pewpew.rb

require 'chingu'

class Game < Chingu::Window

	def initialize
		super
		self.input = {esc: :exit}
		Player1.create
		Player2.create
	end

	def update
		super
		Laser.each_bounding_circle_collision(Player1, Player2) do |laser, player|
			laser.destroy
			player.destroy
		end
	end

end

class Player < Chingu::GameObject

	has_traits :velocity, :collision_detection, :bounding_circle

	def setup
		@velocity_x = 0
		@velocity_y = 0
		@image = Gosu::Image["ship.png"]
	end

	def fire
		Laser.create(x: @x + Gosu::offset_x(@angle, 50), 
					 y: @y + Gosu::offset_y(@angle, 50), 
					 angle: @angle, 
					 velocity_x: @velocity_x + Gosu::offset_x(@angle, 5),
					 velocity_y: @velocity_y + Gosu::offset_y(@angle, 5))
	end

	def update
		@velocity_x *= 0.95
		@velocity_y *= 0.95
	end

	def accelerate
		@velocity_x += Gosu::offset_x(@angle, 0.5)
		@velocity_y += Gosu::offset_y(@angle, 0.5)
	end

	def left
		@angle -= 5
	end

	def right
		@angle += 5
	end
end

class Player1 < Player

	def setup
		@x = 200
		@y = 300
		@angle = 0
		self.input = {holding_a: :left, holding_d: :right, holding_w: :accelerate, s: :fire}
		super
	end

end

class Player2 < Player

	def setup
		@x = 400
		@y = 500
		@angle = 0
		self.input = {holding_left: :left, holding_right: :right, holding_up: :accelerate, space: :fire}
		super
	end

end


class Laser < Chingu::GameObject

	has_traits :velocity, :timer, :collision_detection, :bounding_circle

	def setup
		@image = Gosu::Image["laser.png"]
		Gosu::Sound["pew-pew.wav"].play
		after(1000) { self.destroy}
	end

end



Game.new.show