Forking and glitching the old plot <a href="/plots/084">/plots/084</a>.
Curated by votes during a live stream on <a href="https://twitch.tv/greweb">https://twitch.tv/greweb</a>

Glitched Parametric

Here is &quot;Spring&quot;, my 6th <a href="/plots/tags/plotloop">plot loop</a> <a href="https://greweb.me/2021/05/plot-loops">(see article)</a>. The main digital art is a 1920p video loop of 8 frames available as a <a href="https://www.hicetnunc.xyz/objkt/117072">Tezos hicetnunc NFT</a>. The physical art are the 8 frames, plotted with 2 fountain pens on Bristol A4 paper (250g), and offered when <a href="https://www.hicetnunc.xyz/objkt/117072">buying the NFT</a>.
There are 8 plots available for sale and there will be no other editions of these plot loop frames. They all have the same inital price and the physical piece is selected in order of buy as each frame is relatively similar!
<h3 id="closer-look">Closer look</h3>
The ink &quot;Bloody Brexit&quot; from Diamine have particularity to have coppery color reflections.
<img src="/images/plots/157zoom1.jpg" width="100%">
<img src="/images/plots/157zoom2.jpg" width="100%">
<img src="/images/plots/157zoom3.jpg" width="100%">

<h2 id="making-off">Making off</h2>
Here is a video of the plot, accelerated 5x.
<iframe width="100%" height="400" src="https://www.youtube.com/embed/UBzsr0CcrSk" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

Before that result, I had many iterations and 3 prototypes where I adjusted many parameters each time:
<img src="/images/plots/157proto1.jpg" width="100%">
<img src="/images/plots/157proto2.jpg" width="100%">
<img src="/images/plots/157proto3.jpg" width="100%">

I also had this failure: (forgot to attach the paper!)
<img src="/images/plots/157fail.jpg" width="100%">

8 frames plotted making an animated loop. A 1920p video and A4 physical art is available as an NFT.

Spring (8 frames)

A chaotic experiment of parametric function meeting perlin noise. Brush pen with &#39;Bloody Brexit&#39; ink on Bristol paper.

A chaotic experiment of parametric function meeting perlin noise. Brush pen with 'Bloody Brexit' ink on Bristol paper.

Chaotic Inner

Orange

A similar flower as in <a href="/plots/123">plot#123</a> but with 2 steps themself split into 2 steps and different spiral amplitude. Sakura pens on Black card.

A similar flower as in plot#123 but with 2 steps themself split into 2 steps and different spiral amplitude. Sakura pens on Black card.

2-step flowers

transition of two parametric spirals. I called it &#39;parametric oddity&#39; because one of the parametric frequency is literally an &#39;odd number&#39; which makes it having this mesh effect. Fountain pen with &#39;Red Dragon&#39; on white bristol A4.
basically it&#39;s a transition between <code>(10πt,41πt)</code> and <code>(8πt,8πt)</code> with radius that varies all along to make it a spiral. 41 is the oddity here!
The parametric is repeated twice with a slightly different perlin noise displacement to add some moiré effect on top of this.
<img src="/images/plots/138zoom1.jpg" width="100%">

<img src="/images/plots/138zoom2.jpg" width="100%">

transition of two parametric spirals. I called it 'parametric oddity' because one of the parametric frequency is literally an 'odd number' which makes it having this mesh effect. Fountain pen with 'Red Dragon' on white bristol A4.

parametric oddity

transition of two parametric spirals repeated twice with different displacement. Fountain pen with &#39;Aurora Borealis&#39; on white bristol A4. The beginning of the spiral is not yet changing in radius to make a bolder border, this is a subtle but important aspect.
<img src="/images/plots/137zoom1.jpg" width="100%">

The zoom is quite interesting here. let&#39;s also zoom at the center too:
<img src="/images/plots/137zoom2.jpg" width="100%">

transition of two parametric spirals repeated twice with different displacement. Fountain pen with 'Aurora Borealis' on white bristol A4.

Alien planet

A stable parametric spiral transition. Fountain Pen and Turquoise ink on Bristol A4.

A stable parametric spiral transition. Fountain Pen and Turquoise ink on Bristol A4.

Turquoise trispiral

Yet another spiral transitioning between two parametric functions. &#39;Bloody Brexit&#39; ink from Diamine with brush pens on A4 Bristol.
<img width="100%" src="/images/plots/131.gif" />

Yet another spiral transitioning between two parametric functions. 'Bloody Brexit' ink from Diamine with brush pens on A4 Bristol.

hexa flower noise

Exploring a spiral transitioning between two parametric functions to create an hexagonal fold effect. Addition of perlin noise to offset a bit two similar spirals. Fountain pen on A4 Bristol.
<img width="100%" src="/images/plots/130_zoom.jpg"/>

Exploring a spiral transitioning between two parametric functions to create an hexagonal fold effect. Addition of perlin noise to offset a bit two similar spirals. Fountain pen on A4 Bristol.

hexafold planet

Parametric flower plotted with two brush pens. It is challenging to get the correct pen height when working with brush pens. I used two parametric functions with a slight displacement to reveal some moiré patterns created by the divergence.

Parametric flower plotted with two brush pens.

Pentaflower

another parametric plotted with a brush pen and &#39;Bloody Brexit&#39; ink by Diamine.

another parametric plotted with a brush pen and 'Bloody Brexit' ink by Diamine.

