⚛️┃physics

[civic field]

https://docs.unity3d.com/Manual/class-WheelCollider.html
The doc is pretty self explanatory
If the level of control/understanding you need is greater than that then yeah create your own.
Aint no easy task so that's for you to choose

[burnt kite]

is it possible to attach a animation from mixamo in a gameobject in unity?

Idk if this is the appropriate chat

let me know if it isnt

[desert wave]

yes, im not sure i understand your question but you can download the animations form mixamo to unity

[burnt kite]

I mean, can I apply the animation in my player?

the player is a different mesh renderer

avatar

idk

[desert wave]

yes i think

[timid dove]

You need a rigged mesh with the correct bone structure and a skinned mesh renderer

[tall monolith]

Hey do anyone know how to make the player add force onto the other objects by ran them up, like in karlson, dani make it so like he would bump into billy and make him fall down and kind of bounces off like adding force to it, do anyone know how to make that in unity

[worn kindle]

Hey, how can i change the shape of a hitbox of the box collider 2d? I have a triangle spirit, but the hitbox is a rectangle

[timid dove]

Box colliders are always box shaped

Look into polygon collider

[worn kindle]

ah thank you

[brisk plaza]

Hello! I'm trying to make room in a level of a platformer game by moving things to the right. The issue is that the game is prefab-based and some objects have trigger areas that do not move with the object itself. Is there a way to quickly select and move like half of the level?

[civic field]

Why are the colliders not attached to their objects ?

and why can't you move both the colliders and their objects the same amount if they are not connected

And why would you need to move everything in the first place

[desert wave]

unity's physics already do that type of stuff

with rigidbodies and colliders

[past grail]

How can this happen at all?

[fallen oyster]

How do I stop a 2D object from moving?

[lilac night]

Mostly depends on why it's moving.

And whether it's got velocity or is being lerped to a position (or some similar effect)

[fallen oyster]

It'ts moving because of a 2D collider and 2D rigidbody.

I just figured it out myself, I needed to set constraints. I'm gonna' see if that worked.

Nope, fuck.

[timid dove]

how can what happen?

[lilac night]

@timid dove It didn't work on mobile for me but apparently the stack of 5 boxes collapses into 4 and kind of bounces like a spring.

[tall monolith]

Well, i didn’t know that, now i do

Thanks

[sleek mantle]

I am having a little trouble with rigidbody2.velocity.y

the rigidbody inspector is showing incorrect values for my player's y velocity

you can see in the vid above that rigidbody inspector is showing a value of 7.67128e-06 or something when moving on x axis and shows 0 when it slides down of ladder

does anybody know why this is happening?

[drifting ermine]

If there is a really fast and brief collision onEnter is called, but onExit is not.
Does anyone know how to fix that? I have to add and remove the colliding collider from a list

[shell adder]

what collision mode are your colliders set to? try setting both to continuous and the one moving fast to continuous dynamic

[drifting ermine]

Ah the head was still at discrete yeah

[drifting ermine]

That fixed it!

Thanks
Also, whats the exact difference between continues, continues spec and continues dyn

[hushed fractal]

How is it possible that the collider moves but not the mesh ?

the axis is wrong , i fixed that but still the mesh doesnt follow the physics

Nevermind , I found the problem. The object was marked static

[spice kite]

Does anyone know why my character shakes?

[timid dove]

too much caffeine?

idk it could literally be anything

is this vr?

Are your objects thousands of units away from teh origin?

[spice kite]

This isn't VR, not sure about caffeine haha

[spice kite]

Not sure

[shell adder]

sorry i didn't see this but discrete is the default setting where collisions are checked every frame, use this if you have no fast moving objects
continuous is where collisions are detected in between frames, use this for objects that will collide with fast moving objects
continuous dynamic is for objects that move fast and so is also checked between frames, so use this for the object that will move fast
meanwhile continuous speculative is the same as continuous but it's less resource intensive, and i think that's cus it tries to guess where objects will be and instead of checking inbetween frames it does collisions based on that guess, so use that if you have performance issues
the docs have some info here https://docs.unity3d.com/ScriptReference/Rigidbody-collisionDetectionMode.html

[drifting ermine]

Thanks a lot!

[shadow seal]

Are you directly setting a rotation without lerping

[viral pilot]

it definitely looks like you are running out of precision, try moving your character onto 0,0,0 and see if it fixes it, Unity currently does not support camera relative rendering, which means object over certain distance from origin 0,0,0 will start getting out of precision

[spice kite]

Ah okay, might be why because I've moved the object

[north egret]

Hello have a simple question,
how is the addforce mesured?
is 1 meaning enough force to traverse 1 block?
or is it a force like newtons?

[timid dove]

force doesn't mean distance

it is like newtons

[north egret]

so say i zero friction how much force will it take to move 1 block/meter?

[timid dove]

If you apply 1 unit of force for one second it will accelerate the block to one meter per second of velocity

assuming the block weighs one kilogram

[north egret]

ohh ok i see thanks

[timid dove]

F = ma

[north egret]

ok

[timid dove]

notice the "apply it for one second part".

normal force is meant to applied over a span of time

meaning over the course of multiple FixedUpdates

[north egret]

so is there a way to know how much force is need to launch a ball in an arc to hit a specific position?(sorry im not that good in physics)

[timid dove]

yes, there's a whole field of study called physics and a set of equations called kinematic equations that are designed to calculate that kind of thing

[north egret]

ok imma do further research ig

thanks

[timid dove]

typically with kinematic equations you can determine the appriopriate starting velocity and angle you need to launch the object at to land at a particular place

if you know that you can simply set the velocity as desired and not worry too much about how much force would actually be required to do it

[shadow seal]

dear god

that's exactly what I learned this week in physics

it's coming in handy!

[shell adder]

wow school is useful (sometimes)

[shadow seal]

let me see

uhhh

I think I think better after eating

[spice kite]

Doesn't fix the issue

No, it did. I had it set to 500 100 700

[vernal sable]

hey guys how could i detect in a good way the collision? because my projectile sometimes pass through without trigget OnCollisionEnter :/

[timid dove]

• Switch the collision mode on your Rigidbody to continuous
• decrease fixed timestep
• reduce the speed of your projectiles
• increase the size of your projectile collider
• increase the thickness of your walls or whatever the projectile is hitting
• do custom raycasting

[gray falcon]

Can someone help me understand this formula. I cannot figure out why this does not take into account the "density" of the body in the water. i.e. if its made of wood it's gonna be 50% less likely to float than if it was a beach ball.

Applying this to my boat, if i pull it deep under water, it orientates itself pointy end first (very cool), but then it shoots out like a rocket, but I would have expected the buoyancy force to be significantly less

[burnt plover]

I do this with a linecast. It checks whats between the current position and previous position and if it hits something it does damage and destroys itself

[supple sparrow]

No, buoyancy doesn't depend on the mass of the object. Only its volume (and thus the volume of water displaced)

[gray falcon]

really? is it not dependent on the mass of that volume vs the water's ?
or rather.. the mass of the object has gravity acting on it, but its not using that here

[supple sparrow]

It's more about the density of the object compared to the fluid

[gray falcon]

I guess if it has applied this to a rigidbody, and that has gravity enabled & has a mass configured it should even out

[supple sparrow]

Buoyancy will fight gravity, sure. But mass shouldn't affect the result

You could mess with rho if you want to really tweak what floats and what doesn't, see what you get

density of water is assumed 1

You could increase or decrease it slightly depending on the relative density you expect from your object

🤔 I don't know you may end up with weird results elsewhere

show it to friends around you, see if they find the floating too quick too

[gray falcon]

https://streamable.com/v2wrjx the issue if you're curious 🙂

this is one thing, its very unintuative thats for sure

[supple sparrow]

Oh I see. speed looks okay in water but once in the air not so much 🙂

[gray falcon]

yea haha

[supple sparrow]

Yeah increase mass then

or square the gravity force

[gray falcon]

I also have quite low drag, as I thought it would affect the handling in the water. Maybe I should up that too

[supple sparrow]

(outside of buoyancy - when in the air)

Yeah focus on fixing the feeling in the air, not in water

[gray falcon]

i do have an "isAirborne" bool available already, can maybe fiddle with that

[gray falcon]

added 5 tons on, seemed to help a lot

[grizzled root]

hi can someone tell me why the player still sticks to the platform even though i've added a no friction material?

[desert wave]

Are you applying force to the player

[grizzled root]

@desert wave force as in..? they have the rigidbody component and the no friction material attached

[desert wave]

And does one of them have gravity?

Or do one of them is being pushed against the other?

[grizzled root]

gimme a sec i'll show u how the game works

@desert wave it's basically just a very simple platformer game

[desert wave]

Ok

Can you do the bug

[grizzled root]

@desert wave

it should just fall but it sticks to the platform even after lifting the right arrow key

[desert wave]

Are you on windows?

[grizzled root]

yeah im using a windows laptop, if that's what ur asking?

[desert wave]

Hit windows + G

It will show a bar in which you can record your screen better

But going back how do you move your character

[grizzled root]

by using the arrow keys

[desert wave]

With Addforce, velocity or translate?

[grizzled root]

{
    private Rigidbody rb;
    private bool JumpKeyWasPressed;
    private float HorizontalInput;
    [SerializeField] private Transform groundCheckTransform; 

    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    // Update is called once per frame
    void Update()
    {

        if (Input.GetKeyDown(KeyCode.Space) == true)
        {
            JumpKeyWasPressed = true;
        }

        HorizontalInput = Input.GetAxis("Horizontal");
    }

    private void FixedUpdate()
    {
        rb.velocity = new Vector3(HorizontalInput, rb.velocity.y, 0);

        if (Physics.OverlapSphere(groundCheckTransform.position, 0.1f).Length == 1)
        {
            return;
        }

        if (JumpKeyWasPressed)
        {
            rb.AddForce(Vector3.up * 6, ForceMode.VelocityChange);
            JumpKeyWasPressed = false;
        }
    }
}

this is the code im using

[desert wave]

What happens if you put the no friction on the player?

[grizzled root]

it's already been added

[supple sparrow]

So it gets stuck only when you fall on the edge of the platform ?

[grizzled root]

yeah, instead of sliding down

[supple sparrow]

uhm probs because the overlapsphere

you can detect the ground diagonally

and even from the side

so you can stick to it like spiderman

[grizzled root]

i don't quite get it..

[supple sparrow]

Physics.OverlapSphere(groundCheckTransform.position, 0.1f)

[grizzled root]

what do i change/add?

