objd 0.0.10

objd is a Object Oriented framework for Building Minecraft Datapacks with ease

objD

Objective Builder Just for Datapacks

objD is a framework for developing Datapacks for Minecraft. It uses the Dart programming language.

Why a framework?

A framework is a set of utilities to reduce the amount of repetitive work. I've tried many ways in the past to achieve a quick and easy way to generate Datapacks for Minecraft: A own programming language mcscript, several graphical online generators at stevertus.com or premade utilities.

Instead of developing a language, why not using the tools and parser an other language gives you? By building a custom frame around it you get the reliability and the extensive debugging tools in Editors.

The generation of Datapacks is easy,fast and aims to be less repetitive and modular by utilizing the concept of Widgets as one of the main features.

Installation

[Temporary]

You need the Dart SDK for this framework. Download and install it from https://www.dartlang.org/tools/sdk

I would also recommend Visual Studio Code along with the dart plugin to edit dart files very conveniently.

Make a new folder that will house your project wherever you want(I would recommend datapacks folder).

And inside of that create a file named pubspec.yaml and another folder called lib.

Open the pubspec.yaml file and add

dependencies:  
   objd: ^0.0.10

And run

$  pub get

with the console in the new folder(VS code does this automatically)

Getting started

Let's get started and create our first dart file with lib/main.dart file.

Then we import the framework with:

import 'package:objd/core.dart';b

Then we need to create a new datapack project:

void main(){
	createProject(
		Project(
			name:"This is going to be the generated folder name",
			target:"./", // path for where to generate the project
			generate: CustomWidget() // The starting point of generation
		)
	);
}

Next of we need to build this custom Widget:

class CustomWidget extends Widget {
	@override
	Widget generate(Context context){
		
	}
}

To get more details on why we build it like that, check out the Widget documentation.

Like we can see the generate method, which is called on build, has to return another Widget, in our case an instance of the Pack class.

Widget generate(Context context){
	return Pack(
		name:"mypack",
		main: File( // optional
			path: 'main'
		)
	)
}

What we are doing right now is to generate a new subpack with a name(This will be the namespace of your functions later) and a main file(runs every tick) with the name "main.mcfunction".

You can run the project already and the result should be a pack with an empty main.mcfunction file.

So lets add some functionality to our project in our main file.

main: File(
	path: 'main',
	child: Log('Hello World')
)

But how to add a list of Actions then? Well there's also an Widget for that: For.of

child: For.of(List<Widget>[
	Log('Hello World'),
	Command('setblock 0 0 0 air')
])

So now we have a List of Widget, so we can use as many as we want

Widget

A widget is the base element for basically everything in objD.

property
generate(Context)	returns the underlying Widget Tree
toMap()	Similar to toString, but returns a Map tree of the child in generate

Example: We can use an Widget to get or build functionality. e.g

// building our own widget:
class CustomCommand extends Widget {
	@override
	Widget generate(Context context){
		// using an existing widget
		return Command('custom')
	}
}

Context

Maybe you already wondered what this context argument here is:

Widget generate(Context context){

The Context is a way to get certain important information from the parents.

properties
packId	String of the current pack's name
file	the current file name
loadFile	the filename of your load file
mainFile	the filename of your main file
prefixes	a List of Strings that should be added in front of actions(mainly used by Groups)

You can use this context to build more modular Widgets and don't need to hardcode certain files and the pack id:

class LoadWidget extends Widget {
	@override
	Widget generate(Context context){
		return Command('function ' + context.packId + ":" + context.loadFile)
	}
}

Project

The project is a special Widget which is just defined once. It contains some built options, like description or name, but also the entire underlying tree of packs, files and actions.

constructor
name	the name of the datapack folder
generate	a widget that defines the projects content
[description]	A description that will go in pack.mcmeta

Example:

main() {
// create Project takes in one project and compiles it
createProject(
	Project(
	name:  "tested",
	generate:  mainWidget(),
	));
}

Pack

A pack is logically the next step. This defines a sub-pack with an name again that will be our namespace afterwards. Here we can also define included files as well as the main and load function:

constructor
name	the name of the sub-pack
[main]	the main file that is ran every tick
[load]	the load file that is ran on reload
[files]	A List of type File witch includes other needed files

Example:

Pack(
	name:"tpcraft",
	main: File(...),
	load: File(...),
	files: List<File> [
		File(...)
	]
)

The Pack class can be used as often as you want and where you want, so you can also define a new pack in some file.

Notice: The namespace of the pack is accessible in these files by using the context variable. e.g: Command("function" + context.packId + ":run")

File

The Pack class already required some files. The file class simply generates a new mcfunction file with content and a path.

