Richtlinien Dokumentation schreiben

The Godot community is rich and international. Users come from all around the world. Some of them are young, and many aren’t native English speakers. That’s why we must all write using a clear and a common language. For the class reference, the goal is to make it easy to read for everyone and precise.

In summary, always try to:

  1. Use the direct voice
  2. Use precise action verbs
  3. Avoid verbs that end in -ing
  4. Remove unnecessary adverbs and adjectives.
  5. Ban these 8 words: obvious, simple, basic, easy, actual, just, clear, and however
  6. Use explicit references
  7. Use ‚s to show possession
  8. Use the Oxford comma

There are 3 rules to describe classes:

  1. Give an overview of the node in the brief description
  2. Mention what methods return if it’s useful
  3. Use „if true“ to describe booleans

Bemerkung

A technical writer’s job is to pack as much information as possible into the smallest and clearest sentences possible. These guidelines will help you work towards that goal.

7 rules for a clear english

Use the direct voice

Use the direct voice when possible. Take the classes, methods, and constants you describe as the subject. It’s natural to write using the passive voice, but it’s harder to read and produces longer sentences.

Passive:

The man **was bitten** by the dog.

Active:

The dog bit the man.

Don’t use the passive voice:

void edit_set_pivot ( Vector2 pivot )
[...] This method **is implemented** only in some nodes that inherit Node2D.

Do use the node’s name as a noun:

void edit_set_pivot ( Vector2 pivot )
[...] Only some Node2Ds **implement** this method.

Use precise action verbs

Favor precise yet common verbs over generic ones like make, set, and any expression you can replace with a single word.

Don’t repeat the method’s name. It already states it sets the pivot value to a new one:

void edit_set_pivot ( Vector2 pivot )
Set the pivot position of the 2D node to [code]pivot[/code] value. [...]

Do explain what’s the consequence of this „set“: use precise verbs like place, position, rotate, fade, etc.

void edit_set_pivot ( Vector2 pivot )
Position the node's pivot to the [code]pivot[/code] value. [...]

Avoid verbs that end in -ing

The progressive forms describe continuous actions. E.g. „is calling“, „is moving“.

Don’t use the progressive form for instant changes.

Vector2 move ( Vector2 rel_vec )
Move the body in the given direction, **stopping** if there is an obstacle. [...]

Do use simple present, preterit or future.

Vector2 move ( Vector2 rel_vec )
Moves the body in the vector's direction. The body **stops** if it collides with an obstacle. [...]

You may use the progressive tense to describe actions that are continuous in time. Anything like animation or coroutines.

Tipp

Verbs can turn into adjectival nouns with -ing. This is not a conjugation, so you may use them: the remaining movement, the missing file, etc.

Remove unnecessary adverbs and adjectives

Write as few adjectives and adverbs as possible. Only use them if they add key information to the description.

Don’t use redundant or meaningless adverbs. Words that lengthen the documentation but don’t add any information:

**Basically** a big texture [...]

Do write short sentences in a simple, descriptive language:

A big texture [...]

Ban these 8 words

Don’t ever use these 8 banned words:

  1. obvious
  2. simple
  3. basic
  4. easy
  5. actual
  6. just
  7. clear
  8. however (some uses)

Game creation and programming aren’t simple, and nothing’s easy to someone learning to use the API for the first time. Other words in the list, like just or actual won’t add any info to the sentence. Don’t use corresponding adverbs either: obviously, simply, basically, easily, actually, clearly.

Don’t example. The banned words lengthen the description and take attention away from the most important info:

**TextureRect**
Control frame that **simply** draws an assigned texture. It can stretch or not. It's a **simple** way to **just** show an image in a UI.

Do remove them:

**TextureRect**
[Control] node that displays a texture. The texture can stretch to the node's bounding box or stay in the center. Useful to display sprites in your UIs.

„Simple“ never helps. Remember, for other users, anything could be complex or frustrate them. There’s nothing like a good old it’s simple to make you cringe. Here’s the old brief description, the first sentence on the Timer node’s page:

**Timer**
A **simple** Timer node.

Do explain what the node does instead:

**Timer**
Calls a function of your choice after a certain duration.

Don’t use „basic“, it is too vague:

**Vector3**
Vector class, which performs **basic** 3D vector math operations.

Do use the brief description to offer an overview of the node:

**Vector3**
Provides essential math functions to manipulate 3D vectors: cross product, normalize, rotate, etc.

Use explicit references

Favor explicit references over implicit ones.

Don’t use words like „the former“, „the latter“, etc. They’re not the most common in English, and they require you to check the reference.

[code]w[/code] and [code]h[/code] define right and bottom margins. The **latter** two resize the texture so it fits in the defined margin.

Do repeat words. They remove all ambiguity:

[code]w[/code] and [code]h[/code] define right and bottom margins. **[code]w[/code] and [code]h[/code]** resize the texture so it fits the margin.

If you need to repeat the same variable name 3 or 4 times, you probably need to rephrase your description.

Use ‚s to show possession

Avoid „The milk of the cow“. It feels unnatural in English. Write „The cow’s milk“ instead.

Don’t write „of the X“:

The region **of the AtlasTexture that is** used.

Do use 's. It lets you put the main subject at the start of the sentence, and keep it short:

The **AtlasTexture's** used region.

Use the Oxford comma to enumerate anything

From the Oxford dictionary:

The ‚Oxford comma‘ is an optional comma before the word ‚and‘ at the end of a list: We sell books, videos, and magazines.

[…] Not all writers and publishers use it, but it can clarify the meaning of a sentence when the items in a list are not single words: These items are available in black and white, red and yellow, and blue and green.

