Question Root motion - turning character to the cameras look direction

Hello everybody, I have decided to try out root motion! I have an issue though that i have googled around for HOURS trying to find.

I can control my character using

Code (CSharp):

1.  
2. vertical = Input.GetAxis("Vertical");
3. horizontal = Input.GetAxis("Horizontal");
4.  

and then feed it to the animator

Code (CSharp):

1.  
2. animator.SetFloat("Horizontal", horizontal);
3. animator.SetFloat("Vertical", vertical);
4.  

but that does move the character totally unrelated to the camera look position. I want the character to turn and move towards where the camera is looking and i cannot figure out how i can get a float value between 1 and -1 that i can feed the animator.

Any help deeply appreciated!