Mathf.LerpAngle

Description

Same as Lerp but makes sure the values interpolate correctly when they wrap around 360 degrees.

The parameter t is clamped to the range [0, 1]. Variables a and b are assumed to be in degrees.

// Fades from minimum to maximum in one second

var minAngle = 0.0;
var maxAngle = 90.0;

function Update () {
        var angle : float = Mathf.LerpAngle(minAngle, maxAngle, Time.time);
        transform.eulerAngles = Vector3(0, angle, 0);
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public float minAngle = 0.0F;
    public float maxAngle = 90.0F;
    void Update() {
        float angle = Mathf.LerpAngle(minAngle, maxAngle, Time.time);
        transform.eulerAngles = new Vector3(0, angle, 0);
    }
}

See Also: Lerp.