Good Afternoon,

 

    I have been trying to create a launcher for about 3-5 days now using C#. I have been able to get everything done but the launching. I can authenticate the user with the new auth system and can even pull the information from the auth server. My trouble is when I start to work on "Launching the Client". I named the function "StartMinecraft" for simplicity. I literally copied the entire folder of .minecraft to my own custom folder ".AkumaMC" as a way of testing. I used a batch file to get the default launcher params when launching the client. When I launch/run this function I get no error and the client simply does not open. Does anyone know why this could be?

 

Code: 

Spoiler

        private void StartMinecraft()
        {
            string installPath = GetJavaInstallationPath();
            string filePath = System.IO.Path.Combine(installPath, "bin\\Javaw.exe");
            if (System.IO.File.Exists(filePath))
            {
                Environment.SetEnvironmentVariable("APPDATA", "C:\\AkumaMC\\");

                string userpath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
                string libpath = userpath + "\\.AkumaMC\\";
                string corepath = userpath + "\\.AkumaMC\\";
                string gamepath = userpath + "\\.AkumaMC\\";
                string assetdir = gamepath + "\\assets\\";
                string accesstoken = accessToken;

                ProcessStartInfo p = new ProcessStartInfo();
                p.FileName = filePath;
                p.CreateNoWindow = true;

