End of tutorial 1 for the polished platformer series

main.lua

bump = require 'bump'

local world = bump.newWorld()

local level = {elems = {}}

function level:addElem(x, y, w, h, drawLambda)
  local t = {draw = drawLambda}
  world:add(t, x, y, w, h)
  table.insert(self.elems, t)
  return t
end

function level:draw()
  for _, v in pairs(self.elems) do
    v:draw(world:getRect(v)) -- self, x, y, w, h
  end
end

function love.load()
  love.graphics.setBackgroundColor(100, 100, 100)
  level:addElem(0, 500, 100, 100,
    function(self, x, y, w, h)
      love.graphics.setColor(255, 255, 0)
      love.graphics.rectangle('line', x, y, w, h)
    end)
  box = level:addElem(0, 10, 20, 20, 
    function(self, x, y, w, h)
      love.graphics.setColor(0, 255, 0)
      love.graphics.rectangle('line', x, y, w, h)
    end)
  box2 = level:addElem(0, -10, 20, 20, 
    function(self, x, y, w, h)
      love.graphics.setColor(0, 255, 0)
      love.graphics.rectangle('line', x, y, w, h)
    end)
end

function love.draw()
  level:draw()
end

function love.update(dt)
  local x, y, _, _ = world:getRect(box)
  world:move(box, x + 1, y + 10)
  world:move(box2, x + 4, y + 10)
end