[supple sparrow]

it would even stick you to the bottom of the platform if you jumped to it from below 🙂

I would probably try to do 1 raycast down. Or 2, one at each feet eventually

[grizzled root]

but why does the no friction material have no effect

[supple sparrow]

good question

i'm not used to them 😅

[grizzled root]

ah it's alright, thanks anyway :)

[supple sparrow]

maybe show the rb and collider of the player

[supple sparrow]

yeah at first I thought you returned too early because of the overlapsphere but it's just jump code after that

Shooting in the dark here, can you try with a Friction combine of zero on the NoFriction mat ?

maybe the average with the platform prevents it from sliding 🤷‍♂️

[grizzled root]

?

[supple sparrow]

i wanted to say mutliply

damn i'm tired

but minmum should be okay too in fact

[grizzled root]

didnt work,,

[supple sparrow]

Uhm. capsule mesh of the collider seems right... I have no clue right now what is the problem :p

collider f the platform is just a box i assume

[warm helm]

hiya, i have a question; i'm trying to make a one-way 3D platform (similar to smash bros) but i cannot get it to work. any ideas?

[inner thistle]

That's a bit too vague

Is there some specific problem or...?

[warm helm]

like, i got it as far as being able to jump through the platform and land on the top, but i cannot make the "hold x key to go down" part to work

[marble mural]

Hey, I need Polygon colliders at all of the street walls. Is there any way to do this quicker than placing them all manually?

[spiral tulip]

if your walls follow a strict pattern, you could generate the colliders programmatically

if not, when you add a polygon collider, it should automatically detect the shape if it's 2d but otherwise you'll have to place them manually unfortunately

[random sedge]

Hoping this is the right place to post this, I haven't been on this discord in a looooong time

So

I'm trying to get this crouch mechanic working

And when the player crouches, the shrink, and all looks to be well. The capsule from the first person controller component shrinks accordingly

Nevertheless

I can't fit under the slab!

And I don't get it at all

[ashen tangle]

Hey guys, I'm trying to make a system where a player (rigidbody) can stand on a boat (rigidbody) and he can move freely around it and not fall off it it starts moving. The solutions online suggest making the player a child of the platform only when on top. This doesn't work as they are both rigidbodies. How can I make this work?

3D btw

[gentle cape]

See the video below for the weird behaviors.
To be clear it doesn't do this all the time, more like in 10-15% of the cases.

Normally the discs bounce of each other and other collision objects(like the pillars) and move in an equal or opposite direction.

Weird behavior includes:

discs being clued to the ground and not budging or just flipping weirdly and getting pushed through the ground collider
Instead of bouncing off various collision objects and going into an opposite and equal direction ... it just pushes through the initial direction and does not bounce off of collision objects but rather , it pushes around them

I was wondering if anyone knew where or how this behavior gets influenced or defined ...because I don't know where to look anymore
https://youtu.be/HA60zLETNc4

[desert wave]

You have the moving platform problem

[desert wave]

It doesn’t seem that hard to solve can you show us more, like how is the force applied, is the collision continuos, do they have a physics material

[desert wave]

It should

Work

[craggy cave]

how can i transform a collider? i want it to be on the human model yknow

[alpine delta]

I am 99% sure you are just resizing only mesh of player not its collider

[limpid hornet]

At what point should I consider creating a simpler mesh for a MeshCollider?

[copper sentinel]

why capsule collider for player is a good idea? the more i work with character controller the more i get frustrated

[desert wave]

Yes

[weak sable]

I have a question, how can I look at the havok debugger?

I wanted to play with it but I can’t find out how to access the debugger

[sweet snow]

There is no one fits all answer, it depends on the accuracy you need and how many of the collider you have active at once. But I'd say always, unless you have a reason not to.

[spiral tulip]

i think both objects involved in the collision have to have a rigidbody as well as a collider so try that and if it still doesn't work check the normals on both meshes

also i vaguely remember reading something about mesh colliders not being allowed to collide with other mesh colliders but that might be wrong idk

[teal harness]

can anyone help me with cloth physics? its like colliding with a collider thats not even there

[limpid vigil]

If youre willing to use probuilder, you can use the meshes made as mesh colliders (keep them simple of course)

[fringe heron]

Hello, can you say why my character controller jitters when jumping to a wall?

wow, setting step offset to 0 worked

but... with step offset with value 0 I am still able to climb stairs

why?

[gentle cape]

I wish it wasn't hard to solve. 😉

The force is applied by taking a dragdistance and apply that as a force multiplier, I use Forcemode.Impulse.
The collision detection is set to continuous dynamic and I have made and applied a physics material.

On this material I have set Dynamic and static friction to 0.475 and bounciness to 1 ...friction combine to minimum and bounce combine to Multiply

I have frozen Position X on the rigid body and the rotations of X & Z

[desert wave]

what are the constraints for?
can you freeze position on the y?

[gentle cape]

Well there is a setting that says it constrains things on y ...not sure if it really works though.... and I constrained y because otherwise the discs fly into outer space ... I fixed rotations because someone suggested that the discs might tip on collision ...but it doesn't really make a difference .... even physics settings don't do anything noticable

[desert wave]

well you need to discover what causes the error, try only 1 constraints

or different settings and stuff like that

if its the velocity or your pc

[fringe heron]

Can u help? pls

[timid dove]

Usually this issue is caused by calling CharacterController.Move more than once per frame

you should combine all of your cc.Move calls into one

[fringe heron]

hmm.. I use .Move() for x & z

and after

for y

in different functions

[timid dove]

yeah you will need to combine those

[fringe heron]

ok, thanks, I will try it out

[timid dove]

the basic idea is simple. Just take the two Vector3s you call Move with and add them together, then call Move with the combined vector instead

[fringe heron]

thanks ❤️

2min

:/ I could not doit, can you help?

@timid dove

[timid dove]

like I said you just have to add those vectors together and call Move one time with the result

[fringe heron]

I added _velocity vector to the moveDir

but

It didn't work well

[timid dove]

not _velocity and moveDir

those entire expressions

[fringe heron]

_velocity * Time.deltaTime + (moveDir) * _currentSpeed * Time.deltaTime

?

[timid dove]

yes that looks more correct

you can also simplify a bit like

(_velocity + (moveDir * _currentSpeed)) * Time.deltaTime```

[fringe heron]

I did this

😄 Thanks a lot

it worked! <

❤️

[buoyant inlet]

anyone know how i can make a wall that only the player can walk through, and no other 3d objects can get past

[coarse veldt]

You can use layers and toggle the interaction off for certain layers in the Physics settings

[buoyant inlet]

wdym by physics settings

[desert wave]

in project settings

theres a place for physics

[timid dove]

https://docs.unity3d.com/Manual/LayerBasedCollision.html

[ebon zephyr]

Hello, is there a way to share colliders between different physics scenes? I have a big world and copying everything to every scene seems to be wrong

[supple sparrow]

Make a Prefab from them, then Instantiate in each scene ?

[ebon zephyr]

the problem is that the collider i want scenes to interact with is a massive multi object thing, copying it 16 times will be too slow

terrain, tons of roads

[arctic marsh]

Not sure what your setup is, why do you have the same world in different scenes? Why not use one scene and lay the gameplay as a dynamic object on top?

[ebon zephyr]

The setup is just a big world scene and small scenes dedicated for physics only that i want to step

[thorn geode]

Y’all ain’t no nothing till you make soft body physics with a swarm of pixel art monkeys

https://cdn.discordapp.com/attachments/419711149647462410/889979993864667236/8mb.video-iUh-HuazTXU8.mp4

[desert wave]

is it lagging or is the player moving and stopping?

[thorn geode]

Player is moving and stopping and monkeys are pushing character around

or maybe video hasn’t loaded fully for u

It’s like a thick syrup of monkey

[desert wave]

it was my internet that was lagging, looks cool tho

[midnight glade]

Does anyone know why my collision stops working whenever I add a Rigidbody to my Player, but when I remove the Rigidbody and only keep the Box collider it works again? The collision is specifically with the particle system

[timid dove]

what are you doing to detect collisions

[midnight glade]

Sending message in the "collision" module in my particle system

The particle system works as a gun firing particles as bullets, but the collision is only registered when it hits the player with a Box collider, but as soon as a ridigbody is added it stops detecting it

I did "solve" it with a workaround by adding an empty object as a child and attached another Box collider + Rigidbody so I can register collisions with other colliders in the world, but the combo of both those components is what the particle collision has something against apparently

Feels very weird

https://answers.unity.com/questions/1840869/rigidbody-and-particle-system-collision-detection.html

Seems like this dude had a similar issue, though never addressed

[coarse veldt]

There's a bool for https://docs.unity3d.com/ScriptReference/ParticleSystem.CollisionModule-enableDynamicColliders.html I wonder if that would help here

[stuck bay]

Hello i have a question about rigidbodies and i think best way to explain my question is by giving examples(because my english isnt that great). Lets say that i have an object that i want to catapult towards a location. How can i calculate the force to make sure that object hits its target?

[timid dove]

There's a series of equations in physics called "kinematic equations" which relate various aspects of a ballistic trajectory, including initial velocity, initial height, final height, angle of launch, etc...

you would use those equations and plug in the desired distance, initial angle, max height, target height, etc.. and solve for initial velocity

[stuck bay]

thank you very very much! i didn't even know what to look for while i was doing research!

[alpine delta]

There is a way to disable/enable all physics in game? I need to enable physics when player initial spawn event is called (mp game)

[timid dove]

two main approaches I'd say:

1. Pause time with Time.timeSale = 0;
2. Physics.autoSimulation = false;

[alpine delta]

Physics.autoSimulation can be changed at run time?

[timid dove]

of course

[alpine delta]

yeah, thank you so much man

[small tendon]

hi,
i have gameobject that contains some colliders as chid ...
so, does OnCollsionEnter() working for that gameobject or have to this gameobject have a collider itself??

[shell adder]

the game object itself has to have a collider

[timid dove]

OnCollisionEnter on the parent works for child colliders

as long as the parent has a Rigidbody

[molten island]

not sure if this is actually a physics issue but i just have a sphere falling freely then sliding down a track. i have set the main camera to follow the ball via position and look at constraints. when i use either of the two constraints by itself, everything is smooth, but when i activate both constraints the ball/camera appears to jitter severely

[tender gulch]

is the ball rb set to interpolate position?

[molten island]

set to none

[tender gulch]

Try enabling it.

