Ruby in Fantasy

require "fantasy"

SCREEN_WIDTH = 320
SCREEN_HEIGHT = 240

on_game do
  message = HudText.new(position: Coordinates.new(10, 10))
  message.text = "Hello, World!"
  message.size = "big"
end

start!

# Add assets dependencies
# ./images/spaceship.<any>
# ./images/laser.<any>
# ./sounds/shoot.<any>
# ./sounds/impact.<any>
# ./sounds/game_over.<any>

require "fantasy"

SCREEN_WIDTH = 640
SCREEN_HEIGHT = 360

on_game do
  player = Actor.new("spaceship")
  player.position = Coordinates.new(100, 100)
  player.move_with_cursors
  player.speed = 100

  points = HudText.new(position: Coordinates.new(10, 20))
  points.text = 0

  10.times do
    enemy = Actor.new("enemy")
    enemy.position = Coordinates.new(rand * SCREEN_WIDTH, rand * SCREEN_HEIGHT)
  end

  on_space_bar do
    Sound.play("shoot")
    laser = Actor.new("laser")
    laser.position = player.position + Coordinates.new(0, -10)
    laser.speed = 400
    laser.direction = Coordinates.up
    laser.on_collision do |other|
      if other.name == "enemy"
        Sound.play("impact")
        other.destroy
        laser.destroy
        points.text += 1
      end
    end
  end

  player.on_collision do |other|
    if other.name == "enemy"
      Sound.play("game_over")
      Global.go_to_end
    end
  end
end

on_end do
  HudText.new(position: Coordinates.new(10, 100), text: "You are dead. Press space to re-tart")

  on_space_bar do
    Global.go_to_game
  end
end

start!

gem "fantasy"

SCREEN_WIDTH = 640
SCREEN_HEIGHT = 360

# (Optional)
on_presentation do
  # Game elements running when the game loads
end

# (Required)
on_game do
  # Game elements running when in game Scene
end

# (Optional)
on_end do
  # Game elements running when game is ended
end

Global.go_to_presentation
Global.go_to_game
Global.go_to_end

on_presentation do
  HudText.new(position: Coordinates.new(10, 100), text: "Press space to start")

  on_space_bar do
    Global.go_to_game
  end
end

on_game do
  # [...]
  if player.dead
    Global.go_to_end
  end
end

on_end do
  HudText.new(position: Coordinates.new(10, 100), text: "You are dead. Press space to re-tart")

  on_space_bar do
    Global.go_to_presentation
  end
end

player = Actor.new("warrior") # ./images/warrior.png
player.position = Coordinates.new(100, 100)
player.solid = true
player.speed = 200
player.layer = 1
player.move_with_cursors
player.collision_with = ["enemy", "bullets"] # default "all"

player.on_collision do |other|
  if other.name == "enemy"
    player.destroy
  end
end

player.on_after_move do
  if player.position.x > Global.screen_width
    player.position.x = Global.screen_width
  end

  if player.position.x < 0
    player.position.x = 0
  end
end

class Player < Actor
  def initialize
    super("warrior") # ./images/warrior.png
    @position = Coordinates.new(100, 100)
    @solid = true
    @speed = 200
    @layer = 1
    @direction = Coordinates.zero
    @collision_with = ["enemy", "bullets"] # default "all"
    move_with_cursors
  end

  def on_collision_do(other)
    if other.name == "enemy"
      destroy
    end
  end

  def on_after_move_do
    if @position.x > SCREEN_WIDTH
      @position.x = SCREEN_WIDTH
    end

    if @position.x < 0
      @position.x = 0
    end
  end
end

player = Actor.new("warrior") # ./images/warrior.png
player.solid = true
player.jump = 150
player.gravity = 200
player.move_with_cursors(left: true, right: true, up: false, down: false, jump: true)

player.on_jumping do
  Sound.play("jump")
  player.image = "warrior_jump"
end

player.on_floor do
  player.image = "warrior"
end

clock =
  Clock.new do
    enemy.attack
    sleep(1)
    enemy.defend
  end

clock.run_now
clock.run_on(seconds: 2)
clock.repeat(seconds: 2, times: 10)
clock.stop

# Simple color
on_presentation do
  Global.background = Color.new(r: 34, g: 35, b: 35)
end

# Replicable (by default) Image
# position is relative to Camera.main
on_game do
  background = Background.new(image_name: "beach")
  # background.repeat = false # if you don't want the image to replicate
  background.scale = 6
end

Disk.data.records = [120_000, 11_000, 678]
Disk.data.last_level = 3
Disk.data.sound_volume = 12
Disk.save # data stored in ./disk/data.json

# ... in another session

Disk.data.records # => [120_000, 11_000, 678]
Disk.data.last_level # => 3
Disk.data.sound_volume # => 12

on_game do
  on_loop do
    # Camera follows player
    Camera.main.position.y = player.position.y - (SCREEN_HEIGHT / 2)
  end
end

Sound.play("shoot") # ./sounds/shoot.wav

Music.play("music") # ./musics/music.mp3
Music.volume = 0.5
Music.stop

# ./maps/sky.txt
# 0     0
#  0  1
#   0   0
# 0    01

planet = Actor.new("planet")
star = Actor.new("star")
map = Tilemap.new(map_name: "sky", tiles: [planet, star], tile_size: 30)
map.spawn

timer = HudText.new(position: Coordinates.new(SCREEN_WIDTH / 2, 10))
timer.text = 0
timer.alignment = "center"
timer.size = "big"

Clock.new { timer.text += 1 }.repeat(seconds: 1)

icon = HudImage.new(position: Coordinates.new(SCREEN_WIDTH - 220, 8), image_name: "ring")
icon.scale = 4
icon.visible = true

Clock.new { icon.visible = !icon.visible }.repeat(seconds: 1)