Collision demo with Bomp library for Ruby2D

bomp_demo.rb

require 'ruby2d'
require 'bomp'

class Box < Rectangle
  attr_reader :x, :y, :width, :height

  def initialize
    super()
    self.width = rand 50..150
    self.height = rand 50..150
    self.x = rand(0..Window.width - @width)
    self.y = rand(0..Window.height - @height)
    self.color = 'random'
  end
end

class Player < Square
  def initialize
    super()
    self.size = 25
    self.color = 'red'
  end
end

@world = Bomp::World.new
@boxes = Array.new(15) { Box.new }
@player = Player.new

@boxes.each { |box| @world.add box }
@world.add @player

on :key_held do |event|
  key = event.key
  speed = 2.5
  x, y = [0, 0]

  case key
  when 'up'
    y -= 1
  when 'down'
    y += 1
  when 'left'
    x -= 1
  when 'right'
    x += 1
  end

  filter = lambda do |item, other|
    item.color = 'random'
    other.color = 'random'
    return 'slide'
  end

  puts @world.move(@player, x: x * speed, y: y * speed, filter: filter)
end

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