61 lines
3.7 KiB
Markdown
61 lines
3.7 KiB
Markdown
ScriptCraft
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A Minecraft mod that lets you build using Javascript
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Description
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===========
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The ScriptCraft mod lets you enter javascript commands at the in-game prompt.
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To bring up the in-game prompt press the `/` key then type `js ` followed by any javascript statement.
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E.g. `/js 1+1` will print 2.
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ScriptCraft uses Rhino (The built-in javascript interpreter that comes with current versions of Java).
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Unfortunately, due to the need to reobfuscate the Minecraft codebase , it is not possible to expose the entire
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Minecraft Java API via Javascript as this goes against the current terms of use for MCP (Minecraft is not open source).
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As of Dec 27 2012, the ScriptCraft mod includes just a few built-in objects and functions to make building easier.
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* help() - Brings up a short help message.
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* print(message) - prints a message on the command screen. e.g. `/js print(1+3);`
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* load('path-to-script.js') - lets you load and execute any javascript source file. Calling load() with no parameters will bring up a File Chooser dialog. (In the context of script files, the $SCRIPT js variable will refer to the current script filename and $SCRIPTPATH refers to the directory in which the current script resides.)
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* player - the Player object - unfortunately this isn't currently useful as its properties are obfuscated.
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* world - The minecraft world object - again - all properties are currently obfuscated.
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* getMousePos() - A function which returns the current position of the cross-hairs (if a block is selected)
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* getPlayerPos() - A function which returns the current position of the player.
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* putBlock(x,y,z,blockId,metaData) - A function which lets you place a block anywhere
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* putSign(String[] texts, x,y,z,blockId, metaData) - A function which lets you place a sign.
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The above primitives can be used to create buildings which would otherwise be time-consuming to create manually.
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It is highly recommended using the attached drone.js javascript module which provides a fluent API for building.
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The Javascript `Drone` class provides a much richer API which can be used to construct buildings. See the attached
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`cottage.js` file for an example of how to load and use the `drone.js` module.
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Prerequisites
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=============
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You'll need to install the Minecraft Coder Pack and be comfortable installing a Minecraft Mod.
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You can get the Minecraft Coder Pack here...
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http://mcp.ocean-labs.de/index.php/Main_Page
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... You will need to follow MCP's instructions to decompile your minecraft.jar file, then apply the ServerCommandManager.patch file to the $MCP/src/minecraft/net/minecraft/src/ServerCommandManager.java file.
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Then copy the CommandScript.java file to $MCP/src/minecraft/net/minecraft/src/ directory (where $MCP is the location where you've installed Minecraft Coder pack).
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Then run ./reobfuscate.sh and follow MCP's instructions for copying the obfuscated files and rebuilding the minecraft.jar file.
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Getting Started
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===============
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Once you've installed the mod, launch Minecraft and type `/js load()` and load the `cottage.js` file. Once the cottage.js file is loaded you can create a new cottage by typing `/js cottage()`.
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Take a look over the cottage.js file to see how the Drone module can be used to easily create buildings. You can even create a whole row of cottages using the following in-game command...
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/js load("./cottage"); // path may vary on your machine
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/js d = new Drone(); for (i=0; i < 20;i++){ cottage(d).right(10);}
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The above code loads the example blueprint for a cottage and uses a `for` loop to create multiple cottages
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from the blueprint. Keep a Minecraft Block reference handy - there's one here ...
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http://www.minecraftinfo.com/idlist.htm
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Griefing
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========
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Don't do it.
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