gmdialogue

gmdialogue is a dialogue system for GameMaker Studio 2.3+ that uses command blocks to apply effects to the text

Usage

Before ever using this dialogue system be sure to put dialogue_setup(); somewhere in the beginning of the game. This function will create small data structures needed for parsing. Values of these structures can be changed as you wish.

Dialogues used with this asset are stored as gml scripts of functions. To open dialogue call dialogue_open(dialogue, [ arg1, arg2, arg3 ]);, where dialogue is the name of the script or function (global or local) which contains dialogue. Script or function parameters are passed in the form of a value array.

Dialogue script / function must contain an array of strings named messages. E.g.:

function example_dialogue() {
    messages = [
        "Line 1",
        "Line 2",
        "Line 3"
    ];
}

...

dialogue_open(example_dialogue, []);

If you want to open a dialogue from the specific position, use dialogue_open_at(dialogue, [args], position); function, where a third argument points to the index of an element in the messages array.

Another way of opening dialogue is upon calling the dialogue_from_file(filename); function. It reads the given text file line by line. Each line is treated as a separate message.

You do not need to close (destroy) existing dialogue instance to open another. Calling dialogue_open(); with a dialogue instance already exists will interrupt the current dialogue and start the requested one.

In order to check the presence of a dialogue instance, use the global.dialogue_is_open boolean variable.

Dialogue messages are plain strings. There are different command blocks which can be used to change the appearance and properties of a message or a textbox, play sound or to control dialogue instance itself.

Each command block has the following structure: in square brackets, name of the command followed by none or up to 8 values all separated with colons [name:value:value:value].

Command blocks

Here is a table of the available commands. Some elements of this table include aspects of the dialogue system which will be discussed later. For some commands such as colour, effect, font, highlight, image index, sound, etc., position matters.

Name	Syntax	Values	Description
Autoproccess	[auto:delay]	delay — number of steps before processing to the next message	This command tells dialogue system to automatically go to the next message after current has been displayed
Character	[chr:index] [character:index]	index — value representing character index	Sets dialogue character
Colour	[c:index] [col:index] [color:index] [colour:index] [c:model:colour] ...same for the rest	index — value representing colour index model — one of the colour models: rgb, bgr or hsv colour — three numbers separated by spaces	Sets text colour
Highlight	[h:index] [highlight:index] [h:model:colour] ...same for the rest	index — value representing colour index model — one of the colour models: rgb, bgr or hsv colour — three numbers separated by spaces	Sets text highlight colour
Delay	[d:delay] [delay:delay] [d:delay:unskippable] ...same for the rest	delay — number of steps to wait unskippable — boolean value. If true, delay cannot be skipped. Can be omitted. False by default	Stops dialogue for the given amount of steps
Effect	[e:index] [effect:index]	index — value representing effect index	Sets text effect
Exit	[exit]	---	Immediately closes dialogue
Font	[f:index] [font:index]	index — value representing font name	Sets text font
Go to reference	[gotoref:dialogue:refID]	dialogue — asset index of a script / function containing dialogue refID — id of the desired reference	Opens given dialogue from the referenced line. Note: this command will clear the dialogue stack! If the reference is absent, the dialogue ends
Reference	[#refID]	refID — id to be referenced	Only used for referencing messages
Image index	[i:index] [index:index] [i:index:sliding] ...same for the rest	index — number of the sub—image of the current dialogue sprite sliding — boolean value. If true, the sprite will slide from the side. Can be omitted. True by default	Changes sprite image index
Layout	[l:index] [layout:index]	index — value representing layout index	Sets dialogue layout
No skip	[noskip]	---	Disables skip for current message
New dialogue	[o:dialogue:arg1:arg2...] [open:dialogue:arg1:arg2...] [open:dialogue_from_file:filename]	dialogue — asset index of a script / function containing dialogue	Opens specified dialogue. Note: this command will clear the dialogue stack!
Pop out	[pop]	---	Ends current sub-dialogue (branch created by question command) and returns to previous dialogue
Sound	[snd:index]	index — value representing sound name	Plays a sound
Sprite index	[spr:index] [sprite:index] [spr:index:sliding] ...same for the rest	index — asset index of a sprite sliding — boolean value. If true, the sprite will slide from the side. Can be omitted. True by default	Changes sprite
Text speed	[ts:index]	index — value representing text speed (e.g. slow, normal or fast)	Sets text speed
Question	[q:index] [question:index]	index — question name	Shows question

Questions and branching (kind of)

There is just one function dialogue_add_question(); and one command [q:] for working with questions. A question consists of options and answers. Similarly to dialogues, the answer is an array of messages. New questions are created inside the dialogue function with dialogue_add_question(index, option, []); function, where index is a name of the question, it is used in [q:] command. To create a question with multiple choices call dialogue_add_question(); with the same question's name multiple times.

When answer-dialogue (sub-dialogue) ends, previous dialogue continues. This hierarchy is called dialogue stack.

Note: opening new dialogue destroys both dialogue stack and question map!

function example_dialogue() {
    messages = [
        "Line 1",
        "Line 2",
        "Line 3 [q:MORE]",

        "Line 6",
        "Line 7"
    ];

    dialogue_add_question("MORE", "MORE!", [
        "Line 4",
        "Line 5"
    ]);
}

Output of this dialogue will be as following:

Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7

Besides, it is possible to use [open:] command to switch between dialogues imperceptibly.

Thank you for checking out this asset!

Requirements

• GameMaker Studio 2.3+