I Tested This Weird Wheel Glitch to Solve My Problem

[@FailRaceFan]

I may have a theory on why it was interfering with wheels in certain positions but not all of them: Similarly to the flap wing, the seat consists of multiple pieces that can glitch out. When driving forward, some parts of it lag behind a bit, hit the wheel and cause the bounce. The foward part of the wheel moves downward, hits them and causes them to move down too. This results in an equal and opposite reaction to the wheel moving up. That's why you made frontflips when driving forward. I also thought about, whether it could be the player interfereing with the wheel. This seat is, as you noted, only three tiles long. This gives barely any buffer space around the player which could exaggerate the effect compared to other seats. It is rather unlikely that you will read this, but I want to thank anybody that did make it to here. Stay safe out there!

[@jd2kpst199]

That makes sense

[@Purpleone1]

Genius spottet

[@spacewalk3046]

Bodies on the same creation dont have friction between eachother (wheels wont make anything rotate thats on the same creation). the devs would rather push more dlcs than fix all the bugs in the game tho.

[@Heyant]

There could also be an unintented hitbox between the wheels and seat

[@keesvdb]

I think it could have to do with it trying to climb a part of the seat. On poorly made maps with little lips it does the same things

[@jinxthevampire349]

Another bug ive noticed is when standing still in a vehicle it slowly twitches to the right this is mainly visible in your supersonic/race hunting videos

[@Droomy]

Yep, veryyyyyy annoying

[@emreayse2008]

yeah AAAAAAAUGH

[@RhysWilliams-mk9vo]

Same

[@26E4MYPANTS]

Since the devs love scrap man so much I'm hoping they see this video and update the car physics in addition to damage physics, hopefully to make the whole game a lot crispier in terms of random flipping and vehicular seizures

[@L1amba]

Easier said than done lol. It would be great though

[@BLKBRD-SR71]

I was going to say the same thing. I'm sure the devs will be watching. An update may come soon.

[@ThePhonax]

Yea, they’ll change it, that’s for sure. Though, ever since 2022, flashbulb hasn’t even solved any problems with their game, they’ve just replaced them. Wheels clipping through the ground? Now they’re deflated. Creations too fragile? Now they get launched every time they tap another creation. Most likely, they’ll make it so that wheels end up being extremely frictionless

[@26E4MYPANTS]

@@ThePhonax agree able

[@fredrickbambino]

@@L1amba Doesn't matter if it's easier said than done, they'll have to fix it eventually.

[@Follower-OYT]

I'm so glad you covered this! I stumbled upon this glitch a while back and had no idea what was happening for a bit. You can replicate this fairly easily with the recommended simple car at the start of the stranded in space campaign. Just replace the two back wheels with a single centered back wheel and after the second bulldog gets installed the back end of the vehicle simply flies off the ground. My best guess as to what's happening is that the game's mechanics that have something to do with wheel grip on different surfaces isn't reacting to the seat correctly. But I can't say for sure. Just my best guess.

[@Midnight-1810]

This explains why your cars always "perform better in reverse" whenever you used to do MM on trail makers

[@hypermind15]

Wasn't that in scrap mechanic?

[@6Saturn9]

@@hypermind15 nah, it just happened again in F1 evolution (video) with three different build actually! Yzuei, kAN and ScrapMan had the same issue on the first round.

[@warden6908]

@@hypermind15 Yeah that used to always happen in scrap mechanic. Not nearly as much in trial makers

[@Kui-fi6lw]

I think this is called the trike glitch. Basically when your wheels are with your seat in the direction you are moving in, your back wheels kick upwards. This can even be used to fly if you have something that counterrotates your vehicle, like a gyro stabiliser.