[molten island]

tried both interpolate and extrapolate and it still jitters

ball movement appears smooth when camera is in static position

[tender gulch]

How are you moving the ball?

[molten island]

just gravity via rigidbody

[hard furnace]

why doesnt transform.position work while physics are being applied?

[tender gulch]

Okay. And the camera is using the unity constraint component?

[tender gulch]

wdym?

[molten island]

yes, position constraint and look at constraint

[tender gulch]

Does the jitter happen if you just set the camera as a child of the ball?

[molten island]

no jitter though it creates the need to lock rotation as the camera spins with the ball

not rotation sorry but

the ball spinning changes the position of the camera globally (but not relative to the ball), like it orbits it

[tender gulch]

Interesting. The constraints component is only on the camera, right?

[molten island]

yeah, but the camera moves regardless of the constraints when it is child of ball

[tender gulch]

Yeah, I get that. What I'm asking is whether there's anything else on the ball.

or the camera

[vivid salmon]

Hey guys!

Anyone knows the right direction to implement custom collision solving to heightmaps? Mesh-based collisions won't work because I have a lot of problems with rigidbodies boucing off the edges, also I want something more smooth without increasing any kind of resolution, just pure mathematics.

I think I have something, if a point of the rigidbody is bellow the terrain height in (x,z) I move the rigidbody up based on this difference, but sometimes the rigidbody would still be bellow the surface because of some kind of async between rigidbody physics update and FixedUpdate, I'm not sure, but every frame the point would still be bellow the surface by a tiny amount.

Also, I'm using Rigidbody's position and rotation instead of transform, because it seens that every physics frame only the rigidbody transform is updated and then it applies to transform every visual frame, I think.

So what's the correct way to threshold a rigidbody point position so that it always will be above the threshold every physics frame?

[molten island]

ball is just rigidbody, camera is just the two constraints

[hard furnace]

@tender gulch if I have a force applied to my player or if they are moving the transform.position runs but the player returns to their position from before it did

[tender gulch]

Maybe try using parent constraint component instead. https://docs.unity3d.com/Manual/class-ParentConstraint.html

[tender gulch]

if you're doing it on the same frame, then it's not gonna work, because physics move the objects somewhere around the fixed update.

[hard furnace]

@tender gulch how do I work around that?

[molten island]

this seems to produce the same results as having the camera be a ball child

[tender gulch]

You don't - that's just how physics in games and unity specifically work. What are you trying to do though? Maybe there's a better way?

[tender gulch]

There are constraints on that component too.

[molten island]

my best guess is that the position offset it is using is local to the ball and not global, and im not sure how to fix that

[hard furnace]

@tender gulch I want to teleport my player to a previously saved location

[tender gulch]

And what does it have to do with physics and forces?

[hard furnace]

@tender gulch the jump is based on physics because I don't know how to do gravity without physics and cant find a tutorial

[tender gulch]

I mean, what's the actual issue? How does it prevent you from teleporting to a previous location?

[molten island]

yeah i can uncheck rotation but the isnt the issue. unchecking position just stops it from moving at all ofc. the problem is that it is staying in the fixed place relative to the balls local space, not the world space. so when the ball rotates and its local axis change direction, the offset position moves

[hard furnace]

the only reason I know the player teleports at all is because of a debug.log but immediately after the go to where they where before the position change

[tender gulch]

If you play with freeze rotation axis, you should be able to achieve what you want, I think.🤔

[tender gulch]

Oh, I see. How do you move the player?

[hard furnace]

@tender gulch like this

[tender gulch]

So it's not physics at all!

It's a character controller

[hard furnace]

the jump is

[tender gulch]

This is via the controller too!

[hard furnace]

it is?

[tender gulch]

controller.Move

[hard furnace]

oh. well that's good to know.

[tender gulch]

I don't remember why, but yeah, CharacterController has that issue, that it overrides transform position.

[hard furnace]

@tender gulch ok thx for the info i'll scour the internet thank you for your time.

[tender gulch]

@hard furnace share the code where you teleport it too.

[molten island]

couldnt seem to find a configuration that works, however im spending way too much time on a minor issue for a learning micro project so I'm going to move on. thank you for your help

[tender gulch]

And where you call Recall?

[hard furnace]

@tender gulch at the top of Update

I've also tried calling it at the bottom

[tender gulch]

Oh, didn't notice it

[tender gulch]

Does that work?

[hard furnace]

no, I think what you said was right about the character controller having it's own position tracker was true.

[tender gulch]

@hard furnaceHere's an explanation and solution:
https://issuetracker.unity3d.com/issues/charactercontroller-overrides-objects-position-when-teleporting-with-transform-dot-position

[hard furnace]

@tender gulch thank you

[grave pagoda]

hey guys i need some help applying some spring bones to my model can anyone help me please

[sinful marsh]

Say your problem, people will respond to that

[wise wind]

Hi im trying to sync a player models position to a physics objects velocity but I want to keep the player model always facing up and only rotating around the y axis (Hope that makes sense) This is the code I have currently (This is in Update) but it rotates around other axis not just Y

        //Set position of player model to the same as the Physics ball
        transform.position = new Vector3(ballRB.transform.position.x, ballRB.transform.position.y - 0.25f, ballRB.transform.position.z);

        // Rotate player direction to direction of travel
        if (ballRB.velocity.magnitude >= 0.2f)
        {
            Quaternion dir = Quaternion.LookRotation(ballRB.velocity, Vector3.up);
            Quaternion slerp = Quaternion.Slerp(transform.rotation, dir, ballRB.velocity.magnitude * bounceTurnSpeed * Time.deltaTime);
            transform.rotation = slerp;
        }

[grave pagoda]

that is my problem i need to apply spring bones to my model

[timid dove]

just project the velocity vector on the x/z plane

Vector3 velocity = ballRB.velocity;
Vector3 projectedVelocity = Vector3.ProjectOnPlane(velocity, Vector3.up);
Quaternion dir = Quaternion.LookRotation(projectedVelocity, Vector3.up);

[still stone]

anyone know how I can stop the player/capsule from being brought upwards by the ball? i'm just using addforce Acceleration on the x&z plane

[timid dove]

your video isn't loading for me, but could you constrain the player's Rigidbody position on the y axis?

[still stone]

I need the player to walk up the ramp and i'm sure that's not the proper way to go about this.
https://streamable.com/s0hwwx

[timid dove]

in effect the ball is also a ramp right

but it seems weird to me it's flying upwards that much

[still stone]

i don't see how when the pill collider shouldn't be stepping onto the ball

[timid dove]

can you show your code?

[still stone]

    void FixedUpdate()
    {
        //CancelUpwardVelocity();
        if (!mouseDown)
            return;
        destination.y = transform.position.y;
        targetVel = (destination - transform.position);
        targetVel = speed * targetVel * Time.fixedDeltaTime;
        var currVel = playerRb.velocity;
        currVel.y = 0;
        var diff = targetVel - currVel;
        var force = diff / Time.fixedDeltaTime;
        if (force.y > 0)
            Debug.Log("FUCK");
        playerRb.AddForce(force, ForceMode.Acceleration);
    }

somehow the angular velocity or the torque of the ball is bringing up the player

[timid dove]

can you show more code?

How is destination being set?

[still stone]

Plane.Raycast, clicking on a plane the player is in.

it shouldn't matter because i am taking out the y component in destination and in targetVel

i check if there is any upwards force being done, but I don't get that debug message

so the upwards force that is being generated by in-house unity physics

[timid dove]

yeah it's probably not your force that's pushing it up it's the collision

and/or friction

if the ball rotates there may be a friction force pushing your player up a bit

[still stone]

i have added a physical mat on the capsule/player that gives it 0 static & dynamic friction, same issue

[timid dove]

with friction combine set to minimum?

[still stone]

no, let me see

i think that fixed it lol

why would this be a thing when i gave it 0 friction?

[shell adder]

nice

[timid dove]

by default friction combination takes the average

so your player has 0, the ball has the default which is nonzero

the average is nonzero

https://docs.unity3d.com/Manual/class-PhysicMaterial.html

[still stone]

ah so if it collides with anything that has friction then it will average between my 0 friction and something's 1 friction lets say, giving the ball 0.5 friction?

now how do I raycast at the capsule/player feet to a wall?

i don't know what would be the best way getting the vector from feet location

besides using -rigidbody.y/2, which i probably will do i guess

i need to remove addforce into walls, so i will project onto a plane and have it slide against all steps/walls

essentially this https://www.youtube.com/watch?v=Q6LC1ubawCo

[shell adder]

you can get the bottom of the collider using collider.centre - collider.height
then to get the direction you can use rigidbody.velocity.normalised, and set the y to 0
and then multiply that vector by the distance of the ray you want

[still stone]

only problem is utilizing the right raycast distance, i assume i need to somehow get the thickness of my pill collider. but i don't see how that can work with dynamic players like rotated rectangles

[shell adder]

capsule colliders have the radius property

[still stone]

i'm going to be using multiple box colliders, like leaning forward with arms outstretched

once i learn how to 3d model lol

[still stone]

what is that vector supposed to be? the ground acting against my feet? or a vector of a wall opposing me?

[shell adder]

that vector is from the bottom middle of the capsule collider outwards in the facing direction

[still stone]

oh, normalized. i was reading normal vector

[shell adder]

you could have a vector3 that is transform.position + direction * aLargeNumber
and then you could do Bounds.ClosestPoint of a mesh collider of the player to get which point is going to collide first with a wall if the player moves in the current direction
then you can raycast from that

[still stone]

i'm sure the ground will always be the closest point

[shell adder]

closest point on the player's collider

if the case is that the player has an arm sticking out then the closest point will be on that arm

[still stone]

i imagine my colliders will look like this

maybe even a bunch of pill colliders

so the main body will be a big pill collider where the ground should be the closest point

[shell adder]

so in that case the red square is the far point, which is determined by the red arrow which is the direction of movement, and the end of the green line is the closest point

then raycasting from that green point will determine if the player is going to collide with a wall

[still stone]

the green arrow is the velocity of the player, wouldn't the red circle be the closest point for bounds vs the orange circle?

or is it that using ClosestPoint with the direction vector will ignore the ground completely because there's no y component on the vector?

[shell adder]

in this case the point where closestpoint will be determined from is directly ahead of the centre of the player, because it is transform.position + direction * [distance you want to look ahead]

so it will be somewhere around the edge of the orange yes

[still stone]

on the capsule collider, right?

