-- Helloworld like tic80 on love2d

function love.load()
  love.graphics.setDefaultFilter("nearest", "nearest")

  -- load image
  img = love.graphics.newImage("obj.png")

  -- set Quad
  anime = {}
  for i = 0, 1 do
    -- set x, y, w, h, sw, sh
    anime[i + 1] = love.graphics.newQuad(i * 16, 0, 16, 16, img:getDimensions())
  end

  img_scale = 8
  x = (love.graphics.getWidth() - 16 * img_scale) / 2 -- centring
  y = love.graphics.getHeight() * 0.25
  t = 0
end

function love.update(dt)
  -- move object by key input
  local spd = 240 * dt
  if love.keyboard.isDown("up") then
    y = y - spd
  end
  if love.keyboard.isDown("down") then
    y = y + spd
  end
  if love.keyboard.isDown("left") then
    x = x - spd
  end
  if love.keyboard.isDown("right") then
    x = x + spd
  end

  t = t + dt
end

function love.draw()
  -- clear screen
  love.graphics.clear(0.4, 0.7, 0.8, 1.0)

  -- draw image
  local n = 1 + math.floor(t / 0.3) % #anime
  local angle = math.rad(0)
  local scale = img_scale
  love.graphics.setColor(1.0, 1.0, 1.0, 1.0)
  love.graphics.draw(img, anime[n], x, y, angle, scale, scale)

  -- draw text
  local tx = (love.graphics.getWidth() - 8 * 12) / 2 -- centering
  local ty = love.graphics.getHeight() * 0.75
  love.graphics.print("HELLO WORLD!", tx, ty)

  love.graphics.print("FPS: " .. tostring(love.timer.getFPS()), 2, 2)
end

function love.keypressed(key, isrepeat)
  if key == "escape" then
    -- ESC key to exit
    love.event.quit()
  end
end