[@iceberg_4o487]

I attempted to build a super fast 10 power core with only engines and it launched my car 20 feet into the air multiple times during my run, it’s so annoying

[@fx-modding]

That debugging will help the trailmaker devs to find the root cause

[@DuOpig]

They wont fix it. I still have boats that turn in circles for no reason

[@TimEriksson-w2n]

@@DuOpig might be a skill issue

[@dannyphellpguerrero4534]

@@DuOpig might be weight distribution or air drag

[@ShaneWare-z9g]

@@DuOpig can you show me the build so i can help you on your issue

[@_ikasaki_]

Scrapman has became official trailmaker debugger team developer LoL

[@royalphrog]

I love how i dont even have trailmakers yet im still watching this

[@me_when_asd]

Not having [thing] but watching [thing] content is my favourite thing to do

[@JulianPanebianco-zp1li]

Same

[@creeper0750]

Same

[@royalphrog]

@@me_when_asd well i cant relate to this glitch at all but you have a point

[@raccun9670]

Should definitely give it a go, really satisfying making a build that actually does what you designed it to do and does it well!

[@Loop_Kat]

I've done a decent amount of testing to try and understand this glitch myself because it's happened on a bunch of my builds, but y'know what I just realized? _It's the player model colliding with the wheels_ When your character enters a seat, they're visibly stationary (aside from the various animations), _but_ the invisible collision box actually _moves_ outside of the seat boundaries depending on the direction and speed at which you're moving. You can visually represent this by using a go-kart seat and placing a distance sensor to aim across the upper section of the seat (ie: front of the seat aiming toward the back). By default, the sensor won't actually detect the seat, but it _will_ detect your character when you enter the seat (this can be used as a automatic engine ignition trick). If you keep the sensor at a range of 1.0 or lower though, you'll notice that it actually starts to cut out once you get above a certain speed because your character's collision box shifts further and further backwards as you speed up This explains why you couldn't replicate the glitch when the seat was so far in front of the back wheels (5 blocks ahead of it), the player collision box simply wasn't trailing back far enough to touch the back wheel in those specific instances. Though, I think it would still occur if you were going much faster

[@Rade1664]

It's probably just a wheel collider interfering with the seat collider. It's just a thing with the unity game engine. I saw the same thing happen with the wheels in KSP and TerraTech, and probably some other games games that use unity. You could probably make a kraken drive by using a piston to push a plate against the wheel, it should cause the creation to move without any other inputs.

[@TlalocTemporal]

Isn't that just the UFO drive, but with a plate & piston instead of a hoverpad?

[@manpreet_singh_dhaliwal]

I might be stupid but maybe the air controls are the cause of the issue?

[@HalfWolf2]

I had the same idea, because I think the vehicle rotates around the seat with air controls, so turning one way would have an issue

[@xCHUNKx]

This was a very educational video, I have a couple of cars with this issue so I'll have to go back and edit them. Thanks, Scrapman! It's great to see you having fun towards the end of the video, nothing better than tuning your car and getting nice smooth drifts around a track. This is probably a niche request but I'd love to see you start from scratch again now armed with everything you know and create the ultimate driftcar. Maybe you could test out some of your watchers builds to see how they work too? Maybe even join AlterEghost and me for a drift session?

[@ClaytonBrownMusicOfficial]

Got Trailmakers last night because of these videos. It’s harder than what I was expecting to make something really effective, but I’m glad to report that my Scrapman binges have served me pretty well when it comes to getting good spots on the leaderboard.

[@Nerca_P1]

I used to call this the Erbana glitch. It always interfered with 200kg battlebots and so we named it after a battlebot. You can solve this by adding a 1 stud block space on either side of the wheel with only one block connecting it i believe. If it doesn't work you should try putting a 1x4 or some elongated block with one connection point to the wheel. I hope you guys found this helpful! :D(you have two points connected on the wheel, that's why)

[@MrLarsgren]

i think the logic blocks behind the front wheels might have same type of hitbox like the seat making the drift car freak out nomatter the seat placement

[@xavierxbox45]

What time

[@MrLarsgren]

@@xavierxbox45 you see the logic blocks in the beginning when he lift the drift car. they are what the narrow wheels hit nomatter the seat placement

[@SteinGauslaaStrindhaug]

8:44 Commenting before watching the whole video (ADHD, sorry): I wonder if the problem is the "seat controls" interacting badly with the gyro stabilisers (or control gyros too). A car will normally roll slightly when you turn and pitch when you accelerate and having a gyro trying to force it to not roll or pitch will probably both in real life and in this physics engine result in unexpected gyro effects. (In real life pushing on a gyro will give weird twisting forces on a different axis; and in a game engine the stabiliser "gyro" is probably just applying a turning force towards in whatever direction needs the smallest force to restore the up direction after all the other forces is calculated; and probably whenever the turning force from movement exceeds some value (probably when the roll force from turning is strong enough to make the car eventually flip without the gyro) it probably requires less force to flip rather than to oppose the force hence why you flip over (and sometimes shoot up in the air) so much.

