Left/Right Shimmy when tracking on a camera path

Unity Engine
1

Im having a bit of an issue, I have a game with multupe vehicles, only one of which is the Players.
My players vehicle, has to hand over to AI control after a period of non use… for an attract mode. I therefore kick in an AI sytem, which isn’t very AI, its just tracking to a camera path/spline and moving along the path. The other in-game vehicles use this tracking system and its all smooth and sweet.

But though my players vehicle under AI control, is finding the path, and tracking it…but I’m getting a lot of very severe left right shimmy on the y axis as it travels long. All normal user input and control is disabled when under AI control so there’s no (I think) conflict of control.

The same shimmy thing incidently happens to AI vehicles, if they are off the ground plane and falling to it. The shimmy stops instantly when they hit the ground and they continue on smoothly.

So it appears that even though I have a rigid body, and wheel colliders which I’m sitting on and am on the ground, when under AI “control” I appear to be off the ground…

anyone seen anything like this, any suggestions for fix, even a dirty one for now to get moving on this.

2

nope take that back I do still seem to have some kind of control over the vehicle, I can’t actually steer it, but I am able to slow it down to a stop, so even though I am not processing any of the input handling code, something is still active somewhere (I just can’t see any of my code doing it)

3

It turned out to be a a difference in height between my camera path and the tracking object, they needed to be the same…