（一）适用情况

当游戏主角进入特定的场景或者关卡，每个关卡需要加载不同位置的模型，道具等。这些信息需要先在unity编辑器里面配置好，一般由策划干这事，然后把这些位置道具信息保存在文件，当游戏主角进入后根据保存的文件信息加载模型道具。如 跑酷场景的金币 赛车赛道的道具 

（二）实例文件格式 Json

需要导入SimpleJson 具体使用方法可以看我另外一篇《》，有详细介绍 

（三）图例

 

PathPropManager节点管理所有的道具信息.

（四）示例代码

//道具类型;public enum PropsType{    PT_ACCEL = 0,    PT_MISSILE = 1,    PT_BULLET = 2,    PT_SHIELD = 3,    PT_NONE = 4,}

/* * filename : PathPropManager.cs ; * function : 道具点管理编辑; **/#if UNITY_EDITORusing UnityEngine;using System.Collections;using System.Collections.Generic;using System.IO;using UnityEditor;using PathEdit;public class PathPropManager : MonoBehaviour {    private PathProp[] mPathPropList; // 所有的道具点;    public TextAsset mData = null;  //道具点xml存储文件;    public PropsType type = PropsType.PT_ACCEL; //默认道具;    public bool AlignGround = true;     //是否对齐地面;    public int Layer = 0;               //地面层级;    public float GroundHeight = 0.5f;  //离地面距离;    public bool ShowIcon = true;    //是否用图片显示路点上的道具;    public bool ShowCube = true;    //是否用方块显示路点上的道具;    void Awake()    {    }    //刷新所有道具点;    private void UpdateList()    {        mPathPropList = transform.GetComponentsInChildren
      
       ();    }    //当删除某个道具点后自动重新计算序号;    public void ResetList()    {        UpdateList();        for (int i = 0; i < mPathPropList.Length; i++)        {            mPathPropList[i].gameObject.name = i.ToString();            mPathPropList[i].index = i;        }    }    //从json表中重新加载道具会清除当前编辑的所有道具;    public bool CreatePropBySaveData()    {        if (mPathPropList == null)        {            return false;        }        string fullPath = UnityEditor.AssetDatabase.GetAssetPath(mData);        if (string.IsNullOrEmpty(fullPath))        {            Debug.LogError("文件路径发生错误.");            return false;        }        int startIndex = ("Assets/Resources/").Length;        string filestr = fullPath.Substring(startIndex, fullPath.LastIndexOf('.') - startIndex);        PathPropReader wpr = new PathPropReader(filestr);        List
       
         ppsa =  wpr.Reader();        if (ppsa == null)        {            Debug.LogError("加载道具配置表失败");        }        Transform[] trans = transform.GetComponentsInChildren
        
         ();        foreach (Transform child in trans)        {            if (child == transform)            {                continue;            }            DestroyImmediate(child.gameObject);        }        for (int i = 0; i < ppsa.Count; i++)        {            GameObject go = new GameObject();            go.transform.parent = transform;            go.name = ppsa[i].index.ToString();                       go.transform.position = ppsa[i].position;            go.transform.rotation = Quaternion.Euler(ppsa[i].rotation);            go.transform.localScale = ppsa[i].scale;            PathProp pp = go.AddComponent
         
          ();            pp.index = ppsa[i].index;            pp.type = ppsa[i].type;        }        return true;    }    //保存道具点信息到json;    public bool CreateXmlByProps()    {        UpdateList();        if (mData == null)        {            Debug.LogError("没有找到保存的路径,请拖动一个json文件到PathPropManager的第一个参数.");            return false;        }        string fullPath = UnityEditor.AssetDatabase.GetAssetPath(mData);        if (string.IsNullOrEmpty(fullPath))        {            Debug.LogError("文件路径发生错误.");            return false;        }        int startIndex = ("Assets/Resources/").Length;        string filestr = fullPath.Substring(startIndex, fullPath.LastIndexOf('.') - startIndex);        PathPropReader pr = new PathPropReader(filestr);        return pr.SaveData(mPathPropList);    }    //添加新的道具点;    public void AddProp()    {        UpdateList();        GameObject go = new GameObject();        go.transform.parent = transform;        go.name = (mPathPropList.Length).ToString();        PathProp pp = go.AddComponent
          