The File constructor has two required arguments:

constructor
path	the desired file path going from /data/:packId:/functions/ on
child	the content of the file
[execute]	Boolean if the function should be executed directly

The File class can be used as often as you want and where you want, so you can also define a new file in a For container for example. Example:

Pack(
	name:"tpcraft",
	main: File(
		path:"main",
		// and defining a new file inside of an widget
		child: File.execute( // same as execute: true
			path: 'new'
			child: Command(...)
		)
	),
)

Extend

Extend is very similar to File, but instead of creating a new file it adds content to an existing file.

constructor
String	the desired file path going from /data/:packId:/functions/ on
child	the additional content
[first]	Boolean if the content should be added in front of the original(def. false)

So lets say we already have some files in our pack, but want to add something to the main file somewhere entirely else in our project:

Extend(
	"main",
	child: Command("say okay"),
	first: true
)

This would add the command say okay in front of our main.mcfunction.

Command

A Command is a raw action, that is executed by Minecraft directly.

constructor
String	the raw command in the format "/command" or "command"

Example:

// using a command in a file:
File(
	path:"command",
	child: Command('/say hey')
)
// uses the say command in command.mcfunction:
say hey

For

The For class enables you to add multiple endpoints to one Widget.

There is always a List of Widgets involved.

constructor
to	the ending index including itself
create	a function returning a Widget based on the index argument
[from]	the starting index(default 0)
[step ]	the value used in each iteration to increases the index(default 1)

So the basic for class utilizes a loop from a value to another value:

File(
	path:"for",
	child: For(
		from: 0,
		to: 5,
		create: (index){
			return Command('/say ' + index.toString())
		}
	)
)
// results in:
say 0
say 1
say 2
say 3
say 4
say 5

There is also an other Constructor for looping through a given list of widgets:

For.of
List of Widgets	loops through each of these Widgets

Example:

File(
	path:"for_of",
	child: For.of(List<Widget>[
		Command('say 1'),
		Command('say 2'),
		Command('say 3')
	]),
)
// results in:
say 1
say 2
say 3

CommandList

But there is a more efficient way to list raw Minecraft commands. The CommandList Widget allows you to input a List of Commands, a List of Strings representing a command or a multiline string.

constructor
List	a list of commands or strings

This has basically the same function as For.of just for commands.

CommandList(List<Command>[
		Command('say 1'),
		Command('say 2'),
		Command('say 3')
]),

But there is also a subset which accepts one big multiline string:

CommandList.str
String	list of commands each on a seperate line

CommandList.str("""
	/say 1
	/say 2
	/say 3
"""),

The slashes are automatically filtered out.

Group

The group groups actions similar to for but has an option to prefix each action and encapsulate the content in a new file.

constructor
prefix	a prefix type of String
children	the underlying widgets
[filename]	the targeted filename(will be combined with an unique id)
[groupMin]	the minimum amount of children to encapsulate(default = 3, set to -1 to disable)

If the children length is larger or equal groupMin a new file is created in /objD/(the working directory for objectiveD) and executed.

Group(
	prefix: "execute as @e run "
	children: List<Widget>[
		Command('say 1'),
		Command('say 2'),
		Command('say 3')
	],
	filename: "asgroup",
	groupMin: 2
),

Entity

constructor	arguments are optional
selector	the entity selector(e.g p,s,e or r)
limit	number of matched entities
type	EntityType, id of the entity
area	A List of two Locations marking an area where the entity should be
distance	Range to the entity
level	Range of experience levels
gamemode	Gamemode type(e.g Gamemode.creative, Gamemode.survival)
horizontalRotation	Range of the horizontal facing direction
verticalRotation	Range of the vertical facing direction
playerName	a String if you prefer to use a playername instead of arguments
Methods
sort	adds a sort attribute of type Sort
storeResult	Command, path, useSuccess

storeResult stores a result or success of a command in the nbt path of an entity. Example:

Entity.Selected().storeResult(
	Command('say hello'),
	path: "Invisisble",
	useSuccess:true
)

⇒ execute store success entity @s Invisisble run say hello

Sort
Sort.random
Sort.furthest
Sort.nearest
Sort.albitrary

The Range class defines a range of values(e.g 3..10 in vanilla)

Range
[to]	Number for the maximum range
[from]	Number for the minimal range

EntityType
String	String representation of the type

There is also an EntityType for every type_id in minecraft with EntityType.[type_id]

