MTA:SA 1.4

[ixjf]

Hi,

I would appreciate if somebody could answer these two questions:

• Is there any documentation of the OOP implemented in the 1.4 release (e.g. "class" members signature)?
  
• How does a script of type "shared" work? Do we simply mix both server-side and client-side functions? How does it differentiate between the client and server files then? I know you can overload functions in C++, but would it be possible in Lua?

[qaisjp]

shared = client, server

meaning this:

  
<script src="script.lua" type="shared"/> 
  

is practically translated as

  
<script src="script.lua" type="server"/> 
<script src="script.lua" type="client"/> 

idk about the oop.

[ixjf]

Makes no sense to me to have such a type. How about function documentation?

Edited June 5, 2013 by Guest

[DakiLLa]

Not sure if developers have ever finished OOP stuff, otherwise they'd document it on the wiki, wouldn't they?

[IIYAMA]

btw what is the use of that? (I only know that it is handy for exporting)

but nothing more or less.

[50p]

OOP-wise, they're still working on it. First they want to implement OOP client-side only and then translate it to server-side. There will be useful classes that will make things easier eg. vectors and matrices for position translation. For instance freecam resource can be shrank down from ~200 lines down to ~30 lines of code, that's because of all the calculations being done with math functions; vectors and matrices makes things simple

The classes will be self explanatory, eg: Ped, Vehicle, etc. and will work the following way:

local myPed = Ped.create( 0, 0.0, 0.0, 3.0 ); -- create a CJ ped at 0,0,3 
myPed:position( 100.0, 100.0, 4.0 ); -- set myPed position to 100, 100, 4 
  
local newPos = Vector3D( -104, 140, 15 ); 
myPed:Position( newPos ); -- set new position by vector 
  
local myVeh = Vehicle( 560, 0, 0, 4 ); -- create Sultan at 0, 0, 4 
myVeh.health = 500; -- set the vehicle's health to 500 
myPed.vehicle = myVeh; -- waprs the myPed to myVeh  (waprs CJ to Sultan); 
  
localPlayer.skin = 3; -- change local player's skin to 3 

There is plenty more to describe about the new OOP but these are just simple examples I can think of.

[ixjf]

btw what is the use of that? (I only know that it is handy for exporting)

but nothing more or less.

The object-oriented paradigm turns complicated things so easy: https://en.wikipedia.org/wiki/Object-or ... rogramming

Edited June 5, 2013 by Guest

[Spajk]

I am intrestred about the "shared" thing, could anyone explain what it does exactly?

[qaisjp]

I am intrestred about the "shared" thing, could anyone explain what it does exactly?

shared = client, server

meaning this:

  
<script src="script.lua" type="shared"/> 
  

is practically translated as

  
<script src="script.lua" type="server"/> 
<script src="script.lua" type="client"/> 

idk about the oop.

OOP-wise, they're still working on it. First they want to implement OOP client-side only and then translate it to server-side. There will be useful classes that will make things easier eg. vectors and matrices for position translation. For instance freecam resource can be shrank down from ~200 lines down to ~30 lines of code, that's because of all the calculations being done with math functions; vectors and matrices makes things simple

The classes will be self explanatory, eg: Ped, Vehicle, etc. and will work the following way:

local myPed = Ped.create( 0, 0.0, 0.0, 3.0 ); -- create a CJ ped at 0,0,3 
myPed:position( 100.0, 100.0, 4.0 ); -- set myPed position to 100, 100, 4 
  
local newPos = Vector3D( -104, 140, 15 ); 
myPed:Position( newPos ); -- set new position by vector 
  
local myVeh = Vehicle( 560, 0, 0, 4 ); -- create Sultan at 0, 0, 4 
myVeh.health = 500; -- set the vehicle's health to 500 
myPed.vehicle = myVeh; -- waprs the myPed to myVeh  (waprs CJ to Sultan); 
  
localPlayer.skin = 3; -- change local player's skin to 3 

There is plenty more to describe about the new OOP but these are just simple examples I can think of.

With object chaining:

local myPed = Ped.create( 0, 0.0, 0.0, 3.0 ):position( 100.0, 100.0, 4.0 ); 

[Spajk]

I read that, but the script file is same(script.lua), so how does it know if I am calling a client or server function?

[Cadu12]

function isServer() return triggerClientEvent ~= nil end 
function isClient() return triggerServerEvent ~= nil end 
function getScriptLocation() return isServer() and "Server" or "Client" end 
  
if getScriptLocation() == "Client" then 
    -- here client 
else 
    -- here server 
end 

I got it from Race resource.

[50p]

Basically, shared files are used to define functions that can be used on both sides: client and server. For example you may have some math or table functions that work on both sides.

eg:

function table.equal( t1, t2 ) -- check if 2 tables are the same 
    for i, v in pairs( t1 ) do 
        if t2[ i ] ~= v then 
            return false; 
        end 
    end 
    return true; 
end 

This is very simple example, as you can see, this script doesn't use any MTA functions and therefore it can be used on client and server side thus "shared".