[@spacemanspiff8635]

Was going to make this same comment. Seat controls combined with gyro stabilizer fighting the roll seems likely

[@ewancoppens3193]

Devs, pull up your notebooks. This scientific research is very valuable for bug - fixing.

[@TGazza]

I think what the problem you're facing in your drift car is seat controls causing the car to pitch down as you are pressing the w key. As you move the driver seat closer to the front wheels, the leverage is weaker due to more weight at the back. But as you move it away from them, it's easier for the seat to pitch down due to leverage. Not 100% sure, but it does look like what's happening in your video as you experiment with different ideas!. Just a thought! Keep up the awesome work!

[@retsujou]

My brain goes back to when the Cadillac engineers were trying to solve the rear wheel-hop issue with the CTS, and after years of trying to redesign it and figure it out and failing to make any difference to the issue, they just told us to call it a 'feature'.

[@Flare7639]

Scrapman is slowly becoming the most knowledgeable player ever by fixing these bugs with his vehicles and the supersonic vids

[@nilfe5528]

You should've disabled seat air control

[@mmaster-sk]

Based on my testing it has nothing to do directly with position of seat but instead center of mass in combination with gyro stabilizer. The issue does not happen when you don't have left-right roll gyro stabilizer.

[@haydenratcliffe1138]

Posted several comments on this vid but just wanted to say thank you for solving this Scrapman, you've saved me alot of time troubleshooting, I never would have thought to move the seat out of everything haha I would definitely enjoy more troubleshooting/problem solving vids

[@Checkered-Vaporwave]

You should see if you can amplify this effect to turn it into a sort of mechanical bull minigame! (Solo or multiplayer, whichever way you think you can make it work)

[@fdfpi47]

In the first demolition derby you did after the damage update, Kan's tiny car got launched super far at one point. It would be interesting to see if that was just from a really light vehicle hitting a heavy vehicle or if something else happened there. I would also like to see a video testing damage physics. A few times you mentioned not being sure if a shield helps protect from collisions. I'm curious to see if weight affects the damage imparted.

[@wisewizard9552]

Really satisfying to see ScrapMan happy that he fixed his car

[@ImprovLover]

For some reason when you have your seat off center, the back wheel of the side that your seat is on glitches into the floor. If you center your seat you won’t have this problem. The glitch tends to happen at higher speeds

[@magixx2618]

Also u should have increased the angles on the steering hinge to carry out drifts with more steeper angles

[@RamadaArtist]

It's crazy to me that the very first thing you messed with are the pair of seats, and for neither seat did you consider turning air controls off. As long as those are on you're gonna get weird phantom vectors that are going to screw up the rest of your engineering.

[@Mazapine]

I actually ran into this problem with the big rig I built the other day. It could do Doughnuts when I turned left but trying them to the right caused it to flip over. Even though it was perfectly balanced.

[@patricmiller114]

I'm glad you have a good relationship with the devs

[@jankitharun.d5305]

I would like to see scrapman make a space motorcycle in trailmakers

[@quester_jester7287]

We love when scrap man does the bug testing for the devs

[@haydenratcliffe1138]

You guys should do the Speed challenge again, but with drift cars, set up the speed sensors to monitor sideways velocity so if somebody drives straight too long they explode

[@cuber9320]

Your joy gives us joy ScrapMan!

[@MikeGameOver]

Use the piston “hack” so it will pull the seat into place once you spawn it in.

