1 using System.Collections.Generic;
2 using System.IO;
3 using UnityEditor;
4 using UnityEngine;
5
6 class CreateAssetbundles
7 {
8 // This method creates an assetbundle of each SkinnedMeshRenderer
9 // found in any selected character fbx, and adds any materials that
10 // are intended to be used by the specific SkinnedMeshRenderer.
11 [MenuItem("Character Generator/Create Assetbundles")]
12 static void Execute()
13 {
14 bool createdBundle = false;
15 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。
16
17
18 {
19 if (!(o is GameObject)) continue;//如果不是GameObject就跳过本次循环
20 if (o.name.Contains("@")) continue;//如果是动画片段就跳过本次循环
21 if (!AssetDatabase.GetAssetPath(o).Contains("/characters/")) continue;//如果含有指定的目录名就跳过本次循环
22
23 GameObject characterFBX = (GameObject)o;//将o强制转换为GameObject
24 string name = characterFBX.name.ToLower();//获取名字
25
26 Debug.Log("******* Creating assetbundles for: " + name + " *******");
27
28 // Create a directory to store the generated assetbundles.
29 if (!Directory.Exists(AssetbundlePath))//检查AssetbundlePath是否存在
30 Directory.CreateDirectory(AssetbundlePath);//如果不存在就创建目录
31
32
33 // Delete existing assetbundles for current character.
34 string[] existingAssetbundles = Directory.GetFiles(AssetbundlePath);//获取AssetbundlePath目录下的文件
35 foreach (string bundle in existingAssetbundles)
36 {
37 if (bundle.EndsWith(".assetbundle") && bundle.Contains("/assetbundles/" + name))//删除重复的文件
38 File.Delete(bundle);
39 }
40
41 // Save bones and animations to a seperate assetbundle. Any
42 // possible combination of CharacterElements will use these
43 // assets as a base. As we can not edit assets we instantiate
44 // the fbx and remove what we dont need. As only assets can be
45 // added to assetbundles we save the result as a prefab and delete
46 // it as soon as the assetbundle is created.
47 GameObject characterClone = (GameObject)Object.Instantiate(characterFBX);//克隆一个GO
48 foreach (SkinnedMeshRenderer smr in characterClone.GetComponentsInChildren<SkinnedMeshRenderer>())//得到子物体的SkinnedMeshRenderer组件不包括Inactive
49 Object.DestroyImmediate(smr.gameObject);//销毁资源
50 characterClone.AddComponent<SkinnedMeshRenderer>();//添加SkinnedMeshRenderer组件到Clone体
51 Object characterBasePrefab = GetPrefab(characterClone, "characterbase");//得到一个预制件，并销毁clone体
52 string path = AssetbundlePath + name + "_characterbase.assetbundle";//路径及文件名
53 BuildPipeline.BuildAssetBundle(characterBasePrefab, null, path, BuildAssetBundleOptions.CollectDependencies);//建一个压缩的unity3d文件，包含资源的集合
54 AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(characterBasePrefab));//销毁预制件
55
56 // Collect materials.
57 List<Material> materials = EditorHelpers.CollectAll<Material>(GenerateMaterials.MaterialsPath(characterFBX));//获取fbx目录下的所有Material
58
59 // Create assetbundles for each SkinnedMeshRenderer.
60 foreach (SkinnedMeshRenderer smr in characterFBX.GetComponentsInChildren<SkinnedMeshRenderer>(true))//获取fbx及子物体的SkinnedMeshRenderer组件包括Inactive
61 {
62 List<Object> toinclude = new List<Object>();
63
64 // Save the current SkinnedMeshRenderer as a prefab so it can be included
65 // in the assetbundle. As instantiating part of an fbx results in the
66 // entire fbx being instantiated, we have to dispose of the entire instance
67 // after we detach the SkinnedMeshRenderer in question.
68 GameObject rendererClone = (GameObject)EditorUtility.InstantiatePrefab(smr.gameObject);//clone给定的预制件
69 GameObject rendererParent = rendererClone.transform.parent.gameObject;//获取父对象
70 rendererClone.transform.parent = null;//清空clone体的父对象引用
71 Object.DestroyImmediate(rendererParent);//摧毁父对象
72 Object rendererPrefab = GetPrefab(rendererClone, "rendererobject");//得到一个预制件，并销毁clone体
73 toinclude.Add(rendererPrefab);//放置到容器中
74
75 // Collect applicable materials.
76 foreach (Material m in materials)
77 if (m.name.Contains(smr.name.ToLower())) toinclude.Add(m);
78
79 // When assembling a character, we load SkinnedMeshRenderers from assetbundles,
80 // and as such they have lost the references to their bones. To be able to
81 // remap the SkinnedMeshRenderers to use the bones from the characterbase assetbundles,
82 // we save the names of the bones used.
83 List<string> boneNames = new List<string>();
84 foreach (Transform t in smr.bones)//获取骨骼
85 boneNames.Add(t.name);
86 string stringholderpath = "Assets/bonenames.asset";
87 AssetDatabase.CreateAsset(new StringHolder(boneNames.ToArray()), stringholderpath);//在指定的路径创建资源
88 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
89
90 // Save the assetbundle.
91 string bundleName = name + "_" + smr.name.ToLower();
92 path = AssetbundlePath + bundleName + ".assetbundle";
93 BuildPipeline.BuildAssetBundle(null, toinclude.ToArray(), path, BuildAssetBundleOptions.CollectDependencies);
94 Debug.Log("Saved " + bundleName + " with " + (toinclude.Count - 2) + " materials");
95
96 // Delete temp assets.
97 AssetDatabase.DeleteAsset(AssetDatabase.GetAssetPath(rendererPrefab));
98 AssetDatabase.DeleteAsset(stringholderpath);
99 createdBundle = true;
100 }
101 }
102
103 if (createdBundle)
104 UpdateCharacterElementDatabase.Execute();
105 else
106 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");
107 }
108
109 static Object GetPrefab(GameObject go, string name)
110 {
111 Object tempPrefab = EditorUtility.CreateEmptyPrefab("Assets/" + name + ".prefab");//创建一个empty预制件
112 tempPrefab = EditorUtility.ReplacePrefab(go, tempPrefab);//将GO替换为tmpPrefab
113 Object.DestroyImmediate(go);//销毁资源
114 return tempPrefab;//返回tmpPrefab
115 }
116
117 public static string AssetbundlePath
118 {
119 get { return "assetbundles" + Path.DirectorySeparatorChar; }
120 }
121 }
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