Say(
	entity: Entity(
		selector: "e",
		limit: 1,
		type: EntityType.armor_stand,
		distance: Range(to:2),
		area: [
			// use null for a unlimited selection
			Location.glob(x: -10,y: null,z: -10), 
			Location.glob(x: 10, y: null, z: 10)
			// it also automatically calcs the distance between these
		]
		level: Range(from: 1),
		gamemode: Gamemode.creative,
		horizontalRotation: Range(from:1),
		verticalRotation: Range(from: 20, to: 80),
	).sort(Sort.random)
)

⇒ say @e[limit=1,type=armor_stand,distance=..2,x=-10,z=-10,dx=20,dz=20,level=1..,gamemode=creative,y_rotation=1..,x_rotation=20..80,sort=random]

specific constructors
Entity.Selected(...)	creates an entity with @s
Entity.Player(...)	creates an entity with @p
Entity.PlayerName(String)	creates an entity with an implicit name
Entity.All(...)	creates an entity with @a
Entity.Random(...)	creates an entity with @r

Scoreboard

A scoreboard objective holds values, kind a like a Variable inside Minecraft. The Scoreboard class just handles adding or removing objectives. The value assignment is handled by the Score class.

constructor
String	name of the objective(required)
type	the objective type (default = dummy)
display	TextComponent that displays the name
addIntoLoad	bool whether the scoreboard should be added into your load file(default = true)

objD automatically keeps a list of all scoreboards and inserts them into the given load file, ignoring doubled names. Example:

Scoreboard(
"death_count",
type: "deathCount",
display: TextComponent("This is how many deaths you have:"),
addIntoLoad: true
)
Scoreboard("death_count")

// load.mcfunction:
/scoreboard objectives add death_count deathCount [{"text":"This is how many deaths you have:"}]

So the second scoreboard was not added because one "death_count" already existed.

The Scoreboard.add constructor does exactly the same but puts the result without checking in the current file.

Scoreboard.remove removes an objective by its name again.

With Scoreboard.setdisplay you can display the values:

Scoreboard.setdisplay
String	name of the objective(required)
display	String for display location (default = sidebar)

Score

The score class is the basis for setting values, calculating with scores and checking the values. It implements one base class with no functionality and several methods to do actions:

constructor
Entity	the entity within the scoreboard
String	the name of the objective
addNew	bool whether it should add the scoreboard itself if it does not exist(default = true)

With the addNew property it is not required to add a scoreboard before!

Calculations

These methods can be used to set or calculate the value:

name	arguments
set	int
reset
add	int
subtract	int
	The following compare another Score
setEqual	Score
swapWith	Score
setToSmallest	Score
setToBiggest	Score
addScore	Score
subtractScore	Score
multiplyByScore	Score
divideByScore	Score
modulo	Score
setToData	Data
setToResult	Command,useSuccess(bool)

All of these methods return a new instance of Score with the calculations applied. So you can also chain single calculations or use multiple on one base Score.

Examples:

// defining scores variables inside the widget
Score base = Score(Entity.Selected(),"score",addNew: true)
Score another = Score(Entity.Selected(),"score2")
// ... in the generate method:
base.set(5).add(3).subtract(10).reset()
⇒ scoreboard players set @s score 5
⇒ scoreboard players add @s score 3
⇒ scoreboard players remove @s score 10
⇒ scoreboard players reset @s score

base.setEqual(another).swapWith(another).setToBiggest(another)
⇒ scoreboard players operation @s score = @s score2
⇒ scoreboard players operation @s score >< @s score2
⇒ scoreboard players operation @s score > @s score2

another.addScore(base).divideByScore(base).modulo(base)
⇒ scoreboard players operation @s score2 += @s score
⇒ scoreboard players operation @s score2 /= @s score
⇒ scoreboard players operation @s score2 %= @s score

// setToData must take in Data.get 
base.setToData(Data.get(Location("~ ~ ~"),"Items[0].Count"))
⇒ execute store result score @s score run data get block ~ ~ ~ Items[0].Count 1

// using success instead of result
base.setToResult(Command("say hi"),useSuccess:true) 
⇒ execute store success score @s score run say hi

Conditions

These methods can be used for example with if to match values:

name	arguments	example Result
matches	int	@s score matches 5
matchesRange	Range	@s score matches 0..20
isEqual	Score	@s score = @s score2
isSmaller	Score	@s score < @s score2
isSmallerOrEqual	Score	@s score <= @s score2
isBigger	Score	@s score > @s score2
isBiggerOrEqual	Score	@s score >= @s score2

Block

There is also a util class called Block which provides a wrapper for all available blocks in Minecraft. Usage:

Block([minecraft_block_id]) // as string or
Block.[minecraft_block_id]

