ScreenEffects by Trplnr

A small flexible library for showing animated screen overlays to the user.

Download the datapack and resource pack!

Examples:

• This is a YouTube video, click to play.

How to use:

Making Screen Effects using the builder Deno file:

[!NOTE] Using this method requires the following to be installed in your system: Deno, ffmpeg. After getting those, restart your computer.

• A screen effect is composed of multiple font frames that the datapack uses to show the animation.
• A utility Deno JS file is provided with the resource pack inside the screen_effects folder to make this process easier.

1. Making the animation

[!NOTE]

• You can use any image editing software you like as long as it can export your animation into a spritesheet. Aseprite has this functionality.
• It is recommended to make a 256x256 .png file for the best results.

• Start by creating an animation.

• Export your animation into a vertical spritesheet inside the screen_effects folder.

• You can add more spritesheets inside the screen_effects folder if you want more screen effects.

2. Building the animations

• To prepare for building the animations, go inside the buildScreenEffects.js folder and adjust these configs.

// -------------CONFIGS---------------
// Replace with the namespace you use!
const NAMESPACE = "example";

// This logs what the builder is currently doing.
// If compiling is taking a while, disabling this will improve compilation time.
const debugMode = false;

// If you want the font JSON files to be formatted, make this boolean true.
const prettyPrintFontFiles = false;

// If you want to see the ffmpeg logs, make this boolean true.
// If compiling is taking a while, disabling this will improve compilation time.
const showFFMPEGLogs = false;
// -----------------------------------

• To make your amazing animations usable by the datapack, You can run a command in your terminal to convert your spritesheets into frames!
• Open your preferred terminal and make sure you are inside the screen_effects folder.
• After that, run this command deno run --allow-all .\buildScreenEffects.js

• After running that, if everything is successful, it should look like this:

• Congrats! You've successfully turned your wonderful animations into frames! :tada:

• If you only want to to compile 1 spritesheet, simply run deno run --allow-all .\buildScreenEffects.js <REPLACE WITH FILENAME including .png>

Registering the Screen Effects

• The screen effect registry is inside the scrfx:registry .mcfunction file.
• It declares what screen effects are available and what their properties are.
• A screen effect inside the registry looks like this:

"ns:identifier": {
    tps: positive integer,
    frame_count: positive integer,
    middle: {
        frame: positive_integer below or equal to frame_count,
        callback: command
    },
    end: { callback: command },
    path: resource path.
}

• Properties:
  • "ns:identifier" - The identifier of the screen effect, the namespace is optional but recommended to be compatible with other packs.
  • tps - The frametime / fps of the screen effect, but in ticks. (1 second = 20 ticks)
  • frame_count - How much frames the screen effect has.
  • middle.frame (optional) - Points to what frame the declared 'middle' is. This is useful for transition animations like tping the player when the screen is fully covered.
  • middle.callback (optional) - The command to run when the 'middle' frame is ran.
  • end.callback (optional) - The command to run when the 'end' frame is ran. This does not have a 'frame' property, this already runs once the animation ends.
  • path - The resource path of the font file with the number at the end omitted.

[!TIP] When in development, you can turn on development mode using a scoreboard value so the registry always gets reloaded when doing /reload. Simply run scoreboard players set .dev_mode scrfx.zinternals.globals 1 to turn this on.

Running the Screen Effects

• Declare the animation to be played inside the scrfx:in id storage.
• Then execute as a player and run scrfx:play!
• Example:

data modify storage scrfx:in id set value "ns:identifier"
execute as Trplnr run function scrfx:play

• You have successfully played a screen effect! :tada: