[Unity 2017] Racing Car VR

  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;

  public class move_craft : MonoBehaviour {

	  void Start () {	}
	
	  void Update () {
      float xrot_rate = 120 * Time.deltaTime;
      float zmoverate = 5 * Time.deltaTime;
      float dirx = Input.GetAxis("Horizontal");
      float dirz = Input.GetAxis("Vertical");
      
      this.transform.Translate(Vector3.forward * zmoverate * dirz);
      this.transform.Rotate(Vector3.up*dirx*xrot_rate); 
	  }

    void OnCollisionEnter(Collision other){
      print("hit with "+other.gameObject.name);
      Debug.Log("avoid "+ other.gameObject.tag);
      if (other.gameObject.tag == "obstacle")
        Destroy(other.gameObject);
    }

    void OnTriggerEnter(Collider other){
      print("Pass");
    }
  }

  using UnityEngine;

  namespace UnityStandardAssets.Utility{
	  
    public class SmoothFollow : MonoBehaviour{

  		[SerializeField]
  		private Transform target;

	  	[SerializeField]
		  private float distance = 10.0f;

	  	[SerializeField]
		  private float height = 5.0f;

  		[SerializeField]
	  	private float rotationDamping;

		  [SerializeField]
  		private float heightDamping;

	  	void Start() { }

		  void LateUpdate(){
			  if (!target)
				  return;

			  var wantedRotationAngle = target.eulerAngles.y;
			  var wantedHeight = target.position.y + height;
			  var currentRotationAngle = transform.eulerAngles.y;
			  var currentHeight = transform.position.y;

			  currentRotationAngle = Mathf.LerpAngle(currentRotationAngle, wantedRotationAngle, rotationDamping * Time.deltaTime);
			  currentHeight = Mathf.Lerp(currentHeight, wantedHeight, heightDamping * Time.deltaTime);

			  var currentRotation = Quaternion.Euler(0, currentRotationAngle, 0);

			  transform.position = target.position;
			  transform.position -= currentRotation * Vector3.forward * distance;

			  transform.position = new Vector3(transform.position.x ,currentHeight , transform.position.z);

			  transform.LookAt(target);
		  }
	  }
  }