Unity 用Material画出一条指示路径

　　最近项目有需要画一条可以动的路径 路径的位置是服务器给的 就想起来用Material来实现。

　　大概原理就是：

　　　　1. 创建一个Plane；

　　　　2.根据提供的起点和终点坐标 把Plane放置在两点中间的位置

　　　　3.控制Material的offset 来让Material 的贴图呈现动的效果

　　　　4.根据两点间的距离 修改Material的Tiling 来调整间隔距离

　　　　5.根据两点间距 修改Plane的localScaler Z的大小 来调整路径显示的长度

 

下面代码

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

public class TestRoute : MonoBehaviour
{

    public Vector2 Interval = new Vector2(0, -0.02f);
    /// <summary>
    /// 旋转方向
    /// </summary>
    public Transform point;


    private Material material;
    private Vector2 offset;
    void Start()
    {
        material = this.GetComponent<MeshRenderer>().material;
        offset = Vector2.zero;

       // Test();
    }

    // Update is called once per frame
    void Update()
    {
        offset -= Interval;
        material.SetTextureOffset("_MainTex", offset);
    }

    /// <summary>
    ///  设置Route 位置 长度 朝向 旋转
    /// </summary>
    /// <param name="endPos"></param>
    /// <param name="exitPos"></param>
    public void SetRoute( Vector3 endPos, Vector3 exitPos )
    {
        if (material == null)
            material = this.GetComponent<MeshRenderer>().material;

        Debug.Log("Route    " + endPos + "    "+ exitPos);

        //GameObject obj = new GameObject("A");
        //obj.transform.position = endPos;

        //obj = new GameObject("B");
        //obj.transform.position = exitPos;

        //Vector3 middle = (endPos - exitPos) / 2;
        //transform.position = endPos - middle;



       transform.localScale += new Vector3(0, 0, Mathf.Abs( Vector3.Distance(endPos,exitPos) )/11f);
       
        material.SetTextureScale("_MainTex", new Vector2(1, Mathf.Abs(Vector3.Distance(endPos, exitPos))*1.5f));
        //Debug.Log((exitPos - endPos).normalized);
       // transform.rotation = Quaternion.LookRotation(transform.position, (endPos - exitPos).normalized);
       


        Vector3 pos = endPos + (exitPos - endPos).normalized * (Vector3.Distance(endPos, exitPos));
        transform.position = (exitPos+endPos)/2.0f + new Vector3(0, -1.5f, 0);

        point.position = endPos + new Vector3(0, transform.position.y, 0);
        transform.LookAt(point);
        //transform.eulerAngles = new Vector3(0, transform.eulerAngles.y+182 , 0);
    }


    /*
     * TEST  
     * 
     * 
     * 
    */


    public Transform A;
    public Transform B;
    
    public void Test()
    {
        SetRoute(A.position, B.position);
    }
     
}