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**Mary Holstege** @mathling@mastodon.social · 4d

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

A little open venation

Grey tendrils reach out across the canvas. There is a rough circle of branches on the outside, and a denser set of branches reaching for the center. The grey is uncanny. Dead branches. Fungus. Rot.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Apr 13 *

Apr 13 *

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

More fun with integer sequences

Triangular Truchet tiling with integer sequences driving things

Flip sequence determines whether hypoteneuse runs down from left or up; swap sequence determines whether the pattern lays out from left or right.
Colour sequences determine colour advancement horizontally and vertically.

Loops

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Apr 10

Apr 10

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

More fun with OEIS integer sequences.

Today we'll make some pseudospirals: a sequence of arcs with 90 degree turns in between, where the radii are driven off a sequence. Arcs may have a gain function applied. Negative radii flip direction.

A200437: Number of -n..n arrays x(0..9) of 10 elements with zero sum and no two or three adjacent elements summing to zero
Sequence negation (every 17th), no gain

A circular chain of four square spirals with the boxes filled in with curves of pale yellows and blues.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Apr 8

Apr 8

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Loops

1. Download sequence data from OEIS.org
2. Pick a random one
3. Take seq mod k to determine a turning angle from -90 to 90
4. Walk the sequence

Here we have k=5
A111569: a(n) = a(n-1)+a(n-3)+a(n-4) for n>3, a(0)=-1, a(1)=1, a(2)= 2 a(3)=1
5 angles

An intricate 8-way radially symmetrical design of intersecting red lines with an 8-pointed star in the middle. There are slight variations in the shades of red.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Apr 7

Apr 7

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Bleed

Dark red streaks fall from the top, gathering at the bottom. Lines of maroon, white, and black, dotted. You get something of a the texture of old painted wood, perhaps.

#SVG #XQuery #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Apr 2

Apr 2

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Vertigo

Playing around with roll, pitch, and yaw

A plethora of grey rectangles of various sizes -- some dark, some light -- floating in space, casting shadows on a grey plane below them. The rectangles are tilted in space slanting downwards slightly towards the bottom left corner. We're falling through a field of rectangles and the ground is far below.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Mar 6

Mar 6

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Today we take the fractal arc waves and take them on a little trip along smooth meanders

The background is a gorgeous deep blue gradient (deepsea=CET-L15). I could stare at it for hours it is so lovely. Fractal waves formed of arcs within arcs within arcs tumble along the path of a smooth meandering curve that rises and falls and loops back on itself. The waves are shades of green (bathymetry).

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Mar 5

Mar 5

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Spiky

Taking the fractal arc-circle waves from the last set and rotating them around the center

A flower with six-fold symmetry. The petals are formed from arcs within arcs forming curves and spikes in various colours: black and purples. The center is white with wicked looking curved spikes protruding into it; the background is a pale green. There is something vaguely menacing about it somehow, like a detail in a horror film that tells you things are about to get very dark and dangerous.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Mar 4

Mar 4

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

The tempest

$Wild fractal waves fill the bottom half of the canvas: greenish yellow tipped in pink. Looming through the maelstron is an enormous octopus with glowing eyes. The background is a luscious dark blue.$

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Mar 1

Mar 1

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Experimenting with curved hachures

Here: some Delaunay triangles over some points with a little symmetry

A set of triangles filled with parallel red, black or yellow curves. The curves are a little wobbly with some bleeding, as if we dunked the whole thing in water and its starting to run, or something on an old manuscript. The arrangement isn't quite symmetric, but evokes symmetry nevertheless.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Feb 20

Feb 20

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Trail map in the karstlands

Some adjustments to the noise function, a small fix/tweak to the contouring, some experimentation with different colour palettes and numbers of contours, la voilà

$An artificial map. The palette runs from yellow-greens through aqua to pinks. There are several colour bands with reddish outlines. The topography is rough, with one large valley curving around a broken greenish region to the southwest surrounded by crinkly pink outcroppings to the north and east. Scattered about are various rather mysterious symbols in maroon consisting of circles and squares and lines. There are wiggling lines connecting some of them, in various colours and widths. A number of them converge on a circular symbol in the middle of the greenish region (a lake?). It all looks highly meaningful, but it isn't, of course. Colophon: Contouring over a noise field that combined ridged and billowy fractal noise. Symbols are random glyphs formed over a limited grid from a limited number of components and placed using a points from a Poisson disk sampling of the canvas. Lines connect random samplings of the symbols with some small jukes in between.$

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Feb 18

Feb 18

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Treasure of the Sierra Madre

An experiment in artificial map-making

$Topographic colouring in shades of orange, yellow, green, and grey. There are strange maroon symbols scattered about, formed of circles and arcs and rectangles. Some of the symbols are joined by snaking lines of various brown and tan hues and thicknesses. Colophon: The topographic background is made by contouring a ridged fractal noise field. The colours are plant-dye colours: red-hot poker, hawthorn leaf, bog myrtle, silverweed, gorse flower, reed flower, nettle leaf, colts' foot, acorn, and iris root. Symbols are scattered about using Poisson disk sampling. The lines joint a random sample of the symbols, with randomized jinks in between.$

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Feb 16

Feb 16

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Rather disturbing

This is not at all what I was aiming for, I can tell you that

Not. At. All.

The canvas is filled with many many squiggles of various sizes in shades of white over a black background. They twine together. They squirm. They writhe. It is a worm orgy. Or snakes. It is all really rather disturbing.

It was one of my periodic attempts to replicate a particular kind of doodling I do. This is not that. Not at all.

#XQuery #SVG #CreativeCoding

**Mary Holstege** @mathling@mastodon.social · Feb 13

Feb 13

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

Maze meets tilings

With a side-order of some optical illusion thrown in: I keep seeing shades of grey

A triangular tiling in black and white with a maze, also in black and white, superimposed on it. The maze is centered on the middle of the canvas and is white where the tiling is black and black where the tiling is white. The vision systems keeps wanting to see some of the triangles or even whole columns of them as grey, until you look at them directly.

#XQuery #SVG #CreativeCoding

Continued thread

**Norm Tovey-Walsh** @ndw@toot.wales · Feb 7

Feb 7

Norm Tovey-Walsh @ndw@toot.wales

Flash sale is up a little early: https://www.saxonica.com/shop/shop.xml #Saxonica #XSLT #XQuery

**Mary Holstege** @mathling@mastodon.social · Jan 31

Jan 31

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

#genuary2025 Day 30: abstract map

The exoplanet archive

Topo-coloured coastlines and waters: a gulf between two landforms. Scattered across everything are many many stars of various sizes and red/orange hues. There is a dense accumulation of them at the peak of the lower landform.

Colophon: Each star is a planet in the exoplanet archive (http://exoplanetarchive.ipac.caltech.edu). The star size is from the mass/radius of the planet (if given); the star colour is from the temperature of the parent star. Location is location in sky (mapped from ecliptic coordinates).

#XQuery #SVG #genuary

**Mary Holstege** @mathling@mastodon.social · Jan 29

Jan 29

Mary Holstege @mathling@mastodon.social

#GenerativeArt interlude

#genuary2025 Day 29: grid

An excuse to play with more optical illusions. Those black dots you see flitting through the grid? Those bright regions you see in the centers of the crosses? No you don't.