1、打开Unity，新建一个空工程，具体如下图
2、在场景中，简单的布置一些环境物体，并设置为 Static，具体如下图
3、在顶部菜单栏 Window - Navgation， Bake 环境，具体如下图
4、在工程中，新建一个脚本 ArrowFindPath，右键 Open C# Project 打开脚本，进行编辑，具体如下图
5、ArrowFindPath 脚本的具体代码和代码解释如下图
6、ArrowFindPath 脚本具体粝简肯惧内容如下：usingSystem.Collections;usingSystem.Collections.Generic;usingUn足毂忍珩ityEngine;usingUnityEngine.AI;publicclassArrowFindPath:MonoBehaviour{privateNavMeshAgent_navPlayer; privateNavMeshPath_navPath; publicfloattileSpacing=0.5f; publicLineRendererlineGameObject;publicGameObjectdirectionPrefab; privateList<GameObject>arrowList=newList<GameObject>();//Usethisforinitialization voidStart(){ _navPlayer=transform.GetComponent<NavMeshAgent>(); _navPath=newNavMeshPath(); }//Updateiscalledonceperframe voidUpdate(){ if(Input.GetMouseButtonDown(0)){ Rayray=Camera.main.ScreenPointToRay(Input.mousePosition); RaycastHithit; if(Physics.Raycast(ray,outhit,Mathf.Infinity)){ print("hit:"+hit.point); _navPlayer.SetDestination(hit.point); NavMesh.CalculatePath(transform.position,hit.point,NavMesh.AllAreas,_navPath); DrawPath(_navPath); } } }///<summary> ///Drawsthepath. ///</summary> ///<paramname="navPath">Navpath.</param> voidDrawPath(NavMeshPathnavPath) { List<GameObject>arrows=arrowList; StartCoroutine(ClearArrows(arrows)); arrowList.Clear(); //Ifthepathhas1ornocorners,thereisnoneedtodrawtheline if(navPath.corners.Length<2) { print("navPath.corners.Length<2"); return; }//Setthearrayofpositionstotheamountofcorners... lineGameObject.positionCount=navPath.corners.Length; Quaternionplanerot=Quaternion.identity; for(inti=0;i<navPath.corners.Length;i++) { //Gothrougheachcornerandsetthattothelinerenderer'sposition... lineGameObject.SetPosition(i,navPath.corners[i]); floatdistance=0; Vector3offsetVector=Vector3.zero; if(i<navPath.corners.Length-1) { //planerotationcalculation offsetVector=navPath.corners[i+1]-navPath.corners[i]; planerot=Quaternion.LookRotation(offsetVector); distance=Vector3.Distance(navPath.corners[i+1],navPath.corners[i]); if(distance<tileSpacing) continue;planerot=Quaternion.Euler(90,planerot.eulerAngles.y,planerot.eulerAngles.z);//planepositioncalculation floatnewSpacing=0; for(intj=0;j<distance/tileSpacing;j++) { newSpacing+=tileSpacing; varnormalizedVector=offsetVector.normalized; varposition=navPath.corners[i]+newSpacing*normalizedVector; GameObjectgo=Instantiate(directionPrefab,position+Vector3.up,planerot); arrowList.Add(go); } } else { GameObjectgo=Instantiate(directionPrefab,navPath.corners[i]+Vector3.up,planerot); arrowList.Add(go); } } }///<summary> ///Clearsthearrows. ///</summary> ///<returns>Thearrows.</returns> ///<paramname="arrows">Arrows.</param> privateIEnumeratorClearArrows(List<GameObject>arrows) { if(arrowList.Count==0) yieldbreak;foreach(vararrowinarrows) Destroy(arrow); }}
7、在场景中添加一个 Capsule，并在上面添加一个 NavMeshAgent，具体如下图
8、在场景中，新建一个 GameObject，命名为 LineRenderer，并在上面添加一个LineRenderer组件，具体如下图
9、导入一个箭头的 图片，并修改成精灵图，拖到场景中，调整好合适的精灵图比例，在拖到工程中，作为预制体，具体如下图
10、选中场景中的 Capsule，添加脚本ArrowFindPath，赋值 LineRenderer 和 箭头预制体，具体如下图
11、运行场景，在场景中随便点击们就会生成，箭头路线，具体如下图
12、到此，《Unity 实用教程之 Nav导航箭头路线绘制生成》讲解结束，谢谢
