打包资源

using System.Collections.Generic;

using System.IO;

using UnityEditor;

using UnityEngine;



class CreateAssetbundles

{

    // This method creates an assetbundle of each SkinnedMeshRenderer

    // found in any selected character fbx, and adds any materials that

    // are intended to be used by the specific SkinnedMeshRenderer.

    [MenuItem("Character Generator/Create Assetbundles")]

    static void Execute()

    {

        bool createdBundle = false;

        foreach (Object o in Selection.GetFiltered(typeof (Object), SelectionMode.DeepAssets))//返回通过类型和选择模式过滤的当前选择的物体。





        {

            if (!(o is GameObject)) continue;//如果不是GameObject就跳过本次循环

            if (o.name.Contains("@")) continue;//如果是动画片段就跳过本次循环

            if (!AssetDatabase.GetAssetPath(o).Contains("/characters/")) continue;//如果含有指定的目录名就跳过本次循环



            GameObject characterFBX = (GameObject)o;//将o强制转换为GameObject

            string name = characterFBX.name.ToLower();//获取名字

           

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



            // Create a directory to store the generated assetbundles.

            if (!Directory.Exists(AssetbundlePath))//检查AssetbundlePath是否存在

                Directory.CreateDirectory(AssetbundlePath);//如果不存在就创建目录





            // Delete existing assetbundles for current character.

            string[] existingAssetbundles = Directory.GetFiles(AssetbundlePath);//获取AssetbundlePath目录下的文件

            foreach (string bundle in existingAssetbundles)

            {

                if (bundle.EndsWith(".assetbundle") && bundle.Contains("/assetbundles/" + name))//删除重复的文件

                    File.Delete(bundle);

            }



            // Save bones and animations to a seperate assetbundle. Any 

            // possible combination of CharacterElements will use these

            // assets as a base. As we can not edit assets we instantiate

            // the fbx and remove what we dont need. As only assets can be

            // added to assetbundles we save the result as a prefab and delete

            // it as soon as the assetbundle is created.

            GameObject characterClone = (GameObject)Object.Instantiate(characterFBX);//克隆一个GO

            foreach (SkinnedMeshRenderer smr in characterClone.GetComponentsInChildren<SkinnedMeshRenderer>())//得到子物体的SkinnedMeshRenderer组件不包括Inactive

                Object.DestroyImmediate(smr.gameObject);//销毁资源

            characterClone.AddComponent<SkinnedMeshRenderer>();//添加SkinnedMeshRenderer组件到Clone体

            Object characterBasePrefab = GetPrefab(characterClone, "characterbase");//得到一个预制件，并销毁clone体

            string path = AssetbundlePath + name + "_characterbase.assetbundle";//路径及文件名

            BuildPipeline.BuildAssetBundle(characterBasePrefab, null, path, BuildAssetBundleOptions.CollectDependencies);//建一个压缩的unity3d文件，包含资源的集合

            AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(characterBasePrefab));//销毁预制件



            // Collect materials.

            List<Material> materials = EditorHelpers.CollectAll<Material>(GenerateMaterials.MaterialsPath(characterFBX));//获取fbx目录下的所有Material



            // Create assetbundles for each SkinnedMeshRenderer.

            foreach (SkinnedMeshRenderer smr in characterFBX.GetComponentsInChildren<SkinnedMeshRenderer>(true))//获取fbx及子物体的SkinnedMeshRenderer组件包括Inactive

            {

                List<Object> toinclude = new List<Object>();



                // Save the current SkinnedMeshRenderer as a prefab so it can be included

                // in the assetbundle. As instantiating part of an fbx results in the

                // entire fbx being instantiated, we have to dispose of the entire instance

                // after we detach the SkinnedMeshRenderer in question.

                GameObject rendererClone = (GameObject)EditorUtility.InstantiatePrefab(smr.gameObject);//clone给定的预制件

                GameObject rendererParent = rendererClone.transform.parent.gameObject;//获取父对象

                rendererClone.transform.parent = null;//清空clone体的父对象引用

                Object.DestroyImmediate(rendererParent);//摧毁父对象

                Object rendererPrefab = GetPrefab(rendererClone, "rendererobject");//得到一个预制件，并销毁clone体

                toinclude.Add(rendererPrefab);//放置到容器中



                // Collect applicable materials.

                foreach (Material m in materials)

                    if (m.name.Contains(smr.name.ToLower())) toinclude.Add(m);



                // When assembling a character, we load SkinnedMeshRenderers from assetbundles,

                // and as such they have lost the references to their bones. To be able to

                // remap the SkinnedMeshRenderers to use the bones from the characterbase assetbundles,

                // we save the names of the bones used.

                List<string> boneNames = new List<string>();

                foreach (Transform t in smr.bones)//获取骨骼

                    boneNames.Add(t.name);

                string stringholderpath = "Assets/bonenames.asset";

                AssetDatabase.CreateAsset(new StringHolder(boneNames.ToArray()), stringholderpath);//在指定的路径创建资源

                toinclude.Add(AssetDatabase.LoadAssetAtPath(stringholderpath, typeof (StringHolder)));//返回在指定位置stringholderpath下第一个类型是StringHolder的资源对象。并添加到容器中



                // Save the assetbundle.

                string bundleName = name + "_" + smr.name.ToLower();

                path = AssetbundlePath + bundleName + ".assetbundle";

                BuildPipeline.BuildAssetBundle(null, toinclude.ToArray(), path, BuildAssetBundleOptions.CollectDependencies);

                Debug.Log("Saved " + bundleName + " with " + (toinclude.Count - 2) + " materials");



                // Delete temp assets.

                AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(rendererPrefab));

                AssetDatabase.DeleteAsset(stringholderpath);

                createdBundle = true;

            }

        }



        if (createdBundle)

            UpdateCharacterElementDatabase.Execute();

        else

            EditorUtility.DisplayDialog("Character Generator", "No Asset Bundles created. Select the characters folder in the Project pane to process all characters. Select subfolders to process specific characters.", "Ok");

    }



    static Object GetPrefab(GameObject go, string name)

    {

        Object tempPrefab = EditorUtility.CreateEmptyPrefab("Assets/" + name + ".prefab");//创建一个empty预制件

        tempPrefab = EditorUtility.ReplacePrefab(go, tempPrefab);//将GO替换为tmpPrefab

        Object.DestroyImmediate(go);//销毁资源

        return tempPrefab;//返回tmpPrefab

    }



    public static string AssetbundlePath

    {

        get { return "assetbundles" + Path.DirectorySeparatorChar; }

    }

}