[shell adder]

this would be easier to do if it was all one collider, so either that or one mesh collider

if it was separate colliders then you would have to run this check on each one, and see which is closest to the far point (the green circle)

[still stone]

you can't fuse colliders?

[shell adder]

in 3d i don't think so

but there are mesh colliders

[still stone]

i imagine the mesh collider will be tied to my character's animation

which i want to ignore and have non animated colliders

[shell adder]

the mesh itself and the mesh collider can be different

like the renderer can be animated but the collider stay the same

[still stone]

hmmm

[shell adder]

alternatively, and much simpler, is ontriggerenter

but where's the fun in that

[still stone]

apparently you can have compund colliders which collectively act as a single rigidbody https://docs.unity3d.com/Manual/class-Rigidbody.html see "Compound Colliders"

[shell adder]

yes but i don't think you can call Bounds on them as if they were one collider

[still stone]

i'll test it out and see 😄

thanks for the help btw

[shell adder]

np

[tender gulch]

each collider in a compound collider would have it's own bounds.

[still stone]

is there a way to make friction specific between 2 rigid bodies but not change the overall friction?

[timid dove]

give them special colliders for each other with the appropriate friction properties and set up layer based collision so they only hit each other

and have normal separate colliders for everything else

[still stone]

how do you setup a special layer based collision like that?

[timid dove]

https://docs.unity3d.com/Manual/LayerBasedCollision.html

[still stone]

thanks

[humble timber]

@here Hey there, I am working on a movement system for my game and I need help with implementing a good system for sliding on slopes with character controller. I want to create a realistic sliding system in which when you jump forward with an initial speed to a slope, you will slowly change direction to the ground. In my current system, when I jump on a slope, the player immediately changes direction to the ground, which is something I don't want. I will appreciate any help.

Basically, I need something like this: https://ophysics.com/f2.html

[still stone]

how can I check if my player is grounded? this doesn't work because it's a null reference and i'm sure this won't work with floors

    private void OnCollisionEnter(Collision collision)
    {
        if (Vector3.Dot(collision.rigidbody.position, transform.position) == 0)
            grounded = true;
    }

i'm thinking of raycast, but it's not perfect because the collider/rigidbody can be bigger than the playerCollision.size.y/2 used for raycast

I'm trying to stop the playing for addforcing into a wall using friction to stop themselves from falling. i want friction but not anti-gravity friction so i need to do a ground check

[still stone]

i feel that this is just too hackish

return Physics.Raycast(transform.position, Vector3.down, playerCollider.bounds.extents.y * 1.1f); // 110%

[shell adder]

i don't think a raycast is a bad way to do it, but i would have the ray start slightly inside the collider and finish slightly outside of it to have a skinwidth
you could also try something like a physics.overlapsphere instead https://docs.unity3d.com/ScriptReference/Physics.OverlapSphere.html

[still stone]

am I not able to get the contact point in O(1) for OnCollisionEnter?

afaik you need to for loop through Physics.OverlapSphere

i assume it would be the last collision in the list so collision.contacts[collision.contacts.length-1] could be the way

[shell adder]

if it's going to be overlapsphere with a ground layermask, and the sphere doesn't extend beyond the x or z of the collider then it can only hit the ground

so i don't think iterating through it is necessary

[still stone]

i'm not using ground layermask, seems like a hassle

[shell adder]

but it's a ground check

all you need is to detect the ground

[still stone]

but i want dynamic physics

where dynamic things are happening like maybe a piston hits you up, or you land on other balls

or you're on a vehicle moving on the rooftop

[shell adder]

so if you want to check for other things that aren't the ground then it isn't a ground check, so pass in the layers you want to the overlap

[still stone]

pass in layers you want to overlap?

i mainly need a boolean check for when to stop player control when in the air

[shell adder]

so you can have a LayerMask and add to it the layers that are considered ground, so 'Ground', 'Piston', 'Vehicle' whatever
and if the sphere is below the player and doesn't extend horizontally, then it's only going to hit things below it
so then you only need to check if the length of the returned array from overlap is more than 0

no need to iterate through the array

or you could use the NonAlloc version and check the returned int https://docs.unity3d.com/ScriptReference/Physics.OverlapSphereNonAlloc.html

[still stone]

wouldn't that be expensive to check per oncollisionexit?

since you're constructing a list and adding to the list by iterating through all game objects that have this layer?

[shell adder]

the nonalloc version is like the normal but generates no garbage

so it uses less resources

[still stone]

why not just do collision.contacts[collision.contacts.length-1] for OnCollisionEnter, then check if the dot product is 0 or close to 0?

i'll see if it works, if not i'll try the nonalloc

[shell adder]

yeah sure

[still stone]

this kind of works but not very well

        var contacts = collision.contacts;
        var dir = (contacts[contacts.Length - 1].point - transform.position).normalized;
        var dot = Vector3.Dot(dir, Vector3.down);
        Debug.Log($"dot: {dot}, dir: {dir}, down: {Vector3.down}");
        Debug.DrawRay(transform.position, dir, Color.red, 50);
        grounded =  dot > 0.9;

ah whatever, i'll just use layers

    void OnCollisionExit(Collision collision)
    {
        if (!grounded)
            return;
        grounded = collision.gameObject.layer == 9;
        //grounded = IsGrounded();
    }

though the exit part breaks

[still stone]

wouldn't this break if you have walls on the side of your character that are Layer Ground? also isn't this checking via a sphere vs your collider?

[shell adder]

so as i said you should not have the sphere's radius be larger than your player's, so horizontally it should be smaller so that it can't detect something next to it but only below
what do you mean by your collider

[still stone]

you're not using your collider instead of this sphere hitbox/collider

[shell adder]

if you want to just use the player's collider then you can check if the collision's layer is 'ground' on exit or enter

this sphere is if you want to check below the player by a certain amount

[still stone]

yeah i'll probably do what you're saying, though I think the sphere needs have a smaller radius at your feet so it doesn't come into contact with walls that are ground layer by accident

so your collider blocks the sphere at your feet from touching walls

[shell adder]

if it's a capsule collider then you can set the radius of the sphere to be the capsule's radius minus a little

just to be safe

[still stone]

are physics and player controllers the hardest part of making a game?

because i'm astonished how many issues/bugs there are with this lol

[bleak umbra]

physics player controllers are always glitchy, thats why "everybody" builds custom controllers with kinematic physics

[shell adder]

they're a fundamental part of it so you need to get it right for sure or else you don't have a game

some people find it easy, some don't

it also depends on how complex it is

[still stone]

well i never took any gamedev courses or read books on it

so i don't know how to handle a lot of things properly or its physics

[bleak umbra]

its easiest to not use "realistic" physics at all for gameplay

[still stone]

i imagine if i actually took gamedev courses in my comp sci program, i would probably understand how to deal with a lot of these issues i'm having lol

[bleak umbra]

very unlikely, a CS course cant teach you nearly enough

maybe you can draw some neat space filling curves or rotate a camera, but other than that... this is a learn-for-your-self type of thing

[still stone]

you are unable to check via Length to check there are 0 ground layers or not in the sphere as you pass a pre-allocated array that has a pre-set Length. I find even check colliders[0] == null doesn't seem to work either

i.e. Physics.OverlapSphereNonAlloc(bottom, radius, cols, 9); isn't picking up layer 9 even though it should be

or am I supposed to do 1 << 9?

oh that was it...

[still stone]

Still having issues trying to stop adding force if the player is stuck on something. Capsule/player flings off steps/walls too easily

i thought having a raycast done at a lower position would help but then the raycast doesn't register because it's in the ground

[spiral tulip]

you can just check whether it's touching a wall using a collider

tag the wall and check in OnCollisionEnter

[still stone]

walls can be ground, so i can't use tags

[spiral tulip]

wdym walls can be ground

[still stone]

if you see the ramp in the video, that ramp can be wall + ground

[spiral tulip]

then just don't tag it as wall

tag it as ground

[still stone]

but then it will still fling up

[spiral tulip]

hmm not really sure what you mean

i think i misunderstood the flinging thing

[still stone]

it shows in the vid when i make the capsule move into the ramp at the bottom, it gets caught on the ramp and the extreme horizontal force forces it to fling up because of the capsule collider getting over the step

[torpid epoch]

I just realized that this may be a better thread for my problem than #archived-code-general - I have a wall that's supposed to pivot around a point. I used a hinge joint for this. It spins properly when the transform rotation is set to 0 or 180, but if I try to set the transform to 90 or 270 it gets stuck. Any ideas?

Actually looks like setting the transform rotation to anything other than 0 or 180 breaks it

[still stone]

I made it so my capsule slides along walls, but when the vector reaches a corner then it stops working as the raycast isn't detecting a wall anymore. Any advice?

i have no way for sure checking if my capsule is colliding with a wall in my function unless I raycast all around me and check if i'm colliding...

at this point i'm considering of having an array of collisions that i update with OnCollisionExit/Enter

[tender gulch]

What are you even trying to do? Make a custom physics engine? 😅

[still stone]

i'm trying to fix all the bugs i'm having D:

[tender gulch]

Try a CapsuleCast perhaps? Instead of a raycast

[still stone]

but then i'm reliant on using a CapsuleCollider

maybe a SphereCast but providing the largest boundary?

[tender gulch]

I guess a sphere cast could do as well, anything that has a radius and not just pin point.

I still don't know what you're trying to achieve, so I might be wrong.

[still stone]

the problem is that i don't want the capsule/player to fling around corners of walls or slingshot off steps like the bottom of that ramp

because there's a large force being applied by clicking and dragging your mouse around which tells the capsule where to go

so if you apply a huge horizontal force and the capsule hits a speed bump, it will fly upwards

so i need a way to check for speedbumps and corners of walls so the sling shotting doesn't happen

i like the control scheme as is, but i don't like this sling-shotting/flinging coming from the collider getting stuck on the environment

i feel that the corners of walls can be fixable, but the speed bump bug is impossible because if you raycast so close to the ground then the raycast will hit the floor itself instead of the speedbump

@tender gulch the slingshotting

err i cropped i video, so this is the exact moment

maybe playing around SphereCast will fix it...

but i thought this is a common issue with rigidbody player controllers so someone might know how to fix it

[tender gulch]

Maybe detect the ground level in direct proximity to the capsule, instead of where the mouse points?

[tender gulch]

You don't usually use rigidbodies with mouse controllers.

[still stone]

could you elaborate?

