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Added section on event-driven programming and lookup tables to young persons' guide

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docs/YoungPersonsGuideToProgrammingMinecraft.md
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@ -1,5 +1,40 @@
# The Young Person's Guide to Programming in Minecraft # The Young Person's Guide to Programming in Minecraft
## Table of Contents
* [Introduction](#introduction)
* [Installation](#installation)
* [Learning Javascript](#learning-javascript)
* [First Steps](#first-steps)
* [Variables](#variables)
* [Functions](#functions)
* [Building stuff in Minecraft](#building-stuff-in-minecraft)
* [Common Block Materials](#common-block-materials)
* [Dimensions](#dimensions)
* [More Shapes](#more-shapes)
* [The Drone Object](#the-drone-object)
* [Movement](#movement)
* [Chaining - Combining Building and Movement](#chaining---combining-building-and-movement)
* [Exercise - Build a simple dwelling](#exercise---build-a-simple-dwelling)
* [Remembering where you started](#remembering-where-you-started)
* [Saving your work](#saving-your-work)
* [Your first Minecraft Mod!](#your-first-minecraft-mod)
* [Parameters](#parameters)
* [true or false](#true-or-false)
* [More fun with `true` or `false`](#more-fun-with-true-or-false)
* [...and Again, and Again, and Again,...](#and-again-and-again-and-again)
* [Counting to 100](#counting-to-100)
* [Saying "Hi!" to every player](#saying-hi-to-every-player)
* [While Loops](#while-loops)
* [`utils.foreach()` - Yet another way to process Arrays](#utilsforeach---yet-another-way-to-process-arrays)
* [Exercise](#exercise)
* [Putting `for` loops to use - Building a Skyscraper](#putting-for-loops-to-use---building-a-skyscraper)
* [Making Decisions](#making-decisions)
* [Event-Driven programming](#event-driven-programming)
* [Stop listening to events](#stop-listening-to-events)
* [Keeping Score - Lookup tables in Javascript](#keeping-score---lookup-tables-in-javascript)
* [Next Steps](#next-steps)
## Introduction ## Introduction
Minecraft is an open-ended 3D game where you can build and craft Minecraft is an open-ended 3D game where you can build and craft
@ -98,7 +133,7 @@ A variable is how you name something for the computer (and you the
programmer) to remember. You create a new variable in Javascript using programmer) to remember. You create a new variable in Javascript using
the `var` keyword... the `var` keyword...
/js var location = "Blackrock Castle" /js var location = 'Blackrock Castle'
... creates a new variable called `location` and stores the text ... creates a new variable called `location` and stores the text
`Blackrock Castle` in it. Now the computer has a new item in its memory `Blackrock Castle` in it. Now the computer has a new item in its memory
@ -110,8 +145,8 @@ called `location`. We can use that name like this...
Blackrock Castle Blackrock Castle
...You might be wondering where the `""` (called double-quotes) went. ...You might be wondering where the `''` (called double-quotes) went.
When telling the computer to store some text, you have to put `"` When telling the computer to store some text, you have to put `'`
(that's the double-quote character - press Shift+2) at the start and end (that's the double-quote character - press Shift+2) at the start and end
of the text. The computer doesn't store these quote characters, only the of the text. The computer doesn't store these quote characters, only the
text between them. The computer will store the variables while the text between them. The computer will store the variables while the
@ -121,7 +156,7 @@ pressing enter. You can repeat that statement as many times as you like
and the computer will always display the same value. You can change the and the computer will always display the same value. You can change the
value like this... value like this...
/js location = "Mahon Point" /js location = 'Mahon Point'
...notice this time I didn't use the `var` keyword. I didn't need to. ...notice this time I didn't use the `var` keyword. I didn't need to.
The `var` keyword is only needed when you first create the variable. Now The `var` keyword is only needed when you first create the variable. Now
@ -135,7 +170,7 @@ execute this command...
Variables can be created and changed easily in Javascript. Along with Variables can be created and changed easily in Javascript. Along with
the variables you'll create in your in-game commands and scripts, there the variables you'll create in your in-game commands and scripts, there
are handy "free" variables created for you by ScriptCraft. One such variable is are handy *free* variables created for you by ScriptCraft. One such variable is
`self`, it contains information about the current player (that's you)... `self`, it contains information about the current player (that's you)...
/js echo ( self ) /js echo ( self )
@ -258,7 +293,7 @@ ground, then type the following and hit enter...
