laura @netzzz@post.lurk.org

experimenting with dielectric breakdown models

https://www.fringeartsbath.co.uk/events

I will be #LiveCoding in the #C programming language from 6pm BST (1.5 hours from now), with Q&A afterwards (assuming mic works).

Managed to get a lightly modified #Etherpad working with my #Barry interpreter for #collaborative #LiveCoding of #PostFix #ByteBeat #audio.

It's implemented as a bit of hack modifying the core template pad.html at present, but it should be possible to port it to a standalone Etherpad plugin - I was just fighting with npm and node and require() and things I don't understand at all so took an easier way out.

Firefox's "strict" content blocking mode breaks it. Not sure why.

Added EXR import to my #MultifractalSpectrum calculator. Hacked an option into #Fractorium command line renderer to output raw histogram data to EXR. Ran a batch process to render and analyze some of the examples that come with Fractorium (in its Data/Bench directory).

golubaja_rippingfrominside_complexcode.flame

I'm listening to @netzzz on http://apo33.org:8000/filiason and it's very nice

Ported my #FractalFlame renderer to #OpenCL. Even on #GPU the #DensityEstimation is way too slow to be useful, it's quicker to get the same visual quality by plotting a zillion points.

The attached has around 8k samples per pixel, taking around 1min/frame (1 hour total). 256k subframes for motion blur, each being a single path of 16k iterations. Only plain simple #MoebiusTransformation stuff without xaos control..

Almost time for the start of the #EulerRoom #Equinox #TOPLAP #LiveCoding #Algorave #Streaming #Event

https://equinox.eulerroom.com/
https://www.youtube.com/eulerroom/live/
https://twitch.tv/eulerroom/

some of the visuals are a bit stroboscopic at the moment

Short unimpressive demo of #LiveCoding #PostFix #ByteBeat with #Barry in #geany editor using #Clive as sound engine. It does whole program compilation when I hit Ctrl-S to save the file.

(16bit 48kHz audio so not really one for bytebeat purists perhaps)

“Artist-researchers Roel Roscam Abbing (@rra) and Aymeric Mansoux (@320x200) likewise critique universal openness in their analysis of an emerging internet infrastructure created by and for users: the #Fediverse.”

starting at 11:30am today #Transmediale

https://2020.transmediale.de/content/exchange-4-deplatformization-and-the-ethics-of-exclusion

Go on!

Attempt at escape-time Apollonian gasket via circle inversions.

I implemented Slow Mating for quadratic polynomials using the equations and hints in Chapter 5 of Wolf Jung's 2017 paper "The Thurston Algorithm for quadratic matings" https://arxiv.org/abs/1706.04177

My code is 145 lines of quite-straightforward C, vs 2249 lines of C++ with various state hidden in mutating objects for the code accompanying the paper (which admittedly does a lot more, working from angles to compute the complex points and (pre)periods that are the input to my code). I'll do a blog post next week once I've tested more cases to make sure I haven't done any big mistakes.

There were a couple of subtleties, 1. needing to use cproj() to normalize infinity's representation and avoid NaNs; and 2. in one place, converting (a - b) / (a - c) to (1 - b/a) / (1 - c/a) so that it still works when a is infinite.

Attached images are the north period 4 island mated with the west period 4 island (blue background), and 2/5 bulb mated with 1/2 bulb (turquoise background).

#Quadratic #JuliaSets #SlowMating #RationalFunction #maths #fractals