calc-mcp

Okay, here's a simplified explanation of how you could create a simple Minecraft server mod (using MCP - Minecraft Coder Pack) that adds a calculator tool. I'll outline the key steps and provide conceptual code snippets. Keep in mind that this is a simplified example, and a fully functional mod would require more detailed code and setup. **Conceptual Overview** The basic idea is to: 1. **Set up your MCP environment:** This involves downloading MCP, deobfuscating the Minecraft code, and setting up your development environment (usually Eclipse or IntelliJ IDEA). 2. **Create a new item (the calculator):** You'll define a new item class that represents your calculator. 3. **Register the item:** You need to register your new item with Minecraft so it can be used in the game. 4. **Add functionality to the item:** When the player right-clicks with the calculator, you'll trigger the calculator logic. This might involve opening a GUI (graphical user interface) where the player can enter numbers and operations. 5. **Handle the GUI (if needed):** If you're using a GUI, you'll need to create the GUI class and handle user input (button clicks, text input, etc.). 6. **Perform calculations:** Implement the actual calculator logic (addition, subtraction, multiplication, division, etc.). 7. **Display the result:** Show the result of the calculation to the player (e.g., in the GUI, in chat, or as a floating text entity). **Simplified Code Snippets (Conceptual)** ```java // Example Item Class (CalculatorItem.java) package com.example.calculator; import net.minecraft.item.Item; import net.minecraft.item.ItemStack; import net.minecraft.entity.player.EntityPlayer; import net.minecraft.world.World; import net.minecraft.util.ActionResult; import net.minecraft.util.EnumHand; import net.minecraft.util.text.TextComponentString; public class CalculatorItem extends Item { public CalculatorItem() { super(); this.setRegistryName("calculator"); // Important: Set the registry name this.setUnlocalizedName("calculator"); // Set the unlocalized name (for localization) } @Override public ActionResult<ItemStack> onItemRightClick(World worldIn, EntityPlayer playerIn, EnumHand handIn) { ItemStack itemstack = playerIn.getHeldItem(handIn); if (!worldIn.isRemote) { // Server-side only // Simple example: Just send a message to the player playerIn.sendMessage(new TextComponentString("Calculator Activated!")); // In a real mod, you would: // 1. Open a GUI (if you have one) // 2. Start the calculation process } return ActionResult.newResult(net.minecraft.util.EnumActionResult.SUCCESS, itemstack); } } // Example Mod Class (CalculatorMod.java) package com.example.calculator; import net.minecraftforge.fml.common.Mod; import net.minecraftforge.fml.common.Mod.EventHandler; import net.minecraftforge.fml.common.event.FMLInitializationEvent; import net.minecraftforge.fml.common.event.FMLPreInitializationEvent; import net.minecraftforge.fml.common.registry.GameRegistry; import net.minecraft.item.Item; import net.minecraftforge.event.RegistryEvent; import net.minecraftforge.fml.common.eventhandler.SubscribeEvent; import net.minecraftforge.fml.common.SidedProxy; @Mod(modid = CalculatorMod.MODID, version = CalculatorMod.VERSION, name = CalculatorMod.NAME) public class CalculatorMod { public static final String MODID = "calculator"; public static final String VERSION = "1.0"; public static final String NAME = "Calculator Mod"; @SidedProxy(clientSide = "com.example.calculator.ClientProxy", serverSide = "com.example.calculator.CommonProxy") public static CommonProxy proxy; public static Item calculator; @EventHandler public void preInit(FMLPreInitializationEvent event) { // Initialize your item here (but don't register it yet) calculator = new CalculatorItem(); } @EventHandler public void init(FMLInitializationEvent event) { proxy.registerItemRenderer(calculator, 0, "calculator"); } @Mod.EventBusSubscriber public static class RegistrationHandler { @SubscribeEvent public static void registerItems(RegistryEvent.Register<Item> event) { event.getRegistry().register(calculator); } } } // CommonProxy.java package com.example.calculator; import net.minecraft.item.Item; public class CommonProxy { public void registerItemRenderer(Item item, int meta, String id) { } } // ClientProxy.java package com.example.calculator; import net.minecraft.client.renderer.block.model.ModelResourceLocation; import net.minecraft.item.Item; import net.minecraftforge.client.model.ModelLoader; import net.minecraftforge.fml.relauncher.Side; import net.minecraftforge.fml.relauncher.SideOnly; @SideOnly(Side.CLIENT) public class ClientProxy extends CommonProxy { @Override public void registerItemRenderer(Item item, int meta, String id) { ModelLoader.setCustomModelResourceLocation(item, meta, new ModelResourceLocation(CalculatorMod.MODID + ":" + id, "inventory")); } } ``` **Explanation of the Code Snippets:** * **`CalculatorItem.java`:** * This defines the `CalculatorItem` class, which extends `Item`. * `onItemRightClick()` is the