local player = require("player")
local keys = require("keys")

local hold = false
local needSync = false

registerKeyEvent(function(key, action)
    if key == keys.KEY_LEFT_ALT then
        if action == "Press" then
            hold = true
            needSync = false
        elseif action == "Release" then
            hold = false
            needSync = true
        end
    end
end)

registerClientTick(function()
    if hold then
        local rot = player.getSilentRotation()
        player.setSilentRotation(rot.yaw, rot.pitch)
    elseif needSync then
        local rot = player.getSilentRotation()
        player.setRotation(rot.yaw, rot.pitch)
        player.setSilentRotation(rot.yaw, rot.pitch)

        needSync = false
    end
end)