.unity3d格式的导出与加载

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

@MenuItem ("Build/BuildWebplayerStreamed")

static function MyBuild(){

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

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

}
或者

@MenuItem ("Build/BuildWebplayerStreamed")

static function MyBuild(){

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

}




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”
}