method that's called when the player right-clicks with the item. This is where you'd put your calculator logic. In this simplified example, it just sends a message to the player. * `setRegistryName()` and `setUnlocalizedName()` are *crucial*. The registry name is how Minecraft identifies the item internally. The unlocalized name is used for localization (making the item name appear correctly in different languages). * **`CalculatorMod.java`:** * This is the main mod class. * `@Mod` annotation: Defines the mod's ID, version, and name. * `@EventHandler preInit`: This method is called before the game loads. You initialize your item here. * `@EventHandler init`: This method is called during game initialization. This is where you register the item renderer. * `@Mod.EventBusSubscriber`: This is used to register the item. * `@SubscribeEvent registerItems`: This method registers the item with the game. * **`CommonProxy.java` and `ClientProxy.java`:** * These are used for handling client-side and server-side code separately. The `ClientProxy` is responsible for registering the item's model (how it looks in the inventory and in the world). **Steps to Implement (More Detailed):** 1. **MCP Setup:** * Download the correct version of MCP for your target Minecraft version. * Extract MCP to a directory. * Run `decompile.bat` (or `decompile.sh` on Linux/macOS) to deobfuscate the Minecraft code. This will take a while. * Run `recompile.bat` (or `recompile.sh`). * Run `reobfuscate.bat` (or `reobfuscate.sh`). * Run `createMcpToEclipse.bat` (or the equivalent for IntelliJ IDEA). 2. **Create the Project:** * In Eclipse or IntelliJ IDEA, create a new Java project. * Import the MCP source code into your project. 3. **Create the Item Class:** * Create the `CalculatorItem.java` file (as shown above). 4. **Create the Mod Class:** * Create the `CalculatorMod.java` file (as shown above). 5. **Create the Proxy Classes:** * Create the `CommonProxy.java` and `ClientProxy.java` files (as shown above). 6. **Register the Item:** * Make sure the `@Mod.EventBusSubscriber` and `@SubscribeEvent` annotations are correctly set up in your `CalculatorMod.java` file to register the item. 7. **Item Model (Important):** * Create a JSON file in `src/main/resources/assets/calculator/models/item/calculator.json` (replace "calculator" with your mod ID if different). This file defines how the item looks. A simple example: ```json { "parent": "item/generated", "textures": { "layer0": "calculator:items/calculator" // Replace with your texture path } } ``` * You'll also need a texture file (a `.png` image) in `src/main/resources/assets/calculator/textures/items/calculator.png`. Create a simple image for your calculator. 8. **GUI (If you want one):** * Create a GUI class that extends `net.minecraft.client.gui.GuiScreen`. * Override the `drawScreen()` method to draw the GUI elements (buttons, text fields, etc.). * Override the `mouseClicked()` method to handle button clicks. * In your `CalculatorItem.onItemRightClick()`, open the GUI using `playerIn.openGui(instance, guiID, worldIn, x, y, z);` You'll need to implement `IGuiHandler` in your main mod class and create a `GuiFactory` to handle the GUI opening. 9. **Calculator Logic:** * Implement the calculator logic (addition, subtraction, etc.) in a separate class or within the GUI class. 10. **Build and Test:** * Build your mod. * Copy the resulting `.jar` file to your Minecraft `mods` folder. * Run Minecraft and test your mod. **Important Considerations:** * **Minecraft Forge:** You'll need to use Minecraft Forge to load your mod. Make sure you have the correct Forge version for your Minecraft version. * **GUI Complexity:** Creating a good GUI is the most complex part of this. Consider using a library like Minecraft's built-in GUI system or a third-party GUI library. * **Error Handling:** Add error handling to your calculator logic to prevent crashes (e.g., division by zero). * **Localization:** Use localization files to make your mod's text translatable. * **Permissions:** If you want to restrict the use of the calculator, you can add permission checks. * **Networking:** If you want to perform calculations on the server-side (e.g., for security), you'll need to use Minecraft's networking system to send data between the client and the server. **Chinese Translation of Key Terms:** * **Minecraft Server Mod:** Minecraft服务器模组 (Minecraft Fúwùqì Mózǔ) * **Calculator Tool:** 计算器工具 (Jìsuànqì Gōngjù) * **MCP (Minecraft Coder Pack):** Minecraft代码包 (Minecraft Dàimǎ Bāo) * **Item:** 物品 (Wùpǐn) * **GUI (Graphical User Interface):** 图形用户界面 (Túxíng Yònghù Jièmiàn) * **Register:** 注册 (Zhùcè) * **Deobfuscate:** 反混淆 (Fǎn Hùnyáo) * **Reobfuscate:** 重新混淆 (Chóngxīn Hùnyáo) * **Forge:** Forge (usually kept in English) * **Texture:** 纹理 (Wénlǐ) * **Model:** 模型 (Móxíng) * **Client-side:** 客户端 (Kèhùduān) * **Server-side:** 服务器端 (Fúwùqìduān) This is a complex project, but hopefully, this detailed explanation and the code snippets give you a good starting point. Good luck!