#Diamond Lang Diamond Lang is a minimal framework for Ruby that compiles into Minecraft One Command Creations.

#Installation:

DiamondLang is a Ruby Gem.

##Ruby DiamondLang is tested to work on Ruby 2.2.X. If you don't have Ruby 2.2.X, but know how to install it, do so in your preferred way. Otherwise, read on:

###Mac Or Linux

Open Terminal (or your equivalent, on Linux) and type:

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
\curl -sSL https://get.rvm.io | bash -s stable --ruby

###Windows Go to http://rubyinstaller.org and download the correct version of Ruby.

##Gem

You should have ruby gems, which allows you to download gems. To install diamond lang, type the following in your terminal:

gem diamond-lang

Now, you're good to go.

---

#Getting Started Using diamond lang is simpler then command blocks, although we'd recommend learning [a bit of ruby first][try-ruby] - that guide will only take 15 minutes, and is completely optional.

Once you've read that, we'll create a Hello World program that will say "Hello World" when the command is pasted into the world.

First, we'll include diamond lang, so that we can create a command.

require 'diamond-lang' # Requires DiamondLang

Next, we'll create our command. The name of your command should have no spaces, and the start of each word should be capitalized. So, we'll name our "Hello World" command "HelloWorld". It should also extend (<) DiamondLang::OneCommand.

require 'diamond-lang'
class HelloWorld < DiamondLang::OneCommand
end

To run a command at setup, create a #setup method:

require 'diamond-lang'
class HelloWorld < DiamondLang::OneCommand
  def setup(c)

  end
end

We're asking for the variable c, which is our command block chain. To attach a command, we call it as if it was a method on c:

...
def setup(c):
  c.tell 'penne12', 'it worked!' #=> 'tell penne12 it worked!'
end
...

At the end of the code you wrote, run {YourCommandName}.create

require 'diamond-lang'
class HelloWorld < DiamondLang::OneCommand
  def setup(c)
    c.tell 'penne12', 'it worked!' #=> 'tell penne12 it worked!'
  end
end
HelloWorld.create

to run your code

---

#Helpers To make your life easier, we implemented these features to mimic parts of Minecraft, and commonly used idioms:

##Crafting Yes! Custom crafting! There's an full example in examples/custom_crafting.rb. It also works perfectly with more then one one command creation in the world using crafting, and the same tables can be used for different recipes from different commands!

###Tutorial Let's make name tags craftable by putting string in the top right corner, and paper in the middle and the bottom left corner.

First, call #add_crafting with an empty array:

add_crafting([])

Now, to add a recipe, set the pattern as a 9 character string. Use spaces for blank areas, and letters for items.

add_crafting([{
  pattern:  "  s"+
            " p "+
            "p  "
}])

Now, set the result using the same syntax:

add_crafting([{
  pattern:  "  s"+
            " p "+
            "p  ",
  result: "   "+
          " n "+
          "   "
}])

Now, map the letters to items (as stored in Dropper NBT). Each letter must equal an item, and cannot equal 2 items. 'A' != 'a'

add_crafting([
  {
    pattern:  "  s"+
              " p "+
              "p  ",
    result: "   "+
            " n "+
            "   ",
    n: 'id:"minecraft:name_tag",Count:1b',
    s: 'id:"minecraft:string",Count:1b',
    p: 'id:"minecraft:paper",Count:1b'
  }
])

And you're done.

To get the custom crafting table:

1. Create a plus-shape of crafting tables on the ground
2. Fill in the corners with stone
3. Stand on the middle crafting table
4. Click the underlined "Crafting Table" in chat when asked.
5. Use the dropper, and enjoy your recipe.

##Commands Commands are attached to a chain (c), and arguments are separated with commas (,):

###Examples:

c.say "hi" #=> say hi
c.tell "penne12", "it works!" #=> tell penne12 it works

##Selectors Entity/Player selectors are created with #s, and can be used as arguments in commands:

###Examples:

s(:p) #=> @p
s(:a) #=> @a (etc)
s(a: {r: 1}) #=> @a[r=1]
s(p: {c: 2}) #=> @p[c=2]
s(p: {x: 5, y: 64, z: 5}) #=> @p[x=5,y=64,z=5]

##Coordinates: Coordinates can be created with #coords:

###Examples:

coords(4, 5, 6) #=> x: 4, y: 5, z: 6
coords('~', '~5', '~') #=> x: ~0, y: 5, z: ~0

You can also get a coordinate:

coords(4, 5, 6).z #=> DiamondLang::Helpers::Coordinate(z: 6)
coords(4, 5, 6).y #=> DiamondLang::Helpers::Coordinate(y: 5)
coords(4, 5, 6).x #=> DiamondLang::Helpers::Coordinate(x: 4)

test = coords(4, 5, 6) #=> coords(4, 5, 6)
text.x + 5 #=> 9
test #=> coords(9, 5, 6)

##Coordinate: A single coordinate on the x, y, or z axis.

You can run + or -, which adds/substracts to the coordinate respectively.

###Examples:

DiamondLang::Helpers::Coordinate(:x, 6) #=> x: 3
DiamondLang::Helpers::Coordinate(:x, 6) + 5 #=> 11
#=> Command Block: 						test_for @a[r=10]
#=> Chained conditional command block: 	tell @a[r=10] hello

##Conditions: To make commands run on success, attach a block:

c.test_for s(a: {r: 10}) do |c|
  c.tell s(a: {r: 10}), 'hello'
end
#=> Command Block: 						test_for @a[r=10]
#=> Chained conditional command block: 	tell @a[r=10] hello

##Plain Ruby: Diamond Lang is just a Ruby framework, so you can have awesome things, like variables:

close_players = s(a: {r: 10})
c.test_for close_players do |c|
  c.tell close_players, 'hello'
end #=> @a[r=10]

string interpolation:

c.tell penne12: "2 + 2 is #{2 + 2}" #=> tell penne12 2 + 2 is 4

loops to ease the creation of commands:

(5..10).each do |number|
  c.tell 'penne12', number
end #=> tell penne12 5, tell penne12 6, tell penne12 7, tell penne12 8, tell penne12 9, tell penne12 10

and more.