[still stone]

well i didn't want to code everything from scratch and wanted the player's colliders to move the ball

also, aren't FPS games rigidbody player controller based? Why don't they have these issues?

[tender gulch]

Neverminded. I assumed something about your implementation that's probably not the way it is.
What could be relevant though is that you increase the force the farther away the pointer is, right?

[tender gulch]

Because they always apply the same force no matter the direction. They also often just control velocity. Some of them might be using CharacterController instead.

[tender gulch]

Why not use a navmesh agent?

[still stone]

What could be relevant though is that you increase the force the farther away the pointer is, right?
I do, I find the controls become very response and intuitive given that there are no obstacles that glitch it

navmesh agent?

[tender gulch]

Well, that's probably the problem. I don't think it's a great solution. At the very least, you should clamp the force magnitude to some maximum value and also probably take into account the current velocity of the character to not make it jump from 0 to max in 1 frame.

[tender gulch]

Yeah, navmesh, you know? The usual way you'd handle click and move movement.

[still stone]

i never learned it in the junior programmer pathway

i'm new to gamedev, i just know how to program

[tender gulch]

https://learn.unity.com/tutorial/unity-navmesh

[still stone]

if that's for AI pathfinding why would that help with player controllers?

[tender gulch]

Yeah, there are way more features in unity. You should explore different approaches.

[still stone]

i don't even know how to find them without being told about them lol

[tender gulch]

Well, if you want a click and move movement, then it's 50% ai.

[still stone]

hmm

i might do that if this keeps becoming a pain

[tender gulch]

I think it's possible to configure your controller if you take into account the things I mentioned.

[still stone]

even if i clamp the force, the unity engine will still treat speedbump like a launch ramp converting the horizontal force into an upward trajectory. it just won't slingshot up as high

[tender gulch]

Limit the max force you apply based on the current velocity of the character.

if it's small enough, it won't be able to go up. I think

another way, is not using a capsule but a box for example

[still stone]

in what manner? force * playerVelocity.magnitude?

[tender gulch]

Yeah. And maybe use a curve too, if you want it to be more responsive.

[still stone]

a curve? so a log function?

[tender gulch]

force = max force * velocity/ max velocity;

[tender gulch]

You could use an AnimationCurve to configure it in the editor however you want.

[still stone]

i don't understand what you mean by curve. you mean to configure the acceleration?

[tender gulch]

force = maxForce * curve.Evaluate(velocity/maxVelocity);

[still stone]

i mean you could do a squareroot function, but squareroot is expensive for computers

[tender gulch]

velocity/maxVelocity gives you a value from 0 to 1. You can use a curve to remap the value in a desired way.

[tender gulch]

Sure you can, but you probably want it to be more customizable and adjust it manually/visually in the inspector.

like this

[still stone]

that's a component? I'm not finding it

[tender gulch]

It's not a component. It's a unity class that can be serialized

AnimationCurve

https://docs.unity3d.com/ScriptReference/AnimationCurve.html

[still stone]

woah

damn, all this is really helpful

[tender gulch]

Yeah, it can be pretty handy at times.

[still stone]

i think the sphereraycast + velocity checks should fix mostly everything

[tender gulch]

Perhaps.

[still stone]

@tender gulch i think the velocity limiter helped, though it's still launching over speed bumps

[desert wave]

You can try checking if it can go over that

With raycasts

[still stone]

yeah last thing to do, but i'll save it for tomorrow as it's 2 am here

plus i gotta actually study for some job interviews i got coming up

[still stone]

@tender gulch in case you were interested https://simmer.io/@Davidj361/ball-pusher

[upper sparrow]

anyone have any advice on how to add controls to balance a 2d capsule, to push it left and right, on a flat surface as challenge?

[still stone]

use Rigidbody.MovePosition or Rigidbody.AddForce. avoid manually changing velocity as it can mess with physics, also transform.position should usually be for reading, not modifying

[upper sparrow]

ill try that and get back to you

dont know if im doing it wrong, but it still isnt working

btw im also using a hinge joint as the balance point

[spiral tulip]

did you debug.log the value of horiz in Update to make sure you're not multiplying by 0?

[upper sparrow]

yeah

it changes from 1 to -1 depending on the keys i press

[spiral tulip]

and did you debug.log the value of moveSpeed in FixedUpdate

[upper sparrow]

yeah also from -20 to 20

[spiral tulip]

and debug.log the value of rBody.velocity at the end of FixedUpdate?

[upper sparrow]

ill try that

its staying at 0

but does addforce directly affect velocity?

[spiral tulip]

congratulations you've narrowed down where the error is, that's 80% of solving the problem 👍

[spiral tulip]

yes

[upper sparrow]

oh

[spiral tulip]

next step is to debug.log a right before rBody.AddForce

to make sure you're passing the right vector AddForce

[upper sparrow]

it stays stuck at 0.4,0.0 and -0.4,00 depending on the arrow key i press

[spiral tulip]

is that what you want?

wait hang on lmao

that feels way too small

[upper sparrow]

yeah i would suppose it should be greater

[spiral tulip]

try multiplying it by like 1000 or something before passing it to AddForce and see if it moves

sometimes it is actually moving, you just can't tell bc the force is too small that happens to me a lot

[desert wave]

try other force methods

if you get a different type of movement

[upper sparrow]

it stayed the same when i changed to speedfactor to 1000

[spiral tulip]

hmm

[upper sparrow]

but when i removed the deltatime multiplication it kinda worked

[spiral tulip]

maybe the issue is friction with other bodies?

oh ok

maybe make speedfactor like 1 million lmao

seems hacky but whatever works, i guess

[upper sparrow]

oddly enough it seems mulitplying it by Time.deltaTime just totally restricts it to 0.4

[spiral tulip]

weird

[desert wave]

and btw why do you use time.deltaTime?
use Force.Acceleration

[spiral tulip]

using Time.deltaTime makes the movement the same speed across all computers regardless of cpu speed

[desert wave]

thats update problems, fixed update runs at a constant speed

[spiral tulip]

ah yes i missed that it was in fixedupdate oops

in that case definitely don't use time.deltatime

[upper sparrow]

where should i use it?

[desert wave]

rb.AddForce(a, ForceMode.Acceleration);

[spiral tulip]

https://docs.unity3d.com/ScriptReference/ForceMode.Acceleration.html for reference if u want it

[upper sparrow]

i think i can only use ForceMode2D

cuz im using rigidbody2d

and there doesnt seem to be a ForcceMode2D.Acceleration

[desert wave]

well do rb.Addforce(a*rb.mass);

[upper sparrow]

thanks, seems to be working well without the deltaTime

ill just mess with variables to control how fast i want it to rotate

[desert wave]

np, good luck

[lilac lintel]

Anyone know how I can prevent my particle system (shield bubble around the character) from moving after a collision? The Transform is 0,0,0 after collision but the mesh keeps moving. If I stop/play it's always reset back to the original position.

[spiral tulip]

set the position to world position instead of local position, it should be an option in the particle system component somewhere i forget where exactly

oh wait i see it

simulation space

in the first menu

[lilac lintel]

yea i tried that, i actually wanted to use custom and set to the player transform but the bounding sphere is totally wrong then. Either way none of those options seems to have any effect 😦

i also tried playing with Limit Velocity over Lifetime... also seems to have no effect.

also collision > dampen etc seem to have no effect

[spiral tulip]

oh huh

[lilac lintel]

crazy right? 😄

[spiral tulip]

did you try making the particle system a parent of the player

ik that seems weird but it could work 🤷

[lilac lintel]

no but it does work with custom to some degree, its just that the bounding sphere is a bit off. but its ok i dont need it to be stuck to the player, its fine if it's in a fixed position, probably better for GPU in VR anyways 😉

[spiral tulip]

ok well you decide what works best for your project 👍

[lilac lintel]

i just need it to not move when something collides with it 😦

[spiral tulip]

you could remove the collider

what do you need the collider for? is it completely necessary?

[lilac lintel]

yeah its a shield, to block stuff from hitting the player

[spiral tulip]

i see

you could make it a trigger and manually remove or repel objects in OnTriggerEnter

[lilac lintel]

im also reflecting stuff OnParticleCollision()

[spiral tulip]

idk if it's possible to make particle colliders a trigger but if it is, try that

then reflect stuff in OnParticleTrigger or whatever the equivalent is

[lilac lintel]

i basically am doing that already 🙂

repelling stuff with OnParticleCollision()

[spiral tulip]

yeah but the difference is that triggers don't physically collide with anything

so you could have the same effect without the system getting pushed by other bodies

[lilac lintel]

i'll have to investigate that, dunno if i can get particle system triggers to work the same but its a good tip, cheers 🙂

[spiral tulip]

ok gl!

[hardy tulip]

should I use update or fixed update for applying a force on a rigid body player when the wasd keys are pressed?

[shell adder]

you should use update to register input, as doing that in fixed can miss some inputs, but you should use fixed update to apply the force since that will be in time with the physics simulation
and to get information between the two you can store the input as a global Vector2 in Update and then use that for applying force in FixedUpdate

[hardy tulip]

i see

thanks

[delicate birch]

hi guys, I had a problem on meshcolliders, my terrain is made by meshcolliders , when my character(with rigibody) walking on it(use add force), it bumps a little on the seam of meshcolliders, even it is absolutly flat. both my terrain and character have physic material with no fiction ot bounciness. any way to fix this?

[molten island]

so i have a rigidbody2d the starts frozen on the y axis, then the y axis is unfrozen (constraints set to none). now, it should be falling at this point, but it stays until interact with the constraints in the inspector (doesn't matter which one. i could tick freeze rotation and suddenly it starts falling)

[molten island]

nevermind, I had to set the object to never sleep

[vapid ore]

so i tried to make a steering script and now the steering works but the problem is after i made that script this started happing

[jaunty star]

https://imgur.com/Yo0SL4w

[jaunty star]

can someone help me how to make the character slide like this?
the tutorials were useless
help plz

[still stone]

i think if you take the velocity of the player * normalized vector of player's aim

anyone know how I can detect walls? I'm using this but the spherecast ends up in the middle of the wall sometimes and doesn't detect a wall...

Physics.SphereCast(bottom, playerCollider.bounds.extents.x*1.1f, rayVec, out hitData, rayDist, ~(1 << 6 & 1 << 8))

[spiral tulip]

why are you detecting walls and how are they positioned? normally i would use a raycast so i'm wondering why you can't use that

[still stone]

because i want to slide against walls and also stop adding force into a speed bump that causes my player to fling of them

[spiral tulip]

oh right i remember that

you could do a 4-way raycast that might work better than a spherecast

[still stone]

oh wow, i think my mic below my computer picked up electromagnetic interference from my GPU

[still stone]

4way raycast?

