[Unity C#] First Person Controller (E03: Fixing Slope Bouncing and Jittering)

[@fishbox385]

This comment is like 3 years later but thank goodness i found this channel, you're amazing dude.

[@troy9217]

This is the series of videos I've always needed! Thanks so much Matthew!

[@scoobynicker]

Thank you! Been I've been putting off fixing this exact issue in my game for months. I wish I would have found you earlier.

[@user-og6hl6lv7p]

Instead you could align a seperate gameobject to the collision surface normal and then use then use that gameobject as a directional reference for your character movement. So if you're on a slope the direction reference gameobject will rotate to match the surface normal, then you move your character while referencing the aligned gameobject, so it would look something like this: fowardMovement = directionReference.forward * vertInput; rightMovement = directionReference.right * horizInput; This way you don't have to constantly apply a ludicrous amount of force to the character saving a bit of overhead.

[@rodolf5941]

THANK YOU!!! This problem gave me brain damage. I tired everything, I mean, everything. Including increasing the gravity. But I never thought about increasing the gravity ONLY when you're on stairs or similar objects. Thank you man, even 2 years later, you're still extremly helpful

[@crazecrazie]

PSA, if you remove 'if (hit.normal != Vector3.up)', it will fix the jittering on stairs too (with the jump bool keeping the whole thing from breaking after removing that code). Adjusting the slope limit while not jumping will still give you some play room with terrain slopes, i recommend serializing this value.

[@DoomVisuals]

Or instead, have smooth stairs, add an invisible ramp on the stairs, it's smoother.

[@NathanTheCraziest]

Thank you so much for the proper explanation in a way i could understand, many other tutorials were too hard to understand but yours was very well explained, you deserve more subs

[@gr8m8n8]

I cant believe this worked for me! THANK YOU I looked everywhere and no one actually has a solution as effective as yours!

[@Xyz-q9f]

Incredible tutorial, worked 1000x better than any other I worked through

[@dynamicvoltage9765]

If you're already shooting a ray down, you might as well just set the player to the ground by measuring the distance to the floor. By adding extra gravity you run the risk of changing the speed at which the player moves.

[@simpleguyissimple]

your channel is so underrated. greetings from the Philippines ! you're the best man.

[@nostalgia7211]

Thanks, buddy! Thanks to you, I managed to solve the problem of sliding for surfing.

[@PhantomWolf93]

I had this problem for a long time and your video has been of great help, both to understand the problem and to solve it. Thanks so much :)

[@javac9158]

Better yet, you can "rotate" your move input to follow the curvature of the terrain. Simply find the normal of the ground and do ``` Quaternion rotation = Quaternion.FromToRotation(transform.up, groundNormal); move = rotation) * velocity; ``` and then use the move variable to control the player. This way you don't have to add an additional force when moving on slopes

[@Mr.Epsilion]

good solution :) thanks Lane

[@creasu124]

This is a very nice solution I think this is a very nice way of doing it

[@melowfx]

Hello! I really don't understand how to implement this system into my player controller, could you help me please? I'm struggling with problem so long ( how can I share pastebin, my comment gets deleted)

[@SonictheHedgehogInRealLife]

Like this? Quaternion rotation = Quaternion.FromToRotation(transform.up, hit.normal); moveDirection = rotation * (Vector3.ClampMagnitude(forwardMovement + rightMovement, 1.0f) * movementSpeed);

[@SonictheHedgehogInRealLife]

it didnt work

[@tapoutluke]

exactly what i was looking for. Thank you!!!

[@OxisTech]

this tutorial is a good easy fix unless you need to jump while on the slope

[@dagmarski4133]

You could code it so it behaves normal when jump is pressed

[@null987]

Does the normal return a vector perpendicular to the surface? Very good tutorial, easy to understand and concise! Keep up the good content!

[@AcaciaDeveloper]

Yes, that is correct. The normal vector points away (perpendicular) from the surface that a ray hits. Glad to hear you enjoyed!