All ids can be found here. But you can also insert a block by its string:

constructor
String	the minecraft block id

Example:

SetBlock(
	Block.stone,
	location: Location.here()
)

Location

In the block example we already used a class called Location. This translates into Minecraft Coordinates.

constructor
String	the minecraft coordinate string(e.g "~ ~ ~")

SetBlock(Block.stone,location: Location("~ 5 ~"))

There is also a shortcut for " ~ ~ ~ ":

Location.here	Selects the current Position

Location.here()
⇒ ~ ~ ~

But the Location class also provides a wrapper for global coordinates:

Location.glob
x	a double defining the absolute x coordinate
y	a double defining the absolute y coordinate
z	a double defining the absolute z coordinate

Location.glob(x: 5,y: 51.5,z: 784.20) 
⇒ 5 51.5 784.2

And also for relative coordinates:

Location.rel
x	a double defining the relative x coordinate
y	a double defining the relative y coordinate
z	a double defining the relative z coordinate

Location.rel(x: 5,y: 1.5,z: 0)
⇒ ~5 ~1.5 ~

And local coordinates(depends on the rotation of the head):

Location.local
x	a double defining the local x coordinate
y	a double defining the local y coordinate
z	a double defining the local z coordinate

Location.local(x: 0,y: 1,z: 2.5)
⇒ ^ ^1 ^2.5

There is also a method for a location:

methods
storeResult	Command, path, useSuccess
This stores a result or success of a command in the nbt path of a location.
Example:

Location.here().storeResult(Command('say hello'),path: "Items[0].tag.command",useSuccess:true)

⇒ execute store success block ~ ~ ~ Items[0].tag.command run say hello

Area

The Area class provides a way to select a three dimensional space between some locations. Therefore it automatically builds the lowest and highest coordinates and calculates the distances.

constructor	doubles
x1	one x corner
y1	one y corner
z1	one z corner
x2	second x corner
y2	second x corner
z2	second x corner
This is especially useful for if blocks, Fill and Clone.

Example:

Area(x1: 100, y1: -15.75, z1: 0, x2: 2, y1: 10, z2: -10)
⇒ 2 -15.75 -10 100 10 0

But if you would also like local or relative coordinates, you can always pass the locations directly:

Area.fromLocations
Location	location 1
Location	location 2

Rotation

The Rotation class is very similar to Location but takes in just two directions for an entities rotation:

constructor
String	the minecraft coordinate string(e.g "~ ~")

Rotation.glob
x	int representing global x orientation
y	int representing global y orientation

Rotation.rel
x	int representing rotation relative to the current x orientation
y	int representing rotation relative to the current y orientation

Example:

Rotation.rel(x: 90,y: 180)
⇒ ~90 ~180

Execute.rotated(Rotation.glob(x:0,y:90),children:[
	Command("tp @s ^ ^ ^10")
])
⇒ execute rotated 0 90 run command tp @s ^ ^ ^10

Data

The Data Widgets allows you to edit nbt data of Entities or Blocks.

constructor
dynamic	The target Entity OR Block which you want to modify
nbt	A Dart Map containing new nbt data
type	A String defining the operation type(default=merge)

Example:

Data(
	Entity.Selected(),
	nbt: {
		"Invisible":1,
		"NoGravity":1
	}
)
⇒ data merge entity @s {"Invisible":1,"NoGravity":1}

There are also subconstructors for each operation type(Data.merge, Data.get, Data.remove)

And the modify operation is also available, yet a bit more complex:

Data.modify
dynamic	The target Entity OR Location which you want to modify
path	the nbt path you want to modify
modify	A DataModify object defining which parameters you want to modify

So this is split up into a seperate class: DataModify There are five sub operations again: set, merge, prepend, append and insert. All follow this constructor rules:

DataModify
dynamic	The source of the modification. Can be a Map, String, Number, Entity or Location
fromPath	optional path for the Entity or Location source from where to read the data

So we can for Example use

Data.modify(
	Entity.Selected(),
	path: "my_Custom_Path",
	modify: DataModify.set(
		"hey" // or {"nbt":"here"} or 56
	),
)
⇒ data modify @s my_Custom_Path set value "hey"

Or So we can for Example use

Data.modify(
	Entity.Selected(),
	path: "my_Custom_Path2",
	modify: DataModify.insert(
		Entity.Selected(), // or Location... to get data from a block
		index: 2, // insert also needs an additional index
		fromPath: "my_Custom_Path"
	),
)
// this just copies one property to another
⇒ data modify @s my_Custom_Path2 insert from entity @s my_Custom_Path

A handy shortcut for that is the Data.copy constructor, which just copies a property from one path to another:

Data.copy
dynamic	The target Entity OR Location which you want to modify
path	the nbt path you want to copy to
from	The source Entity OR Block
fromPath	The source nbt path

Data.copy(
	Entity.Selected(),
	path: "my_Custom_Path2",
	from: Location("~ ~-1 ~"),
	fromPath: "Items[0].tag.display.name"
)
⇒ data modify @s my_Custom_Path2 set from block ~ ~-1 ~ Items[0].tag.display.name

Item

The Item class represents an item in an inventory in Minecraft. It is used in the Give or Nbt Commands.

