collider is turned on via inspector and via code. The enemy's hitboxes cause collision events on the player in a similar manner, except only when the collider is turned on via the inspector, not through code. If both have rigidbody2Ds, collisions seem to work, but very inconsistently when called through code (Debug.Log checks have shown me that sometimes it's like a collision doesn't even occur unless the objects move out of and back in range, which obviously isn't the behavior I want). They do seem to work when turned on via inspector, however. I don't know why there would be a difference when the hitbox's collider2D is turned on via the inspector vs when it's turned on via code.

This whole scenario makes me believe this has something more to do with me not understanding or knowing a certain aspect of Unity's collision/trigger system and how it works with rigidbodies. Can anyone give me any insight here?

Another interesting thing: for the last case, the hitbox trigger event does go off consistently if the parent object is already overlapping the other actor (enemy or player). Obviously, this will not work because I want to be able to have disjointed hitboxes ... and this just confuses me further on how collisions and rigidbodies work.

[golden raptor]

If neither the player controller or the enemy object have a rigidbody2d, collisions with a hitbox do not work, period
No idea, I used colliders without rigidbodies and it works. period. Colliders collide, not rigidbodies.

did you check what happens if you move the colliders around with the gizmos while the game runs?

[rancid kayak]

the only concern I have on that front is that someone else is working on the movement for the game, and last I checked they're using rigidbody2D for the player. So I have to account for that.

[golden raptor]

RigidBody is just there to enable physics processing, iirc.

gravity and such

[rancid kayak]

tried moving around with the gizmos, same behavior.

And you say that ...the collider has an input for a rigidbody.

[golden raptor]

"Attached body".

not an "Input".

it should be readonly, so nothing of concern

anyway, I remember having a Z problem when I messed with 2D.

somehow my colliders didn't collide because I unknowingly changed the Z value of one of the objects

[rancid kayak]

seems like all of the objects on my end keep a Z of 0

[golden raptor]

🤔 Then I am at the point where I would need to get hands on the code and check... I am not deep enough into it to take good guesses 🤷‍♂️

[timid dove]

You should read this whole article, and especially the tables at the bottom of it
https://docs.unity3d.com/Manual/CollidersOverview.html

[rancid kayak]

So, static trigger colliders (like my hitboxes) simply don't collide with rigidbody colliders (like the enemies or player)?

wait

Does that mean colliders don't work properly when the object is scaled differently?

and instead I need to adjust the size of the collider componentitself?

[rancid kayak]

I read that, but I'm not sure if it's helped any. If anything, based on what I saw on the tables this should be working.

[limpid hornet]

Since we are on the topic of colliders and triggers, I have a problem that I don't quite know how to address.

-- Projectile GameObject
    <RigidBody2D>
    <ScriptWithTriggerHandling>
    -- GameObject
        <SpriteRenderer>
        <CircleCollider2D>

I have a hierarchy set up like this. The Rigidbody in the parent object has collision detection set to Continuous. The CircleCollider in the child object is a trigger. The script in the parent object handles OnTriggerEnter2D().

My problem is that the projectile will sometimes go through an object and not call OnTriggerEnter. Sometimes it will enter another collider and only call OnTriggerEnter when it exits that collider. Other times it works as it should.

After playing around it seems like putting the collider on the parent object makes it always work. So the Rigidbody2D having continuous collision detection doesn't apply to child colliders.

Is this supposed to work this way? The child object will be changed at runtime so I'm trying to keep as much as possible in the parent so I don't have to copy/paste code a bunch of times for all the possible children.

[limpid hornet]

Well ignore that wall of text because even after rearranging everything so the collider and rigidbody are on the same object and detection is continuous Unity seems happy to just completely ignore collisions half the time.

[golden raptor]

I feel like I have to play with 2D a bit and check what you guys are on about... I don't had any issues with 3D colliders, I made a few scripts and prefabs for bullets using nearly the same approach.

[hollow void]

How do i make sure that all of my jumps are consistent?

I have a little TPP (Third person Perspective) Character controller but the jumps are really inconsistent.

[viral ginkgo]

@hollow void jump in Update, use Input.GetKeyDown
don't use any delta time

[hollow void]

thanks

i ll see if that helps

Thanks it fixed

i was doing the jump using smooth delta time

🙂

[digital dust]

Is it possible to someway make an object with trigger collider avoid going through walls?

[vagrant helm]

I have added dynamic bones to the cape but I dont want it to go trough the body, I have added colliders but seems its not the way to fix it

[rancid kayak]

Still having the issue where my trigger colliders work as intended when I turn them on/off via the inspector but not via code. Why is there a difference there? What does the inspector do to let the collisions work as they are supposed to that isn't done with a simple "collider on/off" switch in a script?

the fact that it's working with the inspector tells me it's not an issue caused by my code, rather that my script is missing some crucial part that is difficult to see.

