Unity實現(xiàn)物體運動時畫出軌跡

更新時間：2021年09月12日 17:18:20 作者：天人合一peng

這篇文章主要為大家詳細介紹了Unity實現(xiàn)物體運動時畫出軌跡，文中示例代碼介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們可以參考一下

本文實例為大家分享了Unity實現(xiàn)物體運動時畫出軌跡的具體代碼，供大家參考，具體內容如下

1、新建空物體，上賦LineRenderer

2、新建空物體，把軌跡畫出來，設計和腳本。

3、LineMark的腳本是

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);//克隆一個帶有LineRender的物體   
  line = clone.GetComponent<LineRenderer>();//獲得該物體上的LineRender組件  
  //  //line.SetColors(Color.blue, Color.red);//設置顏色  
  //  //line.SetWidth(0.2f, 0.1f);//設置寬度  
  i = 0;
 }
 
 // Update is called once per frame  
 void Update () {  
 
  RunNext = run.transform.position;
 
  if (RunStart != RunNext) {
   i++;
   line.SetVertexCount(i);//設置頂點數(shù) 
   line.SetPosition(i-1, run.transform.position);
 
  }
 
  RunStart = RunNext;
 
 
 
//  if (Input.GetMouseButtonDown(0))  
//  {  
//   clone = (GameObject)Instantiate(obs, obs.transform.position, transform.rotation);//克隆一個帶有LineRender的物體   
//   line = clone.GetComponent<LineRenderer>();//獲得該物體上的LineRender組件  
//   line.SetColors(Color.blue, Color.red);//設置顏色  
//   line.SetWidth(0.2f, 0.1f);//設置寬度  
//   i = 0;  
//   print ("GetMouseButtonDown");
//  }  
//  if (Input.GetMouseButton(0))  
//  {  
//   i++;  
//   line.SetVertexCount(i);//設置頂點數(shù)  
//   line.SetPosition(i - 1, Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 15)));//設置頂點位置   
//   print ("GetMouseButton");
//
//  }  

 
 }  
}

4、運動小球和腳本

Run.cs

using UnityEngine;
using System.Collections;
 
public class Run : MonoBehaviour
{
 public GameObject target;   //要到達的目標
 public float speed = 10;    //速度
 private float distanceToTarget;   //兩者之間的距離
 private bool move = true;    
 
 void Start()
 {
  //計算兩者之間的距離
  distanceToTarget = Vector3.Distance(this.transform.position, target.transform.position);  
  StartCoroutine(StartShoot());
 }
 
 IEnumerator StartShoot()
 {
 
  while (move)
  {
   Vector3 targetPos = target.transform.position;
 
   //讓始終它朝著目標
   this.transform.LookAt(targetPos);
 
   //計算弧線中的夾角
   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、目標小球和運動設置的腳本

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、運行結果