One-dimensional Perlin noise

This is implementation of one-dimensional Perlin noise algorithm and also its interactive demo.

Stack

• Python3
• Pygame (For demo)

Supported interpolation types

• Linear interpolation
• Cosine interpolation
• Cubic interpolation

Setup

Clone the repository and change the working directory:

git clone https://github.com/alexandr-gnrk/perlin-1d.git
cd perlin-1d

Create and activate the virtual environment:

python3 -m venv ./venv
source ./venv/bin/activate

Install requirements:

pip3 install -r requirements.txt

Run the demo:

python3 main.py

PerlinNoise class usage

Simple case:

>>> from perlin_noise import PerlinNoise, Interp
>>> 
>>> seed = 10
>>> noise = PerlinNoise(seed)
>>> noise.get(0)
-0.7909696871365708
>>> noise.get(1)
-0.12853800531350212
>>> noise.get(0.24)
-0.7011998031545463
>>> noise.get(0.3)
-0.6544376328384862
>>> noise.get(5)
0.8343996279794508

With specified interpolation:

>>> noise = PerlinNoise(seed, interp=Interp.LINEAR)
>>> noise.get(0)
-0.7909696871365708
>>> noise.get(1)
-0.12853800531350212
>>> noise.get(0.5)
-0.45975384622503646

With specified amplitude, frequency, number of octaves and interpolation type:

>>> noise = PerlinNoise(seed, 2, 10, 3, interp=Interp.CUBIC)
>>> noise.get(0.1)
0.12735558147138537
>>> noise.get(0.2)
0.7056095270509709
>>> noise.get(0.3)
-0.4716026010196055

Demo control

Keys	Action
A/Z	Increase/decrease amplitude
F/V	Increase/decrease frequency
O/L	Increase/decrease number of octaves
UP/DOWN	Increase/decrease number of segments on screen (implicit frequency)
LEFT/RIGHT	Change speed of moving noise
M	Turn on/off marks
I	Change interpolation method
S	Reseed noise
Space	Set speed of moving to 0

Demo screenshots

Simple 1D Perlin Noise:

Noise with a high amplitude:

Noise with a high frequence:

Noise with 4 octaves:

Noise with marks on it:

Noise with linear interpolation:

Noise with cubic interpolation:

Useful links

1. Perlin Noise
2. 1D Perlin noise
3. Interpolation methods