[spiral tulip]

yeah 4 raycasts: in front, behind, right, and left

[still stone]

i mean what i'm doing would serve the same purpose, but i notice that if the spherecast location is inside the wall then it doesn't detect a wall

Physics.SphereCast(bottom, playerCollider.bounds.extents.x*1.1f, rayVec, out hitData, rayDist, ~(1 << 6 & 1 << 8))

[spiral tulip]

if you have colliders on the walls and the player, you shouldn't go into the wall

you could make a second slightly larger player collider to serve as a buffer for the walls only

and set layer collisions off for other layers

[still stone]

i mean they already don't go into the wall, not sure what you mean

[spiral tulip]

if you don't go into the wall, why is the spherecast inside the wall

just cast it from the player's position and it won't

[still stone]

i think this is the spherecast, i tried using Gizmo drawsphere but this is what the spherecast should look like:

[spiral tulip]

looks like its origin is outside the wall so what's the issue?

[still stone]

spherecast isn't detecting a wall apparently

[spiral tulip]

try casting from the player's position

it doesn't look like it's at the player's position

[still stone]

it's at the bottom of the player's "feet" but i had to give it a distance of 0.1f because i can't give a distance 0 as it doesn't work

Here's the vid of the issue, it has working wall sliding but when the player goes too fast into the wall then it doesn't work

maybe i need to make the spherecast radius smaller

[spiral tulip]

sure sounds like a good idea

also don't make it at the player's feet

you should cast from the center of the player

[still stone]

i think i'll just give up the the speed bump flinging issue

i'll just focus on polishing this wall sliding

i don't get why spherecast doesn't work if any part of the sphere is already inside an object because that means i can't spherecast with a radius of my player's height

[spiral tulip]

that can't be the issue

if the sphere wasn't touching anything it would never detect anything

there has to be a way to cast and have it collide with objects lol that's the whole point of it

[timid dove]

don't use speherecast, use OverlapSphere

[still stone]

but how can i get the contact point and the normal of that?

since it returns Colliders

[spiral tulip]

do you need the contact point?

[still stone]

well i need to know where the OverlapSphere is touching and i want to calculate the normal of that

[spiral tulip]

but why do you need that

[still stone]

because i need to project my movement over the normal

[spiral tulip]

wut

[still stone]

if you project your movement vector over the normal of the wall it will make you slide https://www.youtube.com/watch?v=Q6LC1ubawCo

[timid dove]

Start your spherecast at the top of the player's capsule and send it down

[still stone]

can OverlapSphere not provide the normal vector that i need? not sure if it's possible via the Collider objects it gives

[timid dove]

it doesn't provide any normals no

not sure how such a thing would make sense with overlapsphere

[patent briar]

Hello, I am creating a 2D game.
I got a problem with combining triggers and colliders. What I have are 3 layers: Unit (players and enemies), Environment (platforms) and Collectible. Environment are static objects, and both Units and Collectibles are objects with rigidbodies, having gravity, etc. So all 3 groups of objects need to have colliders to prevent Units and Collectible fall through Environment. However I also need to make Units "walk through" collectibles, if they cannot pick them. If I remove Unit/Collectible from Physics 2D matrix in project preferences, I also make them unable to recognize their triggers, so Units cant pick Collectibles onTriggerEnter2D.

Best solution would be if this Physics 2D matrix affected only colliders, but triggers would work for any layer (I can then resolve its effect myself), but that doesnt seem to be an option. Does anybody know the correct sollution for this? Pretty please? 🙂

[timid dove]

you can put the different colliders on different layers

like have a non-trigger collider for the item so it doesn't fall through the ground, and then a separate trigger collider so the player can pick the item up

and have them on separate layers and set up the layer matrix appropriately

[patent briar]

Yeah, that was my backup plan, but it doesnt seem right, since I would then need duplicated every layer, something like Unit_Colliders, Unit_Trigger, etc... 😦

[timid dove]

Only the item needs two layers in the system I described

[olive fog]

Is there a way to make it so particles stop being affected by physics after a first collision?
I have snow particles falling on a slope and I want them to "stick", not slide down

[icy kernel]

Hey, im currently trying to implement wall jumping and its mostly implemented just it should bounce back the opposite way and its not doing that currently

It just jumps on the wall and slides down then slides away horizontally, when it should jump off of the wall the other way. Here is the code: https://pastebin.com/D6SFUckk

the wall jump code is at the bottom

[patent briar]

Well, I guess I have no other choice. Still I would expect Unity to handle this better, I dont really belive this is the most correct solution.

[timid dove]

How would you like or expect it to work better?

[patent briar]

Some settings that enables triggers to work for all layers or to split colliders and triggers in Physics2D settings.

[hollow topaz]

I have a question about Rigidbody constraints. I have an object that shouldn't move in the z axis (that works fine) and shouldn't rotate on the x axis (doesn't work). I don't understand because if the game is running and I enable constraint on the y rotation then the object stops rotating on both but when I disable the Y rotation constraint both remain constrained. Any Ideas?

[vapid ore]

How would i make it so it goes back up by its self?

[timid dove]

You can affect the rotational velocity of an object with AddTorque

[humble timber]

Can anyone help me with this?

[stuck bay]

why dont you use ragdolls? i guess your using no physics at all right now

hey i have some problem with ontrigger. its just not detecting ALL of my collisions when they happen to fast

is that because of some other scripts that are taking to long to process, or is it due to physics settings, or is untrigger unstable when it comes to fast objects?

[vapid ore]

my scripts where fine and now i get this error

[hollow echo]

https://docs.unity3d.com/Packages/com.unity.inputsystem@latest/index.html?subfolder=/manual/Migration.html

[stuck bay]

so i used 10 colliders instead of one large scaled one and its working now. why is that a deal?

damn its still unstable with large stacks of collisions

[vapid ore]

i still dont get it

[hollow echo]

Your project is using the new input system, your code is still using the old.

[vapid ore]

so how do i make it so they update

[stuck bay]

why is the damn ontriggerexit not working?! this is pure horror

[hollow echo]

https://help.vertx.xyz/?page=programming/physics-messages

[stuck bay]

my problem is that ontriggerenter works but ontriggerexit is not working all the time

[hollow echo]

Weird

[stuck bay]

my timestep is already at 1/30 so i have higher collision detection

my projects is based on physics and i have tousands of colliders and rigidbodies in my scene

[shell adder]

if the issue is with collision detection then have you tried setting the one of the colliding rb's with Continuous collision detection and the other (the one that moves) with continuous dynamic

[stuck bay]

no i will try that. now i store the colliders in a list, but that is so stupid

[stuck bay]

but both colliders are moving

and yea i tried to change the mode for one object, but not for both

[stuck bay]

but i also dont want to set the mode to continuous with a tousand rigidbodies in my scene

[stuck bay]

its working much better now with both objects set to continuous , but still i need to have a list

[shell adder]

you can have continuous speculative mode, it's less accurate but more resource efficient

[shell adder]

oh ok

or you can have some type of method where you occasionally do a spherecast to check if a collider is nearby, and if it is then turn on continuous / continuous speculative

that could save some colliders from being continuous if they're further away

[lilac garden]

https://answers.unity.com/questions/1189707/oncollisionenter-being-called-without-the-collider.html I have this issue where my player not-visually collides with objects behind it that are somewhat close. I have many OnTriggers and OnCollisions. What should be my next step to fix this issue and future proof this?

[lilac garden]

Figured out that the Default Contact Offset was something like 1e-08. Documentation states: "Set the distance the collision detection
system uses to generate collision contacts. The value must be positive, and if set too close to zero, it can cause jitter. This is set to 0.01 by default. Colliders only generate collision contacts if their distance is less than the sum of their contact offset values". Changed to 0.01 and it's solved.

[stuck bay]

Can someone help me make my character sprint?
here is the script

[weak gull]

My character controller uses rigidbody.velocity to move the player, and whenever I move horizontally while on a moving platform (that is the player's parent while hes on top) the player stops moving with the parent. When I jump, again setting rigidbody.velocity, the player still moves with the platform. If the player stays still the moving platform moves the player without issue. The whole game takes place on a moving platform so it's kinda a big deal that it works, does anyone have any insight into what I'm doing wrong?

[spiral tulip]

don't make the platform a parent of the player

[weak gull]

how do I make the player move with the platform then?

[timid dove]

yeah - when you set the velocity directly you... set the velocity

that overwrites any velocity your character may have picked up from friction with the platform

[weak gull]

ok, I'll switch it to transform.translate or something I guess, thanks

[hollow topaz]

Are unity's rotational constraints not working for anyone? Because I am having trouble with them in my current project so I created a new project on the latest version of unity and it still doesn't constrain the rotation axis.

[timid dove]

that's going to be even worse...

[timid dove]

want to elaborate on what you're trying to do and how you're trying to do it?

[hollow topaz]

I am creating a physic Ik character that is 3d but the game will be viewed 2d, this means the character should not rotation on the X axis. the problem I am having is the rotation constraint of the rigidbody of the parent body doesn't stop the character from rotating on that axis. plus I have tested a cube object in a new project and freezed the same x axis and it still doesn't freeze it.

[timid dove]

The Rigidbody constraints will only prevent the physics engine from rotating your object on that axis

if any other code or components do it, it will not stop them

for example if your IK controller or other scripts do it, it will not stop that

[hollow topaz]

there is no code touching that axis

in this test project there is no code all together and the transform still shows the object is rotating on that axis

this is the test project, the x rotation axis is constrained and yet it still rotates

[crisp panther]

Hi all,
I was wondering,I have bunch of static colliders on multiple objects that I want to group together as a single entity so it can hold an OnCollision handler on a root object. The only way I know to do this is to add a kinematic rigidbody on the root object. However the doc says that static colliders are colliders with no rigidbody, so how are these static-but-not-quite colliders treated by the physics engine? Kinematic colliders, or Static colliders? Does it make any difference at all if I remove the static flag on those objects and just have them be a kinematic object that simply never moves?

[supple sparrow]

I see a star next to the filename. Could you save the scene, just to be sure ^^

[timid dove]

The "static" flag on the object is irrelevant here.

If you have the rigidbody it's a kinematic collider
If you don't it's a static collider.

