IIYAMA

February 2

5 hours ago, Turbe$Z said:

what wrong with the loop?

You have to index the variable veh one time less. Since the pairs loop did the first index already for you.

Quote

dxDrawText(veh~~[k]~~[1].." | "..veh~~[k]~~[2], sx/2-370,sy/2-297,sx/2,sy/2, tocolor(255, 255, 255, 220), 3, "default-bold", "left", "top", false, false, false, true )

dxDrawText(veh[1].." | "..veh[2], sx/2-370,sy/2-297,sx/2,sy/2, tocolor(255, 255, 255, 220), 3, "default-bold", "left", "top", false, false, false, true )

January 22

6 hours ago, Snow-Man said:

what confuses me that when i get table into another tables inside and when i try to get a return from what?

Sometimes it really helps when you use the iprint function to print the current table. It shows you the current depth and helps you to decide how to index the next table.

When I for example I am working with a secret table.

iprint(result)

>

{
	["test"] = {
		{
			{
				[133]="found me!"
			}
		}
	}
}

The first step is to peel it down.

Layer 1

iprint(result["test"])

>

{
	{
		{
			[133]="found me!"
		}
	}
}

Layer 2

iprint(result["test"][1])

>

{
	{
		[133]="found me!"
	}
}

Layer 3

iprint(result["test"][1][1])

>

{
	[133]="found me!"
}

Layer 4

iprint(result["test"][1][1][133])

>

"found me!"

January 21

21 hours ago, Snow-Man said:

im lost through a lot of tables

It helps if you write every table modification inside of a new function. This way you keep your code more readable.

The following examples are re-written code. You could use this as a start, but make sure to test it, because I didn't test it for you.

local farm = createFarm(123, 1, 1, 1)

local horse = createHorse(player, horseId)

local farm = getFarmFromID (123)
-- If the farm does exist
if farm then
    addHorseToFarm(horse, farm)
end

local horseCollection = {} -- all horses
local farmCollection = {} -- all farms

---@param player userdata
---@param horseId integer
---@return table
function createHorse(player, horseId)

    local horse = { id = horseId }
    horseCollection[horseId] = horse

    return horse
end

---@param farmId integer
---@param x number
---@param y number
---@param z number
---@return table
function createFarm (farmId, x, y, z)

    local marker = createMarker(x, y, z)

    local farm =  {
        marker = marker, 
        id = farmId, 
        location = { x, y, z }, 
        owner = nil, 
        creator = nil, 
        creationTime = getTickCount(), 
        price = 0, 
        horses = {}
    }

    farmCollection[farmId] = farm
    return farm
end

---@param farmId integer
---@return table|false
function getFarmFromID (farmId)
    return farmCollection[farmId] or false
end

---@param farm table
---@param player userdata
---@return table
function setFarmCreator (farm, player)
    farm.creator = player
    return farm
end

---@param horse table
---@param farm table
function addHorseToFarm (horse, farm)
    table.insert(farm, horse)
end

---@param horse table
---@param farm table
---@return boolean
function isHorseInFarm(horse, farm)
    for i=1, #farm do
        if farm[i] == horse then return true end
    end
    return false
end

---@param farmId integer
---@return boolean
function doesFarmExist(farmId)
    return farmCollection[farmId] and true or false
end

January 21

@Wasilij0814

You might want to leave a reply, even if you were not able to solve your issue with my response.

January 17

On 16/01/2024 at 04:44, Wasilij0814 said:

Hi guys i need help for this problem solving

Quote

GROUPS (R); added in 8.0.2 (reserved)

https://dev.mysql.com/doc/mysqld-version-reference/en/keywords-8-0.html

groups is a reserved keyword in MySQL: 8.0.2

Change:

SELECT * FROM groups

to

SELECT * FROM `groups`

You probably will have to fix the other queries as well.

December 28, 2023

Lua Language Server - Definition files

The Lua language server is a powerful tool that enhances the development experience for Lua programming. It provides a comprehensive set of code editing features, including suggestions, auto-completion, and error checking. With the Lua language server, developers can effortlessly navigate through their resource files, access documentation easily, and ensure code correctness by giving warnings.

Why should you care?

