Biomes with perlin noise

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#1

Im trying to make world generator and want to make biomes like in minecraft with this code:

local X = 90
local Z = 90

local grid = {}

for x = -X, X do
	grid[x] = {}
	
	for z = -Z, Z do
		grid[x][z] = math.noise(x/10, z/10) * 15
	end
end

for x = -X, X do
	for z = -Z, Z do
		local yPos = grid[x][z]
		
		local Part = Instance.new("Part")
		Part.Anchored = true
		
		if yPos < -3 then
			Part.Material = Enum.Material.Sand
			Part.BrickColor = BrickColor.new("Cool yellow")
		else
			Part.Material = Enum.Material.Grass
			Part.BrickColor = BrickColor.new("Forest green")
		end
		
		Part.Position = Vector3.new(x*5, yPos, z*5)
		Part.Size = Vector3.new(5, 30, 5)
		Part.Parent = workspace
	end
end

i want to make this
image
to this
image
how can i do that?

#2

You could use something called temperature maps

#3

Simulate other aspects of your terrain like temperature and humidity. Then you can see what biome fits a position best.

What I did in a previous project was, I set an optimal point for each biome. For example, a desert would have a humidity of 0 and a temperature of 30. Then I would calculate what those parameters were for a given point.

Then I treated the terrain aspects as points. I used multi-dimensional euclidean distance (scalable approach for multiple terrain aspects) to determine the most fitting biome for a given point relative to the optimal biome points (see ‘Euclidean Distance’). You can even make an aspect more influential by multiplying it with some number.

image
image874×462 15.3 KB

My approach is easily scalable and easier to use than hard coding a biome diagram (which I believe is something that Minecraft works with). In fact, my approach is essentially the same as a biome diagram but not hard coded.

external-content.duckduckgo.com
external-content.duckduckgo.com660×587 38.6 KB

5 Likes
#4

How to get temperature from noise?

#5

Use a noise function with a position as the parameter T(p) = noise(p.X, p.Y, p.Z).

#6

Im trying to make biomes but temperature are random on every stud
here is code, can you check it?

local X = 20
local Z = 20

local seed= math.random(-10000,10000)

local grid = {}
local temperatureGrid = {}

for x = -X, X do
	grid[x] = {}
	temperatureGrid[x] = {}
	
	for z = -Z, Z do
		grid[x][z] = math.noise(x/10,seed, z/10) * 30
		temperatureGrid[x][z] = math.noise(x,grid[x][z],z) * 100
	end
end

for x = -X, X do
	for z = -Z, Z do
		local yPos = grid[x][z]
		local temperature = math.floor(temperatureGrid[x][z])
		
		local Part = Instance.new("Part")
		Part.Anchored = true
		Part.Position = Vector3.new(x*10, yPos, z*10)
		Part.Size = Vector3.new(10, 30, 10)
		Part.Parent = workspace
		local gui = Instance.new("SurfaceGui",Part)
		gui.Face = Enum.NormalId.Top
		local textt = Instance.new("TextLabel",gui)
		textt.Text = temperature
		textt.Size = UDim2.new(1,0,1,0)
		textt.BackgroundTransparency = 1
		textt.TextScaled = true
	end
end
#7

It might seem completely random, because it is way too dense. You should multiply each parameter by some scale (for instance 1 / 100).

#8

i think this is working because i made this

image
image729×479 157 KB

and its look like truth but i made
rocks after yPos 5 and temperature >30
water yPos <-4 and temperature < 10
and grass between them, and grass only at some places, i need to add more biomes or i made something wrong?

local X = 50
local Z = 50

local seed= math.random(-10000,10000)

local grid = {}
local temperatureGrid = {}

for x = -X, X do
	grid[x] = {}
	temperatureGrid[x] = {}
	
	for z = -Z, Z do
		grid[x][z] = math.noise(x/10,seed, z/10) * 30
		temperatureGrid[x][z] = math.noise(x*(1/100),grid[x][z]*(1/100),z*(1/100)) * 100
	end
end
for x = -X, X do
	for z = -Z, Z do
		local yPos = grid[x][z]
		local temperature = math.floor(temperatureGrid[x][z])
		
		local Part = Instance.new("Part")
		Part.Anchored = true
		if yPos >= 5 and temperature >= 30 then
			Part.Material = Enum.Material.Slate
			Part.BrickColor = BrickColor.new("Grey")
		elseif (yPos < 5 and yPos >=-4) and (temperature>=10 and temperature < 30) then
			Part.Material = Enum.Material.Grass
			Part.BrickColor = BrickColor.new("Forest green")
		elseif yPos <-4 and temperature < 10 then
			Part.Material = Enum.Material.Sand
			Part.BrickColor = BrickColor.new("Deep blue")
		end
		Part.Position = Vector3.new(x*10, yPos, z*10)
		Part.Size = Vector3.new(10, 30, 10)
		Part.Parent = workspace
		local gui = Instance.new("SurfaceGui",Part)
		gui.Face = Enum.NormalId.Top
		local textt = Instance.new("TextLabel",gui)
		textt.Text = temperature
		textt.Size = UDim2.new(1,0,1,0)
		textt.BackgroundTransparency = 1
		textt.TextScaled = true
	end
end

because the temperature is different?

#9

There seem to be some cases where parts do not get colored at all. In other words, the if-statement does not include all possible cases from your example. You only specified one type of grey, while there are 2 types of grey that emerge in your picture.