Using Math to generate Cylinders?

[xDeltaXen]

@Blokav

local function make_triangle(a, b, c, thickness)
	-- sanitize input
	a = (typeof(a) == "Vector3") and a or Vector3.new(0, 0, 0)
	b = (typeof(b) == "Vector3") and b or Vector3.new(1, 0, 0)
	c = (typeof(c) == "Vector3") and c or Vector3.new(0, 1, 0)
	thickness = math.max((tonumber(thickness) or 1), 0.05)

	-- re-order vertices so that AB is the longest side
	local a0, b0, c0 = a, b, c
	local ab = (a - b).Magnitude
	local bc = (b - c).Magnitude
	local ca = (a - c).Magnitude
	if (bc > ab) then
		-- ab not the longest side
		if (ca > bc) then
			-- ca longest
			a = c0
			b = a0
			c = b0
		else
			-- bc longest
			a = b0
			b = c0
			c = a0
		end
	else
		-- ab longer than bc
		if (ca > ab) then
			-- ca longest
			a = c0
			b = a0
			c = b0
		else
			-- ab longest
		end
	end
	ab = (a - b).Magnitude
	bc = (b - c).Magnitude
	ca = (a - c).Magnitude

	local area = (b - a):Cross(c - a).Magnitude / 2
	local h = 2 * area / ab
	local hx = math.sqrt((ca ^ 2) - (h ^ 2))

	-- cframe stuff
	local f = (b - a).Unit
	local u = (c - a).Unit
	local r = f:Cross(u).Unit
	local u2 = r:Cross(f).Unit
	local cf = CFrame.fromMatrix(a, r, u2)

	-- parts
	local p1 = Instance.new("WedgePart")
	p1.Anchored = true
	p1.Size = Vector3.new(thickness, h, hx)
	p1.CFrame = cf * CFrame.new(0, h / 2, -(hx / 2)) * CFrame.Angles(0, math.pi, 0)
	p1.Parent = workspace
	local p2 = Instance.new("WedgePart")
	p2.Anchored = true
	p2.Size = Vector3.new(thickness, h, ab - hx)
	p2.CFrame = cf * CFrame.new(0, h / 2, -(ab + hx) / 2)
	p2.Parent = workspace

	return p1, p2 -- so the user can do more stuff with it
end

So do you know how to make a 3D five-sided triangle made out of parts then?

[blokav]

Yes, though it’s just a solid triangle made from two wedge parts.

[xDeltaXen]

I mean lots of parts like the cuboid sphere and cylinder?