The language server will inform you about all sorts of problems: type mismatches, missing function arguments, missing variables, etc.
You have access to a lot of MTA syntax/autocomplete out of the box. The syntax information will remain while writing.
You do not have to restart your resource so often in order to validate if everything is working.

Type validation

Having value type validation in your code editor is one of the main key features of the Lua Language Server. When working with variables, parameters, and arguments in Lua, you are not restricted to specific value types. This flexibility can make mistakes more likely to happen. However, being able to validate those mistakes instantly saves you a lot of time and frustration.

Spoiler

In the following example, we will be discussing type validation.

The code snippet below places a random player at the position (0, 0, 20).

local player = getRandomPlayer()

setElementPosition(player, 0, 0, 20)

However, an issue arises as I receive the following warning:

Cannot assign `userdata|false` to parameter `userdata`.

- `false` cannot match `userdata`

- Type `false` cannot match `userdata`

(param-type-mismatch)

In this example, `userdata` represents a MTA element. The `setElementPosition` function expects to receive a `userdata` (element) type, but it is receiving either `userdata` or `false` type.

Let's analyze the `getRandomPlayer` function:

When I place my cursor on the `getRandomPlayer` function, you can see that it returns `false` when there are no players on the server. Therefore, the `player` variable can contain either a player `userdata` or `false`, depending on the player count.

userdata false

To resolve this warning, we can add an `if` statement to check if the `player` variable has a value that is not `nil` and not `false`.

local player = getRandomPlayer()
if player then
    setElementPosition(player, 0, 0, 20)
end

Now, only the player `userdata` is accessible within the `if` statement. userdata ~~false~~

Type annotations for your own functions

Adding type annotations to your own functions can help improve validation and catch logic mistakes. It is particularly useful when calling functions from different parts of your code, as the annotations provide clarity on the expected input (arguments) and output (return values).

Additionally, comments that are placed above or adjacent to a variable or function are visible when hovering over them in another file or line. This can provide helpful information and context when working with the code.

How that looks like:

How can I quickly add annotations in less than a second? Open the spoiler:

Spoiler

Starting with a basic function.

Spoiler

function sum (a, b)
    return a + b
end

Typing --- lines before the function name, will show this option.

Press enter

Spoiler

---comment
---@param a any
---@param b any
---@return unknown
function sum (a, b)
    return a + b
end

Fill in the comment if you want. (optional)

Press tab to go to the next one.

Type number for a and b

And return a number as well.

Final result:

Spoiler

---@param a number
---@param b number
---@return number
function sum (a, b)
    return a + b
end

When you hover over the sum function, you can see that it takes in 2 numbers and returns 1.

Adding these annotations can take less than 1 second of your time (that is if you auto complete also the type's).

What did we gain from our previous work?

The first benefit is showing us a warning if you are missing any required arguments.

The second one is showing us a warning about a type mismatches.

For example if we have this code:

local inputA = 123
local inputB = "123"
sum(inputA, inputB)

The editor will warn us when we are using a string in our sum function.

Lets quickly fix that and return our result.

local inputA = 123
local inputB = 123
local result = sum(inputA, inputB)

Now lets make another mistake.

This time we want to enable birds when the result is higher than 10. Before we added the annotation, you wouldn't have noticed the mistake below.

local inputA = 123
local inputB = 123
local result = sum(inputA, inputB)

setBirdsEnabled(result)

This warning indicates that the setBirdsEnabled function expects a boolean on it's first argument. But we gave it a number, which resulted in an angry . I mean a warning... ughm.

Lets fix that as well:

local inputA = 123
local inputB = 123
local result = sum(inputA, inputB)

setBirdsEnabled(result > 10) -- Operators: https://www.lua.org/pil/3.2.html

AddEventHandler auto-complete

Most MTA addEventHandler functions have full eventName autocompletion. And the attached anonymous function is fully autocompleted and typed as well.

Spoiler

`eventName`
`attachedTo` element
Function
When clicking on fun(weapon: 0|1|10|11|12... (screenshot above), it will autocomplete an anonymous function with all parameters:
Hovering over the parameters:

Navigation features of Lua Language Server

It can be time consuming to find out where a (global) function or variable is located. Being able to jump right to it, saves you a lot of time.

