pico-nn

A pico-8 based neural network with genetic algorithms.

itch.io page

Lexaloffle BBS post

Getting started

Just copy code from here and use it in pico-8 or other lua app.

You also can download pico-8 carts from Itch or Lexaloffle BBS.

Also note that nn's draw function won't work in other lua applications, because its using pico-8's built-in functions.

Usage

A simple example on how to use it:

function _init()
    layers = {3, 5, 3}
    net = nn:new(layers)
    net:init_neurons()
    net:init_weights()
end

function _update()
	local input = {0.2, 0.5, 0.4}
	local output = net:feed_forward(input)
	local class = get_class(output)

	if class == 1 then
		-- do some action
	elseif class == 2 then
		-- do some other action
	else 
		-- do a completely different action
	end

	net:addfit(1 / 60)

	-- network mutation
	if condition then
		net:mutate()
	end
end

function _draw()
	local x, y = 4, 4
	local w, h = 120, 64
	net:draw(x, y, w, h)
end

Todo

• Figure out a way to save trained model
• ...and a way to load it