1.6.4 CoreMod - Patching Minecraft.class - Error: Unable to launch

[CreativeMD]

Hi,

i'm trying to program a new mod, which changes the way minecraft starts. It should show up a progressbar.

So this mod has to be a coremod to, but i have some problem. I get this error:

Unable to launch
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft
at net.minecraft.client.main.Main.main(SourceFile:37)

 

This happens right after this patch:

@Override
public byte[] transform(String arg0, String arg1, byte[] arg2) {
	if (arg0.equals("atv") | arg0.contains("net.minecraft.client.Minecraft")) {
		System.out.println("********* INSIDE OBFUSCATED MINECRAFTLOADER TRANSFORMER ABOUT TO PATCH: " + arg0);
		arg2 = patchClassInJar(arg0, arg2, arg0, LoaderPatchingLoader.location);
	}
	/*if (arg0.equals("aee") | arg0.contains("net.minecraft.world.chunk.storage.AnvilChunkLoader")) {
		System.out.println("********* INSIDE OBFUSCATED GENERATION TRANSFORMER ABOUT TO PATCH: " + arg0);
		arg2 = patchClassInJar(arg0, arg2, arg1, LoaderPatchingLoader.location);
	}*/
	if (arg0.equals("cpw.mods.fml.common.LoadController")) {
		System.out.println("********* INSIDE OBFUSCATED MINECRAFTLOADER TRANSFORMER ABOUT TO PATCH: " + arg0);
		arg2 = patchClassInJar(arg0, arg2, arg1, LoaderPatchingLoader.location);
	}

	return arg2;
}

public byte[] patchClassInJar(String name, byte[] bytes, String ObfName, File location)
{
	try {
		//open the jar as zip
		ZipFile zip = new ZipFile(location);
		//find the file inside the zip that is called te.class or net.minecraft.entity.monster.EntityCreeper.class
		//replacing the . to / so it would look for net/minecraft/entity/monster/EntityCreeper.class
		ZipEntry entry = zip.getEntry(name.replace('.', '/') + ".class");


		if (entry == null) {
			System.out.println(name + " not found in " + location.getName());
		} else {

			//serialize the class file into the bytes array
			InputStream zin = zip.getInputStream(entry);
			bytes = new byte[(int) entry.getSize()];
			zin.read(bytes);
			zin.close();
			System.out.println("[" + "MinecraftLoader" + "]: " + "Class " + name + " patched!");
		}
		zip.close();
	} catch (Exception e) {
		throw new RuntimeException("Error overriding " + name + " from " + location.getName(), e);
	}

	//return the new bytes
	return bytes;
}

Yes, i my file contains the atv.class file.

Download this mod:

https://www.dropbox.com/s/uhtzr9oql436hnh/MinecraftLoader%200.1%20mc1.6.4.jar

 

This is not the first time for me working with this, but i don't know what i'm doing wrong, because it does obviously patch that file.

[GotoLink]

I don't think you need to replace the entire Minecraft class to do this.

Learning to use ASM would help you immensely.

 

if (arg0.equals("cpw.mods.fml.common.LoadController")) {
		System.out.println("********* INSIDE OBFUSCATED MINECRAFTLOADER TRANSFORMER ABOUT TO PATCH: " + arg0);

Why patching this ? You didn't realize this is a FML class ?

[dude22072]

I dont know much about core mods but the crash says

Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/Minecraft

 

so maybe change

if (arg0.equals("atv") | arg0.contains("net.minecraft.client.Minecraft")) {

to just

if (arg0.equals("atv")) {

 

because due to obfustication "net.minecraft.client.Minecraft" wouldn't be called this?

[CreativeMD]

I don't think you need to replace the entire Minecraft class to do this.

Learning to use ASM would help you immensely.

 

if (arg0.equals("cpw.mods.fml.common.LoadController")) {
		System.out.println("********* INSIDE OBFUSCATED MINECRAFTLOADER TRANSFORMER ABOUT TO PATCH: " + arg0);

Why patching this ? You didn't realize this is a FML class ?

You are totally right, but i don't know how. I only have to overwrite one method startGame()

private void startGame() throws LWJGLException
    {
        this.gameSettings = new GameSettings(this, this.mcDataDir);

        if (this.gameSettings.overrideHeight > 0 && this.gameSettings.overrideWidth > 0)
        {
            this.displayWidth = this.gameSettings.overrideWidth;
            this.displayHeight = this.gameSettings.overrideHeight;
        }

        if (this.fullscreen)
        {
            Display.setFullscreen(true);
            this.displayWidth = Display.getDisplayMode().getWidth();
            this.displayHeight = Display.getDisplayMode().getHeight();

            if (this.displayWidth <= 0)
            {
                this.displayWidth = 1;
            }

            if (this.displayHeight <= 0)
            {
                this.displayHeight = 1;
            }
        }
        else
        {
            Display.setDisplayMode(new DisplayMode(this.displayWidth, this.displayHeight));
        }

        Display.setResizable(true);
        Display.setTitle("Minecraft 1.6.4");
        this.getLogAgent().logInfo("LWJGL Version: " + Sys.getVersion());

        if (Util.getOSType() != EnumOS.MACOS)
        {
            try
            {
                Display.setIcon(new ByteBuffer[] {this.readImage(new File(this.fileAssets, "/icons/icon_16x16.png")), this.readImage(new File(this.fileAssets, "/icons/icon_32x32.png"))});
            }
            catch (IOException ioexception)
            {
                ioexception.printStackTrace();
            }
        }

        try
        {
            ForgeHooksClient.createDisplay();
        }
        catch (LWJGLException lwjglexception)
        {
            lwjglexception.printStackTrace();

            try
            {
                Thread.sleep(1000L);
            }
            catch (InterruptedException interruptedexception)
            {
                ;
            }

            if (this.fullscreen)
            {
                this.updateDisplayMode();
            }