[quartz pagoda]

raycast?

[digital dust]

wym?

[quartz pagoda]

I don't think you can have a rigidbody with istrigger really stop from collision. But if you really need it to then you have to do a workaround. Like using a raycast, and manually try to find collissions and then stop the gameobject from moving

[polar leaf]

Hello

How do I apply torque to an object

so it rotates around a given axis ? (normal)

[timid dove]

Assuming it has a Rigidbody, you use the AddTorque method on the Rigidbody

[rugged geyser]

Hi team. I seem to be getting lots of physics.movebodies spikes. 400 characters with optimized transform hierarchies. No extra colliders or rigid bodies that don't have to be there.

Physics.processing is high too

Very high level but just wondering if there were some general go-tos

[marble cargo]

I am making an obstacle course, as a rotare this thing, it does not shove my cube down, the cube has a rigid body and the spining platform has mesh collider

[viral ginkgo]

@marble cargo the spinning thing might also need rigidbody

you might have to set its mesh collider "convex"

or give it a box collider too

[marble cargo]

imma try the first one

[latent plume]

Are there any resources on different applications of deltaTime?

Like equations for movement, gravity, drag etc.

Making a platformer using the Update() event

[wide nebula]

There's only one application for it, really. Whenever you're applying some value each frame, you need to multiply it by deltaTime because the time between frames is inconsistent.

[latent plume]

Right, but doesn't the equation change slightly for things like drag?

Like velocity *= velocity * dragRemainder * deltaTime doesn't work correctly

etc.

I could be wrong

it's just it's my first time dealing with physics timing to this level of detail and trying to fix my platformer

Working out which variables do/don't need * Time.deltaTime, and which if any need a different equation

[viral ginkgo]

dragRatio can be thought of the ratio of speed lost per second (although it doesn't work exactly like that similar to "interest problems")
@latent plume velocity -= velocity * dragRatio * deltaTime would work i think

[latent plume]

Hm

Okay, so I can see how that works, but are there no more edge cases after that?

My code has *= next to any addition except for where velocity is applied to position

But I still have different behaviour on different framerates

I can post the relevant code if that helps

[polar leaf]

Hey, the rigidbody receives 3 angles. How can I convert my axis / power to 3 angles?

[timid dove]

Quaternion.AngleAxis(axis, angle).eulerAngles

something like that

[polar leaf]

got it thanks

that's what I used so I might have screwed something

[mighty sluice]

testing my VR agent-physics interactions https://i.imgur.com/cd3edPv.mp4

[summer drum]

Do the Unity joints (Spring, Hinge, Character, Configurable) have different performance impacts?

For example, if my game has 100 Spring joints, or a 100 Configurable joints, is one worse than the other?

To my knowledge, config joints are like the 'parent' joint component. It can do what spring can, what hinge can, etc. So why wouldn't someone just use this one? Is there a downside?

[timid dove]

probably not. But if you want to profile them and let us know, that would be cool!

[timid dove]

Spring/hinge etc.. are easier to use. That's why you would use them over a Config joint

[summer drum]

So let's say spring is a subset of config, cause config can do more than just spring, but it can do spring, too.
So if you're just doing springiness work, you might think springJoint is easier to use than ConfigJoint,
but even for springiness alone, config is still better, because springJoint lets you set a spring value, but you cant set a different value for different axes, whereas you can with config

I find it hard to use the other ones when you know how config works. It looks daunting cause it has like 50 variables/values you have to adjust, but if there is no downside to using ConfigJoint even for the littlest thing, then it's the best joint to learn

[timid dove]

fair enough. Personally ConfigJoint is extremely daunting to me so I'm glad for the Fixed/Hinge/Spring joints.

But maybe I'll learn eventually

I suspect it's all the same code driving everything

[summer drum]

I suspect that as well, but there's a low chance that when they made Hinge/Spring, they might have actually made that code more efficient FOR the purpose of spring/hinge,

so if I were to use Config when I only need Spring, there might be some overhead code running under the hood that I am not using?

[timid dove]

It is possible

[summer drum]

I just hope not. I have a model that I rigged up with spring, and config (after), and there was no apparent hit to performance, but idk how to do a thorough check

[timid dove]

we don't have access to the source code so the best thing to do is just profile it

make a scene with 500 copies of a prefab. Test it using the profiler with the prefab having a spring joint, and again with a config joint

that's the way I could think of to test it

[summer drum]

Makes sense. I would also need to ensure I'm not toggling on/off anything else that appears to do nothing, but does something internally, when I am adjusting the Config's settings to achieve the look of Spring's.

