How do you refer to the player holding the gun in a SWEP?

[GModKitty]

To get the position of a player's gun barrel, I think I need to use this bit of code that I took right from the gmod wiki.

local viewm = ply:GetViewModel()
local obj = viewm:LookupAttachment( 1 )
local muzzlepos = vm:GetAttachment( obj )

First of all, I don't know how to refer to the player in a SWEP, and second of all, I don't know what the "vm" in "vm:GetAttachment()" signifies.
Can anyone tell me how to refer to players in a SWEP, and maybe clarify how to use the Entity:GetAttachment() function?

[Tomelyr]

self.Owner?

[Willox]

or self:GetOwner()

[GModKitty]

[QUOTE=Willox;47613183]or self:GetOwner()[/QUOTE]
when i do that i get this error

 
[ERROR] gamemodes/terrortown/entities/weapons/aa.lua:36: attempt to index global 'self' (a nil value)
  1. unknown - gamemodes/terrortown/entities/weapons/aa.lua:36

[Rubat]

[QUOTE=GModKitty;47613241]when i do that i get this error

 
[ERROR] gamemodes/terrortown/entities/weapons/aa.lua:36: attempt to index global 'self' (a nil value)
  1. unknown - gamemodes/terrortown/entities/weapons/aa.lua:36

[/QUOTE]

self only works inside SWEP:* functions.

[GModKitty]

function SWEP.PrimaryAttack()
local viewm = self.Owner:GetViewModel()
local obj = viewm:LookupAttachment( 1 )
local muzzlepos = vm:GetAttachment( obj )
print(muzzlepos)
end

That error still occurs in this code.

[Whiterabbit]

[QUOTE=GModKitty;47613259]

function SWEP.PrimaryAttack()
local viewm = self.Owner:GetViewModel()
local obj = viewm:LookupAttachment( 1 )
local muzzlepos = vm:GetAttachment( obj )
print(muzzlepos)
end

That error still occurs in this code.[/QUOTE]

You need to change SWEP.PrimaryAttack to SWEP:PrimaryAttack

It may be preferable use self:GetOwner(), since self.Owner just calls that anyway and has a comment about it being retired eventually [url]https://github.com/garrynewman/garrysmod/blob/4eb9bb19dcfac06007691376ecaf2dbc56efa6b2/garrysmod/lua/includes/extensions/weapon.lua#L40[/url]

[AK to Spray]

[QUOTE=GModKitty;47613259]

function SWEP.PrimaryAttack()
local viewm = self.Owner:GetViewModel()
local obj = viewm:LookupAttachment( 1 )
local muzzlepos = vm:GetAttachment( obj )
print(muzzlepos)
end

That error still occurs in this code.[/QUOTE]

You need to use a colon (SWEP:PrimaryAttack()) instead of a period (SWEP.PrimaryAttack). The weapon is automatically passed as the first argument when you do so (which is what self is).

[GModKitty]

Thank you!