           ();        if (mPathPropList != null)        {            if (mPathPropList.Length < 1)            {                //生成的路标点移动到视窗内;                Debug.Log("move to view");                UnityEditor.EditorApplication.ExecuteMenuItem("GameObject/Move To View");            }            else            {                SetPathPropPos(go.transform, mPathPropList.Length - 1);            }        }        pp.index = mPathPropList.Length;        UnityEditor.Selection.activeTransform = go.transform;        //UnityEditor.EditorApplication.ExecuteMenuItem("Edit/Lock View to Selected");    }    //生成的道具点在最后一个路标点的前方,index为前一个路标的index;    private bool SetPathPropPos(Transform trans, int index)    {        if (index < 0 || index >= mPathPropList.Length)        {            return false;        }        Vector3 pos = mPathPropList[index].transform.position + Vector3.up * 10f;        Quaternion q = mPathPropList[index].transform.rotation;        //生成的路标点在最后一个路标点的前方;        //当前位置 = 上个路标点位置 + 上个路标点旋转 * 世界位置前 * 最大两点距离;        trans.position = pos + q * Vector3.forward * (10);        trans.rotation = q;        return true;    }    void OnDrawGizmos()    {        UpdateList();        if (UnityEditor.Selection.activeTransform == null)        {            return;        }        //移动路点更新数据;        if (UnityEditor.Selection.activeTransform.parent == transform)        {            int temIndex = int.Parse(UnityEditor.Selection.activeTransform.name);            for (int i = 0; i < mPathPropList.Length; i++)            {                PathProp pp = mPathPropList[i].GetComponent
           
            (); if (pp == null) { Debug.LogError("get PathProp failed,i=" + i); return; } if (temIndex == pp.index) { if (AlignGround == false) { break; } //对齐地面; RaycastHit hit; if (Physics.Raycast(UnityEditor.Selection.activeTransform.position, -Vector3.up, out hit, 100.0f, 1 << Layer)) { //float dis = Vector3.Distance(Selection.activeTransform.position, hit.point); //调整高度; UnityEditor.Selection.activeTransform.position = new Vector3(UnityEditor.Selection.activeTransform.position.x, hit.point.y + GroundHeight, UnityEditor.Selection.activeTransform.position.z); } } } } //绘图; for (int i = 0; i < mPathPropList.Length; i++) { if (ShowIcon) { string str = ""; switch(mPathPropList[i].type) { case PropsType.PT_ACCEL: str = "js"; break; case PropsType.PT_BULLET: str = "zd"; break; case PropsType.PT_MISSILE: str = "dd"; break; case PropsType.PT_SHIELD: str = "fy"; break; } Gizmos.DrawIcon(mPathPropList[i].transform.position, str + ".png"); } if (ShowCube) { Gizmos.color = Color.red; Gizmos.DrawCube(mPathPropList[i].transform.position,Vector3.one); } } }}#endif
           
          
         
        
       
      

/* * filename : PathPropManagerWindow.cs ; * function : 道具点管理自定义编辑; **/using UnityEngine;using System.Collections;using UnityEditor;using System.IO;[CustomEditor(typeof(PathPropManager))]public class PathPropManagerWindow : Editor{    private PathPropManager mPathPropManager = null;    void OnEnable()    {    }    public override void OnInspectorGUI()    {        mPathPropManager = target as PathPropManager;        if (mPathPropManager == null)            return;        EditorGUILayout.Space();        GUILayout.BeginHorizontal();        //刷新路标点;        if (GUILayout.Button("ReLoad", GUILayout.Height(20)))        {            mPathPropManager.CreatePropBySaveData();        }                    //获取Json文件数据        mPathPropManager.mData = (TextAsset)EditorGUILayout.ObjectField(mPathPropManager.mData, typeof(TextAsset), false);        GUILayout.EndHorizontal();        EditorGUILayout.Space();        mPathPropManager.type = (PropsType)EditorGUILayout.EnumPopup("DefaultProp", mPathPropManager.type);        mPathPropManager.Layer = EditorGUILayout.LayerField("AligndLayer", LayerMask.NameToLayer("Floor"));        mPathPropManager.AlignGround = EditorGUILayout.Toggle("AlignGround", mPathPropManager.AlignGround);        mPathPropManager.GroundHeight = EditorGUILayout.FloatField("GroundHeight", mPathPropManager.GroundHeight);        mPathPropManager.ShowIcon = EditorGUILayout.Toggle("ShowIcon", mPathPropManager.ShowIcon);        mPathPropManager.ShowCube = EditorGUILayout.Toggle("ShowCube", mPathPropManager.ShowCube);                EditorGUILayout.Space();        GUILayout.BeginHorizontal();        //保存到Json文件;        if (GUILayout.Button("SaveToXml", GUILayout.Height(20)))        {            if (mPathPropManager.CreateXmlByProps())            {                Debug.Log("保存成功");            }        }        GUILayout.EndHorizontal();        EditorGUILayout.Space();        //标记路点已改变;        EditorUtility.SetDirty(mPathPropManager);    }}