[@Rosstail]

Thank you, some tutorials explained this for 2D, and the documentation gave another name for the 3D one ^^. After some Vector cross it is really possible to make a character slide on a high pitch ^^

[@SonictheHedgehogInRealLife]

I'm trying to make the character move on ramps loops walls ceilings any angled slope I have the player rotating by getting the surface normal from a raycast. I can move on flat ground but the player stops when trying to run up the ramps and onto walls

[@forcepower7116]

Please do Crouching next Love this Series so far

[@AcaciaDeveloper]

Glad to hear it. Crouching and sprinting are planned for the next two episodes.

[@WeegeepieYT]

yay :D

[@scotttrexler9947]

Saves me from having to ask. Can't wait for these videos... and thank you for the ones you've already done!

[@mdthevideogame]

Acacia Developer hello Matthew

[@zenrepublic97]

Saved my life, way too good of a tutorial

[@iDerp69]

Incredibly useful video, wow. Thank you!

[@RetroAnt3]

Thank you so much. This ruined my game and you helped me fix it. You deserve much much more Views and Subs

[@chikaychhann5628]

Keep it on, I always watch your videos

[@AthosSampaio]

Thanks for the tutorial. Clear and very useful!

[@unhommequicourt]

well i m still bouncing. I just can t jump from slopes anymore with this code

[@headrushgaming2614]

wouldn't this make jumping on a slope impossible if your'e using rb.AddForce or animation controllers and a capsule collider

[@bekirkagankaraahmetoglu]

It looks like we can use it for climbing on a vertical wall am I right?

[@RichardGardnerUK]

Why not just apply the force in the direction of the input and slope? It seems like changing gravity is just going to open up a can of worms in the long run. I found the reason for the skipping was because you are trying to apply a directly horizontal force when you are not on a completely flat surface. The same can be said when going up slopes, without the force applied in a relative direction you will find yourself slowing down as you essentially run into the ground.

[@SonictheHedgehogInRealLife]

howwww

[@virtuagames4957]

Great Tutorial, Thanks a lot, it helped me right now

[@samhsmith]

My solution for this is to rotate the move force so that it is perpendicular to the surface normal

[@justinc2633]

parallel?

[@SonictheHedgehogInRealLife]

Howwww

[@johni3080]

Amazing tutorial, but one fix, I think you want to add the slopeForceRayLength to charController.height / 2 and not multiply in Physics.Raycast if statement, line 58

[@IT-vy7kx]

Thank you! Get this guy out there!

[@kovacsbence5521]

For some reason, moving up platforms makes the code think you are actually not moving? Yeah okay, seems like the problem was with some Animation script. Thank you very much for your help nonetheless!

[@CAESAR_IS_GOD_mohammadisaloser]

This works until I perform a jump and then it goes back to bouncing? heres my jump code its different than yours if (controller.isGrounded) { moveDirection.y = 0f; if (input.GetButtonDown("Jump")) { isJumping = true; moveDirection.y = jumpForce; audioSource.PlayOneShot(Jump, 0.5f); } } is it just a placement issue possibly ? do I have to have it in a particular order?

[@CAESAR_IS_GOD_mohammadisaloser]

forget it figured it out had to add an else { isJumping = false; } line after my jump code.

[@mrworld8494]

sooo good i really needed this!!

[@94call]

Thank you so much!! You saved me a lot of time

[@SDFTDusername]

can you please teach us that if we are on the slope the camera will face to the slope direction

[@maevixie7041]

When my character is trying to go up a slope, it gets heavily slown down. Going down is fine. I'm using a rigidbody instead of character controller but I think I've managed to edit the code shown in the vid to be suitable for rbs. Any idea what might cause this to happen?

[@pandarzzz]

Thank you for sharing this informative video!

[@yester8946]

Great video but there's a problem: if I set the slope force to a high number to remove the small bounces, I can't jump when going up until I stop which then would process the jump mechanic. NOTE: I use Brackeys FPS movement tutorial

[@LowResDev]

This particular method doesnt seem to allow for mid air movement. How could I implement this?

