AssetsTools

This is an AssetBundle manipulation library for C# inspired by Unity Asset Bundle Extractor.

Features

• Supports Loading/Saving AssetBundle file with or without LZ4 compression
• Supports Loading/Storing AssetsFile from AssetBundle
• Supports Loading Object from AssetsFile as a DynamicObject
• Supports Storing Object to AssetsFile with the content of DynamicObject
• Supports .NET 4.6.1/.NET Standard 2.0

Installation

Use NuGet package. (AssetsTools by grainrigi)

Examples

Rewriting m_IsReadable flag of Texture2D

using AssetsTools;
using AssetsTools.Dynamic;

public static class Program {
	public static void Main() {
		// Load AssetBundle
		AssetBundleFile bundle = AssetBundleFile.LoadFromFile("texture.unity3d");
		
		// Load AssetsFile
		AssetsFile assets = bundle.Files[0].ToAssetsFile();
		
		// Rewrite Texture2D Objects
		foreach(var obj in assets.ObjectsWithClass(ClassIDType.Texture2D)) {
			DynamicAsset tex = obj.ToDynamicAsset();
			tex.AsDynamic().m_IsReadable = true;
			obj.LoadDynamicAsset(tex);
		}
		
		// Store the modified AssetsFile
		bundle.Files[0].LoadAssetsFile(assets);
		
		// Save the AssetBundle
		bundle.SaveToFile("texture.mod.unity3d");
	}
}

How to build

Prerequisits

• Visual Studio 2017 or dotnet
• .NET Framework 4.6.1 (for net461 build)
• .NET Core 2.0 (for netstandard2.0 build)

With VS2017

Just load the AssetsTools.sln and build the whole solution.

With dotnet

Just execute dotnet build in the root directory.

License

MIT