[weak gull]

It was. Now i'm done changing everything to rigidbody.moveposition and it works. I wish I read your comment earlier.

[stuck bay]

its much less acurate on android

i have 5 ghz cpu. its running at 300 fps on my machine

damn

i cant have realtime log from android on my pc. that is f**d

[past grail]

I want to rotate my object so that it is parallel to my collider all the time. I am emitting a ray and find the angle between hit.normal and myObject.transform.up. And how to rotate an object knowing this angle? Thanks

[spiral tulip]

if you want to set the rotation to that angle, just do transform.rotation = rotationYouCalculated;

if you want to rotate by that angle, do transform.Rotate(rotationYouCalculated);

[vapid tree]

Hey! I've been working on a player rigidbody controller and have come across an issue that I need to solve. The script uses rigidbody drag to slow down the players movement, however this means that when the player is jumping that their fall is slowed. Is there some way to make drag only effect x and z movement, or another way to slow down the player that doesn't use the rigidbody drag.

[lilac garden]

Drag How much air resistance affects the object when moving from forces. 0 means no air resistance, and infinity makes the object stop moving immediately.
Either you slow down player speed, increase gravity or exert an opposing force to the players velocity (times) a certain dragMultiplier. For example, you have an rb.velocity vector of (1,1,1), you can then rb.AddForce(-.5f, 0, -.5f).

[vapid tree]

Thanks for the help!

[cobalt pilot]

how do I make my rigidbody that has some joints attached to it, not be dragged down by objects that are hanging from those joints.

I still want to be able to set the velocity and stuff so can't make it kinematic

[timid dove]

that's kinda what joints do though

[viral ginkgo]

@cobalt pilot how about you lerp the velocity instead

rb.velocity = Vector3.Lerp(rb.velocity, targetVelocity, 0.1f);

[timid dove]

one thing you could maybe do is make objects that are not children of your Rigidbody but do follow your rigidbody and are kinematic at those attachment points. Then attach your joints to those follower objects.

[viral ginkgo]

I often do something like this to also make it more realistic via limiting the equilevent impulse per frame

Vector3 targetVelocity;
float maxImpulse;

Vector3 currentVelocity = rb.velocity;
Vector3 nextVelocity = Vector3.Lerp(currentVelocity, targetVelocity, 0.1f);
Vector3 delta = nextVelocity - currentVelocity;

rb.velocity = Vector3.clamp(delta, maxImpulse) + currentVelocity;

[cobalt pilot]

Why woukd I do that

[viral ginkgo]

setting the velocity part

but looking more into it, thats probably not what you want

hmm actually yeah

if you do this velocity control on the main object

and it has a few other objects trying to drag it down

it should be able to maintain the altitude

[cobalt pilot]

isnt that just going to fall down sstill?

cuz it's set at 0.1f

so its almost the same as the original velocity

[formal geode]

Hi, for some reason my particle effect collision isnt working. It was working just fine one another one I was testing before.

It just phases through walls. Although it works with planes, but thats not what Iam going for

[cobalt pilot]

@viral ginkgo how does that work since it's not compensating for the force pulling it down is it?

[viral ginkgo]

lets say you want it to follow a trajectory

or a position

targetPosition

you set targetVelocity = targetPosition - transform.position

[cobalt pilot]

yes

[viral ginkgo]

and feed to my code

and you'll follow the position

it will follow a little below

like 1 meter maybe

and it will compansate

[cobalt pilot]

I see

Ill try it out, don't completely understand it yet

it does not compensate for the force and is still dragged down

[timid dove]

did you try my suggestion

[cobalt pilot]

well if I have it follow that object then it will also just move with the object when dragged down no?

[timid dove]

why would the object be dragged down

there's no force pulling it down in what i described

[cobalt pilot]

ooooh I understand now

yes Ill try that

that makes it very stuttery for some reason

[stuck bay]

Hello, quick question, for some reason my instantiated object falls slower than a normal one and I have 0 idea as to why.

Vehicle =  Resources.Load<GameObject>(MenuScript.Vehicle);
        Instantiate(Vehicle, Hitbox.transform.position + new Vector3(0,10,0), Hitbox.transform.rotation);

[timid dove]

you probably have a script on it that affects the velocity

[stuck bay]

Now I'm even more confused since I don't remember changing any velocity / gravity values, I guess I know how I'll be spending my weekend

[timid dove]

SHould be very easy to find

Don'y you have some kind of movement script on the vehicle?

[stuck bay]

It was actually a box collider being right inside of the vehicle's collider haha

[honest granite]

i have a shoooting script spawning bullets with rigidbody runing into an enemy which also has a rigidbody

but the enemy gets confused bc it gets pushed by the bullet and it meses up the ai

how do i fix it?

[spiral tulip]

make the colliders triggers, then use OnTriggerEnter in your code instead of OnColliderEnter

you can also make one of the colliders a collider and the other a trigger so that one still collides with other things, just not with the enemy

[stuck bay]

I have a problem... I have a gameobject that has a character controller (of course it has its own collider) .. and in one of its children i have added a collider too... I need the child's collider to be bigger than the parent's one ... here is the problem :: IN GAME MODE THE CHILD'S COLLIDER DOESN'T WORK it goes inside other colliders ... any help on how to solve this problem

[stuck bay]

where it stops is where the character controller collider hits (it is small and in the center of the object and the big collider is on the child game object)
and the rotation is done by a script put on the parent object

[small sundial]

i have two colliders on different objects: a small sphere collider on a projectile object and a player sized capsule on a player object. in the layer matrix, the projectile will not collide with the player. how can i get a bool (or an event) when the projectile is intersecting the player?

ping me if you have a solution

[timid dove]

CharacterControllers will only use themselves (the capsule) to determine their own shape for collisions

[timid dove]

Since you have disabled collisions between those two layers, you will not be able to detect their intersection

Re-enable collisions between those layers to get collision events between them

[small sundial]

hmm is there another way to detect collisions without a projectile being able to fling a player out of the map?

and yes, i am developing your average fps

[timid dove]

Yes you can use a trigger collider

you can detect the overlap without them physically affecting each other

[small sundial]

oh thanks

[timid dove]

Look up OnTriggerEnter

[small sundial]

so triggers have no collision?

[timid dove]

they have no physical collision

they just trigger your code

[small sundial]

ok

[stuck bay]

yes i dont mind that but I also need other colliders to be working ... but they are not

[timid dove]

working in what way

like what are you expecting it to do

[stuck bay]

i am expecting that when the colliders hit other colliders of game objects to not interfere with them... look at the picture i uploaded above, half of the capsule collider (which is used on the child game object) is inside the wall which has a collider as well

[stuck bay]

this one

[timid dove]

If that's not the capsule of the CC itself, the CC will allow that collider to go through the wall no problem

also if it's just a child object of the CC and there's no Rigidbody involved at all, that's just a static collider

[stuck bay]

it is not the collider of the CC, but also I dont want it to go through the game object and I did try to add a rigid body to the game object but it still didn't work

by game object I mean the wall

[timid dove]

If you want that kind of behavior you need to either:

• do your own custom capsule-casting solution
• Use a Rigidbody based character controller instead of CharacterController.

[stuck bay]

what do you mean by do your own custom capsule-casting solution

would a rigid body based character contoller let me use several colliders that will work simultaneously ?

[timid dove]

I mean each frame when you want to move, do a capsule cast to detect if there's a wall there and only move as far as any collision you see if there is one

[timid dove]

yes

you can put as many colliders on child objects as you want with a Rigidbody and they will all be considered part of the body

[stuck bay]

may you give me the function that does so or the unity documentation

[timid dove]

https://docs.unity3d.com/ScriptReference/Physics.CapsuleCast.html

[stuck bay]

thank you

and just to make sure , if the parent and child capsule colliders dont collider and one of them isn't inside of the other , they still wont work?

[timid dove]

that was a lot of negatives lol

Are you talking about for the Rigidbody strategy or for a custom Capsule-casting approach?

[stuck bay]

no

i wanna make sure my current solution wont work at all

[timid dove]

Just using a CharacterController it will only respect the main capsule of the CC itself

no other colliders will be considered

[stuck bay]

thanks for making it clear

[solar charm]

howdy, just a quick question

how do i add force without intruding in the rotation?

i wanna move with addforce but i wanna keep the player rigidbody rotating in whatever direction it was rotating

[inner cloud]

in my fps i shoot a raycast from the player's view to interact with things, to avoid colliding with myself i use RaycastAll and bail when the hit is a child of my player, this works well but when i stand on the object to interact and try to interact with it looking straight down its the FLOOR that comes first in the raycastAll is this a bug ?

[coarse veldt]

The order of raycastall is undefined. You'd have to sort by hit.distance (or just search through for the closest)

[stuck bay]

Hello, is there anyway to update colliders positions, rotations and scale in the game if the Time.deltaTime is set to 0?

to be more specific I have an issue where I have an editor mode in my game that set the Time scale and delta time to 0, and I need to detect when my player is touching an object so I used physics.raycast to get an object at the position of the player touch but when I move this object the raycast doesn't seems to update the colliders positions and therefore it doesn't work properly

[timid dove]

This is the default behavior of AddForce. It adds the force at the center of mass resulting in 0 net torque.

[timid dove]

How are you moving the object?

[stuck bay]

nevermind, I figured I could use Physics.Simulate() to update the colliders, it works now, thanks!

[timid dove]

I think maybe you need to call https://docs.unity3d.com/ScriptReference/Physics.SyncTransforms.html

If you call Simulate () then the rigidbodies will actually be simulated for one physics frame

Probably not what you want

[stuck bay]

yes that's not what I want ah ah, well I'll try this method

works great! thanks!

[ripe estuary]

so i'm learning colliders and rigibody in 2d. And i'm noticing if i take corners too tightly it'll mess up the orientation (i think) of the player object? Like it'll mess up which directional keys move which directions. Anyone know why this happens?

here's a small recording. You can see based on the animator which direction i'm suppose to move and that it works till i interact with the walls too much.

player character is the pacman in the middle

i'mma gonna go out on a limp here and assume it's cause I use transform.translate

[ripe estuary]

yep switching movement to velocity based worked

[craggy grove]

Hey - has anyone here ever projected a kind of "curve" based on where an object is going where they predict a possible upcoming collision?

I'm trying to find resources. Anything pointing along the way would be appreciated.