[@user-og6hl6lv7p]

Have you tried increasing movement forces while the character isn't grounded?

[@NeZ3RR]

Hi i have a problem with if ((vertical != 0 || horizontal != 0) && onSlope) it shows error Operator '&&' cannot be applied to operands of type 'bool' and 'method group'

[@NeZ3RR]

oops my bad the && onSlope should have ()

[@Berniebud]

im having the issue where my character is constantly sliding down even the slightest slope

[@jsj0520]

i of course was working on my own project and didnt have the same code as you but when i went to go test if i have the slope force at 0 my character moves down normal, but if i have it at any number above 0 he starts to bounce down again. idk whats going on but im not complaining XD.

[@5_Fallen-3f]

Thank you so much. Amazing video.

[@AevenIridescent]

What i did when dealing with this issue was projecting the horizontal movement into the normal plane of the collider im hitting, simply done with Vector3.Project, as long as a very small raycast hits, so im not floating midair

[@SonictheHedgehogInRealLife]

yooooo i cant get it to work ive tried doing the same thing

[@AevenIridescent]

@@SonictheHedgehogInRealLife make a downwards raycast bellow your character, get the normal out of the hit, then use Vector3.ProjectOnPlane using the direction you wanna go and the normal you got.

[@SonictheHedgehogInRealLife]

@@AevenIridescent I did do this but for some reason it's only working on flat planes. I have a ramp that's smooth like a sonic game and when the rigidbody goes down the ramp it jitters.

[@AevenIridescent]

@@SonictheHedgehogInRealLife you might be messing up which vectors you're using, try using gizmo.draw to debug the vectors. But if you're making a sonic like game, then the problem could be another one, if the ramp is too steep the raycast could be failing to hit

[@SonictheHedgehogInRealLife]

@@AevenIridescent could be a possibility My ray cast seems to be working it gets the surface Normal of the ramp successfully. I'm casting the raycast down from the player. The player can rotate successful with the surface Normal. I'm not sure what could be going wrong. Can I see your code if you have it?

[@animadoarts5123]

Will it also climb the hill.. without resistive force

[@louislemur]

OMFG EXACTLY WHAT IM LOOKING FOR

[@AgressivePigeon]

You are a godsend.

[@m.h.kstudio1740]

this tutorial is a good easy fix unless you need to jump while on the slope how to jump in slope ???\

[@노성엽-y2k]

Can you even climb trees?

[@beandevelopment9503]

where did u go I love these vids there ultra helpfull

[@aberrantcurse8551]

how do you detect which way the slope is facing?

[@aberrantcurse8551]

nvm i got it

[@xdplai3190]

Can anybody help me i have tried this but its not working. I found out the mistake by printing hit.normal which is always giving (0, 0, 0) even when i am on slope

[@dylanfoster186]

your raycast isnt hiting a collider. Make sure the raycast length is long enough to reach the ground.

[@connorc1742]

How do i prevent the slope force from weighing down my jump height when walking???

[@connorc1742]

And this won’t make my jump height less when walking?

[@CornRecords972]

@@connorc1742 Lemme explain it's because the additional gravity for slopes is only applied when the person is on a slope and not jumping so as soon as the player jumps the extra gravity is removed

[@connorc1742]

@@CornRecords972 Wait can you message your full script? im kind of confused on where to put this

[@CornRecords972]

@@connorc1742 Rewatch the tutorial and look for where he put the code then compare what he types to mine. If I show you everything you wont learn.

[@chaos4living676]

Doesn't work for me, it say that there is no definition for height and that is not accessible extension method 'height' accepting a first argument of type 'PlayerController' I'v read your code and don't understand how you can do but .height seem to be shitted out of nowhere as far I am concerned. Tumb down

[@unhommequicourt]

i think you just misspelled height. i don t have compilation error

[@iR3dy]

will this work for third person

[@durr4n371]

it says for me: Invalid expression term '&&' any help?

[@TheGordonFryman]

Hey! Are you still getting this error? If so, can you show me your script?