This Class is incomplete, more functionality soon...

constructor
ItemType | Block | String	the type of item(required, see example)
count	Integer value for the amount of stacked items
slot	The current slot of the item(does not work for give)
damage	the used durability of the item
model	int describing which model varient should be used
nbt	addional NBT as Dart Map

Example:

Give(Entity.Selected(),
	item: Item(
		ItemType.iron_axe, // OR Block.stone OR "whatever id"
		count: 5,
		damage: 40,
		model: 3390001,
		nbt: {
			"customNBT":1
		}
	)
)

⇒ give @s minecraft:iron_axe{"customNBT":1,"Damage":40,"CustomModelData":3390001} 5

ItemType is like EntityType or Block a utility class to provide a list of all available items.

ItemType([minecraft_item_id])	creates a ItemType from a String
ItemType.[minecraft_item_id]	there is also an value for each item in Minecraft

Command Wrappers

In this section are a few classes that build commands with inputs(Entities, Texts, Blocks, Locations).

Comment

The Comment widget generates a simple line with some annotations(# ...). It also features a simple line break: Example:

Comment("hello world")
⇒ # hello world
Comment.LineBreak()
⇒ 

Execute

One of the most used commands has a widget too. The execute command has multiple syntaxes that allow to manipulate the position, executer or condition.

constructor
children	a List of children that should be executed(required)
encapsulate	weither the children should be in an extra file for a certain length
as	an Entity that runs the commands
at	an Entity from where the command should run
If	a Condition that must be true to execute the commands
location	a Location or Entity from where to run the commands
align	String with align statements e.g: "xyz"
anchor	either Facing.eyes or Facing.feet
facing	A Location or Entity to rotate to
rotation	A rotation of type Rotation
dimension	Dimension of overworld, the_end or the_nether

All Execute classes are also an Group, so they will group commands in seperate files and allow multiple children. Example:

Execute(
	as: Entity.player(),
	at: Entity.Selected(),
	If: Condition.entity(Entity())
	location: Location.here(),
	align: "yz",
	anchor: Facing.eyes,
	facing: Location().glob(x:0,y:0,z:0)
	rotation: Rotation.rel(x:10,y:20),
	dimension: Dimension.the_nether
	children: List<Widget> [
		Command("/say I get executed")
		Say(msg:"Me too")
	]
),

⇒ execute as @p at @s if entity @e positioned ~ ~ ~ align yz anchored eyes facing 0 0 0 rotated ~10 ~20 in the_nether run say I get executed
  execute as @p at @s if entity @e positioned ~ ~ ~ align yz anchored eyes facing 0 0 0 rotated ~10 ~20 in the_nether run say Me too

Execute. as
Entity	the entity from which the children should run
children	a List of children that should be executed
[encapsulate]	same as base

This is just a different notation for Execute.

Execute.as(
	Entity.player(),
	children: List<Widget> [
		Command("/say I get executed")
	]
),

⇒ execute as @p run say I get executed

Execute. at
Entity	the entity from where the children should run
children	a List of children that should be executed
[encapsulate]	same as base

Execute.at(
	Entity.player(),
	children: List<Widget> [
		Command("/say I get executed")
	]
),

⇒ execute at @p run say I get executed

Execute.asat
Entity	the entity from which and where the children should run
children	a List of children that should be executed
[encapsulate]	same as base

Asat combines as and at to just one entity.

Execute.asat(
	Entity.player(),
	children: List<Widget> [
		Command("/say I get executed")
	]
),

⇒ execute as @p at @s run say I get executed

Execute.positioned
Entity|Location	the new position
...

Positioned sets the execution point of the command to a new Location or Entity.

Execute.positioned(
	Entity.player(), // Location...
	children: List<Widget> [
		Command("/say I get executed")
	]
),

⇒ execute positioned as @p run say I get executed

Execute.align
String	representation of the alignment
...

Aligns the position to the corners of the block grid.

Execute.anchored
Facing	Facing.eyes or Facing.feet
...