Spoiler

Go to Definition: Developers can quickly jump to the definition of a function, variable, or class within their codebase, allowing for easy exploration and understanding of code structure. (vscode: right click > Go to Definitions)
Find References: The Lua language server enables developers to locate all the places where a specific function, variable, or class is referenced throughout their code. (vscode: right click > Go to References)
Symbol Search: With the Lua language server, developers can quickly search for specific symbols (such as functions or variables) within their codebase. (vscode: ctrl + t)

Other information which you can find in the readme

Known issues

Make sure to always have an empty new line at the end of your files, as recommended in this issue.
Currently, the Lua server language definition files do not have a clear separation between serverside functions/events and clientside functions/events. However, it is possible to enforce this separation for specific functions if needed.
```
outputChatBox--[[@as outputChatBox_server]]("Serverside", player)
```
In certain cases, certain functions in the Lua server language definition files may return multiple types, even if you have selected a different syntax. To handle this situation, you can use the `cast` or `as` notation to explicitly specify the desired type or adjust the returned type. See `Casting and as` syntax below.

Casting and as

In certain situations, you may have a strong understanding of the type(s) that a variable or expression will have. This is where the keywords "cast" and "as" come into play. These keywords enable you to explicitly specify the intended type, ensuring proper type handling.

local varName = exampleFunc()
---@cast varName string

Spoiler

local varName = exampleFunc()
---@cast varName string | number

local varName = exampleFunc() --[[@as string]]

local varName = exampleFunc() --[[@as string | number]]

Download

The definition files can be downloaded here.

December 27, 2023

45 minutes ago, JamesDragon said:

Can i also send arguments to the function?

Yes, as long as you do not break the code.

<script>
	function onRemotePlayerWasted (arg) {
		/* ... */
	}
</script>

addEventHandler("onClientPlayerWasted", root, 
function ()
	local arg = 123 -- Or string "\"123\"" | "'123'" | '"123"' | [["123"]]
	--[[ 
		Or table through JSON: local arg = '`' .. toJSON({}) .. '`'
		In JS: const result = JSON.parse(arg)
	]]
	executeBrowserJavascript(browser, [[onRemotePlayerWasted(]] .. arg .. [[);]])
end)

*adjusted JSON example, Must be tested through trial and error.

December 27, 2023

39 minutes ago, JamesDragon said:

f i want for exemple execute a js function when a lua event happen

For example you have an html file with:

<script>
	function onRemotePlayerWasted () {
		/* ... */
	}
</script>

And you inject the following JavaScript to call the function.

addEventHandler("onClientPlayerWasted", root, 
function ()
	executeBrowserJavascript(browser, [[onRemotePlayerWasted();]])
end)

December 27, 2023

2 hours ago, JamesDragon said:

i work on a ui panel using html

You could try something like this.


-- See https://wiki.multitheftauto.com/wiki/ExecuteBrowserJavascript for the rest of browser the code

function reloadList (browser)
    local list = {
        "a",
        "b"
    }

    local htmlItems = {}
    for index, value in ipairs(list) do
        table.insert(htmlItems, [[<li>]] .. value .. [[</li>]])    
    end

    local js = [[{
        const list = document.createElement("ul")
        list.innerHTML = `]] .. table.concat(htmlItems, "\n") ..  [[`;
        document.body.append(list);
    }]]

    executeBrowserJavascript(browser, js)
end

addEventHandler("onClientBrowserDocumentReady", browser,
function ()
    reloadList (source)
end)

See: https://wiki.multitheftauto.com/wiki/OnClientBrowserNavigate when having different pages

December 27, 2023

There is also the executeBrowserJavascript function used to inject JavaScript in to the browser (browser with local context only).

December 22, 2023

5 hours ago, Sr.black said:

If you want can you change the terms of the winner of the war? the team that kills the largest number in the war zone is the winner and the color of the winning team is determined for the four gangs in the war set the winning teams color area

Having very complex winning conditions also makes it harder for your players to understand. Maybe it is for the best to keep things simple.

December 21, 2023

3 hours ago, Sr.black said:

Unfortunately after my experience of attacking the areas of all other gangs I discovered the same problem

Something I like to do it is logging the current situation.

playerCount in the area (of all teams)
score
winner

And then go manually through the system with the current situation until you find the issue.

December 20, 2023

12 hours ago, Sr.black said:

I hope you have understood my problem

I took a look at it. But I am not sure if I understand all the rules.