[timid dove]

You could also of course ask in the physics section of the Unity forums and maybe someone from their staff will answer

¯_(ツ)_/¯

[stuck bay]

bruh mesh colliders are buggy af

[wide nebula]

You probably are just not aware of the limitations:
https://docs.unity3d.com/Manual/class-MeshCollider.html

[stuck bay]

anyway i have a translate moved player but he keeps clipping through walls and other things

[wide nebula]

Translation will not work well with physics collision detection. You need to use a Rigidbody and either add force or use the MovePosition function.

[runic surge]

is DOTS physics fully cross deterministic yet?

I keep finding conflicting information on that

I know this project aims to make DOTS deterministic https://github.com/Kimbatt/unity-deterministic-physics#:~:text=This is a modified version of Unity DOTS Physics version 0.6.&text=3%2C which supports cross-platform,simulation by using soft floats.

[meager spindle]

i've been at this for hours

i just can't seem to fix it

[timid dove]

What are you trying to do?

[meager spindle]

make it act like a cone

instead of it just

standing

[timid dove]

what does "act like a cone" mean

[meager spindle]

and when I use it ingame my pickup system just kinda makes it

dissapear

[timid dove]

Where did the mesh come from? Is it the built in Unity cone?

[meager spindle]

is my mesh just cursed or something

[timid dove]

Or a custom mesh

[meager spindle]

blender

fbx

[timid dove]

ok so what's it doing that is not cone-like

[meager spindle]

just kinda

stands

y'know

should fall over on its side when it hits the ground

[wide nebula]

What if you put it on a slight angle?

[timid dove]

if you put it at a slight angle does it fall over?

[meager spindle]

yes but the issue is that with older versions of the same mesh it does fall over

so something clearly has changed that shouldn't

[timid dove]

If it'sperfectly symmetrical it's just.. balanced I guess

[meager spindle]

seeing as the pickup system now just makes it vanish

[timid dove]

In real life nothing is perfect so it falls

[meager spindle]

yes but read this

[meager spindle]

this

[timid dove]

as for the pickup system - it's not related probably

there's a bug in your pickup system

[meager spindle]

no way

as everything else works fine

literally even other meshes

that I made too

so yeah you can see why i'm confused

[timid dove]

what do you mean by "vanish"

[meager spindle]

well

the renderer just dies or something like that

but it still exists

[timid dove]

Have you looked at the object in the inspector/hierarchy after the supposed "vanishing"?

[meager spindle]

it doesn't move though

[timid dove]

How did you make the cone in blender

[meager spindle]

even though it has a rigidbody

[meager spindle]

shift+a

then scaled it

exported

[timid dove]

ok good

[meager spindle]

thats literally it

also thing is this version is quite outdated

5.0.0f4 to be exact

[timid dove]

that's quite old but the features you're probably using haven't changed in a very long time

[meager spindle]

so can't quite just insert a cone

yeah im ultimately confused

have even tried making the collider with a mesh renderer

you could say

its cursed

[timid dove]

well... where is the mesh renderer here?

[meager spindle]

right here

[timid dove]

on a child object?

[meager spindle]

yes

[timid dove]

Why does the parent object need a MeshFilter then

[meager spindle]

idk is just there

forgot to remove it

[timid dove]

are you 100% sure also that you're using the same mesh in both places

[meager spindle]

uhh yeah

100% sure

[timid dove]

Idk - I would just try to debug the pickup vanishing thing

[meager spindle]

ehmm

yeah no I ultimately blame it on the unity's mesh collider being buggy

im gonna try and work some new solutions and see what happens

[timid dove]

Is there a good reason you need to use such an old version of Unity?

[meager spindle]

uh

yes

mainly being I just prefer them

I don't make all my games on unity 5.0.0f4 just so you know

I go with the newest possible that still has what I want

so like the obj model doesn't exist

lovely

o

my camera was inside the mesh

that makes sense

[weary moon]

does anyone know why a rigidbody wont slide across a surface even if its using a frictionless material?

in the context of using a rigidbody as a player controller, it sort of sticks to walls

wait a minute it works if i have a frictionless material

but its if the dynamic friction is 0, but shouldnt that be something that static friction affects?

[viral ginkgo]

@weary moon dynamic friction is the friction force multiplier when the object sliding on some other object

static is when its standing still

It takes a little bit more force to get the object to start sliding in real life right?

And then its easier to keep it sliding

Thats also how it is in unity

The friction you see in highschool physics questions is dynamic force but reallife also has a static friction force

[weary moon]

i thought i understood but i guess not lol

thanks

[viral ginkgo]

np

[fading crest]

I'm working on a stabbing system for my VR game (code here: https://hastebin.com/urunowobas.csharp) and while it can stab, it cant un-stab.

