LineRenderer的用法 射线检测的进一步用法

可以在同一个面板上有两种颜色的线

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

public class LineRenderText : MonoBehaviour
{

    LineRenderer Line;
    public Material[] m=new Material[2];
    public int num = 2;
    public int num1 = 2;
    public int CNum;
    bool b = false;
    int index = 1;
    float time = 0;
    LineRenderer line1;
    Vector3 pos;
    bool isChange = true;
    // Use this for initialization
    void Start()
    {
        Line = GetComponent<LineRenderer>();
        Line.material = m[0];
    }

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

        Line.SetPosition(0, Vector3.zero);
        Line.SetPosition(1, new Vector3(10, 10, 10));
        Line.SetWidth(0.1f, 1f);
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;        
        if (Physics.Raycast(ray, out hit))
        {                         
            if (Input.GetMouseButtonDown(0) && hit.collider.name == "Plane")
            {
                index++;
                if (index % 2 == 0)
                {
                    b = true;
                }
                else
                {
                    pos = hit.point;
                    b = false;                  
                }
            }
            if (b)
            {
                time += Time.deltaTime;
                if (time > 0.06f)
                {
                    if (isChange)
                    {
                        num++;
                        Line.SetVertexCount(num);
                        Line.SetPosition(num - 1, hit.point);
                    }
                    else
                    {
                        num1++;
                        line1.SetVertexCount(num1);
                        line1.SetPosition(num1 - 1, hit.point);
                    }
                   
                    time = 0;
                }
            }
            if (!b)
            {               
                    if (hit.collider.name == "Cube1"&&Input.GetMouseButtonDown(1))
                    {
                        GameObject go = new GameObject();
                        line1 = go.AddComponent<LineRenderer>();
                        line1.material = m[1];
                        print(hit.collider.name);
                        line1.SetPosition(0, pos);
                        line1.SetPosition(1, hit.point);
                        isChange = false;
                    }
                
            }


        }

        //Line.SetPositions();
    }
}

 

 

 

 

父子关系，找失活的儿子，transform.find();自

方向是自己的forword

 

点击的那个点：hit.point;

 

 

 它的缺点是只画方向

 

 定义层 

 

 

2.从cube发射射线 脚本挂cube，cube的z轴，，检测出来加入list，小怪走了就remove

 

 

2.1

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

public class RayText : MonoBehaviour {
    public LayerMask Layer;
    // Use this for initialization
    void Start () {
        
    }
    
    // Update is called once per frame
    void Update () {
        Ray ray = new Ray(transform.position,transform.forward);
        RaycastHit hit;
        if (Physics.Raycast(ray,out hit))
        {
            Debug.DrawLine(transform.position,transform.forward,Color.gray,100);
            if (hit.collider.name.Equals("Sphere"))
            {
                hit.collider.GetComponent<MeshRenderer>().material.color = Color.green;
            }
        }

        //Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        //RaycastHit hit;
        //if (Physics.Raycast(ray,out hit,100,Layer))
        //{
        //    if (hit.collider.gameObject.name == "Cube")
        //    {
        //      Debug.DrawLine(transform.position,hit.point,Color.red,100);//运行状态下Scene的场景中划线
        //        //hit.collider.gameObject.AddComponent<Rigidbody>();
        //        //hit.collider.GetComponent<BoxCollider>().isTrigger = true;
        //    }
        //}

    }
}

 

 辅助工具

 

2.2重点

 

 获得新点：

点击就画一个点：

不用鼠标点击的时候就这样