Unity实现物体运动时画出轨迹

本文实例为大家分享了Unity实现物体运动时画出轨迹的具体代码，供大家参考，具体内容如下

1、新建空物体，上赋LineRenderer

2、新建空物体，把轨迹画出来，设计和脚本。

3、LineMark的脚本是

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<LineRenderer>();//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<LineRenderer>();//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");
//
//  }  

 }
}

4、运动小球和脚本

Run.cs

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;
  }
 }

}

5、目标小球和运动设置的脚本

follew.cs

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

public class followme : MonoBehaviour {

 Rigidbody follew;
 // Use this for initialization
 void Start () {
  follew = GetComponent<Rigidbody> ();
 }

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

  transform.Translate (new Vector3(0.1f,0.1f,0.1f));
 }
}

6、运行结果

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。