A method that returns a direction from 2 Euler Angles.

DirectionFromEulerAngle

// Y - Vertical
//XZ - Horizontal
public static Vector3 DirFromAngle (float xa, float ya)
{
    float x = Mathf.Cos(xa * Mathf.Deg2Rad) * Mathf.Cos(ya * Mathf.Deg2Rad);
    float y = Mathf.Sin(xa * Mathf.Deg2Rad);
    float z = Mathf.Cos(xa * Mathf.Deg2Rad) * Mathf.Sin(ya * Mathf.Deg2Rad);

    return new Vector3(x, y, z).normalized;
}