Hello, all. I am a unity 5 user and I can not figure out how to correct my problem. I have a blend tree called blendSpeed that I am trying to control through animator by getting the component only when I call velocity. My character freaks out and I can not figure it out I have tried multiple ways for the past two days passining various vector3 values and floats setting  velocity and calling magnitude in the fixed update. I believe my problem is my use of transform.Translate to move my characters horizontal and vertical. I Think I am not understanding the mathematics involved so if anyone can point me in the right direction to correct my problem, it would be greatly appreciative.

public class PlayerInput : MonoBehaviour
{
    public float movementSpeed = 10;
    public float turningSpeed = 60;

    private Rigidbody playerRigidBody;
    private Animator anim;

    private float horizontal;
    private float vertical;
    private Vector3 currentVelocity;

    private Vector3 previousPosition;
    private Vector3 currentPosition;
    private Vector3 moveVelocity;
    private Vector3 moveInput;

    void Start()
    {
        playerRigidBody = GetComponent<Rigidbody>();
        anim = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update ()
    {
        float mouseX = Input.GetAxis("Mouse X") * turningSpeed * Time.deltaTime;
        transform.Rotate(0, mouseX, 0);

        vertical = Input.GetAxis("Vertical") * movementSpeed * Time.deltaTime;
        transform.Translate(0f, 0f, vertical);

        horizontal = Input.GetAxis("Horizontal") * movementSpeed * Time.deltaTime;
        transform.Translate(horizontal, 0f, 0f);


        Animating();

    }

    void FixedUpdate()
    {
        if (vertical > 0 || horizontal > 0)
        {
        playerRigidBody.velocity = (transform.position);
        }
    }

    void Animating()
    {
        anim.SetFloat("blendSpeed", playerRigidBody.velocity.magnitude);
    }

}