How would I use noise properly for a 'y' value?

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#1

I’ve never really delved much into terrain generation so this is a tad bit confusing for me. What i want to do is make a value ‘y’ that i can set the position of my hexagonal segment to (Trying to replicate hexaria terrain).

I want to have only 2 for loops as oppose to 3, one for x axis and the other for z. This is what i have currently:

local PerlinNoise = require(script.PerlinNoise)

local TerrainFolder = game.Workspace.TerrainFolder
local Hexagons = TerrainFolder.Hexagons

local Hexagon = game.Workspace.Segment

local SizeX = 124
local SizeZ = 124
local SizeY = 256

local Amplitude = 256
local noisescale = 32

local Seed = math.random(1,1000000)

local HexSize = Vector2.new(Hexagon.Size.X, Hexagon.Size.Z)

for x = 0, SizeX do
	for z = 0, SizeZ do	
		for y = -10 / 2, SizeY do
			local nx = math.noise(y / noisescale, z / noisescale, Seed) * Amplitude
			local ny = math.noise(x / noisescale, z / noisescale, Seed) * Amplitude
			local nz = math.noise(x / noisescale, y / noisescale, Seed) * Amplitude
			
			local Density = nx + ny + nz + y
			
			if Density > 20 then
				local Offset = HexSize.Y / 2 * (x % 2)
				local Color
				
				Hexagon = Hexagon:Clone()
				Hexagon.Position = Vector3.new(x * (HexSize.X * 0.75), y * 0.75, z * HexSize.Y + Offset)
				
				if y >= 50 then
					Color = Color3.fromHSV(0.0925833, 0.153841, math.clamp(y / SizeY, 0.2, 0.6))
				end
				
				if y < 50 then
					Color = Color3.fromHSV(0.375306, 0.79411, math.clamp(y / 50, 0.25, 0.4))
				end
				
				if y < 3 then
					Color = Color3.fromHSV(0.158111, 0.187503, math.clamp(y / 3, 0.4, .8))
				end
				
				Hexagon.Color = Color
				Hexagon.Parent = Hexagons
				break
			end
		end
	end
	
	wait(.2)
end

I’m trying to get rid of the need for ‘y’
(The map will be only rendered once then used, so performance isn’t an issue)

This is what it gives me, as you can see it’s not really that good

image
image1920×1080 281 KB

I’d also like to know how I can create a radial gradient heightmap via code so that I can blend that with noise and create island terrain. Any pointers would help alot.

#2

Not totally sure what you’re asking, but here’s an example:

for x = 0, SizeX-1 do
	for z = 0, SizeZ-1 do
		local y = math.noise(x / noisescale, z / noisescale, Seed) * Amplitude

		-- example
		local part = Instance.new("Part")
		part.Anchored = true
		part.Size = Vector3.new(1 ,y, 1)
		part.CFrame = CFrame.new(x, y / 2, z)
		part.Parent = workspace
	end
end