            Display.create();
        }

        OpenGlHelper.initializeTextures();
        this.guiAchievement = new GuiAchievement(this);
        this.metadataSerializer_.registerMetadataSectionType(new TextureMetadataSectionSerializer(), TextureMetadataSection.class);
        this.metadataSerializer_.registerMetadataSectionType(new FontMetadataSectionSerializer(), FontMetadataSection.class);
        this.metadataSerializer_.registerMetadataSectionType(new AnimationMetadataSectionSerializer(), AnimationMetadataSection.class);
        this.metadataSerializer_.registerMetadataSectionType(new PackMetadataSectionSerializer(), PackMetadataSection.class);
        this.metadataSerializer_.registerMetadataSectionType(new LanguageMetadataSectionSerializer(), LanguageMetadataSection.class);
        this.saveLoader = new AnvilSaveConverter(new File(this.mcDataDir, "saves"));
        this.mcResourcePackRepository = new ResourcePackRepository(this.fileResourcepacks, this.mcDefaultResourcePack, this.metadataSerializer_, this.gameSettings);
        this.mcResourceManager = new SimpleReloadableResourceManager(this.metadataSerializer_);
        this.mcLanguageManager = new LanguageManager(this.metadataSerializer_, this.gameSettings.language);
        this.mcResourceManager.registerReloadListener(this.mcLanguageManager);
        this.refreshResources();
        this.renderEngine = new TextureManager(this.mcResourceManager);
        this.mcResourceManager.registerReloadListener(this.renderEngine);
        this.sndManager = new SoundManager(this.mcResourceManager, this.gameSettings, this.fileAssets);
        this.mcResourceManager.registerReloadListener(this.sndManager);
        this.fontRenderer = new FontRenderer(this.gameSettings, new ResourceLocation("textures/font/ascii.png"), this.renderEngine, false);
        if (this.gameSettings.language != null)
        {
            this.fontRenderer.setUnicodeFlag(this.mcLanguageManager.isCurrentLocaleUnicode());
            this.fontRenderer.setBidiFlag(this.mcLanguageManager.isCurrentLanguageBidirectional());
        }
        this.standardGalacticFontRenderer = new FontRenderer(this.gameSettings, new ResourceLocation("textures/font/ascii_sga.png"), this.renderEngine, false);
        this.mcResourceManager.registerReloadListener(this.fontRenderer);
        this.mcResourceManager.registerReloadListener(this.standardGalacticFontRenderer);
        LoaderDummyContainer.loadScreen("Start loading mods...", 0);
        
        FMLClientHandler.instance().beginMinecraftLoading(this, this.defaultResourcePacks, this.mcResourceManager);

        
        LoaderDummyContainer.loadScreen("Start loading recources...", 200);
        this.mcResourceManager.registerReloadListener(new GrassColorReloadListener());
        this.mcResourceManager.registerReloadListener(new FoliageColorReloadListener());
        RenderManager.instance.itemRenderer = new ItemRenderer(this);
        this.entityRenderer = new EntityRenderer(this);
        this.statFileWriter = new StatFileWriter(this.session, this.mcDataDir);
        AchievementList.openInventory.setStatStringFormatter(new StatStringFormatKeyInv(this));
        this.mouseHelper = new MouseHelper();
        this.checkGLError("Pre startup");
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glClearDepth(1.0D);
        GL11.glEnable(GL11.GL_DEPTH_TEST);
        GL11.glDepthFunc(GL11.GL_LEQUAL);
        GL11.glEnable(GL11.GL_ALPHA_TEST);
        GL11.glAlphaFunc(GL11.GL_GREATER, 0.1F);
        GL11.glCullFace(GL11.GL_BACK);
        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        this.checkGLError("Startup");
        this.renderGlobal = new RenderGlobal(this);
        this.renderEngine.loadTextureMap(TextureMap.locationBlocksTexture, new TextureMap(0, "textures/blocks"));
        this.renderEngine.loadTextureMap(TextureMap.locationItemsTexture, new TextureMap(1, "textures/items"));
        GL11.glViewport(0, 0, this.displayWidth, this.displayHeight);
        this.effectRenderer = new EffectRenderer(this.theWorld, this.renderEngine);
        FMLClientHandler.instance().finishMinecraftLoading();
        this.checkGLError("Post startup");
        this.ingameGUI = new GuiIngameForge(this);

        if (this.serverName != null)
        {
            this.displayGuiScreen(new GuiConnecting(new GuiMainMenu(), this, this.serverName, this.serverPort));
        }
        else
        {
            this.displayGuiScreen(new GuiMainMenu());
        }

        this.loadingScreen = new LoadingScreenRenderer(this);

        if (this.gameSettings.fullScreen && !this.fullscreen)
        {
            this.toggleFullscreen();
        }
        FMLClientHandler.instance().onInitializationComplete();
        LoaderDummyContainer.loadScreen("Complete loading mods...", 700);
    }

Can you show me how to do this?

 

@dude22072 I'm sorry but this

 | arg0.contains("net.minecraft.client.Minecraft")

has no influence on that.

[CreativeMD]

Nobody?