getRandomInt = (min, max) ->
  Math.floor(Math.random() * (max - min + 1)) + min;

allResourceTypes = ->
  (k for own k of app.game.resources)

posToTile = (x, y)->
  app.game.map[xyToPos(x, y)]

posToXY = (pos)->
  y = Math.floor(pos/20)
  x = pos-(y*20)
  [x, y]

xyToPos = (x, y)->
  y*20 + x