Coin Toss

main.rb

$gtk.reset

class Button
  attr_accessor :label
  def initialize(x, y, h, w, label)
    @x = x
    @y = y
    @h = h
    @w = w
    @label = label
    @rect = [@x, @y, @w, @h]
  end

  def clicked?(point)
    point.inside_rect?(@rect)
  end

  def render(args)
    args.outputs.borders << [*@rect, 0, 0, 0, 255]
    args.outputs.solids << [*@rect, 255, 0, 0, 255]
    args.outputs.labels << [@x + 25, @y + @h, @label, 13]
  end
end

class Coin
  attr_accessor :face_up

  def initialize(x, y, size)
    @faces ||= ["Heads", "Tails"]
    @face_up ||= @faces[rand(2)]
    @x = x
    @y = y
    @size = size
  end

  def flip
    @face_up = @faces[rand(2)]
  end

  def head_image
    case @face_up
    when 'Heads'
      "sprites/circle/orange.png"
    when 'Tails'
      "sprites/square/green.png"
    end
  end

  def render(args, alpha)
    sprite_size = 150
    args.outputs.sprites << [@x - sprite_size/2, @y, sprite_size, sprite_size, head_image(), 0, alpha]
    args.outputs.labels << [@x, @y, @face_up, 25, 1, 0, 0, 0, alpha]
  end
end

class CoinToss
  def initialize
    @coin = Coin.new(1280/2, 300, 50)
    @bet = nil
    @won = 0
    @loss = 0
    @coin_alpha = 0
  end

  def render_input
    button_h = 50
    button_w = 150
    button_x = 300
    button_y = 150
    @heads ||= Button.new(button_x + 100, button_y, button_h, button_w, "Heads")
    @tails ||= Button.new(button_x + 400, button_y, button_h, button_w, "Tails")
    @buttons ||= [
      @heads,
      @tails
    ]
    @buttons.map { |button| button.render(@args) }
  end

  def render_coin
    return unless @coin

    @coin_alpha += 7
    @coin.render(@args, @coin_alpha)
  end

  def render_results
    @args.outputs.labels << [1280 / 4 - 50, 600, "Won: #{@won} Loss: #{@loss}", 50]
  end

  def render_instructions
    @args.outputs.labels << [1280 / 2 - 200, 50 + 25, "Click HEADS or TAILS to bet and flip coin"]
    @args.outputs.labels << [1280 / 2 - 100, 50, "Press SPACE to restart"]
  end

  def render
    render_input
    render_coin
    render_results
    render_instructions
  end

  def toss_coin
    @coin_alpha = 0
    @coin.flip
    if @bet == @coin.face_up
      @won += 1
    else
      @loss += 1
    end
    @bet = nil
  end

  def handle_input
    if @args.inputs.keyboard.key_down.space
      $gtk.reset
    end

    return unless @args.inputs.mouse.click
    return if @bet
    return if @coin_alpha <= 255

    @bet = nil
    @buttons.each do |button|
      next unless button.clicked?(@args.inputs.mouse.click.point)

      @bet = button.label
    end

    toss_coin if @bet
  end

  def tick(args)
    @args = args
    render
    handle_input
  end
end

def tick args
  args.state.game ||= CoinToss.new
  args.state.game.tick(args)
end