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mathr.co.uk/blog/2020-11-08_zo
1.1 released

- New: F9 key toggles user interface transparency.
- New: .ppm output file saves an image sequence without FFmpeg.
- Fix: no more garbage audio output for an instant on device open.
- Fix: fix build with recent upstream imgui changes.
- Fix: when loading a session, don’t reset the last timeline waypoint zoom depth to the default for the input keyframe count.
- Fix: reduce timeline Z slider range to avoid glitches at extremes.
- Fix: add an example preset that was missing from the distribution.
- Doc: add demo/tutorial videos to documentation.
- Doc: round recommended keyframe image sizes to multiples of 16 so that exrsubsample can be used without worrying about edge effects.
- Win: include presets/ folder in Windows distribution.
- Win: include PDF manual in Windows distribution.
- Win: update imgui, miniaudio, tomlplusplus to latest versions. miniaudio needed a small patch to build as C++ void* casts must be explicit (unlike as in C); this will hopefully be fixed upstream soon.

2.15.1.2 released!

- OpenCL errors now display in-program without exiting (though, there shouldn't really be any compilation errors at all except for that one formula, maybe you can run out of VRAM or so)

- fixed the OpenCL error when enabling Negate X in the hybrid formula editor (thanks Microfractal for reporting the bug)

mathr.co.uk/kf/kf.html#kf-2.15

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claude boosted
claude boosted

Does anyone know of any good picture books on typography? My 2 year old nephew is really into identifying letters. He was having a great time with Knuth's Volume E of "Computers and Typesetting" last night.

3rd

```
: audio { c t -- o } t t 3 >> c 0 ~ * ^ + 0xF & t t 7 >> 3 & 1 + >> t 16 t 18 >> 7 & - >> 3 & 4 + & 3 * 7 & 1 + * t ~ 10 >> 0xF & * 4 >> t 0xFF & t ~ 7 t 18 >> 7 & + >> 0x1F & * 6 >> + 1 >> i8 ;
RUN audio
1 -> increment
0 -> time
```

composed with mathr.co.uk/barry/v2/
recorded with barry command line tool (fixed the bug that had broken it)
trimmed and DC offset removed with Audacity
encoded with LAME

(I made no noisevembeat 2nd)

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1st

```
: audio { c t -- o } t t 14 >> c 0 ~ * ^ + 0x3F & t t 15 >> 3 & 13 + >> 7 & 5 * 7 & 1 + * t ~ 8 >> 0x3F & * 6 >> t t ~ 8 >> 0x3F & * 6 >> ^ i8 ;
RUN audio
1 -> increment
0 -> time
```

composed with
mathr.co.uk/barry/v2/
recorded from Firefox with parec
trimmed with Audacity
encoded with LAME

31st, opening the windows after being inside all day

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claude boosted

IKLECTIK [off-site] presents,
Sonic Electronics Halloween Event (online) with Amy Cuttler / on&off / Isn'tses & raxil4 / mathr & netz / Heya
Saturday 31 October | 8pm
On IKLECTIK Youtube channel
Sonic Electronics is an experimental event. We propose an anti-technocapitalist approach to music genres like ambient, drone, techno, experimental, electronics, acousmatic, live coding, noise, vaporwave, glitch, dark, new wave, postpunk…
Programme:
Amy Cuttler
on&off
Isn'tses & raxil4
mathr & netz
Heya
Please support the artists: ** buytickets.at/iklectik/343401 **

youtube.com/channel/UCnu5Y1DjH

archive.org/details/making-fra
youtu.be/72IIn7C3UeI

Demo of some of the new features of KF-2.15 (hybrid formulas, exponential map transform, and OpenCL acceleration) and assembling zoom videos with zoomasm-1.0.

KF (Kalles Fraktaler) is fast deep zooming Free Software for escape time fractal graphics (Mandelbrot, Burning Ship, etc). Hybrid fractals combine features of multiple formulas, with a huge potential variety. The exponential map transform is optimal for rendering zoom animations (much more efficient than frames at 2x zoom levels even if the center portion is reused). OpenCL allows graphics cards to be used for calculations, which can be faster than the main processor.

zoomasm is a zoom video assembler. It takes the output of KF's exponential map zoom sequences (a series of EXR images containing raw iteration data), and reprojects them into a sequence of flat frames. It uses OpenGL shaders for customizable colouring algorithms, and has a timeline for variable speed zoom animation (key moments in the soundtrack can be synchronized to key moments in the zoom sequence).

mathr.co.uk/kf/kf.html
mathr.co.uk/zoomasm

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kf-2.15.1.1 released!
with bugfixes!
get it from mathr.co.uk/kf/kf.html#kf-2.15

- fix OpenCL support for NVIDIA GPUs
- fix crash in aligned memory (de)allocation
- documentation improvements

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kf-2.15.1 released!
with OpenCL acceleration, hybrid formula designer, exponential map, and more
get it from mathr.co.uk/kf/kf.html#kf-2.15

- support for perturbation iterations (requires double precision support on device: should work, some might not)
- editor (design your own fractal formula)
- coordinate transformation (useful for export to for efficient assembly)
- rotation and skew transformations are rewritten to be more flexible (but old skewed/rotated KFR locations will not load correctly)
- kf-tile.exe tool supports the new rotation and skew transformations
- the bitrotten skew animation feature is removed
- a few speed changes in built in formulas (one example, RedShiftRider 4 with derivatives is almost 2x faster due to using complex analytic derivatives instead of 2x2 Jacobian matrix derivatives)
- flip imaginary part of Buffalo power 2 (to match other powers; derivative was flipped already)
- slope implementation rewritten (appearance is different but it is now independent of zoom level and iteration count)
- smooth (log) iteration count is offset so dwell bands match up with the phase channel

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Welcome to post.lurk.org, an instance for discussions around cultural freedom, experimental, new media art, net and computational culture, and things like that.