Script

using UnityEngine;
using System;
using System.Collections;

public class UnityMover : MonoBehaviour


    {
    public float speed = 6.0F;
    public float jumpSpeed = 8.0F;
    public float gravity = 20.0F;
    public Rigidbody rb;

    public float groundCheckRadius;
    public Transform groundCheck;
    public LayerMask whatIsGround;



    private bool Grounded;

    private Vector3 moveDirection = Vector3.zero;
    void Update() {
        CharacterController controller = GetComponent<CharacterController>();
        if (controller.isGrounded || !Grounded)
        {
            moveDirection = new Vector3 (Input.GetAxis("Horizontal"), velocity.y, 0);
            moveDirection = transform.TransformDirection(moveDirection);
            moveDirection *= speed;

            }


        if (Input.GetKeyDown(KeyCode.Space) && Grounded)
        {
                moveDirection.y = jumpSpeed;

        }
        moveDirection.y -= gravity * Time.deltaTime;
        controller.Move(moveDirection * Time.deltaTime);
    }

    void FixedUpdate()
        {
            Grounded = Physics.OverlapSphere (groundCheck.position, groundCheckRadius, whatIsGround).Length > 0;



            /*
            if ((Mathf.Abs (input.x) > float.Epsilon || Mathf.Abs (input.y) > float.Epsilon) && (advancedSettings.airControl || m_IsGrounded)) {
                // always move along the camera forward as it is the direction that it being aimed at

                desiredMove = Vector3.ProjectOnPlane (desiredMove, m_GroundContactNormal).normalized;

                desiredMove.x = desiredMove.x * movementSettings.CurrentTargetSpeed;
                desiredMove.y = desiredMove.y * movementSettings.CurrentTargetSpeed;
                if (m_RigidBody.velocity.sqrMagnitude <
                   (movementSettings.CurrentTargetSpeed * movementSettings.CurrentTargetSpeed)) {
                    rb.AddForce (desiredMove * SlopeMultiplier (), ForceMode.Impulse);
                }*/
            }
        }