Tracking Object Rotation?

I would use a different approach: have a float variable curAngle, modify it according to the controls and then set the player rotation to curAngle using eulerAngles. Since you must not set individual eulerAngles components, save its initial value in a variable euler, then modify only the desired axis. In the example below (attached to the player), the player turns around the Y axis:

var curAngle: float = 0.0; // current angle about Y var turnSpeed: float = 15.0; // degrees per second private var euler: Vector3; // save the initial euler angles

function Start(){ euler = transform.eulerAngles; // initialize the euler variable }

function Update(){ // modify the curAngle variable using the controls curAngle += Input.GetAxis("Horizontal") turnSpeed Time.deltaTime; // set the Y euler angle in modulo 360 euler.y = curAngle % 360; // update the player rotation transform.eulerAngles = euler; } You can always know the current angle reading curAngle.

EDITED: Ok, if you want to know the current angle about Y, you can just read transform.eulerAngles.y
This will work fine until the eulerAngles x and z are not far from zero: weird y angles may be returned at some points otherwise. The property eulerAngles is just transform.rotation in a 3-axes format; since 3-axes format is redundant (0,180,0 is the same rotation as 180,0,180) many different xyz angle combinations may be returned for the same rotation. Unity tries to return the most logical combination, but when the x, y and z are all non-zero, some weird values may be returned.
Case you have problems with eulerAngles.y, try the simple function below, which returns the current rotation angle around Y - the angle is "extracted" from the quaternion components:

function AngleAboutY(q: Quaternion): float { var ang = 2*Mathf.Rad2Deg*Mathf.Acos(q.w*Mathf.Sign(q.y)); if (ang > 180) ang -= 360; return ang; }

// read the current object rotation with something like this: angle = AngleAboutY(transform.rotation);

You can store the euler angles when the movement starts (ex: in your "jump" script), then compare with new angles when the player hits the ground. This hit-check can be an OnTriggerStart event, or simply waiting for its y-speed be equal to zero.