                p.Arguments = @"-XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Djava.library.path=" + userpath + @"\runGame -Dminecraft.client.jar= " + userpath + @"\versions\1.12\1.12.jar -cp " + userpath + @"\libraries\net\minecraftforge\forge\1.12-14.21.1.2387\forge-1.12-14.21.1.2387.jar;" + userpath + @"\libraries\net\minecraft\launchwrapper\1.12\launchwrapper-1.12.jar;" + userpath + @"\libraries\org\ow2\asm\asm-all\5.2\asm-all-5.2.jar;" + userpath + @"\libraries\jline\jline\2.13\jline-2.13.jar;" + userpath + @"\libraries\com\typesafe\akka\akka-actor_2.11\2.3.3\akka-actor_2.11-2.3.3.jar;" + userpath + @"\libraries\com\typesafe\config\1.2.1\config-1.2.1.jar;" + userpath + @"\libraries\org\scala-lang\scala-actors-migration_2.11\1.1.0\scala-actors-migration_2.11-1.1.0.jar;" + userpath + @"\libraries\org\scala-lang\scala-compiler\2.11.1\scala-compiler-2.11.1.jar;" + userpath + @"\libraries\org\scala-lang\plugins\scala-continuations-library_2.11\1.0.2\scala-continuations-library_2.11-1.0.2.jar;" + userpath + @"\libraries\org\scala-lang\plugins\scala-continuations-plugin_2.11.1\1.0.2\scala-continuations-plugin_2.11.1-1.0.2.jar;" + userpath + @"\libraries\org\scala-lang\scala-library\2.11.1\scala-library-2.11.1.jar;" + userpath + @"\libraries\org\scala-lang\scala-parser-combinators_2.11\1.0.1\scala-parser-combinators_2.11-1.0.1.jar;" + userpath + @"\libraries\org\scala-lang\scala-reflect\2.11.1\scala-reflect-2.11.1.jar;" + userpath + @"\libraries\org\scala-lang\scala-swing_2.11\1.0.1\scala-swing_2.11-1.0.1.jar;" + userpath + @"\libraries\org\scala-lang\scala-xml_2.11\1.0.2\scala-xml_2.11-1.0.2.jar;" + userpath + @"\libraries\lzma\lzma\0.0.1\lzma-0.0.1.jar;" + userpath + @"\libraries\net\sf\jopt-simple\jopt-simple\4.6\jopt-simple-4.6.jar;" + userpath + @"\libraries\java3d\vecmath\1.5.2\vecmath-1.5.2.jar;" + userpath + @"\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;" + userpath + @"\libraries\net\minecraftforge\MercuriusUpdater\1.12\MercuriusUpdater-1.12.jar;" + userpath + @"\libraries\com\mojang\patchy\1.1\patchy-1.1.jar;" + userpath + @"\libraries\oshi-project\oshi-core\1.1\oshi-core-1.1.jar;" + userpath + @"\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar;" + userpath + @"\libraries\net\java\dev\jna\platform\3.4.0\platform-3.4.0.jar;" + userpath + @"\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;" + userpath + @"\libraries\net\sf\jopt-simple\jopt-simple\5.0.3\jopt-simple-5.0.3.jar;" + userpath + @"\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;" + userpath + @"\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;" + userpath + @"\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;" + userpath + @"\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;" + userpath + @"\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;" + userpath + @"\libraries\io\netty\netty-all\4.1.9.Final\netty-all-4.1.9.Final.jar;" + userpath + @"\libraries\com\google\guava\guava\21.0\guava-21.0.jar;" + userpath + @"\libraries\org\apache\commons\commons-lang3\3.5\commons-lang3-3.5.jar;" + userpath + @"\libraries\commons-io\commons-io\2.5\commons-io-2.5.jar;" + userpath + @"\libraries\commons-codec\commons-codec\1.10\commons-codec-1.10.jar;" + userpath + @"\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;" + userpath + @"\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;" + userpath + @"\libraries\com\google\code\gson\gson\2.8.0\gson-2.8.0.jar;" + userpath + @"\libraries\com\mojang\authlib\1.5.25\authlib-1.5.25.jar;" + userpath + @"\libraries\com\mojang\realms\1.10.17\realms-1.10.17.jar;" + userpath + @"\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar;" + userpath + @"\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar;" + userpath + @"\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;" + userpath + @"\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;" + userpath + @"\libraries\it\unimi\dsi\fastutil\7.1.0\fastutil-7.1.0.jar;" + userpath + @"\libraries\org\apache\logging\log4j\log4j-api\2.8.1\log4j-api-2.8.1.jar;" + userpath + @"\libraries\org\apache\logging\log4j\log4j-core\2.8.1\log4j-core-2.8.1.jar;" + userpath + @"\libraries\org\lwjgl\lwjgl\lwjgl\2.9.4-nightly-20150209\lwjgl-2.9.4-nightly-20150209.jar;" + userpath + @"\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.4-nightly-20150209\lwjgl_util-2.9.4-nightly-20150209.jar;" + userpath + @"\libraries\com\mojang\text2speech\1.10.3\text2speech-1.10.3.jar;" + userpath + @"\versions\1.12\1.12.jar -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M -Dlog4j.configurationFile=" + userpath + @"\assets\log_configs\client-1.12.xml net.minecraft.launchwrapper.Launch--username " + uname + " --version 1.12-forge1.12-14.21.1.2387 --gameDir " + userpath + " --assetsDir " + userpath + @"\assets --assetIndex 1.12 --uuid " + uuidPlayer + " --accessToken " + accesstoken + " --userType mojang --tweakClass net.minecraftforge.fml.common.launcher.FMLTweaker --versionType Forge";
                Process.Start(p);
                //Application.Exit();
            }
            else
            {
                MessageBox.Show("Cannot find Java installation. Please reinstall the latest version of Java and try again.", "AkumaMC Fatal Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }


        }

 

 

Pictures:

Spoiler

Batch File Output: https://i.imgur.com/febq4aI.png

Client GUI: https://i.imgur.com/9P6g5Oc.png

 

 

UPDATE: I have found that changing the default ".minecraft" folder is causing the problem. Even though i specify that the gamedir is somewhere else, it is still having issues launching the game. Does anyon know a fix to this?

 

 

Warning, there is a lot of Libs

 

All variables are set up correctly. 

 

Quick Note: the path for "-Djava.library.path=", I launched the client, found the temp folder while the game was running and copied the files from the folder it called. I plan on downloading these from my own webserver to players ".AkumaMC" folders so that I will not have to download these files. (If there is a way to get these dll files, please let me know this too <3)

 

Thanks for any help given.

Cheers.

Edited July 21, 20196 yr by xTekBlue

Creating custom launchers is not supported on this forum.

9 hours ago, DavidM said:

Creating custom launchers is not supported on this forum.

Oh sorry, do you know a good forum that does before i remove this topic?