problem with rotation

Questions & Answers
1

I’m trying to rotate a tire on a vehicle. This is a parent object to other object containing the wheel so that I can rotate the wheels around in a circular motion then also be able to rotate the wheels side to side for turning. I can rotate the wheels just fine in the editor (and in the script for the circular rotation) but I can’t seem to make is rotate correctly side to side in the script.

Before shot:

22138-wheelstart.jpg
22138-wheelstart.jpg1180×498 121 KB

and after shot (again rotated using the editor - notice the z rotation):

22139-wheelturn.jpg
22139-wheelturn.jpg1256×453 108 KB

I’ve tried a number of different ways but I can’t get the script to rotate it properly.

if(Input.GetKey( KeyCode.R ) )
		{
			float step = 2f * Time.deltaTime;
			frontLeft.rotation = Quaternion.RotateTowards(frontLeft.rotation, new Quaternion(frontLeft.rotation.x,frontLeft.rotation.y ,frontLeft.rotation.z+.2f,1f) , step);
			frontRight.rotation = Quaternion.RotateTowards(transform.rotation, new Quaternion(transform.rotation.x,transform.rotation.y,transform.rotation.z+.2f,1f) , step);
		}

Thanks for any help anyone can offer.

2

If it were me, I’d use multiple game objects with parent/child relationships to solve this problem. The wheel would be parented to a pivot object (probably empty), and the pivot would be parented to the axle of the car. The wheel would rotate on it local ‘x’ to spin the wheel. The pivot would rotate on its local ‘y’ to turn the wheels. For turning the wheel, I’d likely use Transform.Rotate(), which by default uses local space. For turning, since I’d want to limit the angle, I’d keep an angle value and assign to Transform.localEulerAngles.