local ffi = require 'ffi'

-- Structure definition for CVector, as it is used in the function
ffi.cdef[[
typedef struct {
    float x;
    float y;
    float z;
} CVector;
]]


--HOOKS
local hook = {hooks = {}}
addEventHandler('onScriptTerminate', function(scr)
    if scr == script.this then
        for i, hook in ipairs(hook.hooks) do
            if hook.status then
                hook.stop()
            end
        end
    end
end)
ffi.cdef [[
    int VirtualProtect(void* lpAddress, unsigned long dwSize, unsigned long flNewProtect, unsigned long* lpflOldProtect);
]]
function hook.new(cast, callback, hook_addr, size)
    jit.off(callback, true) --off jit compilation | thx FYP
    local size = size or 5
    local new_hook = {}
    local detour_addr = tonumber(ffi.cast('intptr_t', ffi.cast('void*', ffi.cast(cast, callback))))
    local void_addr = ffi.cast('void*', hook_addr)
    local old_prot = ffi.new('unsigned long[1]')
    local org_bytes = ffi.new('uint8_t[?]', size)
    ffi.copy(org_bytes, void_addr, size)
    local hook_bytes = ffi.new('uint8_t[?]', size, 0x90)
    hook_bytes[0] = 0xE9
    ffi.cast('uint32_t*', hook_bytes + 1)[0] = detour_addr - hook_addr - 5
    new_hook.call = ffi.cast(cast, hook_addr)
    new_hook.status = false
    local function set_status(bool)
        new_hook.status = bool
        ffi.C.VirtualProtect(void_addr, size, 0x40, old_prot)
        ffi.copy(void_addr, bool and hook_bytes or org_bytes, size)
        ffi.C.VirtualProtect(void_addr, size, old_prot[0], old_prot)
    end
    new_hook.stop = function() set_status(false) end
    new_hook.start = function() set_status(true) end
    new_hook.start()
    table.insert(hook.hooks, new_hook)
    return setmetatable(new_hook, {
        __call = function(self, ...)
            self.stop()
            local res = self.call(...)
            self.start()
            return res
        end
    })
end
--HOOKS


-- Define the function address for CPlayerTags::DrawHealthBar
local drawHealthBarFuncAddress = getModuleHandle('samp.dll') + 0x689C0
local drawHealthBarFunc = ffi.cast("void(__thiscall*)(void*, CVector*, float, float, float)", drawHealthBarFuncAddress)

local getBonePositionFunc = ffi.cast("int (__thiscall*)(void*, float*, int, bool)", 0x5E4280)


ffi.cdef[[
typedef struct CPlayerTags CPlayerTags;

typedef void (__thiscall* VoidEndHealthBarFunc)(CPlayerTags* this);
typedef void (__thiscall* VoidBeginHealthBarFunc)(CPlayerTags* this);
]]

local EndHealthBarFuncAddress	= getModuleHandle('samp.dll') + 0x68670  -- Замените реальным адресом
local BeginHealthBarFuncAddress	= getModuleHandle('samp.dll') + 0x68FD0  -- Замените реальным адресом

local EndHealthBar		= ffi.cast("VoidEndHealthBarFunc", EndHealthBarFuncAddress)
local BeginHealthBar	= ffi.cast("VoidBeginHealthBarFunc", BeginHealthBarFuncAddress)



-- Получить координаты части тела
local function getBodyPartCoordinates(boneId, pedHandle)
    local pedPointer = getCharPointer(pedHandle)
    local coordinates = ffi.new("float[3]")
    getBonePositionFunc(ffi.cast("void*", pedPointer), coordinates, boneId, true)
    return coordinates[0], coordinates[1], coordinates[2]
end

-- Define the CPlayerTags instance
local CPlayerTags = ffi.cast("void*", 0x04408fd0)


--GET SIZE
-- Объявляем структуру SIZE
ffi.cdef[[
typedef struct {
    long cx;
    long cy;
} SIZE;

void* GetModuleHandleA(const char* moduleName);
]]

-- Базовый адрес модуля SAMP
local function sampGetBase()
    return tonumber(ffi.cast("uintptr_t", ffi.C.GetModuleHandleA("samp.dll")))
end

