# ScriptCraft API Reference Walter Higgins [walter.higgins@gmail.com][email] [email]: mailto:walter.higgins@gmail.com?subject=ScriptCraft_API_Reference ## Module Loading At server startup the ScriptCraft Java plugin is loaded and once loaded the Java plugin will in turn begin loading all of the javascript (.js) files it finds in the js-plugins directory (in the current working directory). If this is the first time the ScriptCraft plugin is loaded, then the js-plugins directory will not yet exist, it will be created and all of the bundled javascript files will be unzipped into it from a bundled resource within the Java plugin. The very first javascript file to load will always be js-plugins/core/_scriptcraft.js. Then all other javascript files are loaded except for filenames which begin with `_` (underscore), such files are considered to be private modules and will not be automatically loaded at startup. ### Directory structure The js-plugins directory is loosely organised into subdirectories - one for each module. Each subdirectory in turn can contain one or more javascript files. Within each directory, a javascript file with the same filename as the directory will always be loaded before all other files in the same directory. So for example, drone/drone.js will always load before any other files in the drone/ directory. Similarly utils/utils.js will always load before any other files in the utils/ directory. ### Directories As of February 10 2013, the js-plugins directory has the following sub-directories... * core - Contains javascript files containing Core functionality crucial to ScriptCraft and modules which use it. * drone - Contains the drone module and drone extensions. Drone was the first scriptcraft module. * ext - Contains external 3rd party javascript libraries (e.g. json2.js - the JSON lib) * mini-games - Contains mini-games * arrows - The arrows module * signs - The signs module * chat - The chat plugin/module * alias - The alias plugin/module ## Core Module This module defines commonly used functions by all plugins... * load (filename,warnOnFileNotFound) - loads and evaluates a javascript file, returning the evaluated object. * save (object, filename) - saves an object to a file. * plugin (name, interface, isPersistent) - defines a new plugin. If isPersistent is true then the plugin doesn't have to worry about loading and saving state - that will be done by the framework. Just make sure that anything you want to save (and restore) is in the plugin's 'store' property - this will be created automatically if not already defined. (its type is object {} ) . More on plugins below. * ready (function) - specifies code to be executed only when all the plugins have loaded. * command (name, function) - defines a command that can be used by non-operators. The `command` function provides a way for plugin developers to provide new commands for use by players. ### load() function The load() function is used by ScriptCraft at startup to load all of the javascript modules and data. You normally wouldn't need to call this function directly. If you put a javascript file anywhere in the craftbukkit/js-plugins directory tree it will be loaded automatically when craftbukkit starts up. The exception is files whose name begins with an underscore `_` character. These files will not be automatically loaded at startup as they are assumed to be files managed / loaded by plugins. #### Parameters * filename - The name of the file to load. * warnOnFileNotFound (optional - default: false) - warn if the file was not found. #### Return load() will return the result of the last statement evaluated in the file. #### Example load(__folder + "myFile.js"); // loads a javascript file and evaluates it. var myData = load("myData.json"); // loads a javascript file and evaluates it - eval'd contents are returned. myData.json contents... __data = { players: { walterh: { h: ["jsp home {1}"], sunny:["time set 0", "weather clear"] } } } ### save() function The save() function saves an in-memory javascript object to a specified file. Under the hood, save() uses JSON (specifically json2.js) to save the object. Again, there will usually be no need to call this function directly as all javascript plugins' state are saved automatically if they are declared using the `plugin()` function. Any in-memory object saved using the `save()` function can later be restored using the `load()` function. #### Parameters * objectToSave : The object you want to save. * filename : The name of the file you want to save it to. #### Example var myObject = { name: 'John Doe', aliases: ['John Ray', 'John Mee'], date_of_birth: '1982/01/31' }; save(myObject, 'johndoe.json'); johndoe.json contents... var __data = { "name": "John Doe", "aliases": ["John Ray", "John Mee"], "date_of_birth": "1982/01/31" }; ### plugin() function The `plugin()` function should be used to declare a javascript module whose state you want to have managed by ScriptCraft - that is - a Module whose state will be loaded at start up and saved at shut down. A plugin is just a regular javascript object whose state is managed by ScriptCraft. The only member of the plugin which whose persistence is managed by Scriptcraft is `state` - this special member will be automatically saved at shutdown and loaded at startup by ScriptCraft. This makes it easier to write plugins which need to persist data. #### Parameters * pluginName (String) : The name of the plugin - this becomes a global variable. * pluginDefinition (Object) : The various functions and members of the plugin object. * isPersistent (boolean - optional) : Specifies whether or not the plugin/object state should be loaded and saved by ScriptCraft. #### Example See chat/color.js for an example of a simple plugin - one which lets players choose a default chat color. See also [Anatomy of a ScriptCraft Plugin][anatomy]. [anatomy]: http://walterhiggins.net/blog/ScriptCraft-1-Month-later ### command() function The `command()` function is used to expose javascript functions for use by non-operators (regular players). Only operators should be allowed use raw javascript using the `/js ` command because it is too powerful for use by regular players