Getting animations to play relative to player's direction?

New code:

 var speed : float = 1;
 var gravity : float = 20;
 var lookSpeed = 4.0;
 
 function Start () {
 
     var abdomenMix : Transform = transform.Find("Armature/Pelvis_C/Abdomen");
     
     animation["HGun_Fire"].wrapMode = WrapMode.Once;
     animation["HGun_Fire"].layer = 2;
     animation["HGun_Fire"].AddMixingTransform(abdomenMix);
     
 }
 
 function Update(){
 
     var playerPlane = new Plane(Vector3.up, transform.position);
     var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
     var hitdist = 0.0;
 
     if (playerPlane.Raycast (ray, hitdist)) {
         var targetPoint = ray.GetPoint(hitdist);
         var targetRotation = Quaternion.LookRotation(targetPoint - transform.position);
         transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, lookSpeed * Time.deltaTime);
     }
 
     var velx: Vector3 = Camera.main.transform.forward * Input.GetAxis("Vertical");
       var velz: Vector3 = Camera.main.transform.right * Input.GetAxis("Horizontal");
       var vely: Vector3 = transform.up * -gravity;
   
       velx.y = 0;
       velz.y = 0;
       
       var flatVel = velx + velz;
       
       var localVel = transform.TransformDirection(flatVel);
 
       var controller = GetComponent(CharacterController);
       
       controller.Move((flatVel + vely) * speed * Time.deltaTime);
       
       if (localVel.x >= 0.25) {
         animation.CrossFade("Walk");
           }
       
     else if (localVel.x <= -0.25) {
         animation.CrossFade("Backpedal");
         }
     
     else if (localVel.z >= 0.25) {
         animation.CrossFade("StrafeR");
         }
         
     else if (localVel.z <= -0.25) {
         animation.CrossFade("StrafeL");
           }
                     
       else {
           animation.CrossFade("Idle");
           }
 }

////////////////////////

Hi all! I am trying to get a movement script to play nice with animations. The game uses an ortho-isometric camera and so the movement is based on Camera.main.transform, which works perfectly, but I'm having trouble getting animations to play relative to player direction.

Basically, what I need to accomplish is this - when the player is actually walking in his forward direction, play Walk. When he is walking in his left direction, play StrafeL. And so on, etc. I have tried comparing the if statement to various movement-related things, but the obvious choices don't seem to work. Comparing it against Input.GetAxis("foo") likewise doesn't work, because those axes are relative to the camera, not the player.

EDIT: Forgot to mention, the player's look direction is always based on the position of the mouse cursor relative to a plane.

Here's the script as it currently is:

 var speed : float = 1;
 var gravity : float = 20;
 var lookSpeed = 4.0;
 
 function Start (){
 
     var abdomenMix : Transform = transform.Find("Armature/Pelvis_C/Abdomen");
     
     animation["HGun_Fire"].wrapMode = WrapMode.Once;
     animation["HGun_Fire"].layer = 2;
     animation["HGun_Fire"].AddMixingTransform(abdomenMix);
 }
 
 function Update(){
 
     var playerPlane = new Plane(Vector3.up, transform.position);
     var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
     var hitdist = 0.0;
 
     if (playerPlane.Raycast (ray, hitdist)) {
         var targetPoint = ray.GetPoint(hitdist);
  
         var targetRotation = Quaternion.LookRotation(targetPoint - transform.position);
 
         transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, lookSpeed * Time.deltaTime);
     }
 
     var velx: Vector3 = Camera.main.transform.forward * Input.GetAxis("Vertical");
       var velz: Vector3 = Camera.main.transform.right * Input.GetAxis("Horizontal");
       var vely: Vector3 = transform.up * -gravity;
   
       velx.y = 0;
       velz.y = 0;
 
       var controller = GetComponent(CharacterController);
       
       if (!Input.GetAxis("Vertical") && !Input.GetAxis("Horizontal")) {
           animation.CrossFade("Idle");
           }
   
    
       if (velx == true) {
         animation["Walk"].speed = 0.65;
           animation.CrossFade("Walk");
           }
   
       if (-velx == true) {
           animation["Backpedal"].speed = 0.5;
           animation.CrossFade("Backpedal");
           }
   
       if (vely == true) {
           animation["StrafeR"].speed = 0.65;
           animation.CrossFade("StrafeR");
           }
   
       if (-vely == true) {
           animation["StrafeL"].speed = -0.5;
           animation.CrossFade("StrafeL");
           }
       
       controller.Move(vely * gravity * Time.deltaTime);
 
       controller.Move(velx * speed * Time.deltaTime);
       controller.Move(velz * speed * Time.deltaTime);
 }

If anyone knows what I'm missing here, I would greatly appreciate the help :D