... This will change the targeted block to wood. What's happened here ... This will change the targeted block to wood. What's happened here
is the `box()` function has created a single new wooden is the `box()` function has created a single new wooden
block. `blocks` is another one of those "free" variables you get in block. `blocks` is another one of those *free* variables you get in
ScriptCraft, you can see a list of block materials by typing ... ScriptCraft, you can see a list of block materials by typing ...
/js blocks. /js blocks.
@ -274,21 +309,21 @@ In Minecraft Programming, Materials aren't known by their name,
instead numbers (sometimes 2 numbers) are used to indicate which instead numbers (sometimes 2 numbers) are used to indicate which
material should be used. For example the number 2 is grass, 1 is material should be used. For example the number 2 is grass, 1 is
cobblestone etc, while 5 is wood (oak). There are different types of cobblestone etc, while 5 is wood (oak). There are different types of
wood so the text "5:1" means Spruce, "5:2" means Birch and "5:3" means wood so the text '5:1' means Spruce, '5:2' means Birch and '5:3' means
Jungle wood. There are many different materials in the Minecraft world, the most Jungle wood. There are many different materials in the Minecraft world, the most
commonly used materials for building are: commonly used materials for building are:
* "4" - Cobblestone or `blocks.cobblestone` * '4' - Cobblestone or `blocks.cobblestone`
* "5" - Wooden Planks or `blocks.oak` * '5' - Wooden Planks or `blocks.oak`
* "5:2" - Birch wood Planks (light wood) or `blocks.birch` * '5:2' - Birch wood Planks (light wood) or `blocks.birch`
* "98" - Stone bricks or `blocks.brick.stone` * '98' - Stone bricks or `blocks.brick.stone`
* "45" - Red bricks or `blocks.brick.red` * '45' - Red bricks or `blocks.brick.red`
* "68" - Sign or `blocks.sign` * '68' - Sign or `blocks.sign`
* "102" - Glass panes (for windows) or `blocks.glass_pane` * '102' - Glass panes (for windows) or `blocks.glass_pane`
You can create a single wooden block using the numeric values or the `blocks` variable. For example... You can create a single wooden block using the numeric values or the `blocks` variable. For example...
/js box( "5" ) /js box( '5' )
... and ... ... and ...
@ -375,7 +410,7 @@ A series of 2 boxes is created 3 blocks apart.
OK. You know enough now about the `Drone` functions to be able to OK. You know enough now about the `Drone` functions to be able to
build a simple dwelling. The dwelling should be a hollow building with build a simple dwelling. The dwelling should be a hollow building with
a sloped roof. *Don't worry about doors or windows for now*. The walls a sloped roof. *Don't worry about doors or windows for now*. The walls
should be made of Cobblestone ("4") and the roof made of wood ("5"). You can use should be made of Cobblestone ('4') and the roof made of wood ('5'). You can use
the following `Drone` functions to create a dwelling 7 blocks wide by the following `Drone` functions to create a dwelling 7 blocks wide by
3 blocks high by 6 blocks long with a wooden sloped roof. It's up 3 blocks high by 6 blocks long with a wooden sloped roof. It's up
to you to figure out how. to you to figure out how.
@ -393,14 +428,14 @@ Your dwelling should end up looking something like this...
Sometimes when you're building something big that requires lots of Sometimes when you're building something big that requires lots of
manoeuvering by your Drone, you need to leave breadcrumbs as you go so manoeuvering by your Drone, you need to leave breadcrumbs as you go so
your `Drone` can return to where it started. Every new Drone has a your `Drone` can return to where it started. Every new Drone has a
`"start"` checkpoint that it can return to by executing `'start'` checkpoint that it can return to by executing
`move("start")` ... `move('start')` ...
/js box("5").up(3).left(4).box("1").turn(3).fwd(5).right().box("1").move("start") /js box('5').up(3).left(4).box('1').turn(3).fwd(5).right().box('1').move('start')
... A genius would have trouble figuring out how to get back ... A genius would have trouble figuring out how to get back
to where they started. Fortunately, they don't have to - the to where they started. Fortunately, they don't have to - the
`move("start")` function will take the Drone back to its starting `move('start')` function will take the Drone back to its starting
point. point.
* `chkpt( breadCrumb )` - Leaves a mark at your Drone's current * `chkpt( breadCrumb )` - Leaves a mark at your Drone's current
@ -440,7 +475,7 @@ object can do, let's use that knowledge to create a Minecraft Mod!
