BuildPipeline.BuildAssetBundle 编译资源包

原文出自：http://blog.csdn.net/nateyang/article/details/7567831

1.导出。unity3d格式资源：

     http://game.ceeger.com/Script/BuildPipeline/BuildPipeline.BuildAssetBundle.html

    这里我稍微改了一点点~~~代码如下：

using UnityEngine;
using UnityEditor;
using System.IO;
public class BuildAssetBundlesFromDirectory {

    [@MenuItem("Asset/Build AssetBundles From Directory of Files")]

    static void ExportAssetBundles () {

        // Get the selected directory

        //获取选择的目录

        string path = AssetDatabase.GetAssetPath(Selection.activeObject);

        Debug.Log("Selected Folder: " + path);

        if (path.Length != 0) {

            path = path.Replace("Assets/", "");

            string [] fileEntries = Directory.GetFiles(Application.dataPath+"/"+path);

            foreach(string fileName in fileEntries) {

                string filePath = fileName.Replace("\","/");

                int index = filePath.LastIndexOf("/");

                filePath = filePath.Substring(index+1);

                Debug.Log("filePath:"+filePath);

                string localPath = "Assets/" + path+"/";

                if (index > 0)

                localPath += filePath;

                Object t = AssetDatabase.LoadMainAssetAtPath(localPath);

                if (t != null) {

                    Debug.Log(t.name);

                    string bundlePath = "Assets/" + path + "/" + t.name + ".unity3d";

                    Debug.Log("Building bundle at: " + bundlePath);

                    // Build the resource file from the active selection.

                    //从激活的选择编译资源文件

                    BuildPipeline.BuildAssetBundle

                    (t, null, bundlePath, BuildAssetBundleOptions.CompleteAssets);

                }



            }

        }

    }

}

  注意：string filePath = fileName.Replace("\","/");  把“”转化成“/”。“Assets/path/.prefab”和“path.prefab”

把以上代码的脚本放到一个文件夹里面，选中该文件夹，再点击菜单栏上的按钮"Asset/Build AssetBundles From Directory of Files"，就成功转成unity3d格式了

2.加载.unity3d：

function Start () {

    var www = new WWW ("file:///"+Application.dataPath+"/resourse/Cube.unity3d");

    yield www;

    Instantiate(www.assetBundle.mainAsset);

}

注：Application.dataPath获取改程序的资源路径。

function Start ()

{

    var www = WWW.LoadFromCacheOrDownload("http://210.30.12.33:8080/YangChun/file/Cube.unity3d",5);

    yield www;

    if (www.error != null)

    {

        Debug.Log (www.error);

        return;

    }

   Instantiate(www.assetBundle.mainAsset);

}

      我试了一下用Resources类的方法还不能加载unity3d格式的文件。不过如果是本地加载的话直接加载prefab就可以了，用不着用unity3d格式了。貌似

LoadFromCacheOrDownload方法只能加载.unity3d格式文件，我用Tomcat服务器小测了一下，可以达到缓存的效果。

3.加载场景的话：

先把场景转化成unity3d格式的。

注：以下代码的脚本必须放在Editor文件夹下（如果没有改文件，新建一个就行），BuildTarget注意哈，转化成不同的平台~~~BuildTarget.Andrdoid

<pre name="code" class="java">@MenuItem ("Build/BuildWebplayerStreamed")

static function MyBuild(){

    var levels : String[] = ["Assets/yaya.unity"];

    BuildPipeline.BuildStreamedSceneAssetBundle( levels, "yaya.unity3d", BuildTarget.WebPlayer);//BuildTarget.Andrdoid

}
</pre>或者
<pre></pre>
<pre name="code" class="java" style="background-color: rgb(255, 255, 255); "><pre name="code" class="java">@MenuItem ("Build/BuildWebplayerStreamed")

static function MyBuild(){

    BuildPipeline.BuildPlayer(["Assets/main.unity"],"VR.unity3d",BuildTarget.WebPlayer, BuildOptions.BuildAdditionalStreamedScenes);

}</pre><br>
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<pre style="margin-top:0px; margin-bottom:0px; background-color:rgb(238,238,238); font-family:Verdana,Geneva,sans-serif,宋体; padding-top:0px; padding-right:0px; padding-bottom:0px; padding-left:0px; white-space:pre-wrap; word-wrap:break-word; color:rgb(53,47,40); line-height:20px"><pre name="code" class="java">function Start () {
    // Download compressed scene. If version 5 of the file named "Streamed-Level1.unity3d" was previously downloaded and cached.
    // Then Unity will completely skip the download and load the decompressed scene directly from disk.
    //下载压缩的场景。如果名为Streamed-Level1.unity3d的文件版本为5，预先下载并缓存。
    //然后Unity将完全跳过下载并直接从磁盘加载解压的场景。
    var download = WWW.LoadFromCacheOrDownload ("http://210.30.12.16:8080/chunge/yaya.unity3d", 5);
    yield download;

    // Handle error
    if (download.error != null)
    {
        Debug.LogError(download.error);
        return;
    }

    // In order to make the scene available from LoadLevel, we have to load the asset bundle.
    // The AssetBundle class also lets you force unload all assets and file storage once it is no longer needed.
    //为了使场景LoadLevel可用，必须加载资源包
    //AssetBundle类，还可以强制卸载所有的资源和文件存储，一旦不再需要。
    var bundle = download.assetBundle;

    // Load the level we have just downloaded
    //加载刚才下载的关卡
    Application.LoadLevel ("yaya");//这里面的“yaya”是指“Assets/yaya.unity”而不是指“yaya.unity3d”
}</pre><br><br></pre>
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