make FPS controller rotate at the same y-axis as the camera when input is held?

I have a FPS controller set up using the mouse orbit script. my problem is i want my character controller to have to same y-axis (rotation) as the main camera when you hold the axis vertical or horizontal. I tried this guys script but it maid me character fly in the air.
http://forum.unity3d.com/threads/dead-space-style-camera-help.171284/

If you've ever played Dead Space then I just want a character that rotates like that.

 

Doesn't mouse look do that?

 

I want the camera to rotate around the player when he's standing still but have the character face away from the camera when he moves.

 

Kinda makes no sense to do this in an FPS.

 

You can detect when the player moves by storing the last vector position and the current vector position and getting the magnitude (i think itsVector3.Distance() in unity) then if its > 0.1 or what ever rotate the player if its nto then dont rotate the player.

Code (JavaScript):

1. var target : Transform;
2. var distance = 10.0;
3. var LastPos = new Vector3(0,0,0);
4. var debug = 0.0;
5. var xSpeed = 250.0;
6. var ySpeed = 120.0;
7.  
8. var yMinLimit = -20;
9. var yMaxLimit = 80;
10.  
11. private var x = 0.0;
12. private var y = 0.0;
13.  
14. @script AddComponentMenu("Camera-Control/Mouse Orbit")
15.  
16. function Start () {
17.     var angles = transform.eulerAngles;
18.     x = angles.y;
19.     y = angles.x;
20.  
21.     // Make the rigid body not change rotation
22.        if (GetComponent.<Rigidbody>())
23.         GetComponent.<Rigidbody>().freezeRotation = true;
24. }
25.  
26. function LateUpdate () {
27.    var Magnitude = Vector3.Distance(target.position, LastPos);
28.    debug = Magnitude;
29.     if(Magnitude > 0.05)
30.     {
31.          target.localEulerAngles = new Vector3(target.localEulerAngles.x, Camera.main.transform.localEulerAngles.y, target.localEulerAngles.z);
32.     }
33.     LastPos = target.position;
34.     if (target) {
35.         x += Input.GetAxis("Mouse X") * xSpeed * 0.02;
36.         y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;
37.        
38.          y = ClampAngle(y, yMinLimit, yMaxLimit);
39.                
40.         var rotation = Quaternion.Euler(y, x, 0);
41.         var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
42.        
43.         transform.rotation = rotation;
44.         transform.position = position;
45.     }
46. }
47.  
48. static function ClampAngle (angle : float, min : float, max : float) {
49.     if (angle < -360)
50.         angle += 360;
51.     if (angle > 360)
52.         angle -= 360;
53.     return Mathf.Clamp (angle, min, max);
54. }

Thats just a proof of concept using mouseorbit it should work you will probably need to smooth it out make sure you use a main camera thats not a child of the player.

 

I'm having trouble figuring out how to set it up. Can you tell me step by step how

 

this one was just set up on a FPS character controller as a example method:

Add a fps character to the scene delete its camera
Add a MainCamera
Attach script to camera
Attach target to script

You should be able to put this into a camera scritp you make but you need to make it smoother.

Code (JavaScript):

1.    var Magnitude = Vector3.Distance(target.position, LastPos);
2.    debug = Magnitude;
3.     if(Magnitude > 0.05)
4.     {
5.          target.localEulerAngles = new Vector3(target.localEulerAngles.x, Camera.main.transform.localEulerAngles.y, target.localEulerAngles.z);
6.     }
7.     LastPos = target.position;

 

Thanks!!! I've been trying for months to figure this out. But one question, where would I put the input 'Aim' so it would do the same thing as the horizontal and vertical axis. The 'Aim' input is a joystick button.