I've tried sending a raycast up the blade to detect if anything is on it to no results, and ive tried a boxcast to no effect. (Ive also tried trigger colliders, but that just causes more issues somehow). Any tips?

[compact mortar]

Hi all,
I have a big ask. Does anyone have ANY idea how to make train with proper physics. I can send in my code, however it it pre huge so idk. Maybe someone can help- I can pay you because its for a major game I am developing and I just cant get the train to turn a corner. Do Not suggest to me paths because that is not what we want. The player needs to be able to manually drive it
Thanks

[wide nebula]

Why won't a spline system work? You can move along it in any direction based on the players input.

[compact mortar]

Sorry, I am pretty new to this, what is a spline?

[wide nebula]

It's a path. 😆

https://assetstore.unity.com/packages/tools/utilities/curvy-splines-7038

For example, they even have a train demo.

[compact mortar]

Seriously

How did I not even know this

Thanks so much you legend

See, I should have joined this discord 3 months ago

[wide nebula]

I would check out the asset, it's quite powerful. People have solved these issues, there's no point trying to reinvent the solutions.

[compact mortar]

Ahaha, ok. Cheers

[compact mortar]

Hold up- its $50

How- I am a low-budget game dev

Any other way?

[wide nebula]

Make it yourself. 🤷‍♂️

[compact mortar]

Sure-

[wide nebula]

But you'll be spending more than $50 of your time trying to get something going.

Unity has sales, this definitely would be on it at some point.

[compact mortar]

I just found a video with a very nice description

so Imma just look at the description

xD

[wide nebula]

You can try Sebastian Lague's tutorial series on splines to get an undersatnding as well:
https://www.youtube.com/watch?v=saAQNRSYU9k

[compact mortar]

Ok

Cheers

[proud nova]

I recall Unity talking about providing something similar, but not sure if anything about that is public yet

[compact mortar]

and why are the only people that respond the community mods xD

[latent plume]

Hey does anyone know how I can get the correct initial jump velocity for a given jump height, jump time, and gravity?

[compact mortar]

idk, search up a formula and change it to code- check this thing out that I have stored in my 2tb hdd xD
...

isGrounded = Physics.CheckSphere(groundCheck.position, groundDistance, groundMask);

        if (isGrounded && velocity.y < 0)
        {
            velocity.y = -2f;
        }

        float speed = walkSpeed;
        float animSpeed = walkAnimationSpeed;

        float x = Input.GetAxis("Horizontal");
        float z = Input.GetAxis("Vertical");

        Vector3 move = transform.right * x + transform.forward * z;

        controller.Move(move * speed * Time.deltaTime);

        if (Input.GetButtonDown("Jump") && isGrounded)
        {
            velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
        }

        if (Input.GetKeyDown(KeyCode.LeftShift) && isGrounded == true)
        {
            speed *= 2;
        }
        else if (Input.GetKeyUp(KeyCode.LeftShift) && isGrounded == true)
        {
            speed = 3;
        }

        velocity.y += gravity * Time.deltaTime;

        controller.Move(velocity * Time.deltaTime);

@latent plume

idek if that suits ur thing- I have player animations os xD

[latent plume]

Ah that actually seems good. One sec

[latent plume]

what's the -2f for?

[compact mortar]

