Redcat

Unfortunately, I cannot do this. The code I've written in my first post is used to call the launcher himself. I'm using the applet mode of minecraft with this logic: [*]MinecraftLauncher Call LauncherFrame [*]LauncherFrame is used to ask user options, display news, login, blablabla [*]Once user click on login the LauncherFrame is replaced with the GameUpdater applet and the update stuff is done [*]When the update process is complete, it invoke the following method from the GameUpdater class : public Applet createApplet() throws ClassNotFoundException, InstantiationException, IllegalAccessException, SecurityException { Class appletClass = classLoader.loadClass("net.minecraft.client.MinecraftApplet"); return (Applet)appletClass.newInstance(); } And the returned Applet is handled by : Launcher.this.replace(Launcher.this.gameUpdater.createApplet()); I remembered the System.getProperty("minecraft.applet.TargetDirectory"); I've seen in the FMLRElauncher. I've set that system prop from my launcher and now FML is downloading to the right directory! System.setProperty("minecraft.applet.TargetDirectory", Util.getWorkingDirectory().toString()); But i have a new problem. When FML is calling RelaunchClassLoader.registerTransformer I have a "java.lang.ClassNotFoundException: cpw.mods.fml.common.asm.transformers.DeobfuscationTransformer". I Dont understand why, because the class is present in the Minecraft.jar file I'm not very familiar with those classloading methods used by FML and i cannot understand this function: public void registerTransformer(String transformerClassName) { try { IClassTransformer transformer = (IClassTransformer) loadClass(transformerClassName).newInstance(); transformers.add(transformer); if (transformer instanceof IClassNameTransformer && renameTransformer == null) { renameTransformer = (IClassNameTransformer) transformer; } } catch (Exception e) { FMLRelaunchLog.log(Level.SEVERE, e, "A critical problem occured registering the ASM transformer class %s", transformerClassName); } } PS : I need a custom launcher to handle the update process by myself (minecraft.jar, clients mods), to display my own news and I need a custom directory to allow players to have a separated .minecraft directory if they wanna keep their vinilla or whatever custom jar they want.

Hello guys! I'm trying to update my custom launcher from 1.4.3 to 1.5.2 and i'm having some troubles. As a lazy (and not very experimented) java coder i was using the following code in the launcher (in addition to the appropriates modification in the minecraft/net/minecraft/client/Minecraft.java file in the client): ArrayList<String> params = new ArrayList<String>(); params.add("javaw"); params.add("-Xmx1024m"); params.add("-Xms512m"); params.add("-Dsun.java2d.noddraw=true"); params.add("-Dsun.java2d.d3d=false"); params.add("-Dsun.java2d.opengl=false"); params.add("-Dsun.java2d.pmoffscreen=false"); params.add("-classpath"); params.add(pathToJar); params.add("net.minecraft.LauncherFrame"); ProcessBuilder pb = new ProcessBuilder(params); That used to work perfectly, but now, the FMLRelauncher try to download the minecraft files in the standard ".minecraft" directory. My mods, configs and binaries are created in the ".ohmygames" dir since i'm handling that by myself. I found the computeExistingClientHome method in cpw/mods/fml/relauncher/FMLRelauncher.java wich call obscures methods (for me ) such as System.getProperty("minecraft.applet.TargetDirectory"); ReflectionHelper.getPrivateValue(mcMaster, null, "minecraftDir", "an", "minecraftDir"); Method setupHome = ReflectionHelper.findMethod(mcMaster, null, new String[] { "getMinecraftDir", "getMinecraftDir", "b" }); Maybe someone already found a solution for that?