Once you've installed Notepad++, Launch it, create a new file and type the following... Once you've installed Notepad++, Launch it, create a new file and type the following...
exports.greet = function(player){ exports.greet = function(player){
player.sendMessage("Hi " + player.name); player.sendMessage('Hi ' + player.name);
} }
... then save the file in a new directory ... then save the file in a new directory
@ -455,7 +490,7 @@ type...
... to reload all of the server plugins. Your mod has just been ... to reload all of the server plugins. Your mod has just been
loaded. Try it out by typing this command... loaded. Try it out by typing this command...
/js greet() /js greet(self)
... it should display ... ... it should display ...
@ -473,7 +508,7 @@ when creating more complex mods.
The `exports` variable is a special variable you can use in your mod The `exports` variable is a special variable you can use in your mod
to provide functions, objects and variables for others to use. If you to provide functions, objects and variables for others to use. If you
want to provide something for other programmers to use, you should want to provide something for other programmers to use, you should
"export" it using the special `exports` variable. The syntax is *export* it using the special `exports` variable. The syntax is
straightforward and you can use the same `exports` variable to export straightforward and you can use the same `exports` variable to export
one or more functions, objects or variables. For example... one or more functions, objects or variables. For example...
@ -490,9 +525,9 @@ one or more functions, objects or variables. For example...
and `snowball()` which can be invoked from the in-game prompt like and `snowball()` which can be invoked from the in-game prompt like
this `/js egg(self)` or `/js snowball(self)`. this `/js egg(self)` or `/js snowball(self)`.
### Parameters ## Parameters
If you want to change the `greet()` function so that it displays a If you want to change the `greet()` function so that it displays a
greeting other than "Hi " you can change the code in the `greet()` greeting other than 'Hi ' you can change the code in the `greet()`
function, or better still, you can use *Parameters*. Parameters are function, or better still, you can use *Parameters*. Parameters are
values you provide to a function so that the function behaves values you provide to a function so that the function behaves
differently each time it is called. differently each time it is called.
@ -508,11 +543,11 @@ Change the `greet()` function so that it looks like this...
... Save your greet.js file and issue the `/js refresh()` command in ... Save your greet.js file and issue the `/js refresh()` command in
minecraft. Now enter the following command in Minecraft... minecraft. Now enter the following command in Minecraft...
greet("Hello ",self); greet('Hello ',self);
... Now try ... ... Now try ...
greet("Dia Dhuit ",self); greet('Dia Dhuit ',self);
... you should see the following messages in your chat window... ... you should see the following messages in your chat window...
@ -523,7 +558,7 @@ minecraft. Now enter the following command in Minecraft...
they're called. As you'll see later, Parameters are very useful when they're called. As you'll see later, Parameters are very useful when
changing the behaviour of MineCraft. changing the behaviour of MineCraft.
### true or false ## true or false
Try entering each of the following statements and make a note of the Try entering each of the following statements and make a note of the
answers given by minecraft... answers given by minecraft...
@ -567,7 +602,7 @@ things...
... try comparing some more numbers yourself - say for example, ... try comparing some more numbers yourself - say for example,
compare the ages of your friends or siblings to your own age. compare the ages of your friends or siblings to your own age.
### More fun with `true` or `false` ## More fun with `true` or `false`
You can find out if you can Fly in minecraft by typing the following statement... You can find out if you can Fly in minecraft by typing the following statement...
/js self.allowFlight /js self.allowFlight
@ -616,14 +651,14 @@ called `API` calls - these are calls to functions and methods in
Minecraft - you can read more about these on the [CraftBukkit API Minecraft - you can read more about these on the [CraftBukkit API
Reference][cbapi].) Reference][cbapi].)
### ...and Again, and Again, and Again,... ## ...and Again, and Again, and Again,...
One of the things Computers are really good at is One of the things Computers are really good at is
repetition. Computers don't get tired or bored of doing the same thing repetition. Computers don't get tired or bored of doing the same thing
over and over again. Loops are handy, if you want to run the same over and over again. Loops are handy, if you want to run the same
code over and over again, each time with a different value. code over and over again, each time with a different value.
#### Counting to 100 ### Counting to 100
At the in-game command prompt (hint: press 't') type the following then hit Enter... At the in-game command prompt (hint: press 't') type the following then hit Enter...
@ -651,11 +686,11 @@ The `for` statement is useful when you want to repeat something over and over. I
remember, an Array is just a list of things, for example - the players remember, an Array is just a list of things, for example - the players
connnected to a server, the worlds of a server and so on. connnected to a server, the worlds of a server and so on.