[timid dove]

yes indeed. Basically just take the object's velocity, and Physics.gravity and Time.fixedDeltaTime and simulate what the trajectory will be for each upcoming physics frame in a for loop

(works best if it has no drag)

and use raycasts along that trajectory to check for collision

[craggy grove]

Thanks! I'll try to give that a spin.

[craggy grove]

Hey sorry. Quick clarification - you saying just look several frames ahead in a fixed update method? So something like:

Velocity*gravity*time.fixedDeltaTime*numberofframesahead

[timid dove]

I'm saying keep track of the position and velocity as you iteratively simulate each future physics frame in a for loop

For as many frames as you're willing to look ahead

[craggy grove]

Ahhhhhh okay. So increment in a for loop time.fixedDeltaTime by something like 1

Ah, nvm. time.fixedDeltaTime is THE frame physics interval set in the project. Okay, got it.

[gleaming gorge]

I'm having this weird bug,
my ragdoll always flies up whenever it gets activated, but only when the timeScale is less than 1, when the timeScale is 1 it acts normally (or at least it seems to act normally), what could be the problem here?

[timid dove]

timescale shouldn't affect physics at all really, other than speeding up or slowing down how fast it is simulated

are you perhaps doing physics things in Update?

[gleaming gorge]

I'm sure I'm not. I do use add force after the ragdoll when the ragdoll activated, but even when I remove the AddForce, it keep flying up (only when timeScale is < 1)

[arctic marsh]

You got additional colliders that collide with ragdolls?

[gleaming gorge]

Just the floor, but it's outside below the ragdoll when it's activated

Wait, it seems that it flies up when ragdoll activated after certain animation

[arctic marsh]

Does your character collider get disabled when ragdoll is active?

[craggy grove]

Hey guys, I really appreciate the help that I've found here so far today. So I used @timid dove 's suggestion to calculate a projected position based on the velocity of my car object - and I THINK it's working. The deal is, now I want to turn the car an additional amount to what it is currently turning to follow the spline walker (yellow arrow). What I've been doing to get it to turn towards the spline walker is - take the InverseTransformPoint of the walker, and then divide the x value of that position by the magnitude to get the amount the car should steer (the value is a clamp between -1 and 1, with the first turning the wheels completely left and the latter turning them completely right). While that logic does work, I want to figured out the difference between the projected position, and the ideal position as indicated by the red marker here, and add that to the steering value. I would think that subtracting the ideal marker's position from the projected one's (light blue) would do the trick, using an InverseTransformVector function relative to the vehicle. However, I can't say this is working as expected. Plus, I ONLY want to do this if the angle is excessively wide. Would anyone be willing to give their two cents here on what I'm figuring out? Sorry if I'm overthinking things here.

[gleaming gorge]

Ah there it is, it seems that I added a sphere collider at runtime to the root, I'm not sure what was that for
~~After I disabled the sphere it works fine ~~
Thanks

Nope, I think the problem still remains

[gleaming gorge]

To understand the problem better, here are the comparison between with and without slowmo
Without slowmo

And with slowmo

[desert wave]

try adding a force

that opposes the ragdoll's force

[gleaming gorge]

I could simply reset the rigidbodies velocity to 0, but I need to know when to reset it. But it would be better to know what causing it to fly off so I can fix it.

[timid dove]

maybe put OnCollisionEnter on a script and print out what you're colliding with.

Maybe it's some errant collision causing it

[gleaming gorge]

I ended up by setting Rigidbody.maxDepenetrationVelocity to 0. It seems that the rigidbodies inside the ragdoll are colliding with each other, and timeScale seems to magnify the 'separation' velocity.
I tried multiplying the maxDepenetrationVelocity by timescale but it still flies up..
Thanks for the help

[timid dove]

The physics joints will have a setting that determines whether the connected bodies can collide with each other

maybe that would be helpful?

[gleaming gorge]

Do you mean the Enable Collision flag? Yep, I've tried both checked and unchecked, and it still fly away.
Setting Rigidbody.maxDepenetrationVelocity to 0 works with a trade of that the collider 'might' sink a little into the ground, but I dont think it will be noticable (if it happens at all)

[pliant basin]

Anyone know why my rigidbody 2d cylinder likes to stick onto walls?

[wide nebula]

Because of friction

[pliant basin]

And how do i remove it?

[wide nebula]

You can make slippery materials by creating a Physics Material asset, changing the friction to 0, and applying that asset to the collider on your wall.

[pliant basin]

I cant put it into the box colliders materia

[wide nebula]

Sure you can

Make sure you're using 3D for 3D, and 2D for 2D.

[pliant basin]

Ok

[bold seal]

Can I get cloth to work with DOTS physics

[twin storm]

Hi everyone! I have an issue with colliders intersecting. I've checked everything including the contact offset. I am attaching a screenshot of what is happening. Thanks in advance.

The game is for the Ludum Dare game jam.

[twin storm]

@stuck bay Nope, their not triggers.

[midnight glade]

Anyone got any pointers for my 2 solutions for implementing whenever a "loot location" has been found? I'm currently using a circle 2d collider that extends outside the screen resolution as what I call my "View", which will scan the surroundings for loot. (it follows the player)

1. Use a very simple gameobject with a collider and some LootData (position, loottype etc) on it so it is detected with collision by the view, and the prefab for the loot can be pooled to the location

2. Let the Update() function look for the position of the LootData in a list of all the spawn locations and check if they're inside the view. However, since this will happen with each player, and going through all the LootData on the map I thought that I could divide the map into different chunks that the player searches for the positions in the current chunk instead.

Not sure which of these methods are the most efficient, since I am unsure of the performance different between using Physics2d to detect collision VS searching the positions in a list in a chunked area each frame
Any tips and tricks are appreciated

[timid dove]

Physics will be more efficient

Unity's physics engines use a quite efficient algorithm to divide the space of the world such that only a small area of it is being tested for collisions by your collider at a time.

in effect you are getting that "chunking" behavior for free

[midnight glade]

Ah sweet, I'll do that then, thanks!

[tiny osprey]

Is there any easy way to make meshes deformable through physics interactions? I want to something akin to making a cube of gelatin that deforms to a certain extent when something pushes into it

[lapis plaza]

not with stock physics

you need softbodies for that

well, one can still fake the effect at some extent but that's another topic

either way, not going to be easy

[tiny osprey]

Do you know of any good unity assets for softbody physics that can be used with skinned meshes? Seems like there are not many choices, especially if you limit your search to recent stuff:

https://assetstore.unity.com/packages/tools/physics/obi-softbody-130029?aid=1011l34eQ&utm_campaign=unity_affiliate&utm_medium=affiliate&utm_source=partnerize-linkmaker

https://assetstore.unity.com/packages/tools/utilities/uflex-59843

https://assetstore.unity.com/packages/tools/animation/vertexmotion-23930

[torpid prism]

that second one is limited in what platforms you can target :

- NVidia GPU with at least CUDA 3.0 compute capability
- Windows 64 bit (Win 32bit experimental, Android and Linux support planned) 

[weary moon]

does anyone know why a charactercontroller isnt actually moving?

im using the Move() function and when i do CharacterController.velocity it shows that it indeed does have a velocity

but its not actually moving

[weary moon]

EDIT: the reason was because the char controller was on a child object

[obtuse marsh]

Can someone help me make my formulas physics and stuff better in Unity?

DM me if yes

[hollow echo]

Just ask your questions. #854851968446365696 describes how to ask a good question

[obtuse marsh]

My camera is shaking around and my car goes weird....

Idk anything more than that

[earnest rampart]

Hi guys i need help About vehicle physics in unity i am new in this server where i should ask?

[obtuse marsh]

Me too

When I get home from school I can show u, how I did it

[obtuse marsh]

What your question is?

[earnest rampart]

I want to learn how can i make vehicle controllers in unity i am struggling from weeks to get a good Tutorial or course that can teach but i cannot find anything even close to that i am looking for

I have some decent understanding of programming but i cannot code it myself because i have never worked on something like vehicle physics before

[obtuse marsh]

I can show u how I did it.... When I get out of school

[earnest rampart]

Thanks i will msg u in persony

Peesonal*

[carmine wedge]

Hey! I'm trying to get the count of particles from a particle system within a specific collider... Any points on how to do this? ParticleSystem.ParticleCount only shows the total amount in a scene

[carmine wedge]

Just found this: https://docs.unity3d.com/Manual/PartSysTriggersModule.html

[marble blade]

Hello folks, having a issue with the simplest chain of ConfigurableJoints deforming in a strange manner. Any idea?

[timid dove]

Solver iterations makes it sound like you're using IK. Are you using IK, or are you using physics joints?

[marble blade]

It's only basic configurable joints, capsule colliders and rigid bodies, nothing else

[marble blade]

And by solver iterations, I mean the physic engine iteration count in the project settings

[haughty sparrow]

Is this the right channel to ask about marching cubes?

[weary moon]

probably not lol

maybe #archived-code-general or #archived-code-advanced

[weary moon]

does anyone have a solution for a character controller not being grounded when walking down a slope?

[timid dove]

Are you doing something like calling Move multiple times per frame?

[weary moon]

nope :\

i even tried to give it a downwards motion while its grounded

[digital mesa]

Any reason why a Physics.Raycast() will not a ProBuilder object if the object's transform has a rotation applied? I'm rotating the object around the Y axis, and raycasts aren't hitting it for some reason. (Specifically this seems only to be a problem when the object's Y-rotation is 90 . . . between 0 to 89 degrees the Raycast hits) . . . one more quick update . . . it seems to only happen at Y rotation values of "90" and "270"

[digital mesa]

. . . probably related to the Mesh collider on the object. I replaced it with a box collider and it works as expected now. So much still to learn.

[timid dove]

could be something wrong with the geometry of your mesh

[gleaming gorge]

most likely because the colliders overlap one each other

[hollow topaz]

Hello, I am having problems with addforce and hinges. When I apply a force (not torque) to a rigidbody object that also has a hinge it rotates child the hinge in a wacky way.

Currently I am applying a force to the knee and to the toes to get them to try and follow the IK (the green debug boxes). when I apply the force to the knee the limb below the knee moves more than it should.

This is with just the force added to the knee

[lapis plaza]

@tiny ospreyobi is probably best out of those options... also if you want flex, nvidia has free integration for it too but it's kinda abandoned

in addition bullet physics can also do softbodies

https://assetstore.unity.com/packages/tools/physics/bullet-physics-for-unity-62991

oh, nvidia took all their content out of asset store

well, their free flex integration is gone then

but yeah it was very limited for platform side