[@D32L14N]

The devs are gonna love this video, I would at least

[@struberrypietoo]

I have a hunch that if you widen the wheel base, one block per wheel. You might fix the random bounces

[@Aymon825]

at this point scrapman is pretty much a dev

[@Flare7639]

Nah he better than the devs

[@hi_7691]

Another thing that could be messing with your drift car is the speed. The drift car that you tried reverse engineering you could only go around 55 mph to drift, where as your drift car is going high 60s mid 70s. Your texting buggy was even in the 70s. This could explain why the transfer between switching from a left drift to a right drift and vise versa results in the little stutter. But I noticed that only happens when you’re going over 55 or 56 mph

[@frehdom9783]

@26:15 reminded me of the "Have you ever had a dream like this?" kid xD

[@ATLAStheprotogen1]

The glitch that you have discovered here is called trike glitch. It is whenever the wheels hit box touches the player, resulting in it to drive onto the player, which can result in build being able to fly with only tires engines and a seat

[@riccardopetrina4212]

You could have made it Mr. Bean's drift car and left it up there. The improvement was stunning. It's always the little things that you think don't matter. You think aerodynamic arrows don't matter too much? Or the orientation of the wedge doesn't matter? Or the height of the powered tailfin? Or in this case the seat? They all matter.

[@ViniSocramSaint]

Great car. And great fix! I think the whole machine tipping is intended, as if a fast spinning wheel catch a piece of chassis, the spinning energy gets transferred to the chassis as kinetic energy, making it go up, and the rest of the wheels make it spin while on air. And it is more prone to happen if the patch of the wheel that scrapes "hits a wall" instead of "slipping under a slab", so that is why the direction the wheel spin is important. The problem is the collision in the car seat is bigger than expected, I think. The game engine may use a hull to calculate collisions, and the car seat may have some rogue piece of geometry that counts when calculating the hull or the geometry itself makes the hull get elongated.

[@Gabriele_G]

A problem with drifting may be because you put all wheel driving on the other car

[@MikeGameOver]

Maybe the guy that built the really nice drift used the piston glitch on the wheels to prevent the weird things from happening.

[@dannyphellpguerrero4534]

i have a theory on why the wheels glitch out you know how on scrap's vids yzuei's build peices lag behind a bit and go back that must be what the physics client must be seeing thus adding random friction and bounces as if theres a build peice there and sometimes even reversed (the whole build lags behind the seat) similar to what happened to scrap in the dethrone vid in wich scrap kept having problems with his supension and wheels due to the random flying off glitch (where the steering hinge glitches out when hitting other blocks) and random complete stop (due to the wheels hitting the car) also this reminds me of the people playground thermo vision mode (the thermo node and thermo hit hitbox lags behind and sometimes to the front at high speeds) though my second theory (aka plan b of a theory) is the wheel rubber physics (how the wheels have physics when popped or pushed against an object) when wheels in trailmakers pop (or just stand alone) they simulate loose rubber physics and connected rubber physics (similar to how real life rubber works) MEANING that it might be the rubber wheel's hitbox hitting the pilot seat though though my final theory is just weight distribution though to work around it just dont use slim wheels for drifting as you might just need to slow down the back wheels a bit as friction on the front is higher then the back gets flinged to the sides OR just elevate the driver's seat up so it wont interfere with the wheels level wise though all of these are just theories and have no proof of concept YET so it might change BUT HEY THATS JUST A THEORY A GAME THEORY THANKS FOR READING also vid sugestion: drift race please? (～o￣3￣)～

[@subsonic7777]

This is why I always have a hard time building motorcycles... at some point the rear tire always goes up

[@lunar0008]

To not over steer make a gyrostabliser facing forward and make it so that when you stop turning it will straighten out better

[@BLANK33222]

the devs are probably sweating balls after they saw this video lol

[@kaiser1794]

It looks like your issue is all about Center of Rotation which is changing based on your center of mass as well as the direction of converted torque. When you move forward, your vehicle is most likely being pushed down when your seat is farther forward due to increased weight at the front making your front wheels more stable. The smaller tires have lower friction values than the racing tires making it easier for them to lift off the ground. Trailmakers probably also doesn't have a completely perfect differential system for wheels when you take all of these different co-efficients into account. The stuttering may be caused by the wheel speed for either side not being perfectly isolated when you go into turns. That or its the above issue of low friction and center of mass affecting your rotation and your torque generated when you move forward.

