Unity3D之Mecanim动画系统学习笔记（十）：Mecanim动画的资源加载相关

资源加载是必备的知识点，这里就说说Mecanim动画的资源如何打包及加载。

注意，Unity4.x和Unity5.x的AssetBundle打包策略不一样，本笔记是基于Unity4.x的AssetBundle进行打包的。

我们一般使用FBX类型的模型及动画文件，而动画文件的储存一般有两种情况，一是所有的动画和模型都一起存放到一个文件中，还有一种情况是模型单独一个文件而动画单独一个文件。这里我们就两种情况都看一下。

使用的资源是Unity3D自带的以及从一本教材中取出的两种类型的动画资源，同时需要对其动画创建对应的Animator Controller。

模型动画都存放在一个文件中的情况

一个FBX文件保存了模型、骨骼和动画，如下图：

下面是配置的Animator Controller：

需要注意的是，官方并没有提供为Animator设置Animator Controller的接口，所以我们必须将配置好的GameObject制作为一个预制件进行加载。

Resources加载

 using UnityEngine;
 using System.Collections;

 public class AllInOneResourcesLoad : MonoBehaviour
 {
     private Animator _animator;

     void Start()
     {
         GameObject go = Resources.Load<GameObject>("AllInOne/ConstructorPrefab");

         GameObject man = Instantiate(go) as GameObject;
         _animator = man.GetComponent<Animator>();
     }

     void OnGUI()
     {
         if(GUI.Button(new Rect(, , , ), "idle"))
         {
             _animator.SetBool("walk", false);
             _animator.SetBool("run", false);
         }
         if(GUI.Button(new Rect(, , , ), "walk"))
         {
             _animator.SetBool("walk", true);
             _animator.SetBool("run", false);
         }
         if(GUI.Button(new Rect(, , , ), "run"))
         {
             _animator.SetBool("walk", false);
             _animator.SetBool("run", true);
         }
         if(GUI.Button(new Rect(, , , ), "jump"))
         {
             _animator.SetTrigger("jump");
         }
     }
 }

AssetBundle加载

打包

 using UnityEngine;
 using UnityEditor;

 public class CreateAllInOneAB
 {
     [MenuItem("Tool/CreateAllInOneAB")]
     private static void Create()
     {
         BuildPipeline.BuildAssetBundle(null, new[]
             {
                 AssetDatabase.LoadAssetAtPath("Assets/Resources/AllInOne/ConstructorPrefab.prefab", typeof(GameObject))
             },
             Application.streamingAssetsPath + "/AllInOne.assetbundle",
             BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets | BuildAssetBundleOptions.UncompressedAssetBundle,
             BuildTarget.StandaloneWindows64);
     }
 }

加载

 using UnityEngine;
 using System.Collections;

 public class AllInOneAssetBundleLoad : MonoBehaviour
 {
     private Animator _animator;

     void Start()
     {
         AssetBundle assetBundle = AssetBundle.CreateFromFile(Application.streamingAssetsPath + "/AllInOne.assetbundle");

         GameObject go = assetBundle.Load("ConstructorPrefab", typeof(GameObject)) as GameObject;

         GameObject man = Instantiate(go) as GameObject;
         _animator = man.GetComponent<Animator>();
     }

     void OnGUI()
     {
         if(GUI.Button(new Rect(, , , ), "idle"))
         {
             _animator.SetBool("walk", false);
             _animator.SetBool("run", false);
         }
         if (GUI.Button(new Rect(, , , ), "walk"))
         {
             _animator.SetBool("walk", true);
             _animator.SetBool("run", false);
         }
         if (GUI.Button(new Rect(, , , ), "run"))
         {
             _animator.SetBool("walk", false);
             _animator.SetBool("run", true);
         }
         if (GUI.Button(new Rect(, , , ), "jump"))
         {
             _animator.SetTrigger("jump");
         }
     }
 }

模型动画分开存放的情况

还有一种情况是模型和动画是分为多个FBX文件存放的，比如下面是模型文件：

虽然有一个Take 001的动画，但是实际上我们并不使用该动画，而是使用下面仅保存了动画的FBX文件：

下面是配置的Animator Controller：

除了没有提供设置Animator Controller的接口，也无法在运行时对动画剪辑进行增加删除的操作，所以我们一般打包时就收集所有的依赖项一起打包，归根结底还是只需要一个制作好的预制件即可。

从这个角度看，其实是否将动画进行拆分最终的使用方式都是一样的。

Resources加载

 using UnityEngine;
 using System.Collections;

 public class ResourcesLoad : MonoBehaviour
 {
     private Animator _animator;

     void Start()
     {
         GameObject go = Resources.Load<GameObject>("ZombieNurse/ZombieNursePrefab");

         GameObject man = Instantiate(go) as GameObject;
         _animator = man.GetComponent<Animator>();
     }

     void OnGUI()
     {
         if(GUI.Button(new Rect(, , , ), "idle"))
         {
             _animator.SetBool("run", false);
         }
         if(GUI.Button(new Rect(, , , ), "run"))
         {
             _animator.SetBool("run", true);
         }
         if(GUI.Button(new Rect(, , , ), "attack"))
         {
             _animator.SetTrigger("attack");
         }
         if(GUI.Button(new Rect(, , , ), "dead"))
         {
             _animator.SetTrigger("dead");
         }
     }
 }

AssetBundle加载

打包

 using UnityEditor;
 using UnityEngine;

 public class CreateAB
 {
     [MenuItem("Tool/CreateAB")]
     private static void Create()
     {
         BuildPipeline.BuildAssetBundle(null, new[]
             {
                 AssetDatabase.LoadAssetAtPath("Assets/Resources/ZombieNurse/ZombieNursePrefab.prefab", typeof(GameObject))
             },
             Application.streamingAssetsPath + "/AB.assetbundle",
             BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets | BuildAssetBundleOptions.UncompressedAssetBundle,
             BuildTarget.StandaloneWindows64);
     }
 }

加载

 using UnityEngine;
 using System.Collections;

 public class AssetBundleLoad : MonoBehaviour
 {
     private Animator _animator;

     void Start()
     {
         AssetBundle assetBundle = AssetBundle.CreateFromFile(Application.streamingAssetsPath + "/AB.assetbundle");

         GameObject go = assetBundle.Load("ZombieNursePrefab", typeof(GameObject)) as GameObject;

         GameObject man = Instantiate(go) as GameObject;
         _animator = man.GetComponent<Animator>();
     }

     void OnGUI()
     {
         if(GUI.Button(new Rect(, , , ), "idle"))
         {
             _animator.SetBool("run", false);
         }
         if(GUI.Button(new Rect(, , , ), "run"))
         {
             _animator.SetBool("run", true);
         }
         if(GUI.Button(new Rect(, , , ), "attack"))
         {
             _animator.SetTrigger("attack");
         }
         if(GUI.Button(new Rect(, , , ), "dead"))
         {
             _animator.SetTrigger("dead");
         }
     }
 }