main.rb

$gtk.reset

require 'lib/arrows.rb'
require 'lib/parallax.rb'
require 'lib/window.rb'
require 'lib/fps.rb'
require 'lib/platform.rb'

LAYERS = [
  'layer1.png',
  'layer2.png',
  'layer3.png',
  'layer4.png',
  'layer5.png',
].map { |s| "assets/#{s}" }

def setup args
  Platform.set

  Window.set_args args
  Utils.set_args args
  Arrows.set_args args
  Parallax.set_args args

  Window.set_screen_size 1280, 720

  Window.add_lock_line :left, 0, nil
  Window.add_lock_line :right, 1280, nil
  Window.add_lock_line :bottom, nil, 0
  Window.add_lock_line :top, nil, 720

  Window.add name: :root

  Platform.except :emscripten {
    Window.add(
      name: :minimap,
      w: 200,
      position: :top_right,
      shrink: true,
      draggable: true,
      focusable: true,
      collision: true,
      margin_left: -10,
      margin_top: 10
    )
  }

  args.state.setup_done = true
end

def tick args
  setup args unless args.state.setup_done

  # Renders the parallax
  Parallax
    .create(layers: LAYERS)
    .update
    .render_into(:root)

  # Renders the arrow keys feedback visual
  Arrows.create(size: 200, active_alpha: 50, inactive_alpha: 22)
  Platform.except :emscripten { Arrows.update }
  Arrows.render_into(:root)

  Window.render :root

  Platform.except :emscripten {
    Window.render :minimap, from: :root
    Window.mainloop
  }

  # Just a small helper to display FPS on top of everything
  FPS.render_standalone :debug
end