Unity实现物体运动时画出轨迹

本文为大家分享了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编程教程。

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