velocity.y = Mathf.Sqrt(jumpHeight * -2f * gravity);
```?

This ^^?

[latent plume]

yeah

[compact mortar]

Its something to do with a physics formula

I recon i did that wrong xD

Because I had issues with jumping, but it worked

maybe remove the -

lemme try that and tell you what happens for you

Ok so either works apparently

[latent plume]

Hm. Apparently it's close?

The number I get is always slightly too high

But it's near enough right

if desired height is 50, and gravity is 5, then I get a initial velocity of 22

but it should be 20

similarly...

if I have a desire height of 300, and gravity of 20

I get an initial velocity of 110 instead of 100

[compact mortar]

• honestly, I dont have a degree in physics

Its just code I have, so maybe you are helping me as well xD

[latent plume]

Well, thanks for the input anyway, brings me a bit closer to a solution

[compact mortar]

Ok, cool cool. Have fun xD

[latent plume]

cheers!

Okay, one more question for anyone who knows the answer

How do I work out the correct acceleration speed to reach a target speed in a target amount of time?

or a target amount of distance in a target amount of time... 🤔

Yeah, the latter one

[timid dove]

algebra

https://www.calculatorsoup.com/calculators/physics/displacement_v_a_t.php

start with the displacement equation - solve for whichever variable you want and plug in the rest

[latent plume]

Thanks. This seems really good. Is it just me, or can it not solve for displacement?

Or rather it only solves for displacement

Like I can't put an ideal displacement and solve for initial velocity

wait nvm nvm I found the option

ok looks good thanks! 😅

[compact mortar]

I have one for a train script @latent plume

var velocity = rbTrain.velocity;

        float speed = velocity.magnitude * 1.7f;

        if (speed <= 0)
        {
            speed = 0;
        }

        // Velocity = Force             / mass * time
        // velocity = currentMotorForce / 3000 * Time.deltaTime;

        fixedSpeed = (int)speed;
        speedText.text = "" + fixedSpeed;

If that makes sense

idek

rigidbodies have velocity built in and you can get it from var = rigidbody.velocity

[timid dove]

Yeah all the options are there. But you could also derive them following the normal rules of algebra if you needed

[summer drum]

I have this model that has ConfigurableJoints set up on all the bones, so when I drag this object around, the limbs behave well with physics.
Problem is, the whole object falls down to a ground.

Is there a way I could have this object just 'hover' in the air (not falling down), but with all its parts still physics-active when I move it around?

[latent plume]

I'm actually really bad at shifting around equations like that. Is there any resources you'd recommend for learning how to do that?

[timid dove]

Diosable gravity on all the Rigidbodies

[latent plume]

I was bad at it in school as well. Would like to be more independent with equations but I usually have to find resources like the one you linked

[timid dove]

uhhhhh... IDK it's been so long since I learned algebra... um I'd just google some basic algebra tutorials?

https://www.youtube.com/watch?v=V3dFHt9p5W8 This maybe?

https://www.mathsisfun.com/algebra/introduction.html

[latent plume]

I know a little bit about balancing equations and finding x etc. but there's usually points where I get stuck

Like, earlier, I got halfway through solving something that I felt would help me get the equations you sent

y = (x * (x+1)) / 2


y * 2 = (x * (x+1))

(y * 2) / x = (x+1)

((y * 2) / x) - 1 = x


so x = ((y * 2) / x) - 1

The one at the top I found online

[timid dove]

Well in any case - that site I linked gives you the equation to find any of the terms in that particular displacement equation

[latent plume]

The one at the bottom is me trying to put x on the left hand side. But then I still have some x stuck on the right hand side. Did I go wrong somewhere or is there more steps?

Yeah, the site you linked is really good, thanks

[timid dove]

Your algebra here was correct. The problem is it's a quadratic equation (it involves an x^2 term) which can't be solved using basic algebraic means

You have to use a more advanced technique for such equations

https://www.cliffsnotes.com/study-guides/algebra/algebra-i/quadratic-equations/solving-quadratic-equations#:~:text=There are three basic methods,formula%2C and completing the square.

[latent plume]

Ahh, okay thank you

The funny thing is I think I did these in school, but at that point I was doing everything entirely by rote and none of it had meaning

So I've pretty much forgotten anything I did back then

[timid dove]

yeah the way some schools teach I believe is... not good 😉

[latent plume]

😦 true dat

[timid dove]

it's better when there's some actual problem you're trying to solve and the terms have meaning

rather than just being abstract numbers and letters on paper

[latent plume]

For sure

I wish I learnt gamedev sooner because it definitely contextualised a lot of things I'd seen before

[summer drum]

Disabling gravity on all the rigidbodies also disables the physics activity, though.

[timid dove]

it shouldn't...

how are you disabling gravity?

[summer drum]

The model itself is a nature object so the natural leaves and stuff have to wobble in the air when I drag my object around, they wobble until they settle into a droopy position since gravity is applying on them.

[timid dove]

gravity only controls... gravity

[summer drum]

When you say disable gravity on them, you mean Rigidbody.useGravity, correct?

[timid dove]

yes

[summer drum]

What would make the limbs droop down though?

Limbs of the plants, etc.

[timid dove]

gravity of course

being pulled down by gravity of itself and any other bodies they're attached to

[summer drum]

Okay, I'll have a go with that, thank you for info

