How to make a custom wheel collider

This is something i'm trying to get to grips with although at the moment I have no real reference on how to go about it.
I pretty much need the standard unity wheel collider however instead of the usual raycast replaced by a sphere cast in its place.
This will enable full surface collision with the wheel instead of the normal issues facing standard wheel colliders not working for wheelies or colliding properly with the environment.
Question is do I have to re write an entire new wheel collider system or is it possible to modify the existing system making use of the Physics.SphereCast function ?

 

Ok so i've been looking at the wheel collider source from Nic Tolentino :
http://www.unifycommunity.com/wiki/index.php?title=WheelColliderSource
http://forum.unity3d.com/threads/64494-Wheel-Collider-Source-Project

I'm looking at the code and I find where the raycast elements are and how the function.

Also here is a good explanation of whats wrong with the current unity wheel collider from Petey :
http://forum.unity3d.com/threads/90765-Trouble-with-WheelCollider-What-options-have-I-got.

NewLife's UnityCar has I believe implemented sphere casting to solve the problem so this is the route i'm going down as it makes the most sense at the moment.

 

anybody interested in making motorbikes or 2 wheeled vehicles in general would benefit from this work, please show your interest at least !

 

Help !

 

Hey,
This looks very interesting, I am curious and In need of a Wheel collider myself, If you could share more info about this it would be really great.
I'm new to Unity and would love to know how to make a wheel collider from scratch as well, since the stock one seems very limiting.
Thank you.
Attacker

 

Hi Attacker
Are you looking into bike wheel colliders in particular or just in general ?

 

Just general, I am actually setting up, or trying to, set up an ATV setup, with the front A-Arms and Swingarm at the back, stock wheel colliders just dont seem to cut it. Would be interesting to know what you have found out so far.

 

Well you'll need to be able wheelie which is where the standard wheel collider falls down for anything greater that a small power wheelie.
I've found you can use sphere colliders and joints but its hard to get proper friction like what the wheel collider does very well. People have had decent succes with sphere colliders and also with making custom wheel colliders but any real detailed information is very hard to come by. I've been documenting my experiences here - http://www.youtube.com/playlist?list=PLA9BBCE7167D56D5E&feature=plcp
I'm getting closer all the time, i've got some good contacts now but waiting to hear back about some better solutions. I'll post anything I find out and you can search my posts to see what i've found out so far (its all I talk about).
Many people aren't prepared to share their learning thought and it's not really something i've encountered before. I can see if somebody has invested money in a solution and is worried that the competition will get one over on them but its not how i think.
Anyhows watch this space I suppose and let me know if you uncover anything of interest, Unity is an awesome tool and its more than up to the job with a little fettling :O)

 

I now this is an old thread but was a solution ever worked out?

 

this wheel controller business is top secret stuff