and can be easily abused. However, the `/jsp ` command lets you (the operator / server administrator / plugin author) safely expose javascript functions for use by players. #### Parameters * commandName : The name to give your command - the command will be invoked like this by players `/jsp commandName` * commandFunction: The javascript function which will be invoked when the command is invoked by a player. * options (Array - optional) : An array of command options/parameters which the player can supply (It's useful to supply an array so that Tab-Completion works for the `/jsp ` commands. * intercepts (boolean - optional) : Indicates whether this command can intercept Tab-Completion of the `/jsp ` command - advanced usage - see alias/alias.js for example. #### Example See chat/colors.js or alias/alias.js or homes/homes.js for examples of how to use the `command()` function. ### ready() function The `ready()` function provides a way for plugins to do additional setup once all of the other plugins/modules have loaded. For example, event listener registration can only be done after the events/events.js module has loaded. A plugin author could load the file explicilty like this... load(__folder + "../events/events.js"); // event listener registration goes here ... or better still, just do event regristration using the `ready()` handler knowing that by the time the `ready()` callback is invoked, all of the scriptcraft modules have been loaded... ready(function(){ // event listener registration goes here // code that depends on other plugins/modules also goes here }); The execution of the function object passed to the `ready()` function is *deferred* until all of the plugins/modules have loaded. That way you are guaranteed that when the function is invoked, all of the plugins/modules have been loaded and evaluated and are ready to use. Core Module - Special Variables =============================== There are a couple of special javascript variables available in ScriptCraft... * __folder - The current working directory - this variable is only to be used within the main body of a .js file. * __plugin - The ScriptCraft JavaPlugin object. * server - The Minecraft Server object. * self - the current player. (Note - this value should not be used in multi-threaded scripts - it's not thread-safe) ## Miscellaneous Core Functions ### setTimeout() function This function mimics the setTimeout() function used in browser-based javascript. However, the function will only accept a function reference, not a string of javascript code. Where setTimeout() in the browser returns a numeric value which can be subsequently passed to clearTimeout(), This implementation returns a [BukkitTask][btdoc] object which can be subsequently passed to ScriptCraft's own clearTimeout() implementation. If Node.js supports setTimeout() then it's probably good for ScriptCraft to support it too. [btdoc]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/BukkitTask.html #### Example // // start a storm in 5 seconds // setTimeout( function() { var world = server.worlds.get(0); world.setStorm(true); }, 5000); ### clearTimeout() function A scriptcraft implementation of clearTimeout(). ### setInterval() function This function mimics the setInterval() function used in browser-based javascript. However, the function will only accept a function reference, not a string of javascript code. Where setInterval() in the browser returns a numeric value which can be subsequently passed to clearInterval(), This implementation returns a [BukkitTask][btdoc] object which can be subsequently passed to ScriptCraft's own clearInterval() implementation. If Node.js supports setInterval() then it's probably good for ScriptCraft to support it too. [btdoc]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/BukkitTask.html ### clearInterval() function A scriptcraft implementation of clearInterval(). ### refresh() function The refresh() function will ... 1. Disable the ScriptCraft plugin. 2. Unload all event listeners associated with the ScriptCraft plugin. 3. Enable the ScriptCraft plugin. ... refresh() can be used during development to reload only scriptcraft javascript files. See [issue #69][issue69] for more information. [issue69]: https://github.com/walterhiggins/ScriptCraft/issues/69 ## Require - Node.js-style module loading in ScriptCraft #### (Experimental as of 2013-12-21) Node.js is a server-side javascript environment with an excellent module loading system based on CommonJS. Modules in Node.js are really simple. Each module is in its own javascript file and all variables and functions within the file are private to that file/module only. There is a very concise explanation of CommonJS modules at... [http://wiki.commonjs.org/wiki/Modules/1.1.1.][cjsmodules] If you want to export a variable or function you use the module.export property. For example imagine you have 3 files program.js, inc.js and math.js ... ### math.js exports.add = function(a,b){ return a + b; } ### inc.js var math = require('./math'); exports.increment = function(n){ return math.add(n, 1); } ### program.js var inc = require('./inc').increment; var a = 7; a = inc(a); print(a); You can see from the above sample code that programs can use modules and modules themeselves can use other modules. Modules have full control over what functions and properties they want to provide to others. ## Important Although ScriptCraft now supports Node.js style modules, it does not support node modules. Node.js and Rhino are two very different Javascript environments. ScriptCraft uses Rhino Javascript, not Node.js. Right now, the base directory is for relative modules is 'js-plugins'. Modules can be loaded using relative or absolute paths. Per the CommonJS module specification, the '.js' suffix is optional. [cjsmodules]: http://wiki.commonjs.org/wiki/Modules/1.1.1. Drone Module ============ The Drone is a convenience class for building. It can be used for... 1. Building 2. Copying and Pasting It uses a fluent interface which means all of the Drone's methods return `this` and can be chained together like so... var theDrone = new Drone(); theDrone.up().left().box(blocks.oak).down().fwd(3).cylinder0(blocks.lava,8); TLDNR; (Just