Unity 3d Simple Mecanim Character Script

using UnityEngine;
using System.Collections;

public class Character : MonoBehaviour {

    public float moveSpeed;
    public float turnSpeed;

    Animator animator;
    bool onGround;

    // Use this for initialization
    void Start () {

        animator = GetComponentInChildren<Animator>();

    }

    // Update is called once per frame
    void FixedUpdate () {

        bool walk = Input.GetKey(KeyCode.LeftShift);

        float v = Input.GetAxis("Vertical");
        float h = Input.GetAxis("Horizontal");
        float x = Input.GetAxis("Mouse X");

        v *= (walk ? 0.5f : 1);

        Vector3 moveDirection = v * transform.forward;
        moveDirection += h * transform.right;

        transform.Rotate( 0, x * turnSpeed, 0 );

        Vector3 moveVelocity = moveDirection * moveSpeed;
        moveVelocity.y = rigidbody.velocity.y;

        rigidbody.angularVelocity = Vector3.zero;

        animator.SetFloat("Forward", v, 0.1f, Time.deltaTime );

        animator.applyRootMotion = onGround;


        onGround = false;
    }


    void OnCollisionStay( Collision c )
    {
        foreach ( ContactPoint p in c.contacts )
        {
            Vector3 localP = transform.InverseTransformPoint( p.point );


            if (localP.magnitude < (collider as CapsuleCollider).radius)
            {
                onGround = true;
            }
        }
    }



}