One thing that I can suggest to make it more readable:

local example = {
	["Grove Street"] = function (score, playerCount)
		-- Aztecas or Vagos
		if score > 0 and (playerCount["Aztecas"] > 0 or playerCount["Vagos"] > 0) and playerCount["Aztecas"] ~= playerCount["Vagos"] then
			if playerCount["Aztecas"] > playerCount["Vagos"] then 
				return "Aztecas"
			end
			return "Vagos"
		end
		-- or Ballas
		if score > 0 and playerCount["Ballas"] > 0 or playerCount["Grove Street"] == 0 then
			return "Ballas"
		end
		-- or Grove Street
		return "Grove Street"
	end
}

-- local winner = example[areaTeam](score, playerCount)

December 20, 2023

6 hours ago, pixel77 said:

The old triggerServerEvent validating still working or not?

It does.

The new method is a utility function, which does everything for you. But also for some parts it forces you to be more strict. For example the: protectedKeys table part.

6 hours ago, pixel77 said:

            -- The source for this event is always 'resourceRoot'
            if source ~= resourceRoot then
                reportNaughtyness( eventName, client, "source" )
                return
            end

For resourceRoot you can also block this, instead of reporting. Saves you some lines of code.

addEvent("onRaiseTheRoof", true)
addEventHandler("onRaiseTheRoof", resourceRoot,
function(arg1, arg2)

end, false) -- propagate disable, making sure only resourceRoot can be passed as the source

December 16, 2023

On 13/12/2023 at 17:50, FlorinSzasz said:

and add a 3d line to it to see where they aim.

Bullets do not start from the weapon Muzzle position.

The start position is:
https://wiki.multitheftauto.com/wiki/GetPedTargetStart

And the end position:
https://wiki.multitheftauto.com/wiki/GetPedTargetEnd

Both can be used to create a vector for the line you are referring to.

This is related to the reason why people can shoot around corners without showing more than their elbows. Since the bullets start more to the right of the weapon.

November 30, 2023

5 hours ago, kajahun said:

I have an achievement list store in the scripts. How can I store the completed achievements for the users in the SQL?

As roaddog mentioned, toJSON is the easiest way to dynamic store data. But keep an eye on the limitations of JSON. Only store JavaScript structured default {} objects or [] arrays, nothing in between! (else it will be converted to the default {} object variant)

5 hours ago, kajahun said:

Maybe a third connection table? Because it is a many-to-many connection

This would be the most space saving solution. Depending on the amount of players you receive every day, it might be a better solution when there are a lot. Just keep in mind that it will be more work.

November 19, 2023

20 minutes ago, FlorinSzasz said:

I want to see your money every 20 - 30 seconds and from 1000$ you go to 999999999$ something is wrong.

If you are worrying about performance, in that case you might consider using MySQL triggers. Those are as close as it gets to your db, making sure you do not cause overhead and align the value-checks with the update moments.

https://dev.mysql.com/doc/refman/8.0/en/trigger-syntax.html

Create a value-check table / rollback table:
1. Stores the value that it is being incremented (within 30 seconds)
2. Stores the future time, when elapse the incrementing value can be ignored and resets to 0
Create a trigger which triggers on update
1. Do behaviour of value-check table.
2. If the value jumps too much UP:
  1. Report to a separate table
  2. Freeze account
  3. Rollback manually / automatic (not recommended)

November 19, 2023

2 hours ago, FlorinSzasz said:

I wonder what method should i use ?

Preventing is better than checking for unusual values. Especially when you can't don't keep track of how they have been changed. This could have been done by an exploit instead of real cheats. I personally consider exploiting almost cheating, since the developers should be responsible to deliver decent code.

Back to the subject:

Value changes in databases are often done by user input. This should be your primary objective.