[@durr4n371]

@@TheGordonFryman hi, I was getting the error but I've since changed interests in game design and have uninstalled unity

[@justinc2633]

@@durr4n371 hahaha

[@dcat1832]

how to jump?

[@alextang5268]

please make a vid on how to get the player to be able to move while in mid air

[@pixelfiltergames2310]

alex tang why that is not even a thing that needs any code to not make him move in mid air is harder

[@fd8373]

A year ago this work for me but now it do´nt . Any ideas ?

[@unhommequicourt]

i don t know i tried this today and the code does nothing i m still bouncing.

[@u.s7072]

great series, looking foward the sprint / crouching

[@pixelfiltergames2310]

† † † U.S come on for sprinting increase speed and change animation crouch decrease speed change animation

[@322ss]

Thanks for the videos! Interesting approach for grounding player in slopes, but would this work for capsule collider with physics movement as the floor could be slippery? Also, couldn't you just add the downward force whenever not jumping? Another idea - if you really want to glue the player to the ground, have you tried alternatively to just move the character downward based on raycast hit?

[@AcaciaDeveloper]

Hi, good questions. "but would this work for capsule collider with physics movement as the floor could be slippery?" I'm unsure about how rigidbody physics would react exactly since I've built this tutorial for a character controller (that doesn't interact with Unity's physics system). If you're adding custom physics materials to your ramps and trying to pin rigidbody objects down onto it, then that could be something good for you to test out to see what does and doesn't work. "Also, couldn't you just add the downward force whenever not jumping?" Yes, you can do that, but it could introduce unwanted side-effects depending on how the controller is being used. I'd prefer to implement some extra computation to make sure that I'm only applying additional downward force when it's needed. It's also the case that if the player simply walks off a ledge, they will fall to the ground very fast since the space bar was never pressed to trigger the jump. You'll probably have to do an additional check to the isGrounded boolean on your character controller to solve this issue, although from my experimentation, this caused some other problems. "if you really want to glue the player to the ground, have you tried alternatively to just move the character downward based on raycast hit?" I've tried setting the player controller's position directly to n number of units higher on the y axis than the hit point on the floor. This caused jittering as the player walked onto and off the ramp, and the movement on the ramp seemed slightly more sharp and sudden than it should be.

[@joshuamason2227]

what happens when you jump on a slope while walking though?

[@lilcatfriend4575]

the whole thing poops out IVE BEEN TRYING TO FIX IT BUT CAN'T THINK OF HOW TO DO IT

[@joshuamason2227]

@@lilcatfriend4575 I think to fix it you need to abandon the whole add gravity thing and try some new methods. Just a suggestion, I ain't no expert

[@illusen1020]

I just threw the "if (verticalInput != 0 || horizontalInput != 0 && OnSlope())...." into another "if (!isJumping)" because if I'm jumping I don't care if there's a slope beneath me or not

[@damgaronfire]

5:00 the heck are those signes

[@ksew9269]

OR operator

[@WhereisYunoGasai]

damgar Video Jeux signs*

[@technoo4891]

learn c# first before trying to learn unity, fucks sake..

[@damgaronfire]

@@technoo4891 dude that was 1 yr ago y you booly me

[@goncharov000]

awesome stuff

[@Dudi4PoLFr]

Could you do a episode about Crouching, Sprinting/Walking?

[@AcaciaDeveloper]

Crouching and sprinting are planned for the next two episodes.

[@Dudi4PoLFr]

@@AcaciaDeveloper Great news! Thank you for your replay.

[@i3m1r]

please make running, incline and creep

[@mdthevideogame]

Hello Matthew

[@shalluxi7184]

Thank you!

[@joegrizzly999]

Or you can us a invisible collider for a smooth slope game do that for a easy fix

[@yekclateuputhomas3452]

very cool ty

[@yassineaguedid1929]

i love acacia trees :D

[@giovannicunha2529]

Nice

[@AmgedAlfakih]

this didn't work with me

[@alicewithalex]

Very cool

[@danlmult]

Thanks!

[@leandroleveron9933]

Thank you sir.