Unity 5.x BuildAssetBundles 角色换装 基础使用

本文主要原理：
选择模型拆分 成为ab包 然后 根据自己的需要 组合 完成角色换装功能 unity5.x 的换装相对4.x 更新了api 所以更加好用
找了挺多资料的，很多文章都是讲的原理几乎很少代码，相对于我这样的小白根本看不太明白，还是直接上代码直接简单粗暴！大神的世界很难懂！

using UnityEngine;
using UnityEditor;

using System.Collections;
using System.Collections.Generic;
using System.IO;

/// <summary>
/// 创建assetbudles文件
/// </summary>
public class CreateAssetbundles
{
    //手动选择fbx 或者 .prefab 角色模型文件 拆分成为 主骨骼+部件的包[武器,头,身体,等等]
    [MenuItem("Character Generator/Create Assetbundles")]
    static void Execute()
    {
        foreach (Object o in Selection.GetFiltered(typeof(Object),SelectionMode.DeepAssets))
        //foreach (Object o in Selection.objects)
        {
            if (!(o is GameObject)) continue;
            if (o.name.Contains("@")) continue;
            if (!AssetDatabase.GetAssetPath(o).Contains("/Model/")) continue;

            GameObject characterFBX = (GameObject)o;
            string name = characterFBX.name.ToLower();

            Debug.Log("****** Creating assetbundles for : " + name + "****** o.name : " + o.name);

            // Create a directory to store the generated assetbundles.
            if (!Directory.Exists(AssetbundlePath))
            {
                Directory.CreateDirectory(AssetbundlePath);
            }
            // Delete existing assetbundles for current character.
            string[] existingAssetbundles = Directory.GetFiles(AssetbundlePath);
            foreach (string bundle in existingAssetbundles)
            {
                if ((bundle.EndsWith(".assetbundle") || bundle.EndsWith(".manifest")) && bundle.Contains(name))//"\\Model\\" + 
                {
                    File.Delete(bundle);
                }
            }
            GameObject charactorClone = (GameObject)Object.Instantiate(characterFBX);
            // we need delete the trashy bones 
            foreach (SkinnedMeshRenderer smr in charactorClone.GetComponentsInChildren<SkinnedMeshRenderer>())
            {
                Object.DestroyImmediate(smr.gameObject);
            }

            charactorClone.AddComponent<SkinnedMeshRenderer>();
            Object charactorBasePrefab = GetPrefab(charactorClone, "charactorbase");

            // Create the array of bundle build details.
            string cloneRes = AssetDatabase.GetAssetPath(charactorBasePrefab);
            //Debug.Log(cloneRes);

            //unity 5.x 的换装颠覆4.x以前的版本 
            //相比官方的4.x 收集材质 骨骼 信息 简单粗暴，几乎就是直接把prefab打包 啥都不用管
            AssetBundleBuild[] buildMap = new AssetBundleBuild[1];

            buildMap[0].assetBundleName = name + "_charactorbase";//打包资源名称
            buildMap[0].assetBundleVariant = "assetbundle";//扩展名称
            buildMap[0].assetNames = new string[] { cloneRes };//直接打包根骨骼 完整prefab路径 后缀.prefab
            BuildPipeline.BuildAssetBundles(Application.dataPath + "/assetbundles",buildMap,BuildAssetBundleOptions.None,EditorUserBuildSettings.activeBuildTarget);
            AssetDatabase.DeleteAsset(cloneRes);

            // Create assetbundles for each SkinnedMeshRenderer
            foreach (SkinnedMeshRenderer smr in characterFBX.GetComponentsInChildren<SkinnedMeshRenderer>(true))
            {
                GameObject rendererClone = (GameObject)Object.Instantiate(smr.gameObject);
                Object rendererPrefab = GetPrefab(rendererClone, smr.name);

                // Save the assetbundle.
                string bundleName = name + "_" + smr.name.ToLower();

                buildMap = new AssetBundleBuild[1];
                buildMap[0].assetBundleName = bundleName;//打包资源名称
                buildMap[0].assetBundleVariant = "assetbundle";//扩展名称

                string[] assets = new string[1];
                assets[0] = AssetDatabase.GetAssetPath(rendererPrefab);
                buildMap[0].assetNames = assets;//同理 直接打包部件资源包

                BuildPipeline.BuildAssetBundles(Application.dataPath + "/assetbundles", buildMap, 0, EditorUserBuildSettings.activeBuildTarget);
                // Delete temp assets.
                AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(rendererPrefab));
                //到这里整个模型就拆分结束了，剩下的就是加载了
            }
        }
    }
    //手动设置资源的AssetBundle的名称和文件扩展名 
    [MenuItem("Character Generator/SetFileBundleName")]
    static void SetBundleName()
    {

        #region 设置资源的AssetBundle的名称和文件扩展名
        UnityEngine.Object[] selects = Selection.objects;
        foreach (UnityEngine.Object selected in selects)
        {
            string path = AssetDatabase.GetAssetPath(selected);
            AssetImporter asset = AssetImporter.GetAtPath(path);
            asset.assetBundleName = selected.name; //设置Bundle文件的名称
            asset.assetBundleVariant = "assetbundle";//设置Bundle文件的扩展名
            asset.SaveAndReimport();

        }
        AssetDatabase.Refresh();
        #endregion
    }

    //替换空Prefab
    static Object GetPrefab(GameObject go, string name)
    {
        Object tempPrefab = PrefabUtility.CreateEmptyPrefab(AssetbundleCreatePath + name + ".prefab");
        tempPrefab = PrefabUtility.ReplacePrefab(go, tempPrefab);
        Object.DestroyImmediate(go);
        return tempPrefab;
    }
    //打包的文件路径
    public static string AssetbundlePath
    {
        get { return "Assets" + Path.DirectorySeparatorChar + "assetbundles" + Path.DirectorySeparatorChar; }// \ \
    }

    public static string AssetbundleCreatePath
    {
        get { return "Assets/assetbundles/"; }
    }

    /// <summary>
    /// 不同平台下StreamingAssets的路径[这里没用到]
    /// </summary>
    public static string PathUrl
    {
        //不同平台下StreamingAssets的路径是不同的，这里需要注意一下。
       get{
            return

            #if UNITY_ANDROID
                    "jar:file://" + Application.dataPath + "!/assets/";
            #elif UNITY_IPHONE
                    Application.dataPath + "/Raw/";
            #elif UNITY_STANDALONE_WIN || UNITY_EDITOR
                    "file://" + Application.dataPath + "/StreamingAssets/";
            #else
                    string.Empty;
            #endif
       }
    }
}