My sketched hatchings
Here’s my hatching SVG
The first row is diagonal lines with a little randomization
The second row is a space filling curve called a hilbert curve. This curve has 8^8 points. To produce gradations the points are rendered with a certain probability this functionally limits the amount of points and makes the curve less dense. There are multiple good sources to learn more about the hilbert curve from.
https://www.fundza.com/algorithmic/space_filling/hilbert/basics/index.html
^ this link provides a good recursive solution for the curve. The first two arguments to the function they code describe the top left point from where the curve begins. The next four detail how the curve expands to the bottom and to the right.
The last row is multiple sin and cos waves added together to produce a more complex curve and then stacked at a certain spacing. The spacing edits the gradation.
Vpype! at the end I used this CLI to run some optimizations
here’s a good command to run after producing svgs.
vpype read FILE_NAME.svg linemerge linesort linesimplify write --center OUT_FILE_NAME.svg