从旋转图像的同一点进行拍摄

我正在尝试制作一个基本的顶部射击游戏原型，但我在将子弹从图像旋转时出现了一些问题。 我目前的代码很好用，因为子弹从图像的中心射出，但我希望它从精灵的右侧，即枪的位置射出：

function love.load()
love.graphics.setBackgroundColor(54, 172, 248)

player = love.graphics.newImage('/assets/images/player.png')
  playerX = 300
  playerY = 300
  playerSpeed = 200

  bullets = { }
  bulletSpeed = 250

  cursor = love.mouse.newCursor('assets/images/crosshair.png', 24, 24);
  love.mouse.setCursor(cursor);
end

function love.update(dt)
  -- 获取鼠标位置以旋转玩家
  local mouseX, mouseY = love.mouse.getPosition()
  playerRotation = math.atan2(mouseY - playerY, mouseX - playerX);

  -- 键盘输入移动玩家
  if love.keyboard.isDown('s') then
    playerY = playerY + playerSpeed * dt
  elseif love.keyboard.isDown('w') then
    playerY = playerY - playerSpeed * dt
  end

  if love.keyboard.isDown('a') then
    playerX = playerX - playerSpeed * dt
  elseif love.keyboard.isDown('d') then
    playerX = playerX + playerSpeed * dt
  end

  -- 更新所有子弹位置
  for i, v in ipairs(bullets) do
    v.x = v.x + (v.dx * dt)
    v.y = v.y + (v.dy * dt)
  end
end

function love.draw(dt)
  -- 绘制玩家
  love.graphics.draw(player, playerX, playerY, playerRotation, 0.5, 0.5, player:getWidth() / 2, player:getHeight() / 2);

  -- 绘制所有子弹
  love.graphics.setColor(128, 128, 128)
  for i, v in ipairs(bullets) do
    love.graphics.circle("fill", v.x, v.y, 3);
  end
end

function love.mousepressed(x, y, button)
  if button == 1 then
    local startX = playerX;
    local startY = playerY;
    local mouseX = x
    local mouseY = y

    local angle = math.atan2((mouseY - startY), (mouseX - startX))

    local bulletDx = bulletSpeed * math.cos(angle)
    local bulletDy = bulletSpeed * math.sin(angle)

    table.insert(bullets, {x = startX , y = startY, dx = bulletDx, dy = bulletDy})
  end
end

如何从精灵的同一点绘制它被旋转时的图像？