read this if you're impatient) =========================================== At the in-game command prompt type... /js box( blocks.oak ) ... creates a single wooden block at the cross-hairs or player location /js box( blocks.oak ).right(2).box( blocks.wool.black, 4, 9, 1) ... creates a single wooden block and a 2001 black obelisk that is 4 wide x 9 tall x 1 long in size. If you want to see what else ScriptCraft's Drone can do, read on... Constructing a Drone Object =========================== Drones can be created in any of the following ways... 1. Calling any one of the methods listed below will return a Drone object. For example... var d = box( blocks.oak ) ... creates a 1x1x1 wooden block at the cross-hairs or player's location and returns a Drone object. This might look odd (if you're familiar with Java's Object-dot-method syntax) but all of the Drone class's methods are also global functions that return new Drone objects. This is short-hand for creating drones and is useful for playing around with Drones at the in-game command prompt. It's shorter than typing ... var d = new Drone().box( blocks.oak ) ... All of the Drone's methods return `this` (self) so you can chain operations together like this... var d = box( blocks.oak ) .up() .box( blocks.oak ,3,1,3) .down() .fwd(2) .box( blocks.oak ) .turn() .fwd(2) .box( blocks.oak ) .turn() .fwd(2) .box( blocks.oak ); 2. Using the following form... d = new Drone() ...will create a new Drone. If the cross-hairs are pointing at a block at the time then, that block's location becomes the drone's starting point. If the cross-hairs are _not_ pointing at a block, then the drone's starting location will be 2 blocks directly in front of the player. TIP: Building always happens right and front of the drone's position... Plan View: ^ | | D----> For convenience you can use a _corner stone_ to begin building. The corner stone should be located just above ground level. If the cross-hair is point at or into ground level when you create a new Drone(), then building begins at that point. You can get around this by pointing at a 'corner stone' just above ground level or alternatively use the following statement... d = new Drone().up(); ... which will move the drone up one block as soon as it's created. ![corner stone](img/cornerstone1.png) 3. Or by using the following form... d = new Drone(x,y,z,direction,world); This will create a new Drone at the location you specified using x, y, z In minecraft, the X axis runs west to east and the Z axis runs north to south. The direction parameter says what direction you want the drone to face: 0 = east, 1 = south, 2 = west, 3 = north. If the direction parameter is omitted, the player's direction is used instead. Both the `direction` and `world` parameters are optional. 4. Create a new Drone based on a Bukkit Location object... d = new Drone(location); This is useful when you want to create a drone at a given `org.bukkit.Location` . The `Location` class is used throughout the bukkit API. For example, if you want to create a drone when a block is broken at the block's location you would do so like this... events.on('block.BlockBreakEvent',function(listener,event){ var location = event.block.location; var drone = new Drone(location); // do more stuff with the drone here... }); Parameters ---------- * location (optional) : *NB* If an `org.bukkit.Location` object is provided as a parameter, then it should be the only parameter. * x (optional) : The x coordinate of the Drone * y (optional) : The y coordinate of the Drone * z (optional) : The z coordinate of the Drone * direction (optional) : The direction in which the Drone is facing. Possible values are 0 (east), 1 (south), 2 (west) or 3 (north) * world (optional) : The world in which the drone is created. Drone.box() method ================== the box() method is a convenience method for building things. (For the more performance-oriented method - see cuboid) parameters ---------- * b - the block id - e.g. 6 for an oak sapling or '6:2' for a birch sapling. Alternatively you can use any one of the `blocks` values e.g. `blocks.sapling.birch` * w (optional - default 1) - the width of the structure * h (optional - default 1) - the height of the structure * d (optional - default 1) - the depth of the structure - NB this is not how deep underground the structure lies - this is how far away (depth of field) from the drone the structure will extend. Example ------- To create a black structure 4 blocks wide, 9 blocks tall and 1 block long... box(blocks.wool.black, 4, 9, 1); ... or the following code does the same but creates a variable that can be used for further methods... var drone = new Drone(); drone.box(blocks.wool.black, 4, 9, 1); ![box example 1](img/boxex1.png) Drone.box0() method =================== Another convenience method - this one creates 4 walls with no floor or ceiling. Parameters ---------- * block - the block id - e.g. 6 for an oak sapling or '6:2' for a birch sapling. Alternatively you can use any one of the `blocks` values e.g. `blocks.sapling.birch` * width (optional - default 1) - the width of the structure * height (optional - default 1) - the height of the structure * length (optional - default 1) - the length of the structure - how far away (depth of field) from the drone the structure will extend. Example ------- To create a stone building with the insided hollowed out 7 wide by 3 tall by 6 long... box0( blocks.stone, 7, 3, 6); ![example box0](img/box0ex1.png) Drone.boxa() method =================== Construct a cuboid using an array of blocks. As the drone moves first along the width axis, then the height (y axis) then the length, each block is picked from the array and placed. Parameters ---------- * blocks - An array of blocks - each block in the array will be placed in turn. * width * height * length Example ------- Construct a rainbow-colored road 100 blocks long... var rainbowColors = [blocks.wool.red, blocks.wool.orange, blocks.wool.yellow, blocks.wool.lime, blocks.wool.lightblue, blocks.wool.blue, blocks.wool.purple]; boxa(rainbowColors,7,1,30); ![boxa example](img/boxaex1.png) Drone Movement ============== Drones can move freely in minecraft's 