For example if you have a marker that opens a GUI to transfer money:

addEvent("onPlayerTransferMoney", true)
addEventHandler("onPlayerTransferMoney", resourceRoot,
function (marker, transferAccountId)
	-- Possible cheating? = hard returns
	if not isElement(marker) then return end
	
	local playerX, playerY, playerZ = getElementPosition(client)
	local markerX, markerY, markerZ = getElementPosition(marker)
	if getDistanceBetweenPoints3D ( playerX, playerY, playerZ, markerX, markerY, markerZ ) > 10 then return end
    
	-- More user friendly returns
	if not checkPassiveTimer("event:onPlayerTransferMoney", client, 1000) then return outputChatBox(client, "You can only transfer money every 1 sec.") end -- Source code: https://wiki.multitheftauto.com/wiki/CheckPassiveTimer
	if not transferAccountId then return end
    
	-- resume operations
    
	--
end)

Check if marker exist
Check if player is close enough to the marker
Limit execution speed (else users can create database lag by spamming the UI button)

Building an anti cheat system to check for anomalies in your database should be a secondary objective.

In this case you could start with defining limits. For example a money limit. A soft limit to detect possible cheating and a hard limit to define the impossible.

For a soft limit you only report to yourself, as it might be very active player.

And for a hard limit, you could for example freeze the money. In this case you could inform the user that you are investigating the issue. > As you might not know if the user itself is responsible for the anomaly or if another user is responsible. That user could also be helpful in finding/knowing the exploit that is responsible for the anomaly.

November 8, 2023

51 minutes ago, hendawh said:

From what you wrote I understand that I should create and export the dbResponse() function in each resource that performs a database query at some point?

Yes, in every resource that is receiving data from the database manager, you should add an export function with the name dbResponse.
(it is important that the name 'dbResponse' is used consistent)

November 7, 2023

19 hours ago, hendawh said:

You mentioned that I should prepare two functions (including one in a separate resource) and I don't understand what you meant.

A - Resource requesting data

B - Database manager

A > B

The first export function is db_query, located in resource B, which you have already created.

-- Resource A makes this call to resource B
exports.database_connection:db_query(id, "SELECT * FROM `players`")

<!-- Resource B -->
<export function="db_query" type="server" />

Spoiler

-- Resource B
function db_query(id, ...)
	-- The source resource that made this call (important to rename the pre-defined variable, else it will be lost)
	local theSourceResource = sourceResource
  
	if (db_settings.db_connection) then
		dbQuery(function(query_handle)
			local result, num_affected_rows, last_insert_id = dbPoll(query_handle, 0)


			call( theSourceResource, "dbResponse", id,  result, num_affected_rows, last_insert_id )

		end, db_settings.db_connection, ...)
	end
end

B > A

The second one is dbResponse, located in resource A, which is where the response is returned to, with:

-- Resource B makes this call to resource A
call( theSourceResource, "dbResponse", id,  result, num_affected_rows, last_insert_id )

<!-- Resource A -->
<export function="dbResponse" type="server" />

-- Resource A
function dbResponse (id, ...)
	if not callbacks[id] then return end
	callbacks[id](...)
end

Not sure if you want to keep your function naming style, else it will be db_response ofcourse.

November 5, 2023

49 minutes ago, hendawh said:

Any help?

The following examples are part of a project I have build before.

You will have to set-up:

2 export function (one each resource)
- For sending (as you have now)
- And for receiving

You will have to generate an unique identifier for each query, so that each request can be wired back to where you want the data.

-- Resource A
Identifier = {}
function Identifier:newGenerator() return setmetatable( { index = 0 }, { __index = Identifier } ) end
function Identifier:generate()
  local index = self.index + 1
  self.index = index
  return "id:" .. getTickCount() .. "|" .. index
end

-- For new ID's
local identifierGenerator = Identifier:newGenerator()

-- function ()

	local id = identifierGenerator:generate()

-- end

Before you send a request you make sure that there is a destination:

-- Resource A
callbacks = {}
-- function ()
	local id = identifierGenerator:generate()
	
	-- Set-up the callback destination, anonymous func if you want to keep going where you left of.
	callbacks[id] = function (...)
  		iprint(...)
	end
	exports.database_connection:db_query(id, "SELECT * FROM `players`")
	

-- end

Add wiring for receiving and calling back your callback function:

-- Resource A

function dbResponse (id, ...)
	if not callbacks[id] then return end
	callbacks[id](...)
end

Keep the wiring going in the db resource, so that the ID goes ping pong:

-- Resource B
function db_query(id, ...)
	-- The source resource that made this call (important to rename the pre-defined variable, else it will be lost)
	local theSourceResource = sourceResource
  
	if (db_settings.db_connection) then
		dbQuery(function(query_handle)
			local result, num_affected_rows, last_insert_id = dbPoll(query_handle, 0)


			call( theSourceResource, "dbResponse", id,  result, num_affected_rows, last_insert_id )

		end, db_settings.db_connection, ...)
	end
end

October 21, 2023

9 hours ago, Ryuto said:

I also wanted to ask if it is possible to change the default fire color, without affecting the original fire.

