ruby2d-test.rb

require 'time'
require 'ruby2d'


DEFAULT_FONT       = 'DejaVuSansMono.ttf'
DEFAULT_FONT_SIZE  = 12
DEFAULT_FONT_COLOR = 'green'


def get_info_text(tick)
  "time: #{Time.now.strftime('%T')}, tick: #{tick}"
end

def get_event_text(event)
  "x: #{event.x}, y: #{event.y}"
end

def draw_text(text, x: 10, y: 10,
              font: DEFAULT_FONT, size: DEFAULT_FONT_SIZE, color: DEFAULT_FONT_COLOR)
  Text.new(text, font: font, size: size, color: color, x: x, y: y)
end


set title: 'ruby2d test'

tick = 0

triangle = Triangle.new(x1: 320, y1: 50,
                        x2: 540, y2: 430,
                        x3: 100, y3: 430,
                        color: ['red', 'green', 'blue'])

info_text  = draw_text(get_info_text(tick), y: 10)
event_text = draw_text(''                 , y: info_text.y + DEFAULT_FONT_SIZE + 5)


update do
  close if tick == 1000

  tick += 1

  info_text.text = get_info_text(tick)

  triangle.x1 = (triangle.x1 + 1) % Window.width
  triangle.x2 = triangle.x1 + 220
  triangle.x3 = triangle.x1 - 220
end

on :mouse_down do |event|
  hit             = triangle.contains?(event.x, event.y)
  event_text.text = "#{get_event_text(event)}, hit the triangle: #{hit ? 'yes' : 'no'}"
end


show