Unity 实现场景物体连线功能

演示效果

实现方案

1.创建一个用于连线的正方体

2.创建一个线条渲染的空物体，添加LinerRender组件

3.创建一个脚本

4.编写脚本的内容

附上代码片段

 public LineRenderer lineRenderer;
 private float distance;
 // Update is called once per frame
 void Update()
 {
     var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
     RaycastHit hit;
     if (Input.GetMouseButtonDown(0))
     {
         if (Physics.Raycast(ray, out hit))
         {
             lineRenderer.SetPosition(0, hit.transform.position);
             distance = Vector3.Distance(hit.transform.position, Camera.main.transform.position);
         }
     }
     if (Input.GetMouseButton(0))
     {

         if (Physics.Raycast(ray, out hit))
         {
             if (hit.collider != null)
             {
                 var mousePoint = Input.mousePosition;
                 mousePoint.z = distance;
                 lineRenderer.SetPosition(1, Camera.main.ScreenToWorldPoint(mousePoint));
             }
         }
     }
     if (Input.GetMouseButtonUp(0))
     {

         if (Physics.Raycast(ray, out hit))
         {
             lineRenderer.SetPosition(1, hit.transform.position);
         }
     }
 }

5.挂载脚本，指定LineRender的引用

6.运行起来就可以看到效果啦