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#!/usr/bin/env ruby
require 'gosu' # gem install gosu --no-document
include Gosu
$dimension, $splits = 200, 20
$size = $dimension.to_f / $splits.to_f
class Worm
attr_writer :dir
def initialize() reset end
def reset
@parts = [[0,0],[1,0],[2,0]]
@dir, @dir_matrix = KbRight, { KbUp=>[0,-1], KbDown=>[0,1],KbRight=>[1,0], KbLeft=>[-1,0] }
generate_food
end
def generate_food() @food = [rand($splits),rand($splits)] end
def update
part = [@parts[-1][0]+@dir_matrix[@dir][0], @parts[-1][1]+@dir_matrix[@dir][1]]
@food!=part ? @parts.shift : generate_food
if part[0]*part[1]<0 or part[0]>$splits or part[1]>$splits or @parts.include?(part)
reset
else
@parts.push part
end
end
def draw_split win, split
win.draw_quad split[0]*$size, split[1]*$size, Color::GREEN,
split[0]*$size+$size, split[1]*$size, Color::GREEN,
split[0]*$size+$size, split[1]*$size+$size, Color::GREEN,
split[0]*$size, split[1]*$size+$size, Color::GREEN
end
def draw win
draw_split win, @food
@parts.each { |split| draw_split win, split }
end
end
class GameWindow < Window
def initialize
super $dimension, $dimension, false, 100
self.caption = "Worm Game"
@worm = Worm.new
end
def button_down(key) @worm.dir = key if [KbDown,KbUp,KbRight,KbLeft].include? key end
def update() @worm.update end
def draw() @worm.draw self end
end
GameWindow.new.show
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