Not sure about replacing it without affecting the original fire.

But if you look closely at the fire animations, you can see that it exist out of 2x > 2D animations. Each of them starts at one of the feet.

Which you could draw with: dxDrawMaterialLine3D (that is if you have the frames or a shader)

Note: Too much of those calls can be demanding, make sure to optimise the textures.

Please consider replying on your other topic.

October 21, 2023

5 hours ago, MGO said:

if anyone knows any solution plz help.

Just move the text by 1 pixel:

local borderSize = 1
dxDrawText(v.text, sx - (0.5 * width) - borderSize, yPos, sx - (0.5 * width) - borderSize, yPos - (i * fontHeight), tocolor(0,0,0), 1, font, "left", "top", false, false, false)
dxDrawText(v.text, sx - (0.5 * width) + borderSize, yPos, sx - (0.5 * width) + borderSize, yPos - (i * fontHeight), tocolor(0,0,0), 1, font, "left", "top", false, false, false)
dxDrawText(v.text, sx - (0.5 * width) - borderSize, yPos, sx - (0.5 * width) + borderSize, yPos - (i * fontHeight), tocolor(0,0,0), 1, font, "left", "top", false, false, false)
dxDrawText(v.text, sx - (0.5 * width) + borderSize, yPos, sx - (0.5 * width) - borderSize, yPos - (i * fontHeight), tocolor(0,0,0), 1, font, "left", "top", false, false, false)

dxDrawText(v.text, sx - (0.5 * width), yPos, sx - (0.5 * width), yPos - (i * fontHeight), tocolor(unpack(v.color)), 1, font, "left", "top", false, false, false)

October 19, 2023

17 hours ago, Ryuto said:

I'm sorry to reopen this post again but I have a question.

Is there a way to detect if the player is being selected from another external script so I can execute a function?

Yes, you use the event system for that.

--[[
	Ⓒ FLUSHBICEPS
]]

addEventHandler("onClientKey", root,
	function(button, press)
		if not press then return end
		if button == "mouse_wheel_up" then
			selectedIndex = selectedIndex - 1
			if selectedIndex < 1 then
				selectedIndex = #nearbyPlayers
			end
		elseif button == "mouse_wheel_down" then
			selectedIndex = selectedIndex + 1
			if selectedIndex > #nearbyPlayers then
				selectedIndex = 1
			end
		else return end

		local selectedPlayer = nearbyPlayers[selectedIndex]
		if not isElement(selectedPlayer) then return end
		triggerEvent("onClientSelectPlayer", selectedPlayer, selectedIndex)
    end
)

addEvent('onClientSelectPlayer', false)
addEventHandler('onClientSelectPlayer', root, 
function (selectedIndex)
	iprint('Player-element:', source, ', index:', selectedIndex)
end)

October 14, 2023

32 minutes ago, Ryuto said:

What functions could I use?

It is not possible at the moment with the help of gravity functions, because there is only a gravity function for vertical for non vehicle elements.

That being said, you might be able to fake it. With some inspiration from the superman resource. But it will not be easy.

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Posts posted by IIYAMA

[Help] what wrong with this loop?

Need help on creating horse

Need help on creating horse

dbPoll failed

dbPoll failed

Lua Language Server - Definition files

Js to Lua and Lua to Js

Js to Lua and Lua to Js

Js to Lua and Lua to Js

Js to Lua and Lua to Js

[HELP] Fix The Script

[HELP] Fix The Script

[HELP] Fix The Script

Anti-cheat question/advice?

Anti-cheat question/advice?

In SQL how to store many data to one field?

Anti-cheat question/advice?

Anti-cheat question/advice?

How to obtain async dbPoll result?

How to obtain async dbPoll result?

How to obtain async dbPoll result?

[HELP] Aura Effect

Problem with dxdrawtext

[HELP] Target marking system

[HELP] Wall walking system

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