[summer drum]

Okay, you're perfectly right, my bad.
Disabling gravity just disables the flower from falling

the limbs themselves also don't fall, but they do still act with jiggles to the rest of the movement

I can work with this, and make adjustments

[warped pasture]

I'm completely new to Unity, so please forgive any false assumptions.

I'm trying to align gravity to a plane in space. Currently I'm raycasting from the camera, then getting the transform of the GameObject that's been hit.
I want to use this transform to determine a vector to set UnityEngine.Physics.gravity to, so that rigidbodies will be attracted in the direction of the plane, not directly towards it.
By this I mean that a plane along the x-axis should create a normalized vector of (1, 0, 0) (or (-1, 0, 0)) depending on the side of the plane that the raycast came from). Of course this would also need to extend to more complex rotations.

Thanks for any help you can give me

[grizzled sapphire]

What exactly do you need help with? You've explained only what you want, not what your issue is?

[warped pasture]

mainly that i'm not sure how to go about this as such... I'm not too familiar with the different data representations (quaternions etc.) so just any pointer as to whether this would be possible and a general outline of how it could be done

[glossy sable]

What exactly do your planes look like? 1 vector isn't enough to define a plane

Wait, maybe it is enough. Is the direction vector perpendicular to the plane?

[warped pasture]

it wasn't, but i believe that i have worked it out now, just getting the normal of the raycast hit, then inverting that

thanks for the help anyway

[flint slate]

Hi all, I'm having issues with the hockey stick not colliding with the hockey puck while the player is moving. They collide just fine when I stand still. Both the puck and hockey stick are using convex mesh colliders with continuous dynamic rigidbodies. I am also using a character controller for the player (not sure if that matters). I'm very new to Unity and game development, so any help would be appreciated. Thanks!

[timid dove]

It's because you are using a CharacterController for the body.

if the stick is a child of the player body - then when you move the CharacterController, the stick is basically just teleporting as far as the physics engine is concerned

it will teleport right through the puck no problem

You need to move the stick only via its Rigidbody

[compact mortar]

@wide nebula I found a way to make the train with full physics:

"I used sphere colliders for wheels and plane surfaces next to the wheels so that the wheels do not fall off the track. The wheels are connected to bogies by using hinge joint. The bogies are connected to the coach body by using hinge joint."

This was just in the comments of a video and it may have saved me months worth of work

[flint slate]

That makes sense, but I don't have the stick as the child of the player body. I use the auto hand asset to grip and pose the hands when gripping the hockey stick. It's not located under the player.

[timid dove]

how does the stick move along with your hand when the player moves though

seems like there's some kind of teleportation happening still

[flint slate]

I'll need to go back in and play around with it. Would a solution be to use a rigid body instead of a character controller? I would also like my character to slide a little when moving, like on ice. So a rigidbody may the only way for that.

[tacit laurel]

weird: when timesclae < 1 rigidbody with interpolate are still stuttering

seems that interpolate should smooth that... bug?

[compact mortar]

Is there a reason wheel colliders make the camera go funny when the spring and damper exceeds a certain number xD

[lusty cloud]

is this a good script for damping? it doesnt seem to work. LastLength = SpringLength; SpringLength = hit.distance - WheelRadius; SpringVelocity = SpringLength - LastLength; DamperForce = DamperForce * SpringVelocity; SpringForce = Stiffness * (SuspensionLength - SpringLength); SuspensionForce = (SpringForce + DamperForce) * transform.up;

[grizzled sapphire]

Why doesnt it work, what does it do and what do you expect it to do? What have you tried?

[lusty cloud]

its supposed to dampen my suspension, but at low values it does nothing and at high it makes my car vibrate

[grizzled sapphire]

            LastLength = SpringLength;
            SpringLength = hit.distance - WheelRadius;
            SpringVelocity = SpringLength - LastLength;

What is the result of SpringVelocity? Can you log those

[lusty cloud]

wait i made changes. this seems like it should work in my peanut brain

            SpringLength = hit.distance - WheelRadius;
            SpringVelocity = SpringLength - LastLength;
            DamperForce = Damping * -SpringVelocity;
            SpringForce = Stiffness * (SuspensionLength - SpringLength);
            SuspensionForce = (SpringForce + DamperForce) * transform.up;```

and springvelocity is the difference of the compression from last tick

[grizzled sapphire]

Can you log your values please, or use a debugger, to see what they actually are?

            LastLength = SpringLength;
            SpringVelocity = SpringLength - LastLength;

My peanut brain says this is always 0, and you should store LastLength at the end of the method

Oh nevermind thats wrong

[lusty cloud]

ok

ok again

all floats are public so i see the values

[lusty cloud]

now i have this, seems much better but still bad

not it just glides around and jumps

[stuck bay]

Hopefully I make sense, and someone is able to give me a hand:
Working in 3D, and trying to get balls to bounce off of each other. I've got a radius and x,y,z, and it's easy to figure out if two spheres are contacting each other through the hypotenuse of the centers of the two spheres.