3-D world. You control the Drone's movement using any of the following methods.. * up() * down() * left() * right() * fwd() * back() * turn() ... Each of these methods takes a single optional parameter `numBlocks` - the number of blocks to move in the given direction. If no parameter is given, the default is 1. to change direction use the `turn()` method which also takes a single optional parameter (numTurns) - the number of 90 degree turns to make. Turns are always clock-wise. If the drone is facing north, then drone.turn() will make the turn face east. If the drone is facing east then drone.turn(2) will make the drone turn twice so that it is facing west. Drone Positional Info ===================== * getLocation() - Returns a Bukkit Location object for the drone Drone Markers ============= Markers are useful when your Drone has to do a lot of work. You can set a check-point and return to the check-point using the move() method. If your drone is about to undertake a lot of work - e.g. building a road, skyscraper or forest you should set a check-point before doing so if you want your drone to return to its current location. A 'start' checkpoint is automatically created when the Drone is first created. Markers are created and returned to using the followng two methods... * chkpt - Saves the drone's current location so it can be returned to later. * move - moves the drone to a saved location. Alternatively you can provide an org.bukkit.Location object or x,y,z and direction parameters. Parameters ---------- * name - the name of the checkpoint to save or return to. Example ------- drone.chkpt('town-square'); // // the drone can now go off on a long excursion // for (i = 0; i< 100; i++){ drone.fwd(12).box(6); } // // return to the point before the excursion // drone.move('town-square'); Drone.prism() method ==================== Creates a prism. This is useful for roofs on houses. Parameters ---------- * block - the block id - e.g. 6 for an oak sapling or '6:2' for a birch sapling. Alternatively you can use any one of the `blocks` values e.g. `blocks.sapling.birch` * width - the width of the prism * length - the length of the prism (will be 2 time its height) Example ------- prism(blocks.oak,3,12); ![prism example](img/prismex1.png) Drone.prism0() method ===================== A variation on `prism` which hollows out the inside of the prism. It uses the same parameters as `prism`. Drone.cylinder() method ======================= A convenience method for building cylinders. Building begins radius blocks to the right and forward. Parameters ---------- * block - the block id - e.g. 6 for an oak sapling or '6:2' for a birch sapling. Alternatively you can use any one of the `blocks` values e.g. `blocks.sapling.birch` * radius * height Example ------- To create a cylinder of Iron 7 blocks in radius and 1 block high... cylinder(blocks.iron, 7 , 1); ![cylinder example](img/cylinderex1.png) Drone.cylinder0() method ======================== A version of cylinder that hollows out the middle. Example ------- To create a hollow cylinder of Iron 7 blocks in radius and 1 block high... cylinder0(blocks.iron, 7, 1); ![cylinder0 example](img/cylinder0ex1.png) Drone.arc() method ================== The arc() method can be used to create 1 or more 90 degree arcs in the horizontal or vertical planes. This method is called by cylinder() and cylinder0() and the sphere() and sphere0() methods. Parameters ---------- arc() takes a single parameter - an object with the following named properties... * radius - The radius of the arc. * blockType - The type of block to use - this is the block Id only (no meta). See [Data Values][dv]. * meta - The metadata value. See [Data Values][dv]. * orientation (default: 'horizontal') - the orientation of the arc - can be 'vertical' or 'horizontal'. * stack (default: 1) - the height or length of the arc (depending on the orientation - if orientation is horizontal then this parameter refers to the height, if vertical then it refers to the length). * strokeWidth (default: 1) - the width of the stroke (how many blocks) - if drawing nested arcs it's usually a good idea to set strokeWidth to at least 2 so that there are no gaps between each arc. The arc method uses a [bresenham algorithm][bres] to plot points along the circumference. * fill - If true (or present) then the arc will be filled in. * quadrants (default: `{topleft:true,topright:true,bottomleft:true,bottomright:true}` - An object with 4 properties indicating which of the 4 quadrants of a circle to draw. If the quadrants property is absent then all 4 quadrants are drawn. Examples -------- To draw a 1/4 circle (top right quadrant only) with a radius of 10 and stroke width of 2 blocks ... arc({blockType: blocks.iron, meta: 0, radius: 10, strokeWidth: 2, quadrants: { topright: true }, orientation: 'vertical', stack: 1, fill: false }); ![arc example 1](img/arcex1.png) [bres]: http://en.wikipedia.org/wiki/Midpoint_circle_algorithm [dv]: http://www.minecraftwiki.net/wiki/Data_values Drone.door() method =================== create a door - if a parameter is supplied an Iron door is created otherwise a wooden door is created. Parameters ---------- * doorType (optional - default wood) - If a parameter is provided then the door is Iron. Example ------- To create a wooden door at the crosshairs/drone's location... var drone = new Drone(); drone.door(); To create an iron door... drone.door( blocks.door_iron ); ![iron door](img/doorex1.png) Drone.door2() method ==================== Create double doors (left and right side) Parameters ---------- * doorType (optional - default wood) - If a parameter is provided then the door is Iron. Example ------- To create double-doors at the cross-hairs/drone's location... drone.door2(); ![double doors](img/door2ex1.png) Drone.sign() method =================== Signs must use block 63 (stand-alone signs) or 68 (signs on walls) Parameters ---------- * message - can be a string or an array of strings. * block - can be 63 or 68 Example ------- To create a free-standing sign... drone.sign(["Hello","World"],63); ![ground sign](img/signex1.png) ... to create a wall mounted sign... drone.sign(["Welcome","to","Scriptopia"], 