#### Saying "Hi!" to every player ### Saying "Hi!" to every player
At the in-game command prompt type the following then hit Enter... At the in-game command prompt type the following then hit Enter...
/js for (var i = 0;i < server.onlinePlayers.length; i++){ server.onlinePlayers[i].sendMessage("Hi!"); } /js for (var i = 0;i < server.onlinePlayers.length; i++){ server.onlinePlayers[i].sendMessage('Hi!'); }
... Lets look at these statements in more detail. We had to enter the ... Lets look at these statements in more detail. We had to enter the
statements on a single line at the in-game command prompt but the statements on a single line at the in-game command prompt but the
@ -664,7 +699,7 @@ statements could be written like this...
var players = server.onlinePlayers; var players = server.onlinePlayers;
for (var i = 0; i < players.length; i++) { for (var i = 0; i < players.length; i++) {
var player = players[i]; var player = players[i];
player.sendMessage("Hi!"); player.sendMessage('Hi!');
} }
... On the first line, a new variable `players` is created from the ... On the first line, a new variable `players` is created from the
@ -698,7 +733,7 @@ the bottom of the file...
var players = server.onlinePlayers; var players = server.onlinePlayers;
for (var i = 0; i < players.length; i++) { for (var i = 0; i < players.length; i++) {
var player = players[i]; var player = players[i];
player.sendMessage("Hi!"); player.sendMessage('Hi!');
} }
} }
@ -709,7 +744,7 @@ loop and arrays. Arrays and `for` loops are used heavily in all types
of software, in fact there probably isn't any software that doesn't of software, in fact there probably isn't any software that doesn't
use `for` loops and Arrays to get things done. use `for` loops and Arrays to get things done.
### While Loops ## While Loops
Another way to repeat things over and over is to use a `while` Another way to repeat things over and over is to use a `while`
loop. The following `while` loop counts to 100... loop. The following `while` loop counts to 100...
@ -752,7 +787,7 @@ a matter of personal taste, `for` loops are more commonly used with
Arrays but as you see from the example above, `while` loops can also Arrays but as you see from the example above, `while` loops can also
loop over Arrays. loop over Arrays.
### `utils.foreach()` - Yet another way to process Arrays ## `utils.foreach()` - Yet another way to process Arrays
Both the `for` statement and `while` statement are standard commonly Both the `for` statement and `while` statement are standard commonly
used javascript statements used for looping. ScriptCraft also comes used javascript statements used for looping. ScriptCraft also comes
@ -805,7 +840,7 @@ utils.foreach() function...
} }
); );
#### Exercise ### Exercise
Try changing the above function so that different sounds are played Try changing the above function so that different sounds are played
instead of a Cat's Meow. You'll need to lookup the [CraftBukkit API's instead of a Cat's Meow. You'll need to lookup the [CraftBukkit API's
Sound class][soundapi] to see all of the possible sounds that can be Sound class][soundapi] to see all of the possible sounds that can be
@ -816,7 +851,7 @@ provides `for` and `while` statements for looping and many javascript
libraries also provide their own custom looping functions. You should libraries also provide their own custom looping functions. You should
use what you feel most comfortable with. use what you feel most comfortable with.
### Putting `for` loops to use - Building a Skyscraper ## Putting `for` loops to use - Building a Skyscraper
For loops can be used to build enormous structures. In this next For loops can be used to build enormous structures. In this next
exercise I'm going to use a for loop to build a skyscraper. This exercise I'm going to use a for loop to build a skyscraper. This
@ -849,7 +884,7 @@ type the following...
return this.move('myskyscraper'); // return to where we started return this.move('myskyscraper'); // return to where we started
}; };
load("../drone/drone.js"); load('../drone/drone.js');
Drone.extend('myskyscraper',myskyscraper); Drone.extend('myskyscraper',myskyscraper);
... so this takes a little explaining. First I create a new function ... so this takes a little explaining. First I create a new function
@ -885,7 +920,7 @@ that out, creating an entire city of blocks of skyscrapers is the next
logical step. Of course, Minecraft doesn't have the same constraints logical step. Of course, Minecraft doesn't have the same constraints
as real-world densely populated areas so let your imagination go wild. as real-world densely populated areas so let your imagination go wild.
