[oop] Inheritance in MTA

[Piorun]

Hi,

I want to make class which will be extended with Vehicle class in LUA. I know about OOP in other langs and I know how to create class in MTA. I did anyway inh with 2 classes made by me but I want to create class which will be extended by Vehicle class (have same methods and variables as Vehicle class and also mine vars and methods wrote by me).

[tosfera]

set the __parent towards your other class in the metatable.

[Piorun]

Can i ask you about some example? And did you test it before?

[tosfera]

I've never actually used OOP in MTA since Lua doesn't support it by default, the MTA team has created OOP theirselfs with meta tables since that was recommended by Lua itself. yet I don't feel the OOP vibe in lua and therefore I'm not using it.

An example can be found on the wiki;

-- Exposed to global environment 
Element = { 
    create = createElement, 
    setPosition = setElementPosition, 
    ... 
} 
  
Vehicle = { 
    create = createVehicle, 
    setColor = setVehicleColor, 
    ... 
} 
  
-- Hidden in lua registry, applied to userdata 
ElementMT = { 
    __index = CLuaClassDefs::Index, 
    __newindex = CLuaClassDefs::NewIndex, 
    __class = Element, 
    __call = __class.create, 
    __set = { 
        type = CLuaClassDefs::ReadOnly, 
        health = setElementHealth, 
        ... 
    }, 
    __get = { 
        type = getElementType, 
        health = getElementHealth, 
        ... 
    }, 
} 
  
VehicleMT = { 
    __index = CLuaClassDefs::Index, 
    __newindex = CLuaClassDefs::NewIndex, 
    __class = Vehicle, 
    __parent = ElementMT, 
    __call = __class.create, 
    __set = { 
        damageProof = setVehicleDamageProof 
        ... 
    }, 
    __get = { 
        damageProof = isVehicleDamageProof 
        ... 
    }, 
} 

source; https://wiki.multitheftauto.com/wiki/OOP