Don’t leave the last element of a list without a comma:

Create a KinematicBody2D node, a CollisionShape2D node and a sprite node.

Do add a comma before and or or, for the last element of a list with more than two elements.

Create a KinematicBody2D node, a CollisionShape2D node, and a sprite node.

How to write methods and classes

Dynamic vs static typing

The code examples in the documentation should follow a consistent style not to confuse users. As static type hints are an optional feature of GDScript, we chose to stick to writing dynamic code. This leads to writing GDScript that is concise and accessible.

The exception is topics that explain static typing concepts to users.

Don’t add a type hint with a colon or by casting:

const MainAttack := preload("res://fire_attack.gd")
var hit_points := 5
var name: String = "Bob"
var body_sprite := $Sprite as Sprite

Do write constants variables with dynamic typing:

const MainAttack = preload("res://fire_attack.gd")
var hit_points = 5
var name = "Bob"
var body_sprite = $Sprite

Don’t write functions with inferred arguments or return types:

func choose(arguments: Array):
    # Chooses one of the arguments from array with equal chances
    randomize()
    var size := arguments.size()
    var choice: int = randi() % size
    return arguments[choice]

Do write functions using dynamic typing:

func choose(arguments):
    # Chooses one of the arguments from array with equal chances
    randomize()
    var size = arguments.size()
    var choice = randi() % size
    return arguments[choice]

Use real-world code examples where appropriate

Real-world examples are more accessible to beginners than abstract foos and bars. You can also copy them directly from your game projects, ensuring that any code snippet compiles without errors.

Writing var speed = 10 rather than var my_var = 10 allows beginners to understand code better. It gives them a frame of reference as to where they could use the code snippets in a live project.

Don’t write made-up examples:

onready var a = preload("res://MyPath")
onready var my_node = $MyNode


func foo():
    # Do stuff

Do write concrete examples:

onready var sfx_player_gun = preload("res://Assets/Sound/SFXPlayerGun.ogg")
onready var audio_player = $Audio/AudioStreamPlayer


func play_shooting_sound():
    audio_player.stream = sfx_player_gun
    audio_player.play()

Of course, there are times when using real-world examples is impractical. In those situations, you should still avoid using names such as my_var, foo() or my_func() and consider more meaningful names for your examples.

Give an overview of the node in the brief description

The brief description is the reference’s most important sentence. It’s the user’s first contact with a node:

  1. It’s the only description in the „Create New Node“ dialog.
  2. It’s at the top of every page in the reference

The brief description should explain the node’s role and its functionality, in up to 200 characters.

Don’t write tiny and vague summaries:

**Node2D**
Base node for 2D system.

Do give an overview of the node’s functionality:

**Node2D**
2D game object, parent of all 2D related nodes. Has a position, rotation, scale and z-index.

Use the node’s full description to provide more information, and a code example, if possible.

Mention what methods return if it’s useful

Some methods return important values. Describe them at the end of the description, ideally on a new line. No need to mention the return values for any method whose name starts with set or get.

Don’t use the passive voice:

Vector2 move ( Vector2 rel_vec )
[...] The returned vector is how much movement was remaining before being stopped.

Do always use „Returns“.

Vector2 move ( Vector2 rel_vec )
[...] Returns the remaining movement before the body was stopped.

Notice the exception to the „direct voice“ rule: with the move method, an external collider can influence the method and the body that calls move. In this case, you can use the passive voice.

Use „if true“ to describe booleans

For boolean member variables, always use if true and/or if false, to stay explicit. Controls whether or not may be ambiguous and won’t work for every member variable.

Also surround boolean values, variable names and methods with [code][/code].

Do start with „if true“:

Timer.autostart
If [code]true[/code], the timer will automatically start when entering the scene tree.

Use [code] around arguments

In the class reference, always surround arguments with [code][/code]. In the documentation and in Godot, it will display like this. When you edit XML files in the Godot repository, replace existing arguments written like ‚this‘ or `this` with [code]this[/code].

Common vocabulary to use in godot’s docs

The developers chose some specific words to refer to areas of the interface. They’re used in the sources, in the documentation, and you should always use them instead of synonyms, so the users know what you’re talking about.

Overview of the interface and common vocabulary

Overview of the interface and common vocabulary

In the top left corner of the editor lie the main menus. In the center, the buttons change the workspace. And together the buttons in the top right are the playtest buttons. The area in the center, that displays the 2D or the 3D space, is the viewport. At its top, you find a list of tools inside the toolbar.

The tabs or dockable panels on either side of the viewport are docks. You have the FileSystem dock, the Scene dock that contains your scene tree, the Import dock, the Node dock, and the Inspector or Inspector dock. With the default layout you may call the tabbed docks tabs: the Scene tab, the Node tab…

The Animation, Debugger, etc. at the bottom of the viewport are panels. Together they make up the bottom panels.

Foldable areas of the Inspector are sections. The node’s parent class names, which you can’t fold, are Classes e.g. the KinematicBody2D class. And individual lines with key-value pairs are properties. E.g. position or modulate color are both properties.

Image contribution guidelines

A significant part of the documentation is images, and there are several important guidelines to follow.

First, you should always be using the default editor theme and text when taking screenshots.

For 3D screenshots use 4xMSAA, enable anisotropic filtering on the projects textures, and set the anisotropic filter quality to 16x in Project Settings

Screenshot size should not exceed 1920x1080.

When you need to highlight an area of the editor to show something, like a button or option, use a 2 pixel thick outline without a bevel.

Before you add or replace any images in the documentation, they should be run through a png compressor to save size. The built in lossless compressor in programs like Krita or Photoshop should be done. However you should also use a lossy one, such as pngquant where almost no image quality is lost during compression.