Sets the execution position(^ ^ ^) to the eyes or the feet.

Execute.facing
Entity or Location	the target to face(required)
facing	either face the Facing.eyes(default) or Facing.feet
...

Sets the execution rotation so that it faces a location or an entity's feet or eyes. Example:

Execute.facing(
	Entity.player(), // or Location...
	facing: Facing.feet // optional
	children: List<Widget> [
		Command("/say I get executed")
	]
)
⇒ execute facing entity @p feet run say I get executed

Execute.rotated
Rotation	the rotation object
...

Sets the execution rotation to the given rotation.

Execute.dimension
Dimension	the given dimension type
...

Sets the execution dimension(execute in) to either Dimension.overworld, Dimension.the_end or Dimension.the_nether.

Methods

All of these constructors are also available as methods with some additional utils:

Methods
center	centeres the alignment(middle of the block)

That means you can chain the actions, like with score, and use multiple actions at once:

// declaring the base
Execute ex = Execute(
	children:[
		Say(msg:"Hello"),
		Command("say e")
	]
)
// in the generate method:
ex.asat(
Entity.All())
	.center()
	.positioned(Location.rel(x:0,y:20,z:0))
⇒ execute as @a at @s align xyz positioned ~0.5 ~0.5 ~0.5 positioned ~ ~20 ~ run say Hello
   execute as @a at @s align xyz positioned ~0.5 ~0.5 ~0.5 positioned ~ ~20 ~ run say e

If

The if widget accepts a Condition and runs the children if the condition is true. If just gives you an execute wrapper with if and else statements. The conditions have their own class.

constructor
Condition	the condition
Then	a List of Wigets that runs on match
Else	a List of Widget that runs if it does not match(optional)

Example:

If(
	Condition(Entity.Player()),
	Then: [
		Say(msg:"true")
	],
	Else: [
		Say(msg:"false")
	]
)
⇒ execute if entity @p run say true
⇒ execute unless entity @p run say false

Not Final! Will be done with tags later on.

You can also negate the Condition with If.not:

If.not(
	Condition(Entity.Player()),
	Then: [
		Say(msg:"true")
	]
)
⇒ execute unless entity @p run say true

Condition

The Condition class defines conditions for the if widget and more. It can also combines conditions and generates an argument list.

constructor
dynamic	the thing you want to test
Well it is not as easy as it looks. A condition can accept many values and this makes the Condition very complex.

The argument can be a...	and generates e.g
Entity	if entity @s
Score	if score @s objective matches 5	Attention! This needs a score condition method!
Location	unless block ~ ~2 ~ air	Just checks whether a block is present
Condition	if entity @s if block ~ ~ ~ stone	Yes, you can nest Conditions like Widgets and combine them.

Examples:

If(
	Condition(
		Entity.Selected()
	)
	,Then:[Say(msg:'entity')],
)
⇒ execute if entity @s run say entity
If(
	Condition(
		Location.here()
	),
	Then:[Say(msg:'block')],
)
⇒ execute unless block ~ ~ ~ minecraft:air run say block
If.not(
	Condition(
		Score(
			Entity.PlayerName("Stevertus"),
			"objective"
		).matches(10)
	),
	Then:[Say(msg:'score')],
)
⇒ execute unless score Stevertus objective matches 10 run say score

For Score, Block and Entity there is also a named constructor along with:

Condition.blocks
Area	the Area of blocks that you want to compare
compare	the lowest comparison Location of the area of the same size

Condition.block: also requires a block type:

If(
	Condition.block(
		Location.here(),
		block: Block.stone
	),
	Then:[Say(msg:'stone')],
)
⇒ execute if block ~ ~ ~ minecraft:stone run say stone

Condition.not: accepts same dynamic condition types as above but negates them (if ⇒ unless, unless ⇒ if)

Condition.and: accepts a list of dynamic condition types, that all have to be true to trigger:

If(
	Condition.and([
		Location.here(),
		Entity(),
		Condition(...)
	]),
	Then:[Say(msg:'true')],
)
⇒ execute unless block ~ ~ ~ minecraft:air if entity @e if ... run say true

Condition.or: accepts a list of dynamic condition types, but just one has to be true to trigger:

If(
	Condition.or([
		Location.here(),
		Entity(),
		Condition(...)
	]),
	Then:[Say(msg:'true')],
)
⇒ execute unless block ~ ~ ~ minecraft:air run say true
⇒ execute if entity @e run say true
⇒ execute if ... run say true

Just temporary, will be done with tags later...

