Entity.NetworkVar

[>>oubliet]

Entity.NetworkVar isn't overwriting functions if they already exist, is this meant to happen?

[Drakehawke]

There's no reason why it shouldn't - are you sure?

[img]http://puu.sh/2nfhY[/img]

[>>oubliet]

My code :
[lua]
ENT.Base = "base_entity";
ENT.Type = "anim";

ENT.Author = "Oubliette";

ENT.Spawnable = false;
ENT.AdminSpawnable = false;

function ENT:SetupDataTables()

self:NetworkVar( "Int", 0, "Health" );
self:NetworkVar( "Int", 1, "MaxHealth" );

self:NetworkVar( "Entity", 0, "Owner" );

self:NetworkVar( "Float", 0, "TestName" );

end
[/lua]

Proof :

> PrintTable( debug.getinfo( player.GetAll()[1]:GetEyeTrace().Entity.GetOwner ) )...
linedefined	=	-1
currentline	=	-1
func	=	function: 0x284bed60
isvararg	=	true
namewhat	=	
lastlinedefined	=	-1
source	=	=[C]
nups	=	0
what	=	C
nparams	=	0
short_src	=	[C]

> PrintTable( debug.getinfo( player.GetAll()[1]:GetEyeTrace().Entity.GetTestName ) )...
linedefined	=	241
currentline	=	-1
func	=	function: 0x28fd1b38
isvararg	=	false
namewhat	=	
lastlinedefined	=	243
source	=	@lua/includes/extensions/entity.lua
nups	=	1
what	=	Lua
nparams	=	1
short_src	=	lua/includes/extensions/entity.lua

> PrintTable( debug.getinfo( player.GetAll()[1]:GetEyeTrace().Entity.GetHealth ) )...
linedefined	=	57
currentline	=	-1
func	=	function: 0x28493c60
isvararg	=	false
namewhat	=	
lastlinedefined	=	59
source	=	@gamemodes/torrent/gamemode/core/sh_entity_meta.lua
nups	=	0
what	=	Lua
nparams	=	1
short_src	=	gamemodes/torrent/gamemode/core/sh_entity_meta.lua
]

[Drakehawke]

I think this is because of how metatables work. Basically each entity has a table associated with it, which is unique to that entity, each entity also has a metatable, but the metatable is just one table used for ALL entities.

When you index an entity (i.e. print(ent.GetWhatever)) it calls a function which does something like this (abbreviated a lot but you get the idea):

[lua]
function index( ent, key )

if metatable[ key ] then return metatable[ key ] end
if ent:GetTable()[ key ] then return ent:GetTable()[ key ] end

end
[/lua]

So you can see when you index for say, GetHealth, first it searches the main Entity metatable, it finds the C function GetHealth and returns that. When you index for say, GetTestName, it searches the main Entity metatable, [b]doesn't[/b] find any function, so it then searches the Entitys individual table, and finds the function NetworkVar created.

In short: just don't bother overwriting stuff.

[>>oubliet]

You're right. Personally I think userdata elements should have priority over parent metatables, it should only fix problems like this. I'd probably just change the __index metamethod, unless Sublime has a built in file Find & Replace function ..

[initrd.gz]

That's not how it works at all. It searches in the table you are indexing first, and if it doesn't find anything, [i]then[/i] it calls (or searches) __index.

[>>oubliet]

> player.GetAll()[1].Health = function() return 50000 end...
> print( player.GetAll()[1]:Health() )...
100

> debug.getregistry()[ "Player" ].Health = function() return 5000 end...

> print( player.GetAll()[1]:Health() )...
5000

> player.GetAll()[1].Potatoe = function() return 5000 end...

> print( player.GetAll()[1]:Potatoe() )...
5000

Apparently not.

[Drakehawke]

[QUOTE=initrd.gz;40027325]That's not how it works at all. It searches in the table you are indexing first, and if it doesn't find anything, [i]then[/i] it calls (or searches) __index.[/QUOTE]

This is how I've always thought it worked, in the next update Garry moved the Entity index function to Lua, you can see it here: [url]https://github.com/garrynewman/garrysmod/blob/master/garrysmod/lua/includes/extensions/entity.lua#L10[/url]