Unity实现物体运动时画出轨迹

 using System.Collections; using System.Collections.Generic; using UnityEngine; public class LineMark : MonoBehaviour { private GameObject clone; private LineRenderer line; private int i; public GameObject obs; public GameObject run; Vector3 RunStart; Vector3 RunNext; // Use this for initialization void Start () { RunStart = run.transform.position; clone = (GameObject)Instantiate(obs, run.transform.position, run.transform.rotation);//克隆一个带有LineRender的物体 line = clone.GetComponent();//获得该物体上的LineRender组件 //  //line.SetColors(Color.blue, Color.red);//设置颜色 //  //line.SetWidth(0.2f, 0.1f);//设置宽度 i = 0; } // Update is called once per frame void Update () { RunNext = run.transform.position; if (RunStart != RunNext) { i++; line.SetVertexCount(i);//设置顶点数 line.SetPosition(i-1, run.transform.position); } RunStart = RunNext; //  if (Input.GetMouseButtonDown(0)) //  { //   clone = (GameObject)Instantiate(obs, obs.transform.position, transform.rotation);//克隆一个带有LineRender的物体 //   line = clone.GetComponent();//获得该物体上的LineRender组件 //   line.SetColors(Color.blue, Color.red);//设置颜色 //   line.SetWidth(0.2f, 0.1f);//设置宽度 //   i = 0; //   print ("GetMouseButtonDown"); //  } //  if (Input.GetMouseButton(0)) //  { //   i++; //   line.SetVertexCount(i);//设置顶点数 //   line.SetPosition(i - 1, Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 15)));//设置顶点位置 //   print ("GetMouseButton"); // //  } } }

 using UnityEngine; using System.Collections; public class Run : MonoBehaviour { public GameObject target;   //要到达的目标 public float speed = 10;    //速度 private float distanceToTarget;   //两者之间的距离 private bool move = true; void Start() { //计算两者之间的距离 distanceToTarget = Vector3.Distance(this.transform.position, target.transform.position); StartCoroutine(StartShoot()); } IEnumerator StartShoot() { while (move) { Vector3 targetPos = target.transform.position; //让始终它朝着目标 this.transform.LookAt(targetPos); //计算弧线中的夹角 float angle = Mathf.Min(1, Vector3.Distance(this.transform.position, targetPos) / distanceToTarget) * 45; this.transform.rotation = this.transform.rotation * Quaternion.Euler(Mathf.Clamp(-angle, -42, 42), 0, 0); float currentDist = Vector3.Distance(this.transform.position, target.transform.position); if (currentDist <0.5f) move = true; this.transform.Translate(Vector3.forward * Mathf.Min(speed * Time.deltaTime, currentDist)); yield return null; } } }

 using System.Collections; using System.Collections.Generic; using UnityEngine; public class followme : MonoBehaviour { Rigidbody follew; // Use this for initialization void Start () { follew = GetComponent (); } // Update is called once per frame void Update () { transform.Translate (new Vector3(0.1f,0.1f,0.1f)); } }