/* * filename : PathPropReader.cs ; * function : 道具点l读取; **/using UnityEngine;using System.Collections;using System.Collections.Generic;    public class PathPropAttributes    {        public int index { get; set; }        public Vector3 position { get; set; }        public Vector3 rotation { get; set; }        public Vector3 scale { get; set; }        public PropsType type { get; set; }    }    public class PathPropReader    {        private string mPath { get; set; }        private List
      
        mWpAList = new List
       
        ();        // resources目录下的相对路径;如路径为Assets/Resouces/Xml/PathWayPoint/test.xml，path = Xml/PathWayPoint/test        public PathPropReader(string path)        {            if (mWpAList == null)            {                mWpAList = new List
        
         ();            }            if (string.IsNullOrEmpty(path))            {                return;            }            mPath = path;        }        public List
         
           GetPositionList()        {            return mWpAList;        }        public List
          
            Reader()        {            if (string.IsNullOrEmpty(mPath))            {                Debug.LogError("没有找到读取的路径.");                return null;            }            mWpAList.Clear();            //读入;            TextAsset ta = (TextAsset)Resources.Load(mPath);            if (ta == null)            {                Debug.LogError("load props txt failed.path = "+mPath);                return null;            }            string txt = ta.text;            SimpleJSON.JSONArray jsArray = SimpleJSON.JSON.Parse(txt).AsArray;            for (int i = 0; i < jsArray.Count; i++)            {                SimpleJSON.JSONNode node = jsArray[i];                PathPropAttributes wpa = new PathPropAttributes();                wpa.index = node["index"].AsInt;                wpa.position = Helper.StringToVector3(Helper.DeleteChar(node["position"], '(', ')'));                wpa.rotation = Helper.StringToVector3(Helper.DeleteChar(node["rotation"], '(', ')'));                wpa.scale = Helper.StringToVector3(Helper.DeleteChar(node["scale"], '(', ')'));                wpa.type = (PropsType)System.Enum.Parse(typeof(PropsType), node["type"]);                mWpAList.Add(wpa);            }            return mWpAList;        }#if UNITY_EDITOR        public bool SaveData(PathProp[] pathProps)        {            if (string.IsNullOrEmpty(mPath))            {                Debug.LogError("没有找到保存的路径.");                return false;            }            if (pathProps.Length <= 0)            {                Debug.LogError("至少有一个道具点才能保存.");                return false;            }            //读入;            TextAsset ta = (TextAsset)Resources.Load(mPath);            string txt = ta.text;            SimpleJSON.JSONArray jsArray = SimpleJSON.JSON.Parse(txt).AsArray;            jsArray.RemoveAll();            string str = "{\"index\":\"0000\", \"position\":\"0000\" , \"rotation\":\"0000\", \"scale\":\"0000\" , \"type\":\"0000\"}";            for (int j = 0; j < pathProps.Length; j++)            {                SimpleJSON.JSONNode newNode = SimpleJSON.JSON.Parse(str);                newNode["index"].Value = pathProps[j].index.ToString();                newNode["position"] = pathProps[j].gameObject.transform.position.ToString();                newNode["rotation"] = pathProps[j].gameObject.transform.rotation.eulerAngles.ToString();                newNode["scale"] = pathProps[j].gameObject.transform.localScale.ToString();                newNode["type"] = pathProps[j].type.ToString();                jsArray.Add(newNode);            }            //写入;            string fp = Application.dataPath + "/Resources/" + mPath + ".json";            byte[] myByte = System.Text.Encoding.UTF8.GetBytes(jsArray.ToString());            using (System.IO.FileStream stream = new System.IO.FileStream(fp, System.IO.FileMode.Create))            {                stream.Write(myByte, 0, myByte.Length);            }            return true;        }#endif    }