68); ![wall sign](img/signex2.png) Drone Trees methods =================== * oak() * spruce() * birch() * jungle() Example ------- To create 4 trees in a row, point the cross-hairs at the ground then type `/js ` and ... up().oak().right(8).spruce().right(8).birch().right(8).jungle(); Trees won't always generate unless the conditions are right. You should use the tree methods when the drone is directly above the ground. Trees will usually grow if the drone's current location is occupied by Air and is directly above an area of grass (That is why the `up()` method is called first). ![tree example](img/treeex1.png) None of the tree methods require parameters. Tree methods will only be successful if the tree is placed on grass in a setting where trees can grow. Drone.garden() method ===================== places random flowers and long grass (similar to the effect of placing bonemeal on grass) Parameters ---------- * width - the width of the garden * length - how far from the drone the garden extends Example ------- To create a garden 10 blocks wide by 5 blocks long... garden(10,5); ![garden example](img/gardenex1.png) Drone.rand() method =================== rand takes either an array (if each blockid has the same chance of occurring) or an object where each property is a blockid and the value is it's weight (an integer) Example ------- place random blocks stone, mossy stone and cracked stone (each block has the same chance of being picked) rand( [blocks.brick.stone, blocks.brick.mossy, blocks.brick.cracked ],w,d,h) to place random blocks stone has a 50% chance of being picked, rand({blocks.brick.stone: 5, blocks.brick.mossy: 3, blocks.brick.cracked: 2},w,d,h) regular stone has a 50% chance, mossy stone has a 30% chance and cracked stone has just a 20% chance of being picked. Copy & Paste using Drone ======================== A drone can be used to copy and paste areas of the game world. Drone.copy() method =================== Copies an area so it can be pasted elsewhere. The name can be used for pasting the copied area elsewhere... Parameters ---------- * name - the name to be given to the copied area (used by `paste`) * width - the width of the area to copy * height - the height of the area to copy * length - the length of the area (extending away from the drone) to copy Example ------- drone.copy('somethingCool',10,5,10).right(12).paste('somethingCool'); Drone.paste() method ==================== Pastes a copied area to the current location. Example ------- To copy a 10x5x10 area (using the drone's coordinates as the starting point) into memory. the copied area can be referenced using the name 'somethingCool'. The drone moves 12 blocks right then pastes the copy. drone.copy('somethingCool',10,5,10) .right(12) .paste('somethingCool'); Chaining ======== All of the Drone methods return a Drone object, which means methods can be 'chained' together so instead of writing this... drone = new Drone(); drone.fwd(3); drone.left(2); drone.box(2); // create a grass block drone.up(); drone.box(2); // create another grass block drone.down(); ...you could simply write ... var drone = new Drone().fwd(3).left(2).box(2).up().box(2).down(); ... since each Drone method is also a global function that constructs a drone if none is supplied, you can shorten even further to just... fwd(3).left(2).box(2).up().box(2).down() The Drone object uses a [Fluent Interface][fl] to make ScriptCraft scripts more concise and easier to write and read. Minecraft's in-game command prompt is limited to about 80 characters so chaining drone commands together means more can be done before hitting the command prompt limit. For complex building you should save your commands in a new script file and load it using /js load() [fl]: http://en.wikipedia.org/wiki/Fluent_interface Drone Properties ================ * x - The Drone's position along the west-east axis (x increases as you move east) * y - The Drone's position along the vertical axis (y increses as you move up) * z - The Drone's position along the north-south axis (z increases as you move south) * dir - The Drone's direction 0 is east, 1 is south , 2 is west and 3 is north. Extending Drone =============== The Drone object can be easily extended - new buidling recipes/blue-prints can be added and can become part of a Drone's chain using the *static* method `Drone.extend`. Drone.extend() static method ============================ Use this method to add new methods (which also become chainable global functions) to the Drone object. Parameters ---------- * name - The name of the new method e.g. 'pyramid' * function - The method body. Example ------- // submitted by [edonaldson][edonaldson] Drone.extend('pyramid', function(block,height){ this.chkpt('pyramid'); for (var i = height; i > 0; i -= 2) { this.box(block, i, 1, i).up().right().fwd(); } return this.move('pyramid'); }); Once the method is defined (it can be defined in a new pyramid.js file) it can be used like so... var d = new Drone(); d.pyramid(blocks.brick.stone, 12); ... or simply ... pyramid(blocks.brick.stone, 12); [edonaldson]: https://github.com/edonaldson Drone Constants =============== Drone.PLAYER_STAIRS_FACING -------------------------- An array which can be used when constructing stairs facing in the Drone's direction... var d = new Drone(); d.box(blocks.stairs.oak + ':' + Drone.PLAYER_STAIRS_FACING[d.dir]); ... will construct a single oak stair block facing the drone. Drone.PLAYER_SIGN_FACING ------------------------ An array which can be used when placing signs so they face in a given direction. This is used internally by the Drone.sign() method. It should also be used for placing any of the following blocks... * chest * ladder * furnace * dispenser To place a chest facing the Drone ... drone.box( blocks.chest + ':' + Drone.PLAYER_SIGN_FACING[drone.dir]); Drone.PLAYER_TORCH_FACING ------------------------- Used when placing torches so that they face towards the drone. drone.box( blocks.torch + ':' + Drone.PLAYER_TORCH_FACING[drone.dir]); Drone.times() Method ==================== The times() method makes building multiple copies of buildings easy. It's possible to create rows or grids of buildings without resorting to `for` or `while` loops. Parameters ---------- * numTimes (optional - default 2) : The number of times you want to repeat the preceding statements. Example ------- Say you want to do the same thing over and over. You have a couple of options... * You can use a for loop... d = new Drone(); for (var i =0;i < 4; i++){ d.cottage().right(8); } While this will fit on the in-game prompt, it's awkward. You need to declare a new Drone object first, then write a for loop to create the 4 cottages. It's also error prone, even the `for` loop is too much syntax for what should really be simple. * You can use a while loop... d = new Drone(); var i=4; while (i--){ d.cottage().right(8); } ... which is slightly shorter but still too much syntax. Each of the above statements is fine for creating a 1-dimensional array of structures. But what if you want to create a 2-dimensional or 3-dimensional array of structures? Enter the `times()` method. The `times()` method lets you repeat commands in a chain any number of times. So to create 4 cottages in a row you would use the following statement... cottage().right(8).times(4); ...which will build a cottage, then move right 8 blocks, then do it again 4 times over so that at the end you will have 4 cottages in a row. What's more the `times()` method can be called more than once in a chain. So if you wanted to create a *grid* of 20 houses ( 4 x 5 ), you would do so using the following statement... cottage().right(8).times(4).fwd(8).left(32).times(5); ... breaking it down... 1. The first 3 calls in the chain ( `cottage()`, `right(8)`, `times(4)` ) build a single row of 4 cottages. 2. The last 3 calls in the chain ( `fwd(8)`, `left(32)`, `times(5)` ) move the drone forward 8 then left 32 blocks (4 x 8) to return to the original x coordinate, then everything in the chain is repeated again 5 times so that in the end, we have a grid of 20 cottages, 4 x 5. Normally this would require a nested loop but the `times()` method does away with the need for loops when repeating builds. Another example: This statement creates a row of trees 2 by 3 ... oak().right(10).times(2).left(20).fwd(10).times(3) ... You can see the results below. ![times example 1](img/times-trees.png) Drone.blocktype() method ======================== Creates the text out of blocks. Useful for large-scale in-game signs. Parameters ---------- * message - The message to create - (use `\n` for newlines) * foregroundBlock (default: black wool) - The block to use for the foreground * backgroundBlock (default: none) - The block to use for the background Example ------- To create a 2-line high message using glowstone... blocktype("Hello\nWorld",blocks.glowstone); ![blocktype example][imgbt1] [imgbt1]: img/blocktype1.png Blocks Module ============= You hate having to lookup [Data Values][dv] when you use ScriptCraft's Drone() functions. So do I. So I created this blocks object which is a helper object for use in construction. Examples -------- box( blocks.oak ); // creates a single oak wood block box( blocks.sand, 3, 2, 1 ); // creates a block of sand 3 wide x 2 high x 1 long box( blocks.wool.green, 2 ); // creates a block of green wool 2 blocks wide Color aliased properties that were a direct descendant of the blocks object are no longer used to avoid confusion with carpet and stained clay blocks. In addition, there's a convenience array `blocks.rainbow` which is an array of the 7 colors of the rainbow (or closest approximations). Drone.sphere() method ===================== Creates a sphere. Parameters ---------- * block - The block the sphere will be made of. * radius - The radius of the sphere. Example ------- To create a sphere of Iron with a radius of 10 blocks... sphere( blocks.iron, 10); ![sphere example](img/sphereex1.png) Spheres are time-consuming to make. You *can* make large spheres (250 radius) but expect the server to be very busy for a couple of minutes while doing so. Drone.sphere0() method ====================== Creates an empty sphere. Parameters ---------- * block - The block the sphere will be made of. * radius - The radius of the sphere. Example ------- To create a sphere of Iron with a radius of 10 blocks... sphere0( blocks.iron, 10); Spheres are time-consuming to make. You *can* make large spheres (250 radius) but expect the server to be very busy for a couple of minutes while doing so. Drone.hemisphere() method ========================= Creates a hemisphere. Hemispheres can be either north or south. Parameters ---------- * block - the block the hemisphere will be made of. * radius - the radius of the hemisphere * northSouth - whether the hemisphere is 'north' or 'south' Example ------- To create a wood 'north' hemisphere with a radius of 7 blocks... hemisphere(blocks.oak, 7, 'north'); ![hemisphere example](img/hemisphereex1.png) Drone.hemisphere0() method ========================= Creates a hollow hemisphere. Hemispheres can be either north or south. Parameters ---------- * block - the block the hemisphere will be made of. * radius - the radius of the hemisphere * northSouth - whether the hemisphere is 'north' or 'south' Example ------- To create a glass 'north' hemisphere with a radius of 20 blocks... hemisphere0(blocks.glass, 20, 'north'); ![hemisphere example](img/hemisphereex2.png) Drone.rainbow() method ====================== Creates a Rainbow. Parameters ---------- * radius (optional - default:18) - The radius of the rainbow Example ------- var d = new Drone(); d.rainbow(30); ![rainbow example](img/rainbowex1.png) Drone.spiral_stairs() method ============================ Constructs a spiral staircase with slabs at each corner. Parameters ---------- * stairBlock - The block to use for stairs, should be one of the following... - 'oak' - 'spruce' - 'birch' - 'jungle' - 'cobblestone' - 'brick' - 'stone' - 'nether' - 'sandstone' - 'quartz' * flights - The number of flights of stairs to build. ![Spiral Staircase](img/spiralstair1.png) Example ------- To construct a spiral staircase 5 floors high made of oak... spiral_stairs('oak', 5); Classroom Module ================ The `classroom` object contains a couple of utility functions for use in a classroom setting. The goal of these functions is to make it easier for