A* Pathfinding 使用方法

A*Pathfinding使用方法

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A*Pathfinding使用方法

把地面层级设置为Ground ,地面上的障碍物(树,房子,墙等)设置为Obstracles层 在场景中创建一个新的游戏对象，命名为"A *",为物体添加AstarPath.cs脚本 AstarPath的面板属性->Grahps->Add New Graph ->选择一个创建地形导航的方式, 选择Grid Graph=方格 AstarPath的面板属性->Grahps->Height testing->Mask->设置为地形层Ground AstarPath的面板属性->Grahps->Collison testing->Mask->设置为地形上的障碍物层Obstracles AstarPath的面板属性->About->Show Graphs 打钩,看到导航网格 AstarPath的面板属性->Grahps->Width * Depth, 设置导航网格的宽度和高度,调整为覆盖地形的长度 AstarPath的面板属性->Grahps-> Node Size: 设置导航网格中的方格大小,方格越小精度越高 设置AstarPath的面板属性->About->Scan按钮, 生成网格

角色导航的操作如下: 为角色添加胶囊碰撞体,添加Seeker.cs脚本 下面是一个鼠标点击地面的操作 usingUnityEngine; usingSystem.Collections.Generic; usingPathfinding; publicclassTest:MonoBehaviour {    privateSeekerseeker;    privateList<Vector3> vPath;    voidAwake()     {         seeker = GetComponent<Seeker>();     }    voidUpdate()     {        if(Input.GetMouseButtonDown(1))         {            Rayray =Camera.main.ScreenPointToRay(Input.mousePosition);//射线,从摄像机到鼠标位置的一条射线            RaycastHitraycastHit;//碰撞体信息            if(Physics.Raycast(ray,outraycastHit, 81f))             {                //raycastHit.point碰撞到的点                 seeker.StartPath(transform.position,raycastHit.point , OnPathComplete);             }         }        if(vPath!=null&& vPath.Count > 1)         {            for(inti = 0; i < vPath.Count; i++)             {                inti2 = i + 1;                if(i2 <= vPath.Count - 1)                 {                    Debug.DrawLine(vPath[i],vPath[i2],Color.green);                 }             }         }     }    voidOnPathComplete(Pathp)     {        if(!p.error)         {            ABPathabPath = pasABPath;            if(abPath ==null)             {                Debug.Log("This function only handles ABPaths, do not use special path types");             }            //Claim the new path             p.Claim(this);            // Path couldn't be calculated of some reason.            // More info in p.errorLog (debug string)            if(p.error)             {                 p.Release(this);                return;             }            vPath = abPath.vectorPath;         }        else         {            Debug.Log("Yay, we got a path back. Did it have an error? " + p.error);         }     } }