### Making Decisions ## Making Decisions
All the programs we have seen so far have been fairly predictable - they went All the programs we have seen so far have been fairly predictable - they went
straight through the statements, and then went back to the beginning again. This is straight through the statements, and then went back to the beginning again. This is
@ -893,7 +928,7 @@ not very useful. In practice the computer would be expected to make decisions an
act accordingly. The javascript statement used for making decisions is `if`. act accordingly. The javascript statement used for making decisions is `if`.
While standing on the ground in-game, type the following at the command prompt... While standing on the ground in-game, type the following at the command prompt...
/js if ( self.flying ) { echo("Hey, You are flying!"); } /js if ( self.flying ) { echo('Hey, You are flying!'); }
... No message should appear on screen. That is - `Hey, You are ... No message should appear on screen. That is - `Hey, You are
flying!` should *not* appear on screen. Now double-tap the `space` flying!` should *not* appear on screen. Now double-tap the `space`
@ -903,7 +938,7 @@ enter the same statement again (If you don't want to type the same
statement again, just press `/` then press the `UP` cursor key on your statement again, just press `/` then press the `UP` cursor key on your
keyboard, the statement you entered previously should reappear. keyboard, the statement you entered previously should reappear.
/js if ( self.flying ) { echo("Hey, You are flying!"); } /js if ( self.flying ) { echo('Hey, You are flying!'); }
... this time the following message should have appeared on your screen... ... this time the following message should have appeared on your screen...
@ -919,7 +954,7 @@ What if you wanted to display a message only if a condition is *not*
true ? For example to only display a message if the player is *not* true ? For example to only display a message if the player is *not*
flying... flying...
/js if ( ! self.flying ) { echo ("You are not flying."); } /js if ( ! self.flying ) { echo ('You are not flying.'); }
... This code differs in that now there's a `!` (the exclamation mark) ... This code differs in that now there's a `!` (the exclamation mark)
before `self.flying`. The `!` symbol negates (returns the opposite of) before `self.flying`. The `!` symbol negates (returns the opposite of)
@ -948,7 +983,183 @@ whether or not you're currently flying. Type the `/js flightStatus()`
command while on the ground and while flying. The message displayed in command while on the ground and while flying. The message displayed in
each case should be different. each case should be different.
### Next Steps ## Event-Driven programming
So far we've written code which executes when you invoke the `/js `
command. What if - for example - you want to have some special
behaviour which occurs when a player joins the game? What if you
wanted to display a custom welcome message (in addition to the MotD -
message-of-the-day which is configurable in your server.properties
file) ? This is where *Event-Driven Programming* comes
in. Event-Driven Programming is just a fancy way of saying 'Do this
when that happens' where 'this' is a function you define, and 'that'
is some event which occurs. There are hundreds of events in the
minecraft game...
* Every time someone joins the server - that's an event!
* Every time someone breaks a block - that's an event!
* Every time someone shoots an arrow - that's an event! and so on...
You can write a function which will be called whenever a specific type
of event occurs, it's probably best to illustrate this by example. The
following code sends a message to any player who breaks a block in the
game...
events.on('block.BlockBreakEvent', function (listener, event) {
var breaker = event.player;
breaker.sendMessage('You broke a block');
});
The `events.on()` function is how you *register* a function which you
want to be called whenever a particular type of event occurs. In the
above code the first parameter `'block.BlockBreakEvent'` is the type
of event I want to listen for and the second parameter is the function
I want to be called when that event occurs. The function I want called
in turn takes 2 parameters. The `event` object has all the information
about the event which just occurred. I can tell who broke the block
and send a message to the player. The important thing to note is that
the function defined above will not be called until a player breaks a
block. Try it - save the above code in a new file in the
`scriptcraft/plugins` directory then type `/js refresh()` to reload
scriptcraft. Then break a block in the game and you should see the
message 'You broke a block'.
There are many types of events you can listen for in Minecraft. You can
browse [all possible Bukkit events][bkevts] (click the 'Next
Package' and 'Previous Package' links to browse).
It's important to note that when browsing the Bukkit API's
[org.bukkit.event][bkevts] package, if you see a class called
'org.bukkit.events.entity.EntityShootBowEvent', then when calling
`events.on()` you can listen to such an event using either the fully
qualified Class name...
events.on(org.bukkit.events.entity.EntityShootBowEvent, function( listener, event) {
...
});
or an abbreviated name in string form...
events.on('entity.EntityShootBowEvent', function( listener, event) {
...
});
If the `events.on()` function gets a String (text) as its first
parameter it automatically converts it to the appropriate Class by
prepending the 'org.bukkit.events' package.
