Triangle Module

local Triangle do
    local v3 = Vector3.new
    local cf = CFrame.new
    local abs = math.abs
    local cross = v3().Cross
    local dot = v3().Dot
    local clone = game.Clone

    local ref = Instance.new('WedgePart') do
        ref.Color         = Color3.fromRGB(200, 200, 200)
        ref.Material      = Enum.Material.SmoothPlastic
        ref.Reflectance   = 0
        ref.Transparency  = 0
        ref.Name          = ""
        ref.Anchored      = true
        ref.CanCollide    = false
        ref.CFrame        = cf()
        ref.Size          = v3(0.25, 0.25, 0.25)
        ref.BottomSurface = Enum.SurfaceType.Smooth
        ref.TopSurface    = Enum.SurfaceType.Smooth
    end

    local function fromAxes(p, x, y, z)
        return cf(
            p.x, p.y, p.z,
            x.x, y.x, z.x,
            x.y, y.y, z.y,
            x.z, y.z, z.z
        )
    end

    function Triangle(a, b, c, parent, wb, wc, N)
        local ab, ac, bc = b - a, c - a, c - b
        local abl, acl, bcl = ab.magnitude, ac.magnitude, bc.magnitude
        if abl > bcl and abl > acl then
            c, a = a, c
        elseif acl > bcl and acl > abl then
            a, b = b, a
        end
        ab, ac, bc = b - a, c - a, c - b
        local out = cross(ac, ab).unit
        wb = wb or clone(ref)
        wc = wc or clone(ref)
        local biDir = cross(bc, out).unit
        local biLen = abs(dot(ab, biDir))
        local norm = bc.magnitude
        wb.Size = v3(0, abs(dot(ab, bc))/norm, biLen)
        wc.Size = v3(0, biLen, abs(dot(ac, bc))/norm)
        bc = -bc.unit
        wb.CFrame = fromAxes((a + b)/2, -out, bc, -biDir)
        wc.CFrame = fromAxes((a + c)/2, -out, biDir, bc)
        local G = Instance.new("Model", parent)
        G.Name = "Floor" .. N
        wb.Parent = G
        wc.Parent = G
        return wb, wc
    end
end

return Triangle