ProjBobcat 2.0.0-CI20250519021645578-beta

ProjBobcat

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The next-generation Minecraft launcher core written in C# provides the freest, fastest, and most complete experience.

Developed and maintained by Corona Studio.

NativeAOT (ahead-of-time compilation) Support

ProjBobcat provides full support for NativeAot. Native AOT apps start up very quickly and use less memory. Users of the application can run it on a machine that doesn't have the .NET runtime installed.

Multi-Platform Support

Currently, we are working on the multi-platform support for ProjBobcat | Platform | Status | | -------- | ------------------ | | Windows | ✅ | | macOS | ✅ | | Linux | ✅ |

[Ad] An Awesome Typescript Launcher Core

Repo Link

All you need for Minecraft launcher in typescript. https://voxelum.github.io/minecraft-launcher-core-node/

Reminder before installation

• <del>Because Projbobcat uses tons of the latest language features and data structures from .NET Core and .NET 6+. As a result, you need to switch your project target to at least .NET 6 or above to use this package.</del> Projbobcat now only supports the latest LTS .NET version 8.0.
• Due to the limitation of the default number of connections in .NET, you need to manually override the number of connections to ensure that some methods in <DownloadHelper> are executed typically. You can add the following code in App.xaml.cs or the entry point of the program to complete the modification (The maximum value should not exceed 1024)

using System.Net;

ServicePointManager.DefaultConnectionLimit = 512;

Installation

There are two methods for the first step:

• Clone and copy ProjBobcat's source code to your solution folder, then add ProjBobcat's reference to your project.
• Directly install ProjBobcat via Nuget Package Manager or execute

Install-Package ProjBobcat

in Package Manager Console.

Roadmap

Instruction

Please note: ProjBobcat requires non-32-bit preferred compilation in your main project.

ProjBobcat provides 3 main components & a core to form the whole core framework.

Selective components:

Quick Startup

Java Detection

var javaList = ProjBobcat.Class.Helper.SystemInfoHelper.FindJava(); // Returns a list of all Java installations found in the registry.

Core Initialization

var core = new DefaultGameCore
{
  ClientToken = clientToken,
  RootPath = rootPath,
  VersionLocator = new DefaultVersionLocator(rootPath, clientToken)
  {
    LauncherProfileParser = new DefaultLauncherProfileParser(rootPath, clientToken),
    LauncherAccountParser = new DefaultLauncherAccountParser(rootPath, clientToken)
  },
  GameLogResolver = new DefaultGameLogResolver()
};

Game Scanning

List<VersionInfo> gameList = core.VersionLocator.GetAllGames().ToList();

Resource Completion

//Here we use mcbbs' download source, change the uri to meet your need.
var drc = new DefaultResourceCompleter
{
    ResourceInfoResolvers = new List<IResourceInfoResolver>(2)
    {
        new AssetInfoResolver
        {
            AssetIndexUriRoot = "https://download.mcbbs.net/",
            AssetUriRoot = "https://download.mcbbs.net/assets/",
            BasePath = core.RootPath,
            VersionInfo = gameList[0]
        },
        new LibraryInfoResolver
        {
            BasePath = core.RootPath,
            LibraryUriRoot = "https://download.mcbbs.net/maven/",
            VersionInfo = gameList[0]
        }
    }
};

await drc.CheckAndDownloadTaskAsync().ConfigureAwait(false);

Here are some events which you could bind to your program.

Launch Configuration

var launchSettings = new LaunchSettings
{
    FallBackGameArguments = new GameArguments // Default game arguments for all games in .minecraft/ as the fallback of specific game launch.
    {
        GcType = GcType.G1Gc, // GC type
        JavaExecutable = javaPath, //The path of Java executable
        Resolution = new ResolutionModel // Game Window's Resolution
        {
            Height = 600, // Height
            Width = 800 // Width
        },
        MinMemory = 512, // Minimal Memory
        MaxMemory = 1024 // Maximum Memory
    },
    Version = versionId, // The version ID of the game to launch, such as 1.7.10 or 1.15.2
    VersionInsulation = false // Version Isolation
    GameResourcePath = Core.RootPath, // Root path of the game resource(.minecraft/)
    GamePath = path, // Root path of the game (.minecraft/versions/)
    VersionLocator = Core.VersionLocator // Game's version locator
};

launchSettings.GameArguments = new GameArguments // (Optional) The arguments of specific game launch, the undefined settings here will be redirected to the fallback settings mentioned previously.
{
    AdvanceArguments = specificArguments , // Advanced launch arguments
    JavaExecutable = specificJavaExecutable, // JAVA's path
    Resolution = specificResolution, // The window's size
    MinMemory = specificMinMemory, // Minimum Memory
    MaxMemory = specificMaxMemory // Maximum Memory
};

Here are some events which you could bind to your program.

Define Auth Model

Offline:

launchSettings.Authenticator = new OfflineAuthenticator
{
    Username = "Username"
    LauncherAccountParser = core.VersionLocator.LauncherAccountParser // launcher_profiles.json parser
},

Online:

launchSettings.Authenticator = new YggdrasilAuthenticator
{
    LauncherAccountParser = core.VersionLocator.LauncherAccountParser
    Email = "example@example.com", // Registered E-mail address on Mojang authentication server.
    Password = "password"
};

Launch!

var result = await Core.LaunchTaskAsync(launchSettings).ConfigureAwait(true); // Returns the launch result

Stats

License

MIT. This means that you can modify or use our code for any purpose, however copyright notice and permission notice shall be included in all copies or substantial portions of your software.

Disclaimer

ProjBobcat is not affiliated with Mojang or any part of its software.

Hall of Shame

Here we'll list all programs using our code without obeying MIT License.