Very confusing situation

Help and Feedback Scripting Support
#1

Hey,

Basically, I make a wall using a matrix and then create a primary part in the middle and weld everything together with that primary part:

-- Need to reset the matrix when respawned.

local ReplicatedStorage = game:GetService "ReplicatedStorage"

local Component = require(ReplicatedStorage.Packages.Component)

local Assets = ReplicatedStorage:WaitForChild("Assets")

local Wall = Component.new {
    Tag = "Wall"
}

function Wall:Construct()
    self.Rows = 2
    self.Columns = 12
    self.Sparsity = .7

    self.CenterPosition = nil

    self.Matrix = {}
end

function Wall:GenerateRandom(): number
    return math.random() > self.Sparsity and 1 or 0
end

function Wall:GenerateMatrix()
    for I = 1, self.Rows do
        self.Matrix[I] = {}

        for J = 1, self.Columns do
            self.Matrix[I][J] = self:GenerateRandom()
        end
    end
end

function Wall:Start()
    self:GenerateMatrix()

    for I = 1, self.Rows do
        for J = 1, self.Columns do
            if self.Matrix[I][J] == 1 then
                local CrackedCrate = Assets.CrackedCrate:Clone()
                CrackedCrate.Position = Vector3.new((J - 1) * CrackedCrate.Size.X, (I - 1) * CrackedCrate.Size.Y, 0)
                CrackedCrate.Parent = self.Instance
            else
                local Crate = Assets.Crate:Clone()
                Crate.Position = Vector3.new((J - 1) * Crate.Size.X, (I - 1) * Crate.Size.Y, 0)
                Crate.Parent = self.Instance
            end
        end
    end

    self.CenterPosition = self.Instance:GetBoundingBox()

    local PrimaryPart = Instance.new("Part")
    PrimaryPart.Transparency = 1
    PrimaryPart.Anchored = true
    PrimaryPart.CanCollide = false
    PrimaryPart.CFrame = self.CenterPosition
    PrimaryPart.Parent = self.Instance
    self.Instance.PrimaryPart = PrimaryPart

    for _, Crate in self.Instance:GetChildren() do
        if Crate.Name ~= "Part" then
            local Weld = Instance.new("WeldConstraint")
            Weld.Part0 = PrimaryPart
            Weld.Part1 = Crate
            Weld.Parent = PrimaryPart
        end
    end
end

function Wall:Stop()
    self.Matrix = {}
end

return Wall

In my round module, I pick a random thing from a folder to be spawned in (e.g. the wall). However, for some reason it says that the primary part is nil? Why would it be nil, I have no idea. Thus, my odd situation.

local ReplicatedStorage = game:GetService "ReplicatedStorage"

local Knit = require(ReplicatedStorage.Packages.Knit)
local Trove = require(ReplicatedStorage.Packages.Trove)

local Templates = ReplicatedStorage:WaitForChild("Templates"):GetChildren()

local RoundService = Knit.CreateService {
    Name = "RoundService",

    _Trove = Trove.new(),
}

function RoundService:_RandomObstacle()
	return Templates[math.random(1, #Templates)]
end

function RoundService:StartRound()
    local Object = self:_RandomObstacle():Clone()
    print(Object.PrimaryPart) -- nil???
    Object.Parent = workspace
	
	self._Trove:Add(Object)
end

function RoundService:EndRound()
    self._Trove:Clean()
end

function RoundService:KnitStart()
    self:StartRound()
end

return RoundService

Any help is help, thank you.

#2

Sorry to bump this up, but I have yet to find any solution to my problem.

#3

Are you using an Instance that supports the PrimaryPart variable?
Model.PrimaryPart.

#4

Yes, I am using a model and creating a primary part in there.