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-- https://github.com/vrld/hump/blob/master/vector.lua
-- http://nova-fusion.com/2011/06/30/lua-metatables-tutorial/

local assert = assert
local sqrt, cos, sin, atan = math.sqrt, math.cos, math.sin, math.atan2

Vector = {}
Vector.__index = Vector

function Vector.new(x, y)

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-- The problem:
-- Lua has a problem whenever you want to define a C-like struct.
-- For instance, when I want to define a point structure without having 
-- to define a new class I can create a table like so:
--
-- {x = number, y = number}
--
-- And a function that does something to points can use them like this:
--
-- function dist(p1, p2)

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-- There are some timing related constructs that appear very often 
-- while developing games. One such construct is as follows:
--
-- function update(dt)
--   counter = counter + dt
--   if counter >= action_delay then
--     counter = 0
--     action()
--   end
-- end 

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function getPSO(filename)
    local templates = loadstring("return " .. love.filesystem.read(filename))()
    local pss = {}
    local degToRad = function(d) return d*math.pi/180 end
    local getPS = function(template)
        local sprite = love.graphics.newImage('your_default_sprite_here.png') 
        local ps = love.graphics.newParticleSystem(sprite, template.buffer_size)
        ps:setBufferSize(template.buffer_size)
        local colors = {}
        for i = 1, 8 do

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Graph = {}
Graph.__index = Graph

function Graph.new()
    return setmetatable({adjacency_list = {}}, Graph)
end

function Graph:__tostring()
    local str = ""
    for node, list in pairs(self.adjacency_list) do

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Graph = {}
Graph.__index = Graph

function Graph.new()
    return setmetatable({adjacency_list = {}, nodes = {}, edges = {}, floyd_dists = {}}, Graph)
end

function Graph:__tostring()
    local str = "----\nAdjacency List: \n"
    for node, list in pairs(self.adjacency_list) do

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local async = require('async')

function love.load(args)
  async.load()
  async.ensure.atLeast(2)
  
  local version = nil
  local version_request = async.define("version_request", function()
    local request = require('luajit-request')
    local response = request.send(link to the version file)

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export Object

class Object
    new: (level, x, y, opts) =>
        for k, v in pairs(opts) do self[k] = v
        @id = uuid!
        @dead = false
        @creation_time = love.timer.getTime!
        @depth = 50
        @level = level

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function love.load()
    -- Setup necessary to make the screen have a pixelated look
    window_width, window_height = 1280, 720
    game_width, game_height = 480, 270
    love.window.setMode(window_width, window_height)
    love.graphics.setDefaultFilter('nearest')
    love.graphics.setLineStyle('rough')
    canvas = love.graphics.newCanvas(game_width, game_height)

    physics_step()

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timers = {}

function after(delay, action, repeatable, after, tag)
    local tag = tag or uid() -- uid returns a unique id every time it's called, "or" will resolve the expression to the result of uid() if tag is nil (the same as if not tag then tag = uid() end)
    timers[tag] = {type = 'after', current_time = 0, delay = delay, action = action, repeatable = repeatable, after = after, tag = tag}
end

function tween(delay, target, source, method, after, tag)
    local tag = tag or uid()
    local initial_values = {}