Unity3D - Animator Controller循环依赖

问题

假设有2个Animator Controller，分别命名为TestControllerLhs.controller以及TestControllerRhs.controller。在TestControllerLhs.controller中设置状态如下：

TestControllerLhs.controller

当拷贝了包含Transitions并且该Transitions的Dst State不存在的Animator State到另一个Animator Controller时，就会出现游离依赖数据。以TestControllerLhs.controller为例，查看该文件能够发现，Attack01包含了Transitions数据：

Attack01包含的Transition

该Transition的Dst State为Attack02。如果我们拷贝Attack01但没有拷贝Attack02到TestControllerRhs.controller，那么就出现了游离依赖数据：

TestControllerRhs.controller

游离依赖数据

出现依赖的原因是该Transition的Dst State，即Attack02，仍然位于TestControllerLhs.controller中，没有被拷贝过来。说该数据是游离的原因是在TestControllerRhs.controller中，我们完全看不见他，也无法删除它。

在这里注意到这个问题的原因是，美术在制作Animator Controller时经常会使用拷贝、黏贴的操作，很容易在无意间产生游离依赖数据，而最关键也最严重的问题是循环依赖，即A.controller依赖B.controller，并且B.controller依赖A.controller。如果这两个Controller都是AssetBundle的话，就会产生无限依赖加载。

解决方案

通过之前的游离依赖数据分析可知他们的共性为m_DstState项包含了所依赖的.controller文件的guid，因此我们通过读取.controller文件将这些游离依赖数据删除。
以下的代码包含了检测循环依赖，打印依赖的Animator Controller以及去除游离依赖数据的功能，开发版本为Unity 5.5.2f1：

 /******************************************************************************
  * DESCRIPTION: AnimatorController处理器
  *
  *     Copyright (c) 2017, 谭伟俊 (TanWeijun)
  *     All rights reserved
  *
  * COMPANY:
  * CREATED: 2017.09.20, 15:48, CST
 *******************************************************************************/

 using System.IO;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
 using UnityEditor.Animations;
 using GameFramework;

 public class AnimatorControllerProcessor
 {
     [MenuItem("Assets/Artist Tools/Animator Controller/Correct Data")]
     private static void CorrectData()
     {
         string block = null;
         bool isDependOtherAnimatorController = false;
         AnimatorController animatorController = Selection.activeObject as AnimatorController;
         string filePathName = Path.GetFullPath(AssetDatabase.GetAssetPath(animatorController));
         string tempFilePathName = Application.dataPath + "/" + System.DateTime.Now.Ticks.ToString() + ".controller";
         using (StreamWriter writer = File.CreateText(tempFilePathName))
         {
             using (StreamReader reader = File.OpenText(filePathName))
             {
                 string content;
                 while (null != (content = reader.ReadLine()))
                 {
                     if (content.StartsWith("--- !u"))
                     {
                         if (!string.IsNullOrEmpty(block))
                             writer.Write(block);

                         block = content + System.Environment.NewLine;
                         isDependOtherAnimatorController = false;
                     }
                     else
                     {
                         if (isDependOtherAnimatorController)
                             continue;

                         if (string.IsNullOrEmpty(block))
                             writer.WriteLine(content);
                         else
                         {
                             block += (content + System.Environment.NewLine);

                             // 检测是否依赖其他的Animator Controller
                             if (content.Contains("m_DstState:") && content.Contains("guid"))
                             {
                                 block = null;
                                 isDependOtherAnimatorController = true;
                             }
                         }
                     }
                 }

                 // 写入最后的数据
                 if (!string.IsNullOrEmpty(block))
                     writer.Write(block);
             }
         }

         FileUtil.ReplaceFile(tempFilePathName, filePathName);
         AssetDatabase.Refresh();
     }

     [MenuItem("Assets/Artist Tools/Animator Controller/Collect Animator Controller Dependencies")]
     private static void CollectAnimatorControllerDependencies()
     {
         AnimatorController animatorController = Selection.activeObject as AnimatorController;
         string[] dependencyArray = AssetDatabase.GetDependencies(AssetDatabase.GetAssetPath(animatorController));

         Log.Debug("************************* Animator Controller Dependencies (" + animatorController.name + ") *************************");
         foreach (string dependency in dependencyArray)
         {
             if (dependency.EndsWith(".controller"))
                 Log.Debug(dependency);
         }
         Log.Debug("************************************************* End *************************************************");
     }

     [MenuItem("ArtistTools/Check Animator Controller Dependencies")]
     private static void CheckAnimatorControllerDependencies()
     {
         List<string> dependencyCheckNameList = new List<string>();
         string[] filePathNameArray = Directory.GetFiles(Application.dataPath + "/BundleResources/Animator", "*.controller", SearchOption.TopDirectoryOnly);
         foreach (string filePathName in filePathNameArray)
         {
             string[] dependencyArray = AssetDatabase.GetDependencies(filePathName.Substring(filePathName.IndexOf("/Assets/") + ));
             foreach (string dependency in dependencyArray)
             {
                 if (dependency.EndsWith(".controller"))
                 {
                     string assetName = Path.GetFileNameWithoutExtension(filePathName);
                     string dependencyName = Path.GetFileNameWithoutExtension(dependency);

                     // A依赖于B，如果"B_A"存在，表示B也依赖于A，则是循环依赖
                     string checkName = dependencyName + "_" + assetName;
                     if (dependencyCheckNameList.Contains(checkName))
                         Log.Debug(Path.GetFileName(filePathName) + " and " + Path.GetFileName(dependency) + " depend each other");

                     dependencyCheckNameList.Add(assetName + "_" + dependencyName);
                 }
             }
         }
     }

     [MenuItem("Assets/Artist Tools/Animator Controller/Correct Data", true)]
     [MenuItem("Assets/Artist Tools/Animator Controller/Collect Animator Controller Dependencies", true)]
     private static bool ValidateCorrectData()
     {
         return Selection.activeObject is AnimatorController;
     }
 }

打印依赖的Animator Controller：

TestControllerLhs依赖TestControllerRhs

TestControllerRhs依赖TestControllerLhs

检测循环依赖：

循环依赖

使用工具清理游离依赖数据后：

除了自身不再依赖其他的Animator Controller

本文固定链接: http://www.cnblogs.com/twjcnblog/p/7663048.html
转载请注明: EnigmaJJ 2017年10月13日 于 cnblog 发表