[@Vuskenicht]

I know you preferred the old design, but the one with shifted forward seats looks more like a real car imo. The engine compartment usually only takes up 1/5-1/4 of the overall vehicle length. The rest is dedicated to passenger space or storage.

[@MikeGameOver]

It’s like the game thinks those tires should be climbing up the back of the seat.

[@funkynibblet]

Honestly, it could be a gyro placement proximity thing as well

[@historictick8179]

This vid is an extremely accurate representation of engineering, having and idea making the idea then testing tf out of the problems until you find the core issue and solve it

[@KhalidAlharbi67]

I think the problem is in the tires because the tires are for bikes and when you drive a bike in real life and you turn left or right, the bike tilts in that direction. so when you turn to the right the game tries to tilt the vehicle to the right and lift the left wheels of the ground

[@watsgoinonhere1]

The bike tires aren't programmed to tilt you left and right.

[@infebris]

the tires arent programmed to do that, that would be seat controls which wouldnt be strong enough to do that with his vehicle anyway

[@ledocteur7701]

If you must have the seat close to the back wheels, then putting them on piston also works, probably because then they aren't on the same weld group.

[@kepstin]

The wheels on the drift car are each on separate pistons, so this doesn't seem to help unfortunately.

[@dagr._09]

Im so glad this was adressed recently all of my drift builds have felt like the wheels have been colliding with some sort of invisible barrier and always making my car hop or bounce up into the air 🙃

[@antonschmitz2255]

The devs should focus on fixing the physics engine instead of just adding new DLCs. If the pysics were more consistent I would probably play it much more often

[@tjavado]

the devs fix a lot of the glitches and bugs that are reported. this glitch (commonly known as the trike glitch) is something that they could fix, but because of what causes the glitch fixing it would almost certainly break a lot of already made creations

[@DuOpig]

Wonder if this is also a cause for several boats ive made turn in a large circle for zero reason. Weird part interaction. Yay unity. Im sure there are dozens of individual parts having issues with other individual parts, making a fix impossible.

[@alexsanderrevemark5136]

It might get bether with sharper angel steering. Drift cars hav a angel closer to 70° (don't now exactly) to be able to turn out of the drift.

[@ZacharyJohansen]

Trailmakers' devs incorporating a death wobble feature is crazy.

[@KrishenLad]

i think that your seat might have to be closer to the front of your vehicle due to game inefficiencies and bugs

[@rdtripler5604]

He found the bug, analyzed the bug, crushed the bug and mastered his drift car... Very inspirational..!

[@alecsmith4349]

I have noticed when I have tried to make three wheeled cars with one wheel in the back, putting any wheel directly behind the seat regardless of where the seat is immediately causes this effect. I’ve also tried to make one wheel cars with the seat in the front andthis happens as well.

[@demolition3612]

Loved the glitch solving, always a pain when you dont know where to begin when solving a problem, but always very rewarding once the problem gets solved, or at the very least the source discovered.

[@StrangeQuark97]

Good ol' trike glitch... Sadly I think that won't be patched, sadly, which is especially annoying with the driftbuilds featuring rather slim wheelbase.

[@chickenychickens07]

Tricycle glitch, the devs said they couldn’t fix it.

[@haydenratcliffe1138]

I had the same issue with my drift cars pre-motorhead DLC meaning I was using Gokart seats

[@SinnerD2010]

Bro I totally called this. Congrats on fixing the issue Scrap, sad that you had to go from a Mazda Miata to a Prius to do it though 🤣

[@infebris]

i dont think his car was based on either of those

[@JPJW001]

4:33 Mr. Bean’s car reference?

[@drive_6665]

Mr Bean car for the win! Armchair on the roof is the way xD

[@Jonnygriz]

This glitch makes it very hard to build motorcycles and 3 wheeled cars. Very annoying

[@Xtradonian_Smiley]

I dont think this is just thin wheels because in my motorcycle race build the bikes back end would rise so bad i had to have counterweights and a lot of spoilers to counteract this glitch and it still did this enough to affect 95% of my runs, btw i was using offroad and spiked wheels in the bike.