For custom events (events which aren't in the org.bukkit.event tree)
just specify the fully qualified class name instead. E.g. ...
events.on ( net.yourdomain.events.YourEvent, function(listener, event ) {
...
});
### Stop listening to events.
If you want an event handler to only execute once, you can remove the handler like this...
events.on('block.BlockBreakEvent', function(listener, evt) {
var breaker = evt.player;
breaker.sendMessage('You broke a block');
evt.handlers.unregister( listener );
});
The `evt.handlers.unregister( listener );` statement will remove this
function from the list of listeners for this event.
## Keeping Score - Lookup tables in Javascript
In the *Event-Driven Programming* section, I defined a function which
displayed a message to players every time they broke a block. Imagine
if I wanted to keep a count of how many blocks each player has broken?
This is where Javascript's Objecct literals come in handy. An object
literal in javascript is simply a way of creating a new Object
on-the-fly in your code. This is an example...
var myNewObject = { name: 'walter', country: 'Ireland' };
... I created a new object with two properties 'name' and
'country'. The notation used to create this object is called JSON
which is short for JavaScript Object Notation. If I want to find out
the 'country' property of the myNewObject variable there are a few
ways I can do it...
var playerCountry = myNewObject.country;
... or ...
var playerCountry = myNewObject['country']
... JavaScript lets you access any object property using either
dot-notation ( `object.property` ) or by index ( `object['property']`
). The result in both cases is the same - playerCountry will be
'Ireland'. When accessing the object by indexing, the property doesn't
even have to be a string literal - it can be a variable like this...
var propertyName = 'country';
var propertyValue = myNewObject[propertyName];
... in the above example, the propertyName variable is used when
indexing. What this means is that every object in JavaScript can act
like a lookup table? What's a lookup table? A table you 'look up' of
course. This is a table of names and scores...
Name Score
-------- -----
walter 5
tom 6
jane 8
bart 7
... If I want to find Jane's score, I look *down* the list of names in
the name column until I find 'jane' then look *across* to get her
score. In Javascript, an object which stored such a table would look
like this...
var scoreboard = {
walter: 5,
tom: 6,
jane: 8,
bart: 7
};
... and if I wanted to write a function which took a player name as a
parameter and returned their score, I'd do it like this...
function getScore(player){
return scoreboard[ player ];
}
... I might call such a function like this...
var janesScore = getScore('jane'); // returns 8
... putting it all together, a hypothetical scoreboard.js mdoule might
look something like this...
var utils = require('utils');
var scores = {};
exports.initialise = function(names){
scores = {};
utils.foreach(names, function(name){
scores[name] = 0;
});
};
/* changes score by diff e.g. to add 6 to the player's current score
updateScore('walter',6); // walter's new score = 5 + 6 = 11.
*/
exports.updateScore = function(name, diff){
scores[name] += diff;
};
exports.getScore = function(name){
return scores[name];
};
## Next Steps
This guide is meant as a gentle introduction to programming and This guide is meant as a gentle introduction to programming and
modding Minecraft using the Javascript Programming Language. modding Minecraft using the Javascript Programming Language.
@ -974,10 +1185,10 @@ different objects and methods available for use by ScriptCraft.
[cbapi]: http://jd.bukkit.org/beta/apidocs/ [cbapi]: http://jd.bukkit.org/beta/apidocs/
[boole]: http://en.wikipedia.org/wiki/George_Boole [boole]: http://en.wikipedia.org/wiki/George_Boole
[soundapi]: http://jd.bukkit.org/beta/apidocs/org/bukkit/Sound.html [soundapi]: http://jd.bukkit.org/beta/apidocs/org/bukkit/Sound.html
[ap]: http://walterhiggins.net/blog/ScriptCraft-1-Month-later [ap]: Anatomy-of-a-Plugin.md
[api]: API-Reference.md [api]: API-Reference.md
[twl]: http://www.barebones.com/products/textwrangler/ [twl]: http://www.barebones.com/products/textwrangler/
[bkevts]: http://jd.bukkit.org/dev/apidocs/org/bukkit/event/package-summary.html
[img_echo_date]: img/ypgpm_echo_date.png [img_echo_date]: img/ypgpm_echo_date.png
[img_3d_shapes]: img/ypgpm_3dshapes.jpg [img_3d_shapes]: img/ypgpm_3dshapes.jpg
[img_whd]: img/ypgpm_whd.jpg [img_whd]: img/ypgpm_whd.jpg