DragonRuby Sprite Kit

What is this?

Right now Sprite Kit is a basic utility helper for me with things I want to carry between projects.

Things like

• Making spritesheets easier to work with (Most asset packs ship as spritesheets and are annoying to work with)

• Map editors / Level Editors

• Who knows what else?

Sprite Kit is built for DragonRuby with the intent of you extending it. Its designed to take the place of external tools you may use.

Using degit

npx degit konnorrogers/dragonruby-sprite-kit/mygame/lib ./mygame/vendor/sprite-kit

Download a zip from releases

Working with Spritesheets

I personally found working with Spritesheets (images containing multiple assets inside) particularly painful with DragonRuby.

So lets start with the basics. Not everyone will need a Map Editor. But everyone will probably end up working with a spritesheets full of many sprites.

Rendering the Canvas

The SpriteCanvas is a scene designed for viewing your sprites. Its a large “infinite” canvas where you can drop spritesheets and see them appear.

require "vendor/sprite-kit"

def tick(args)
  spritesheet_scene ||= SpriteKit::SpritesheetScene.new
  spritesheet_scene.tick(args)
end

The above will render a canvas for you to select your sprites from a canvas and copy them your clipboard.

Scene Manager

If you would like, DragonRuby Sprite Kit also ships with Scene Manager and Scenes.

class MainScene < SpriteKit::Scene
  def render
    draw_buffer.primitives << {
      x: Grid.w / 2,
      y: Grid.h / 2,
      text: "Hello World"
    }.label!
  end
end

class Game
  def initialize
    @scene_manager = SpriteKit::SceneManager.new(
      current_scene: :main_scene,
      scenes: {
        main_scene: MainScene,
      }
    )
  end

  def tick(args)
    @scene_manager.tick(args)
  end
end

def tick(args)
  $game ||= Game.new
  $game.tick(args)
end

def reset
  $game = nil
end

$gtk.reset

Map Editor (Maybe?)