Object's self field becomes first argument of the function

kercig · April 25, 2025, 5:57pm

I am using oop. I made a class but it’s object’s self becomes whatever I send to the function
for example:

Inside random script

v:GetVector3(5.5)

Inside module

function Vertex:GetVector3(y: number)
	print(self) -- returns 5.5
	return Vector3.new(self["x"], y, self["y"])
end

Vertex module


local Vertex = {}
Vertex.__index = Vertex

local sss = game:GetService("ServerScriptService")

local types = require(sss.Types) 

function Vertex.new(x: number,y: number): types.Vertex -- big triangle coordinates.
	local skeleton = {
		["x"] = x,
		["y"] = y,
		["halfedges"] = {}
	}
	setmetatable(skeleton, Vertex)
	print(skeleton)
	return skeleton
end

function Vertex:AddHalfEdge(halfedge)
	table.insert(self.halfedges,halfedge)
end

function Vertex:RemoveHalfEdge(halfedge)
	for i,v in ipairs(self.halfedges) do
		if v == halfedge then
			table.remove(self.halfedges,i)
			break
		end
	end
end

function Vertex:__add(v2)
	return Vertex.new(self.x + v2.x, self.y + v2.y)
end
function Vertex:__sub(v2)
	return Vertex.new(self.x - v2.x, self.y - v2.y)
end

function Vertex:GetVector3(y: number)
	print(self)
	return Vector3.new(self["x"], y, self["y"])
end

function Vertex:Magnitude(Vertex2)
	return math.sqrt(math.pow(Vertex2.x - self.x,2) + math.pow(Vertex2.y - self.y,2))
end

function Vertex:MidPoint(v2)
	return Vertex.new((self.x + v2.x)/2, (self.y + v2.y)/2)
end

function Vertex:Show(t,y)
	coroutine.wrap(function()
		local part = Instance.new("Part")
		part.Size = Vector3.new(1,1,1)
		part.Position = Vector3.new(self.x,y,self.y)
		part.Anchored = true
		part.Parent = workspace
		part.Material = Enum.Material.Neon
		part.Color = Color3.new(0.666667, 0, 1)
		part.CanCollide = false
		task.wait(t)
		part:Destroy()
	end)()
end


return Vertex