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| // Editor/AssetBundleBuild.cs
using UnityEditor;
using UnityEngine;
using System.Collections.Generic;
using System.IO;
using System.Linq;
public class AssetBundleBuild
{
[MenuItem("Tools/Build Asset Bundles")]
public static void BuildAllAssetBundles()
{
// 资源变体配置
var builds = new List<AssetBundleBuild>();
// 纹理变体
builds.Add(CreateVariantBuild("assets/textures/ui_bg", new[] { "hd", "sd" }));
builds.Add(CreateVariantBuild("assets/textures/characters", new[] { "hd", "sd" }));
// 模型变体（LOD）
builds.Add(CreateVariantBuild("assets/models/characters", new[] { "high", "medium", "low" }));
// 构建选项
var options = new BuildAssetBundleOptions
{
// 压缩选项
BuildOptions = BuildAssetBundleOptions.None |
BuildAssetBundleOptions.DisableWriteTypeTree |
BuildAssetBundleOptions.StrictMode |
BuildAssetBundleOptions.ChunkBasedCompression,
// 子文件压缩（降低运行时解压开销）
BuildOptions = BuildAssetBundleOptions.ChunkBasedCompression
};
// 目标平台
BuildTarget target = EditorUserBuildSettings.activeBuildTarget;
// 输出路径
string outputPath = Path.Combine("Build", "AssetBundles", target.ToString());
// 创建目录
Directory.CreateDirectory(outputPath);
// 执行构建
var manifest = BuildPipeline.BuildAssetBundles(
outputPath,
builds.ToArray(),
options,
target
);
// 生成依赖关系图
GenerateDependencyGraph(manifest);
// 计算每个包的大小
AnalyzeBundleSizes(outputPath);
Debug.Log($"Asset bundles built successfully to: {outputPath}");
}
private static AssetBundleBuild CreateVariantBuild(
string assetPath,
string[] variants
)
{
var build = new AssetBundleBuild
{
assetBundleName = assetPath,
assetNames = new[] { $"{assetPath}.prefab" }
};
// 为每个变体创建资源配置
var variantAssets = new List<string>();
foreach (var variant in variants)
{
variantAssets.Add($"{assetPath}_{variant}.prefab");
}
build.assetNames = variantAssets.ToArray();
return build;
}
private static void GenerateDependencyGraph(AssetBundleManifest manifest)
{
var graph = new Dictionary<string, string[]>();
foreach (var bundle in manifest.GetAllAssetBundles())
{
var dependencies = manifest.GetAllDependencies(bundle);
graph[bundle] = dependencies;
}
// 导出为JSON
var json = JsonUtility.ToJson(graph, true);
File.WriteAllText($"{manifest.GetAllAssetBundles()[0]}_dependencies.json", json);
}
private static void AnalyzeBundleSizes(string outputPath)
{
var files = Directory.GetFiles(outputPath, "*", SearchOption.AllDirectories)
.Where(f => !f.EndsWith(".manifest") && !f.EndsWith(".meta"));
var report = new Dictionary<string, long>();
foreach (var file in files)
{
var info = new FileInfo(file);
report[Path.GetFileName(file)] = info.Length;
}
// 生成大小报告
var sorted = report.OrderByDescending(kvp => kvp.Value);
var reportLines = sorted.Select(kvp =>
$"{kvp.Key}: {FormatBytes(kvp.Value)}"
);
File.WriteAllLines(
Path.Combine(outputPath, "size_report.txt"),
reportLines
);
}
private static string FormatBytes(long bytes)
{
string[] sizes = { "B", "KB", "MB", "GB" };
double len = bytes;
int order = 0;
while (len >= 1024 && order < sizes.Length - 1)
{
order++;
len = len / 1024;
}
return $"{len:0.##} {sizes[order]}";
}
}
|