Help with Object Rotation

[twemb]

I am trying to set an objects rotation to a specific angle with this line:

Wheel1.transform.rotation = Quaternion.Euler(Random.Range (0, 5) * 60, 0, 0);

But for some reasons the y and z angles are sometimes 180 instead of 0. What am I doing wrong?

[Jordi-Bonastre]

Hi, this answer is related to this question: Problem with localEulerAngles (180 degrees error?) - Questions & Answers - Unity Discussions

The conversion quaternion->euler isn’t reliable: there are several different xyz combinations corresponding to any quaternion, and many times the combination returned isn’t the one we expect - specially when more than one axis is != zero.
Fortunately, the conversion euler->quaternion is reliable, thus we can use the following approach: get the initial Euler angles and rotate them mathematically, assigning the result to the actual Euler angles in Update (or other periodic function):

Vector3 euler;

void Start(){ euler = wheel.localEulerAngles; // save initial rotation }

void Update(){ // “rotate” wheel angle around X: euler.x = (euler.x + collider.rpm 6Time.deltaTime) % 360; // set wheel Y angle: euler.y = collider.steerAngle; // update actual wheel localEulerAngles: wheel.localEulerAngles = euler; } NOTE: This works fine because Unity applies the Euler rotations in the order Z-X-Y, thus the angle about X will be set before the angle about Y. This trick would fail if the wheel rotated about Y and steered about X, for instance.