Help me here Class on Lua.

[Yue]

CWorld=
{
	world=nil,
}

function CWorld:Create()
	self.world = World:Create()
	local this={}
	this.world = nil
	World:SetCurrent(self.world)
	function this:GetCurrent()
		return(World:GetCurrent())
		
	end

	function this:GetWorld()
		return(CWorld.world)
	end

	return(this)
	
end

menu = CWorld:Create()
map = Map:Load("Maps/menu.map")

mars = CWorld:Create()
map2 = Map:Load("Maps/testMap.map")

System:Print(mars:GetWorld()) -- x085x
System:Print(menu:GetWorld()) -- x085x

I am trying to get this to work, but it turns out that when I try to retrieve the world, it returns two identical values, even though I have created two worlds. what am I doing wrong?

 

[Yue]

CWorld=
{

	worldx=nil,

}
function CWorld:Create()

	self.worldx = World:Create()


	
	return(self)

end


mundo1 = CWorld:Create()
mundo2 = CWorld:Create()

System:Print(mundo1.worldx)
System:Print(mundo2.worldx)

Something simpler.

[Genebris]

How do you know they are the same world? Maybe System:Print gives you the same output for different worlds. Try to spawn something in one world and render another.

 

Also, what if you do this?

mundo1 = CWorld:Create()
System:Print(mundo1.worldx)

mundo2 = CWorld:Create()
System:Print(mundo2.worldx)

 

[Yue]

I'm trying to understand this Lua class thing, apparently it's a static variable.  Evidently it's the same world because I can't find a way to change it. So what I am doing is looking at the Lua documentation regarding tables, where although you can create objects, the term class does not exist, and what you do is to use a prototype of an object to create others.

[Yue]

CWorld= {
	w =nil,
	
	Create = function(self,wc)
		this={}
		setmetatable(this,self)
		self.__index = self

		self.w = wc

		return(this)

	end




}


local world1 = CWorld:Create(World:Create())
local world2 = CWorld:Create(World:Create())

System:Print(world1.w)
System:Print(world2.w)

I can't understand this, I go back to the same world, when they should be two different worlds. This has a problem because I am dealing with the OOP paradigm, that is to say that when I try to change the rendering world I will always have the same one, no matter the object.

[Yue]

Ok, solved here.

 

CWorld= {
	world =nil,
	
	Create = function(self)
		this={}
		setmetatable(this,self)
		self.__index = self
	
		function this:Start()

			self.world = World:Create()
		end


		
		this:Start()
		return(this)

	end




}


local world1 = CWorld:Create()
local world2 = CWorld:Create()

System:Print(world1.world)
System:Print(world2.world)

 

[Yue]

A more correct approach to object programming.

 

CWorld= {
	world =nil,
	
	Create = function(self)
		this={}
		setmetatable(this,self)
		self.__index = self
	
		function this:Start()

			self.world = World:Create()
		end

		function this:GetWorld()
			return(self.world)
		end

		
		this:Start()
		return(this)

	end




}


local world1 = CWorld:Create()
local world2 = CWorld:Create()

System:Print(world1:GetWorld())
System:Print(world2:GetWorld())