1 using UnityEngine; 2 using System.Collections; 3 using System.Collections.Generic; 4 using System.Linq; 5  6 public class PathDefinition : MonoBehaviour 7 { 8     public Transform[] LinePoint; 9     List<string> test = new List<string>();10 11     public IEnumerator<Transform> GetPathEnumeratror() {12         if (LinePoint == null || LinePoint.Length < 1)13             yield break;14 15         int direction = 1;16         int index = 0;17 18         while (true) {19             yield return LinePoint[index];20 21             if (LinePoint.Length == 1) continue;22 23             if (index <= 0) direction = 1;24             else if (index >= (LinePoint.Length - 1)) direction = -1;25 26             index = index + direction;27         }28     }29 30     void OnDrawGizmos()31     {32         if (LinePoint == null && LinePoint.Length < 2) return;33 34         /// filter null35         var Points = LinePoint.Where(t => t != null).ToList();36 37         if (Points.Count < 2) return;38 39         for (int i = 1; i < LinePoint.Length; i++)40         {41             Vector3 start = LinePoint[i - 1].position;42             Vector3 end = LinePoint[i].position;43             Gizmos.DrawLine(start, end);44         }45 46     }47 }

using UnityEngine;using System.Collections;using System.Collections.Generic;public class FollowPath : MonoBehaviour {    public enum FollowType    {        MoveToward,        Lerp    }    public FollowType Type = FollowType.MoveToward;    public PathDefinition Path;    public float Speed = 1;    public float MaxDistanceToGoal = .1f;    IEnumerator<Transform> _currentPoint;    public void Start() {        if (Path == null) {            return;        }        _currentPoint = Path.GetPathEnumeratror();                _currentPoint.MoveNext();        //set position at start point        if (_currentPoint.Current == null) return;        transform.position = _currentPoint.Current.position;    }    void Update() {        if (_currentPoint == null || _currentPoint.Current == null)  return;        if(Type == FollowType.MoveToward)            transform.position = Vector3.MoveTowards(transform.position,_currentPoint.Current.position,Speed*Time.deltaTime);        else if(Type == FollowType.Lerp)            transform.position = Vector3.Lerp(transform.position, _currentPoint.Current.position, Speed * Time.deltaTime);        var distanceSquared = (transform.position - _currentPoint.Current.position).sqrMagnitude;        if (distanceSquared < MaxDistanceToGoal * MaxDistanceToGoal) {            _currentPoint.MoveNext();        }    }    }