Using Perlin Noise

Perlin Noise is not a built in feature to rubato, however we do recommend using the opensimplex library.

Install in your terminal

pip install opensimplex

Import to your python file

import opensimplex

As a developer we need to know how to use the opensimplex.noise2() function which generates 2D OpenSimplex noise from X,Y coordinates.

Simplex noise has values from -1 to 1 and moves smoothly between values.

For the resolution of the noise we use a scale value by which we divide. (The higher the value the more zoomed)

To get a different noise region (different randomness) we use an offset variable.

scale = 20
offset = rb.Vector(100, 100)

for x in range(rb.Display.res.x):
    for y in range(rb.Display.res.y):
        noise = opensimplex.noise2((x + offset.x) / scale, (y + offset.y) / scale)

That is how we get noise, in order to use it with rubato visually we need to draw points to the renderer.

The source code is available here.