However, I've been trying to figure out for a while (and getting it wrong) for calculating the angles at which they should bounce off of each other.
(For simplicity, if we assume sphere_two is stationary, and sphere_one contacts it perfectly on the bottom/left/right/top/etc., sphere_one should just change velocity in one direction). I've got more theoreticals in my head, some of which I am still wrestling with, but I'll press send before adding more in case someone cuts me short 😂

Not worrying about conservation of momentum for the time being.

Ah, for someone who did more than just rudimentary Physics and Maths, you'd think I know I need to use the normal...

[spiral moon]

ehy

is better to use bassic Colliders like a cylinder to a character insted the mesh collider?

so in which case I should have to use mesh

[wide nebula]

Mesh colliders don't work with skinned meshes. So you use primitives.

How accurate you want to be is up to you. Using multiple child colliders for arms and such.

[spiral moon]

like making the colliders with Cylinders with diferents Empty GameObjects

and set the size for the harms and legs

[wide nebula]

Yeah, essentially that.

Again, that's only if you need that level of accuracy. Most of the time, you don't.

[spiral moon]

thats how big games like God of War use to make colliders?

[spiral moon]

and in which case should I use mesh colliders?

[wide nebula]

For irregular shaped meshes.

[spiral moon]

like ...

something that I cant cover with primitives colliders?

[wide nebula]

Something that would be a hassle to. Say, like a car, or a building.

[spiral moon]

in this case I will use an mesh collider

[wide nebula]

The reason you can't for skinned meshes is because the collider doesn't follow the bones. So it won't keep the "shape". You can force it to rebake the collider in code, but it's an expensive operation.

[spiral moon]

like it will never follow the animation of a character

right?

[wide nebula]

Yep

[spiral moon]

OHHHHHHHHHHHHH

thats was happening to me right now so I change to a primitive cylinder

Lmao thanks for clarifying the doubt

[spiral moon]

why the Collision is not working, both characters has Colliders, and Rigidbody

for examle look both has Colliders and rigidbody

[timid dove]

because you are moving the object(s) with an animator instead of using the rigidbody's methods

[candid arrow]

Is there away to turn off box collider collisions without turning on is trigger

[static plover]

make them both kinematic?

or put them on layers and turn them off in the layer collision matrix

[glossy sable]

There is also IgnoreCollision. Depending on your situation https://docs.unity3d.com/ScriptReference/Physics.IgnoreCollision.html

[wide nebula]

If they're just standing there, then it's fine. It's not like you're dropping 100s of these with rigidbodies.

[timid dove]

It also depends how spread out they are etc. Unity doesn't even look at the MeshCollider unless the Colliders pass the AABB bounds check first

Nope it's much more optimized than that

Try them both out and see

[spiral moon]

the objects are moving by the transform.Translate();

[timid dove]

exactly

you are not using the Rigidbody

so you are bypassing the physics engine

[spiral moon]

I have a problem with the primitive collider cylinder I guess

when playin the character start to falling and execute the animation of falling but this is the problem even when collision with the floor the character doestn stand up to walk

like this

but the cylinder collider is on the floor and is touching the floor so the character should walk correctly

[pure mist]

using Unity.Physics. I am moving the character by altering his velocity.Linear to keep his momentum updating correctly (instead of Translation.pos, which would just tp him to that next point and lose his momentum). It works.
Now I want to so similar with rotation. Would I simply just alter velocity.Angular? Or do I need to mess with PhysicsMass.InverseInertia or PhysicsMass.Transform.rot? Again I'd like to preserve his angular momentum during these alterations.

[dawn snow]

anyone help

[foggy rapids]

https://dontasktoask.com

[dawn snow]

I want to make the ball chip whenever it touches the the back side of my player

??

[dusty ledge]

I am making a game with separate server and client projects. For some reason my physics between the client and the server vary dramatically, the physics and time settings are the exact same. If anyone knows why let me know.

[runic surge]

this is because syncing physics is a very complicated and hard thing to implement

Even if you have the same simulation, you may not get the same result. Even if you have the same simulation and a different machine you may not get the same result...this concept is called determinism. I recommend this resource https://www.youtube.com/watch?v=Z9X4lysFr64

[timid dove]

Yep - physics are a chaotic system - slight variations in floating point precision on different hardware or slight differences in starting states will quickly result in drastically different simulations.

[dusty ledge]

yeah, that makes sence, but both sides are producing repeated things that vary from each other

[runic surge]

Unity physics for example can be soft deterministic, meaning it will be deterministic given the same inputs and the same machine. Most physics engines work this way.

[timid dove]

Rather than trying to keep physics simulations in sync across machines a lot of games take the approach of doing one canonical physics simulation on the server and having the client do local simulation only to interpolate/fill in the gaps between server updates basically

[arctic marsh]

Thats why you start glitching when having bad connection. It really depends on your game, how precise does it have to be?

[dusty ledge]

I am not smart enough to make the player movement feel smooth through this

