.unity3d格式的导出与加载

1、单一文件创建unity3d

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

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

    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);  

                }  

            }  

        }  

    }  

}  

说明：string filePath = fileName.Replace("\\","/");  把“\”转化成“/”。把以上代码的脚本放到一个文件夹里面（须放在Assets\Editor目录下面），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、单一文件unity3d格式的加载

function Start () {  

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

    yield www;  

    Instantiate(www.assetBundle.mainAsset);  

}  

function Start ()  

{   

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

    yield www;  

    if (www.error != null)  

    {  

        Debug.Log (www.error);  

        return;  

    }  

   Instantiate(www.assetBundle.mainAsset);  

}

3、场景转化成unity3D格式

@MenuItem ("Build/BuildScene")
static function MyBuild(){  

    var levels : String[] = ["Assets/main.unity"];  //main为场景名称

    BuildPipeline.BuildStreamedSceneAssetBundle( levels, "test.unity3d", BuildTarget.WebPlayer);//BuildTarget.Andrdoid   “test.unity3d”为生成的文件名称

}
//或者
@MenuItem ("Build/BuildScene")  

static function MyBuild(){  

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

}

说明：默认生成的文件是在工程根目录下面，同样此文件得放在Assets\Editor目录下面；BuildTarget，转化成不同的平台，这个根据实际需要设置即可。

4、unity3D场景文件加载

function Start () {
    // Download compressed scene. If version 5 of the file named "test.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test.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 ("file:///"+Application.dataPath + "/test.unity3d", 5);
//    var download = WWW.LoadFromCacheOrDownload ("http://myWebSite.com/test.unity3d", 5);

print(Application.dataPath + "/test.unity3d");
    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
    //加载刚才下载的场景
    Application.LoadLevel ("main");
}