With this knowledge we can build pretty complex logical conditions:

If.not(
	Condition.and([
		Condition.not(Entity.Player()),
		Condition.or([
			Entity.Random(),
			Condition.blocks(
				Area(x1: 0, y1: 0, z1: 0, x2: 10, y2: 10, z2: 10),
				compare: Location('~ ~ ~'),
			),
			Condition.not(
				Condition.score(
					Score(Entity.Selected(),"test")
					  .matchesRange(Range(from:0,to:5))	
				),
			),
		]),
	]),
	Then: [Say(msg:"I'm done")]
)
⇒ execute unless entity @p if entity @r run say I'm done
⇒ execute unless entity @p if blocks 0 0 0 10 10 10 ~ ~ ~ run say I'm done
⇒ execute unless entity @p unless score @s test matches 0..5 run say I'm done

SetBlock

The SetBlock Command Class sets a Block at the specified location:

constructor
Block	the Block type you want to set
location	where you want to set the block

Example:

SetBlock(
	Block.stone,
	location: Location.glob(
		x: 5,
		y: 0,
		z: 20
	)
)
⇒ setblock 5 0 20 minecraft:stone

Fill

Fill acts similar to setblock, but fills a whole area instead.

constructor
Block	the fill material
area	the Area to fill

Tip: There are also constructors for Fill.destroy, Fill.hollow, Fill.outline and Fill.keep

Example:

Fill(
	Block.dirt,
	area: Area.fromLocations(
		Location.glob(x: 0, y: 0, z: 0),
		Location.glob(x: 10, y: 20, z: 10)
	),
)
⇒ fill 0 0 0 10 20 10 minecraft:dirt

You can also just replace specific other blocks:

Fill.replace
...	Everything the same
replace	the Block type you want to replace

Example:

Fill.replace(
	Block.dirt,
	area: Area.fromLocations(
		Location.glob(x: 0, y: 0, z: 0),
		Location.glob(x: 10, y: 20, z: 10)
	),
	replace: Block.stone,
)
⇒ fill 0 0 0 10 20 10 minecraft:dirt replace minecraft:stone

Say

The Say Class writes a simple message or an entity in the chat.

constructor
msg	Message as String
entity	enity of type Entity

You can't put both parameters in Say!

Example:

Say(
	msg: "Hello"
)
⇒ say Hello
Say(
	entity: Entity.Player()
)
⇒ say @p

Give

Gives a item to a player.

constructor
Entity	The player
item	the Item you want to give(required)

Example:

Give(Entity.Player(),
	item: Item(
		ItemType.apple,
		count: 5
	)
)

⇒ give @s minecraft:apple 5

Replaceitem

Sets a specific container slot to a item.

• for Entities:

constructor
Entity	The entity
item	the Item you want to set(required)
slot	a String representation of the slot(required)

Example:

Replaceitem(Entity.Player(),
	slot: "hotbar.5"
	item: Item(
		ItemType.apple,
		count: 5,
		model: 339001
	)
)

⇒ replaceitem entity @p hotbar.5 minecraft:apple{"CustomModelData":339001} 5 

replaceitem block will follow

Summon

The summon class creates a new entity at a given location.

constructor
EntityType	the type of entity(required)
location	the location as type Location(default Location.here())
name	a TextComponent respresenting the name of the entity
nbt	additional nbt as Map(key-value pairs)

This version is not final, there will be more properties in the future!

Example:

Summon(
	EntityType.armor_stand,
	location: Location.rel(x: 0,y:1,z:0),
	name: TextComponent("this is my name",color: Color.DarkBlue),
	nbt: {"Invisible":1}
)
⇒ summon armor_stand ~ ~1 ~ {"Invisible":1,"CustomName":"{\"text\":\"this is my name\",\"color\":\"dark_blue\"}"}

Teleport

Sets the location of an Entity to a new Location and Rotation(optional).

constructor
Entity	the entity you want to teleport(required)
to	the target Location(required)
facing	a Location or Entity to face
rotation	a Rotation object defining the new rotation

Example:

Teleport(
	Entity.Player(),
	to: Location.glob(x: 5, y: 10, z: 5),
	facing: Location.here()
)
⇒ tp @p 5 10 5 facing ~ ~ ~

And you can also teleport to another entity:

Teleport.entity
Entity	the entity you want to teleport(required)
to	the target entity(required)
facing	a Location or Entity to face

Teleport(
	Entity.Player(),
	to: Entity(name: "target", limit: 1)
)
⇒ tp @p @e[name="target",limit=1]

Texts and Strings

In Minecraft text in the chat or as title is defined with JSON-data. objD makes the JSON part of it easier by utilizing a few classes:

TextComponent
String	the text displayed (required)
color	a the color of the type Color
bold	bool whether it is bold
italic	bool whether it is italic
underlined	bool whether it is underlined
strikethrough	bool whether it is strikethrough
obfuscated	bool whether it is obfuscated
clickEvent	A TextClickEvent to handle left clicks
hoverEvent	A TextHoverEvent to handle mouse overs
insertion	a String witch is inserted into the input if shift left clicked

Puuh, that are a lot of properties, we'll come to Color, TextClickEvent and TextHoverEvent in a bit.