tutors to facilitate ScriptCraft for use by students in a classroom environment. Although granting ScriptCraft access to students on a shared server is potentially risky (Students can potentially abuse it), it is slighlty less risky than granting operator privileges to each student. (Enterprising students will quickly realise how to grant themselves and others operator privileges once they have access to ScriptCraft). The goal of this module is not so much to enforce restrictions (security or otherwise) but to make it easier for tutors to setup a shared server so students can learn Javascript. classroom.allowScripting() function =================================== Allow or disallow anyone who connects to the server (or is already connected) to use ScriptCraft. This function is preferable to granting 'ops' privileges to every student in a Minecraft classroom environment. Parameters ---------- * canScript : true or false Example ------- To allow all players (and any players who connect to the server) to use the `js` and `jsp` commands... /js classroom.allowScripting(true) To disallow scripting (and prevent players who join the server from using the commands)... /js classroom.allowScripting(false) Only ops users can run the classroom.allowScripting() function - this is so that students don't try to bar themselves and each other from scripting. events Module ============= The Events module provides a thin wrapper around Bukkit's Event-handling API. Bukkit's Events API makes use of Java Annotations which are not available in Javascript, so this module provides a simple way to listen to minecraft events in javascript. events.on() static method ========================= This method is used to register event listeners. Parameters ---------- * eventName - A string or java class. If a string is supplied it must be part of the Bukkit event class name. See [Bukkit API][buk] for details of the many bukkit event types. When a string is supplied there is no need to provide the full class name - you should omit the 'org.bukkit.event' prefix. e.g. if the string "block.BlockBreakEvent" is supplied then it's converted to the org.bukkit.event.block.BlockBreakEvent class . If a java class is provided (say in the case where you've defined your own custom event) then provide the full class name (without enclosing quotes). * callback - A function which will be called whenever the event fires. The callback should take 2 parameters, listener (the Bukkit registered listener for this callback) and event (the event fired). * priority (optional - default: "HIGHEST") - The priority the listener/callback takes over other listeners to the same event. Possible values are "HIGH", "HIGHEST", "LOW", "LOWEST", "NORMAL", "MONITOR". For an explanation of what the different priorities mean refer to bukkit's [Event API Reference][buk2]. Returns ------- An org.bukkit.plugin.RegisteredListener object which can be used to unregister the listener. This same object is passed to the callback function each time the event is fired. Example: ------ The following code will print a message on screen every time a block is broken in the game events.on("block.BlockBreakEvent", function(listener, evt){ echo (evt.player.name + " broke a block!"); }); To handle an event only once and unregister from further events... events.on("block.BlockBreakEvent", function(listener, evt){ print (evt.player.name + " broke a block!"); evt.handlers.unregister(listener); }); To unregister a listener *outside* of the listener function... var myBlockBreakListener = events.on("block.BlockBreakEvent",function(l,e){ ... }); ... var handlers = org.bukkit.event.block.BlockBreakEvent.getHandlerList(); handlers.unregister(myBlockBreakListener); [buk2]: http://wiki.bukkit.org/Event_API_Reference [buk]: http://jd.bukkit.org/dev/apidocs/index.html?org/bukkit/event/Event.html Fireworks Module ================ The fireworks module makes it easy to create fireworks using ScriptCraft. The module has a single function `firework` which takes a `org.bukkit.Location` as its 1 and only parameter. Examples -------- The module also extends the `Drone` object adding a `firework` method so that fireworks can be created as a part of a Drone chain. For Example.... /js firework() ... creates a single firework, while .... /js firework.fwd(3).times(5) ... creates 5 fireworks in a row. Fireworks have also been added as a possible option for the `arrow` module. To have a firework launch where an arrow strikes... /js arrows.firework() To call the fireworks.firework() function directly, you must provide a location. For example... /js fireworks.firework(self.location); ![firework example](img/firework.png) http.request() function ==================== The http.request() function will fetch a web address asynchronously (on a separate thread)and pass the URL's response to a callback function which will be executed synchronously (on the main thread). In this way, http.request() can be used to fetch web content without blocking the main thread of execution. Parameters ---------- * request: The request details either a plain URL e.g. "http://scriptcraft.js/sample.json" or an object with the following properties... - url: The URL of the request. - method: Should be one of the standard HTTP methods, GET, POST, PUT, DELETE (defaults to GET). - params: A Javascript object with name-value pairs. This is for supplying parameters to the server. * callback: The function to be called when the Web request has completed. This function takes the following parameters... - responseCode: The numeric response code from the server. If the server did not respond with 200 OK then the response parameter will be undefined. - response: A string (if the response is of type text) or object containing the HTTP response body. Example ------- The following example illustrates how to use http.request to make a request to a JSON web service and evaluate its response... var jsResponse; http.request("http://scriptcraftjs.org/sample.json",function(responseCode, responseBody){ jsResponse = eval("(" + responseBody + ")"); }); ... The following example illustrates a more complex use-case POSTing parameters to a CGI process on a server... http.request({ url: "http://pixenate.com/pixenate/pxn8.pl", method: "POST", params: {script: "[]"} }, function( responseCode, responseBody){ var jsObj = eval("(" + responseBody + ")"); }); Utilities Module ================ Miscellaneous utility functions and classes to help with programming. * locationToString(Location) - returns a bukkit Location object in string form. * getPlayerObject(playerName) - returns the Player object for a named player or `self` if no name is provided. utils.foreach() function ======================== The utils.foreach() function is a utility function for iterating over an array of objects (or a java.util.Collection of objects) and processing each object in turn. Where utils.foreach() differs from other similar functions found in javascript libraries, is that utils.foreach can process the array immediately or can process it *nicely* by processing one item at a time then delaying processing of the next item for a given number of server ticks (there are 20 ticks per second on the minecraft main thread). This method relies on Bukkit's [org.bukkit.scheduler][sched] package for scheduling processing of arrays. [sched]: http://jd.bukkit.org/beta/apidocs/org/bukkit/scheduler/package-summary.html Parameters ---------- * array : The array to be processed - It can be a javascript array, a java array or java.util.Collection * callback : The function to be called to process each item in the array. The callback function should have the following signature `callback(item, index, object, array)`. That is the callback will be called with the following parameters.... - item : The item in the array - index : The index at which the item can be found in the array. - object : Additional (optional) information passed into the foreach method. - array : The entire array. * object (optional) : An object which may be used by the callback. * delay (optional, numeric) : If a delay is specified (in ticks - 20 ticks = 1 second), then the processing will be scheduled so that each item will be processed in turn with a delay between the completion of each item and the start of the next. This is recommended for big builds (say 200 x 200 x 200 blocks) or any CPU-intensive process. * onDone (optional, function) : A function to be executed when all processing is complete. This parameter is only used when the processing is delayed. (It's optional even if a delay parameter is supplied). If called with a delay parameter then foreach() will return immediately after processing just the first item in the array (all subsequent items are processed later). If your code relies on the completion of the array processing, then provide an `onDone` parameter and put the code there. Example ------- The following example illustrates how to use foreach for immediate processing of an array... var players = ["moe", "larry", "curly"]; utils.foreach (players, function(item){ server.getPlayer(item).sendMessage("Hi " + item); }); ... The `utils.foreach()` function can work with Arrays or any Java-style collection. This is important because many objects in the Bukkit API use Java-style collections... utils.foreach( server.onlinePlayers, function(player){ player.chat("Hello!"); }); ... the above code sends a "Hello!" to every online player. The following example is a more complex use case - The need to build an enormous structure without hogging CPU usage... // build a structure 200 wide x 200 tall x 200 long // (That's 8 Million Blocks - enough to tax any machine!) var a = []; a.length = 200; var drone = new Drone(); var processItem = function(item, index, object, array){ // build a box 200 wide by 200 long then move up drone.box(blocks.wood, 200, 1, 200).up(); }; // by the time the job's done 'self' might be someone else // assume this code is within a function/closure var player = self; var onDone = function(){ player.sendMessage("Job Done!"); }; utils.foreach (a, processItem, null, 10, onDone); utils.nicely() function ======================= The utils.nicely() function is for performing processing using the [org.bukkit.scheduler][sched] package/API. utils.nicely() lets you process with a specified delay between the completion of each `next()` function and the start of the next `next()` function. `utils.nicely()` is a recursive function - that is - it calls itself (schedules itself actually) repeatedly until `hasNext` returns false. Parameters ---------- * next : A function which will be called if processing is to be done. * hasNext : A function which is called to determine if the `next` callback should be invoked. This should return a boolean value - true if the `next` function should be called (processing is not complete), false otherwise. * onDone : A function which is to be called when all processing is complete (hasNext returned false). * delay : The delay (in server ticks - 20 per second) between each call. Example ------- See the source code to utils.foreach for an example of how utils.nicely is used. utils.at() function =================== The utils.at() function will perform a given task at a given time every (minecraft) day. Parameters ---------- * time24hr : The time in 24hr form - e.g. 9:30 in the morning is "09:30" while 9:30 pm is "21:30", midnight is "00:00" and midday is "12:00" * callback : A javascript function which will be invoked at the given time. * world : (optional) Each world has its own clock. If no world is specified, the server's first world is used. Example ------- To warn players when night is approaching... utils.at( "19:00", function() { utils.foreach( server.onlinePlayers, function(player){ player.chat("The night is dark and full of terrors!"); }); }, self.world); String class extensions ----------------------- The following chat-formatting methods are added to the javascript String class.. * aqua() * black() * blue() * bold() * brightgreen() * darkaqua() * darkblue() * darkgray() * darkgreen() * purple() * darkpurple() * darkred() * gold() * gray() * green() * italic() * lightpurple() * indigo() * green() * red() * pink() * yellow() * white() * strike() * random() * magic() * underline() * reset() Example ------- var boldGoldText = "Hello World".bold().gold(); self.sendMessage(boldGoldText);

Hello World