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Question by LucaH97 · Mar 26, 2017 at 05:19 PM · physicscarwheelcollidertroubleshootingbike

Problem with Wheel Colliders: Jitter and unstable!

Hello everyone,

I am currently working on a VR Biking game and need some help with the wheel colliders. alt text Since simulating bike physics is no easy task I opted for just making a car with 4 invisible wheels and using my bike model. I had it working but decided to try to make a more realistic feeling bike, which failed. When I tried to get back to the working "Car style" some issues started to appear:

  • Extreme Jitter, horrible for VR!

  • Weird behaviour when turning

I tried everything in my power to fix this, including:

  • Disabling VR Mode

  • Disabling any Camera or Movement scripts attached

  • Lowering / Raising the gravity in the Physics Settings

  • Modifying the Wheel Collider values

  • Changing the Center of Mass to any position (towards the front / back, move it up / down)

  • Entirely deleting Unity with all the settings files and reinstalling

NOTHING Worked! So I decided to create an entirely new Project and simply follow Unity's standard Wheel Collider tutorial. I recreated the given instuctions step for step exactly like shown, but when I hit play and drive around the random jittering still occurs, even on a completely flat plane! In my confusion and rage I made this video simply showing all the settings and the weird effect: https://youtu.be/ujn5TJ3Mv4g

What is going on here, does anybody know? I'm sure it's just that I forgot about one super simple thing or something stupid like always, just need a nudge in the right direction :)

bikeunity.jpg (390.7 kB)
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Answer by bhavinbhai2707 · May 11, 2017 at 02:06 PM

Its Probably because you didnt add any collider to the body of Bike or the car, which really makes the wheelCollider unstable

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