[@anatolian6269]

I dont watch all the video not sure if he found out but literally all the cause is when you attach a steering hinge on base build, the things you put on steering hinge clips thru the base building. But when you add another steering hinge or any functional block, (piston, large hinge, servo etc.) the things you put on second hinge will be granted a hitbox. So your car has pistons right before hinges. That makes wheels hit to fenders of your car. If you did make turning function with double steering hinges, (Like that example drift car which you tested in last video) wheels would turn in place, not moving forward to backward.

[@guuspot923]

Sounds like steering force may be applied as an invisible quasi- block ahead of the wheels and it's hitbox can interfere with the build and vice versa.

[@merc-hi2uo]

Man a drifting race with others on the new f1 circuit will definitely be fun

[@Shaderox]

Good testing different types of wheels and finding there seems to be a correlation between wheel width & the issue. But it was kind of missing the really big wheels that's higher if they work differently, also didn't try if different seats affect it or not either.

[@joshsee7]

We need to have the dev and scrapman collab again just for scientific purposes and mythbusting

[@ozzehh]

this is scrapmans "gateway drug" to trailmakers glitches

[@Adrian-3]

I think the seat parts are lagging and conflicting with the back wheels physics.

[@animalazx7239]

Video idea you should do a tag team evolution race where you swap who upgrades the vehicle every round

[@jd2kpst199]

Scrapman do a challenge where you make an anti air artillery and the and the one to survive the longest as a plane wins Got the idea from the flack cannon video you made think it would be cool if it was human controlled

[@markcobb7158]

I would have the issue on trikes, had to push rear wheel out more then 8 blocks on some builds to resolve it.

[@outer_spacedgames5048]

I feel like this glitch should be called "Car Hiccup"

[@TehSafst3r]

When I made my own drift car I forgot to turn off seat air controls and that was causing my car to flip only to the left because my seat was off center lol

[@Gomorragh]

on average drift cars are low and wide, your car seems more like turning a long thing car into a drift car, but thats more of a dragster like arrangement, but, the arrangment of seat and wheels for the car without the problems, the difference is where the wheels spawn, if you realise that the seats spawn in 3 or 4 blocks above the wheels but lower down into the range, this means its a bug caused on spawn more than actually due to build location

[@DesyncX]

It almost seems that the player character's hitbox is still there while the player is seated in certain seats? If the player or seat hitbox is computed separately from the vehicles hitbox that could explain why the farther away you are from the back wheels the less chance there is for them to overlap since the player/seat's hitbox may be "lagging" behind a bit and being too close to the wheel hitbox? Depending on the frame/tick when each is calculated (there are certain delays there) could explain the "randomness". Devs should know how the whole vehicle's hitbox is calculated (why this problem is not there between other blocks) so just make the seat work the same and disable the player's hitbox if seated (if not done so already). If you want the player to have a hitbox even though they are seated, make a new one that's attached to / part of the vehicle itself and not just attached to the player/seat...

[@DOomLuask]

You need to test the collision physics especially with shields

[@AbhinavSingh-cl3lj]

you weren't able to go sonic speed in canon only video because your vehicle keeps exploding due to some glitch in canon hope you will check that out

[@Sp0o0kii]

I think just adding hinges on the back wheels would fix it, hinges kinda prevent the wheels from colliding with the seat

[@scoobythebest57]

Hey scrapman, i love your videos, also i made something you could definetly make a few videos with in scrap mechanic. Its fully vannila and super stable. Its prty much a cannon for explosive canisters. Its very reliable and will always hit the same spot. Inspired by something i belive i saw in your vids. If youre intersted i could def show and explain it or something like that

[@wolf-no8zg]

i wish he would do a co-op nomad

[@ceberus213]

I think this might be the issue with some of your race vehicles too, some of them wanted to pop up with the one slim wheel they had

[@marxxisshalott2443]

I think we need a scrapman plays need for speed series

[@riverus9896]

This glitch plagues me when I make bikes.

[@dimoichi5841]

Maybe widen the car and keep the seat in the middle to avoid it's hit box issue. Just my two cents, hope it helps

[@lashi_0007]

It seems I was way off on my guess. This video saved me hours of frustration trying to make it work the way I suggested.

[@VoidGamingZero]

Air controls left the chat...