nujujuju/lib/tick.lua

local tick = {
  framerate = -1,
  rate = 1 / 60,
  scale = 1,
  sleep = .001,
  delta = 0,
  accum = 0,
  index = 1,
  frame = 1
}

function tick.init()
  local timer = love.timer
  local graphics = love.graphics

  love.run = function()
    if love.math then
      love.math.setRandomSeed(os.time())
      for i = 1, 3 do love.math.random() end
    end

    if love.event then love.event.pump() end
    if love.load then love.load(arg) end
    timer.step()
    local lastframe = 0

    while true do
      timer.step()
      tick.delta = timer.getDelta() * tick.scale
      tick.accum = tick.accum + tick.delta
      while tick.accum >= tick.rate do
        tick.accum = tick.accum - tick.rate

        if love.event then
          love.event.pump()
          for e, a, b, c, d in love.event.poll() do
            if e == 'quit' then
              if not love.quit or not love.quit() then
                if love.audio then love.audio.stop() end
                return
              end
            end

            love.handlers[e](a, b, c, d)
          end
        end

        tick.index = tick.index + 1
        if love.update then love.update(tick.rate) end
      end

      while timer.getTime() - lastframe < 1 / tick.framerate do
        timer.sleep(.0005)
      end

      lastframe = timer.getTime()
      if graphics and love.window and love.window.isCreated() then
        graphics.clear()
        graphics.origin()
        tick.frame = tick.frame + 1
        if love.draw then love.draw() end
        graphics.present()
      end

      timer.sleep(tick.sleep)
    end
  end
end

return tick