Example

Title(
	Entity.Player(),
	show: [
		TextComponent("Hello",
			color: Color.White,
			bold: true,
			italic:true,
			underlined: true,
			strikethrough: false,
			obfuscated: false,
			clickEvent: TextClickEvent.open_url("https://stevertus.com"),
			hoverEvent: TextHoverEvent.text([TextComponent("hover me")]),
			insertion: "panic"
		)
	]
)
⇒ title @p title [{"text":"Hello","color":"white","bold":true,"italic":true,"underlined":true,"clickEvent":{"action":"open_url","value":"https://stevertus.com"},"hoverEvent":{"action":"text","value":[{text:"hover me"}]}}]

Now, its up to you to decide which is easier to read. There are also some other data sources: TODO: new 1.14 types!

TextComponent.translate
String	the translate key (required)
conversionFlags	a List of strings that replace placeholder values(e.g $s)
...same properties...	from TextComponent

TextComponent.score
Entity	the entity with the score(required)
objective	Name of the Scoreboard Objective(required)
...same properties...	from TextComponent

TextComponent.score(
	Entity.Selected(),
	objective: "myscores",
	color:Color.Black
)
⇒ {"score":{"name": "@s","objective":"myscores"},"color":"black"}

TextComponent.selector
Entity	the entity whose name you want to display(required)
...same properties...	from TextComponent

TextComponent.selector(
	Entity(name:"hello"),
	color:Color.Black
)
⇒ {"selector":"@e[name=hello]","color":"black"}

Colors

Color([color_name])	or
Color.[color_name]	Uppercase!

See all available colors: https://minecraft.gamepedia.com/Formatting_codes#Color_codes

Examples:

Color.Black,
Color.DarkPurple
Color("gold")
Color('dark_green')

TextClickEvent

Fires on left click, Part of TextComponent.

constructors
TextClickEvent.open_url(String)	Opens the specified web url
TextClickEvent.run_command(Command)	runs the command
TextClickEvent.suggest(Command)	puts the command in the chat input
TextClickEvent.change_page(int)	turns a books page to the value(just Books!)

TextHoverEvent

Fires on mouse over, Part of TextComponent.

constructors
TextClickEvent.text(List<TextComponent>)	Accepts a new List of TextComponents to display
TextClickEvent.achievement(String)	shows achievement
TextClickEvent.item(Item)	shows item
TextClickEvent.entity(String,String,String)	displays a dummy entity with name, type and UUID(in this order))

Title

To display our TextComponent, we need the /title command and the Title class wrapper.

constructor
selector	the Entity for the title to show
show	A List of TextComponents to show

Example

Title(
	Entity.Player(),
	show: List<TextComponent>[
		TextComponent(
			"hey",
			color: Color.Black
		)
	]
)
⇒ title @p title [{"text":"hey","color":"black"}]

The same goes also for subtitle and actionbar:

Title.subtitle or Title.actionbar
selector	the Entity for the title to show
show	A List of TextComponents to show

Title.clear clears all titles again:

Title.clear
selector	clears title for the selector

Title.times sets the timings

Title.times
selector	edit the durations for this selector
fadein	the fadein time in ticks(default 20)
display	the time the title stays in ticks(default 60)
fadeout	the fadeout time in ticks(default 20)

And also a resetter for that:

Title.resetTimes
selector	resets times for this selector

Examples:

Title.actionbar(
	Entity.All(),
	show: [
		TextComponent("hey")
	]
)
⇒ title @a actionbar [{"text":"hey"}]
Title.clear(Entity())
⇒ title @e clear

Title.times(Entity.All(),fadein:30,display:40,fadeout:20)
⇒ title @a times 30 40 20

Title.resetTimes(Entity.All())
⇒ title @a reset

Tellraw

The Tellraw class is very similar to the Title class, but shows its texts in the chat:

constructor
selector	the Entity for the text to show
show	A List of TextComponents to show

Example

Tellraw(
	Entity.Player(),
	show: List<TextComponent>[
		TextComponent(
			"hey",
			color: Color.Black
		)
	]
)
⇒ tellraw @p [{"text":"hey","color":"black"}]