LÖVE

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local width = 200
local height = 200
local min_room_wall_size = 20 -- a min margin of a room, used to prevent too small rooms
local rooms = {[1]={x=0, y=0, w=width, h=height, col = {1,1,1}}}

local function get_vol(room) -- we need this to get the volume of a room
   return room.w*room.h
end

local function volume_sort(table1, table2) -- this one compares two rooms and tells whether room1 is bigger than room2
   return get_vol(table1) > get_vol(table2)
end

function love.keyreleased(key)
   if key=='escape' then -- not that needed on a PC, but Android users will be able to exit app normally
      love.event.quit()
   end
   
   local dir = math.random(0,1) -- choose a direction: 0 for vert, 1 for horz
   table.sort(rooms, volume_sort) -- sort rooms by volume, after this the first room will be the biggest one and the one to divide
   local wall -- a placeholder for a new wall's x *or* y
   if dir == 0 then -- if we split vertically:
      if rooms[1].w > min_room_wall_size*3 then -- it is a  good idea to not divide a room if it is not too big in the first place
         wall = math.random(min_room_wall_size, rooms[1].w - min_room_wall_size) -- pick up a place to place a  wall
         rooms[#rooms+1] = {x = wall+rooms[1].x, y = rooms[1].y, w = rooms[1].w - wall, h = rooms[1].h, col = {math.random(),math.random(),math.random()} } -- create  a new room; col is needed to draw a room with a different color
         rooms[1].w = wall -- we can't change the initial room's width due to the way a new room size is being calculated
      end
   elseif dir == 1 then -- with minor changes, the same for horizontal division
      if rooms[1].h > min_room_wall_size*3 then
         wall = math.random(min_room_wall_size, rooms[1].h - min_room_wall_size)
         rooms[#rooms+1] = {y = wall+rooms[1].y, x = rooms[1].x, h = rooms[1].h - wall, w = rooms[1].w, col = {math.random(),math.random(),math.random()}}
         rooms[1].h = wall
      end
   end

   for k,v in ipairs(rooms) do -- this will yield info on all rooms
       print(k,get_vol(v), v.x, v.y, v.w, v.h)
   end
end



function love.draw()
   love.graphics.print('Rooms: '..#rooms, 40, 10)
   love.graphics.translate(40,40)
   for k,v in ipairs(rooms) do
       love.graphics.setColor(v.col)
       love.graphics.rectangle("line", v.x, v.y, v.w, v.h)
   end
end

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local _major, _minor, _revision, _codename = love.getVersion()

if _major>=11 then
   local old = love.graphics.setColor
   function lg.setColor(arg,two,three,four)
      if two then -- there's 3 or 4 vars
         old(arg/255,two/255,three/255, (four or 255)/255)
      else -- arg is a table
         if arg then
            old(arg[1]/255,arg[2]/255,arg[3]/255, (arg[4] or 255)/255)
         else
            local arg = main
            old(arg[1]/255,arg[2]/255,arg[3]/255, (arg[4] or 255)/255)
         end
      end
   end

   local _old = lg.getColor
   function lg.getColor()
      local ret = {_old()}
      return ret[1]*255,ret[2]*255,ret[3]*255,ret[4]*255
   end

   lw.getPixelScale = lw.getDPIScale
end