[timid dove]

Multiplayer is not easy

[dusty ledge]

I might just move to a non physics movement system, but my movement felt so nice 😭

[arctic marsh]

Again, how dependent is the game on precise physics?

What do you calculate on the server?

[dusty ledge]

not really, I don't use it at all except for movement

[dusty ledge]

I calculate the movement on the server to prevent cheating and I calculate it on the client to make it not laggy

[arctic marsh]

Prevent cheating? I could understand checking on the server for high values but not calculating the whole movement on it. I would sync the local movements on the server with every client.

[dusty ledge]

Ok, that is probably better, but it would probably mess up the game if someone with high latency played, since they would be jittery

[arctic marsh]

that's what I know from old games. I mean, you could still lerp the position locally for other clients to, so every character moves smoothly, but if you played some multiplayer, you might have seen some glitching people jitter around

[dusty ledge]

I guess it will work, prob not the best solution but it will def work, thanks

[runic surge]

facts

[dusty ledge]

Fax

[charred cedar]

im having a problem with one of my scripts, when i press spacebar it won't apply force upwards

heres the script

[timid dove]

what do you have set for the groundmask in the inspector?

and where is the groundCheck object? Is it touching/near the ground?

[charred cedar]

brackeys said to create a layer called ground

[timid dove]

and what is groundDistance set to in the inspector

[timid dove]

I wasn't asking what brackeys said - I was asking how your script is configured in the inspector

[timid dove]

ok and what layer is your ground object on?

the platform or whatever you're standing on

[charred cedar]

the same as the groundmask

so ground

[timid dove]

can you show that?

[timid dove]

Are you getting any errors in console?

[charred cedar]

nope

[timid dove]

Can you show the position of your GroundCheck object on your character?

[timid dove]

right so...

it's not positioned near the feet of your character is it?

[charred cedar]

oh

i put it to -1 on the y axis, is that good?

[timid dove]

Look at it visually

it should be near the feet of your character

[charred cedar]

so not on it?

[timid dove]

the script is going to check a sphere of radius "groundCheckDistance" which right now is .4 centered at that object's position

So you'll want it to be within .4 meters of the ground. The standard CharacterController capsule height is 2

it should be basically on the ground or very near the bottom of your character

[charred cedar]

ah ok

and it works

thanks

[pseudo agate]

If I wanted to make a 3d platformer with moving platforms that the player (and other colliders) would using animations be suitable for that?

[timid dove]

better to use Rigidbody.MovePosition to move the platforms

and make them kinematic Rigidbodies

[woven spire]

Hello, Im trying to make a 2D Controller with Rigidbody. Currently, I move my character with rb2D.velocity. The thing is that I want to move it with a platform that moves in the X axis with a rb2D.MovePosition. Since Im not passing it any input on the platform the X velocity of the player is 0 and it will fall. How can I make it move with it? I tried using rb2D.AddForce for moving the player but the movement is bad.

[wide nebula]

When standing on a platform, take the same velocity that the platform is using for its MovePosition and apply it to your player.

[stuck bay]

https://i.gyazo.com/2e27a43e3969f4236c2ce57dbc2199c7

How do I go about fixing this sort of bouncing from the wheel collider?

dm if you want to view the wheel collider settings, I don't want to clutter up the chat

[stuck bay]

nvm

Had to set "Damper" to 0

[gusty agate]

Hey, I want to make a car and add the wheel colliders. But I can't see the collider. I already made two new projects but there is the same problem.

[timid dove]

Do you have Gizmos enabled?

[stuck bay]

Make sure the object at the top of the object hierarchy has a rigidbody.
Most likely, it'll be an empty with a box collider that represents the car as a whole.

Wheel colliders need a parent object to have a rigidbody, that's why.
Maybe they can have a rigidbody themselves, but I don't think that'd be practical

[fast ermine]

hi, does anyone know how to change the size of a particle system in unity?

im trying to make it snow over my whole scene but i cant seem to find where to adjust the size of the particle system

[timid dove]

You'd just change the emission to emit from a very large area

[viral ginkgo]

@fast ermine the "shape" in the particle system, you change the size there

[timid dove]

ah yeah - Shape is right

[viral ginkgo]

But i wouldn't want snow to rain on whole scene

I'd want a small field following the player

Also in world space

So the moving field doesn't also move the particles

[fast ermine]

thanks

[pseudo agate]

Reposting in here because maybe I was in the wrong channel... So I have a script (https://pastebin.com/KxeJLAS2) that moves me and the player on a moving platform. It works fine but the problem is it deforms meshs/objects. How could I fix this? Video demonstrating the issue: https://streamable.com/lpqdjx

[timid dove]

Your problem is your platform has non uniform scaling

So anything that you set as a child will get stretched and distorted

The fix is to only use non-uniform scaling on objects that don't have any children

E.g. move the "stretched" part of your platform to a child object of the platform

And scale that instead

[wide nebula]

@wet forge Don't spam shady links.

[wet forge]

what do you mean??????

I didn't even use discord today

my brother is at my pc doe

where did "I" send the links?

[wide nebula]

Everywhere. Your "brother" is going to get you banned if it happens again.