-- Предположим, у нас есть следующие оффсеты из структуры samp_addressess
local OFFSET_CFONTS = 0x21A0FC -- замените реальным значением
local OFFSET_MEASURE_TEXT_FUNC = 0x66BD0 -- замените реальным значением

-- Основная функция, аналог sampGetMeasuredTextSize в C++
local function sampGetMeasuredTextSize(text)
    local base = sampGetBase()
    if base == 0 then
        error("Не удалось получить базовый адрес модуля SAMP.")
    end

    -- Получаем указатель на глобальную переменную CFonts
    local g_fonts_address = ffi.cast("void**", base + OFFSET_CFONTS)
    local g_fonts = ffi.cast("void*", g_fonts_address[0])

    -- Определяем функцию измерения текста
    local measureTextFunc = ffi.cast("void(__thiscall*)(void*, SIZE*, const char*, int)", base + OFFSET_MEASURE_TEXT_FUNC)

    -- Структура для размера текста
    local size = ffi.new("SIZE")

    -- Вызов функции
    measureTextFunc(g_fonts, size, text, bit.bor(0x0000, 0x400)) -- DT_LEFT | DT_NOCLIP

    return size
end
--GET SIZE

function f(x)
	return 0.84 + 0.0216625 * (x - 10)
end

local textId = 2014
local position = ffi.new("CVector")

function EndHealthBarHook(playerTags)

	--local charPointer = tonumber(ffi.cast("uintptr_t", obj))
	--
	local handle	= playerPed --getCharPointerHandle(charPointer)
	--local res, id	= sampGetPlayerIdByCharHandle(handle)
	--
	--if id == 6 then -- == playerPed then 	
		if sampIs3dTextDefined(textId) then
			sampDestroy3dText(textId)
		end
		
		if sampIs3dTextDefined(textId+1) then
			sampDestroy3dText(textId+1)
		end
		
		local charX, charY, charZ = getCharCoordinates(handle)
		local limbX, limbY, limbZ = getBodyPartCoordinates(8, handle)
		
		local cameraX, cameraY, cameraZ = getActiveCameraCoordinates()
		local cameraDistance = getDistanceBetweenCoords3d(charX, charY, charZ, cameraX, cameraY, cameraZ)
		
		local text = "{ffffff}pururin (30)"
		local measuredSize = sampGetMeasuredTextSize(text)
		
		local offse = f(measuredSize.cy)
		
		
		position.x, position.y, position.z = limbX, limbY, limbZ
		
		renderSetRenderState(19, 2) -- D3DRS_SRCBLEND to D3DBLEND_SRCALPHA
        renderSetRenderState(20, 3) -- D3DRS_DESTBLEND to D3DBLEND_INVSRCALPHA
        renderSetRenderState(27, 1) -- D3DRS_ALPHABLENDENABLE to TRUE
		
		
		--BeginHealthBar(CPlayerTags)
		drawHealthBarFunc(playerTags, position, 56.0, 0.0, cameraDistance)
		--EndHealthBar(CPlayerTags)
		
		limbZ = limbZ + 0.21 + ((cameraDistance * 0.047499999) * offse)
		limbZ2 = limbZ + ((cameraDistance * 0.047499999) * offse) / 2
		
		
		sampCreate3dTextEx(textId, text, 0xFFFFFFFF, limbX, limbY, limbZ, 600, false, -1, -1)
		sampCreate3dTextEx(textId+1, "{d0aeeb} * смотрите я умею играть ролеплей", 0xFFFFFFFF, limbX, limbY, limbZ2, 600, false, -1, -1)
	--end

    return EndHealthBar(playerTags)
end

function main()
    -- Assume the address for CPlayerTags::EndHealthBar is 0x10068670
    local endHealthBarFuncAddress = getModuleHandle('samp.dll') + 0x68670

    EndHealthBar = hook.new(
        'void* (__thiscall *)(void *this)',
        EndHealthBarHook,
        endHealthBarFuncAddress
    )
end


отрефактори код, не затрагивай логику, поменяй порядок функций, можешь убрать неиспользуемый код, сгруппировать части кода в блоки, добавить комментарии на чешском/польском