Unity3D AI导航 Navigation

淡淡的烟草味﹌ 2024-04-17 18:17 79阅读 0赞

## 设置步骤： ##

1.  调出Navigation面板：Window -> AI -> Navigation  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70]
2.  选择所有环境物体（静止物体），勾选【Navigation Static】,如果是不连接的对象勾选【Navigation OffMesh】  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 1]
3.  设置环境物体（静止物体）是否能通过，山体、墙设置【Not Walkable】，平面设置【Walkable】  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 2]
4.  其他数据都调整完成后，可以点击【back】按钮。（圆柱体的半径越小，导航的边缘空白越小）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 3]
5.  选择移动物体，添加 Navigation -> Nav Mesh Agent，还有刚体（Rigidbody）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 4]

## 设置脚本 ##

1.  脚本调用navigation组件，必须先引用包：`using UnityEngine.AI;`
2.  通过摄像机屏幕点击获取射线对象：`Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);`
3.  射线是否有碰撞对象：`Physics.Raycast(ray,out hit, 20)` “hit”是射线碰撞的点对象，“20”是射线最远距离
4.  设置导航组件的终点：`nav.SetDestination(hit.point);`

public class NavigationTest : MonoBehaviour
    {
        //先引用UnityEngine.AI包
        private NavMeshAgent nav;
    
        // Start is called before the first frame update
        void Start()
        {
            //获取导航组件
            nav = GetComponent<NavMeshAgent>();
        }
    
        // Update is called once per frame
        void Update()
        {
            //判断用户是否按鼠标左键
            if (Input.GetButtonDown("Fire1"))
            {
                //通过摄像机屏幕点击获取射线对象
                Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
                //碰撞对象变量
                RaycastHit hit;
                //判断射线是否有碰撞对象，射线长度限制为20
                if(Physics.Raycast(ray,out hit, 20))
                {
                    //设置导航组件的终点，有了终点导航就会指引物体移动
                    nav.SetDestination(hit.point);
                }
            }
        }
    }

### 讲解Area用法：[https://blog.csdn.net/shenqiankk/article/details/100145696][https_blog.csdn.net_shenqiankk_article_details_100145696] ###

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/afa18027093248a1940bca4e4fcd4777.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/c4db42f5e06243cd9eba926e4cca56a9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 3]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/73759901875f40c39bb9f3786860bf16.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoZW5xaWFua2s_size_16_color_FFFFFF_t_70 4]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/c36e01be9d304a0e937dfe70f393d5d4.png
[https_blog.csdn.net_shenqiankk_article_details_100145696]: https://blog.csdn.net/shenqiankk/article/details/100145696