Parametric brush

yet another parametric spiral perturbated by perlin noise!

yet another parametric spiral perturbated by perlin noise!

Parametric shield

parametric function and perlin noise. Brush pen with Bloody Brexit ink on A4 bristol.

parametric function and perlin noise. Brush pen with Bloody Brexit ink on A4 bristol.

Parametric spiral on fire

Sakura Gelly Roll on dark red A4 card.

Flower parametric stack

stacking multiple parametric functions with 3 stops. playing with moiré effects. STA pigment liner on A4 bristol.
<pre><code class="language-rust">let size = 90.;
let f1 = (8., 8.);
let f2 = (5., 40.);
let amp1 = 1.0;
let amp2 = 0.05;
let samples = 100000;
let spins = 200.0;
let splits = 4.0;

let parametric = |p: f64| {
 let p1 = (splits * p).floor();
 let p2 = splits * p - p1;
 let t = (p1 + 0.8 * p2) / splits;
 let scale = 1.0 - t;
 let mut p = (
 scale
 * amp1
 * ((spins * 2. * PI * t).cos()
 + amp2
 * mix(
 (spins * f1.0 * PI * t).cos(),
 (spins * f2.0 * PI * t).cos(),
 t,
 )),
 scale
 * amp1
 * ((spins * 2. * PI * t).sin()
 + amp2
 * mix(
 (spins * f1.1 * PI * t).sin(),
 (spins * f2.1 * PI * t).sin(),
 t,
 )),
 );
 let noise_angle = 2.
 * PI
 * perlin.get([
 0.02 * p.0,
 0.02 * p.1,
 100.0 + opts.seed,
 ]);
 let noise_amp = 0.1
 * perlin.get([
 0.01 * p.0,
 0.01 * p.1,
 opts.seed,
 ]);
 p.0 += noise_amp * noise_angle.cos();
 p.1 += noise_amp * noise_angle.sin();
 p
};
</code></pre>

stacking multiple parametric functions with 3 stops. playing with moiré effects. STA pigment liner on A4 bristol.

Growing parametric splitted

<a href="/2021/05/plot-loops">✍️ See also: Plot loops article</a>.
This first plot loop is called &quot;Triplanet&quot;. It&#39;s a transition of two parametric functions with many perlin noise displacements. This is a continuation of <a href="/plots/100">&quot;Planet Holes&quot;</a> series as well as recent <a href="/plots/111">&quot;Parametric stack&quot;</a> explorations.
Every frame is generated with a Rust script I wrote.
16 frames has been plotted with fountain pen on bristol paper (ink: Red Dragon by Diamine). With a back and forth effect, this produces a 30 frames animation loop.
<img width="100%" src="/images/plots/121_walled.jpg"/>

The animation is released as a NFT video on <a href="https://www.hicetnunc.xyz/">hicetnunc</a>. There are 16 editions, as many as there were frames plotted. The NFT video is an art in itself.
By buying a frame (by order of buy), the first buyer also chose what happens to the physical plot: either I keep it OR you can claim it (contact me on Twitter) and have me sending it anywhere in the world!
<img width="100%" src="/images/plots/121_zoom.jpg"/>

Plotting with fountain pen is challenging as it requires many search on the ink, paper and many fail and retry. Plotting all these frames took an afternoon.
<img width="100%" src="/images/plots/121_plot.jpg"/>

Triplanet is my first plot loop, physical animation of 16 plotted frames. transition between parametric functions and perlin noise.

Triplanet (16 frames)

This is, like <a href="/plots/114">plot#114</a>, yet another parametric &quot;stack&quot; (using parametric at different scales).
This time, the parametric is very noisy. There is a desired effect to make a blur illusion. It&#39;s very fuzzy. I have some glitches on the signature but it&#39;s part of the art now!

Yet another parametric stack, noisy one this time! white uniball on black A4.

Blurry waves

Continuation of <a href="/plots/113">plot#113</a> with different parametric functions.
<ul>
<li>Sakura Gelly Roll white on black. (clairefontaine 210g)</li>
<li>STA pigment liner 0.05mm on white. (canson bristol A4)</li>
</ul>
The black plot have an interesting precision which makes it smooth from a far look but the details of this plot are interesting as well. I&#39;m not yet sure what creates the vertical line glitch we see on both plots, is it the paper? is it my robot? It is part of the art now.

concentric parametric flowers

Exploration of perlin noise triangle planets. various fountain pen on A4 bristol.
These are taking almost one hour to plot, with 2 passes of 2 different spirals. Each spiral varies a bit with different offset and displacement noise which creates a desired effect of bolder areas, caveats and craters.
The displacement noise is a simple perlin noise, only one harmony is used but the noise is split into two 2 different perlin noises: the angle noise (like a vector field, different angle of displacement) and the amplitude noise (how much does the displacement move the point).
The triangle is made with a parametric function, reusing technique explored on <a href="/plots/114">plot#114</a>.
There is an important effort on finding a good balance between noise and distribution of lines (it&#39;s not linear, it&#39;s closer on edges).

Exploration of perlin noise triangle planets. various fountain pen on A4 bristol.

Triangle planet

Another parametric functions. Inspired from <a href="/plots/111">plot#111</a> idea: stacking multiple parametric functions. The parametric used is
<pre><code class="language-rust">let parametric = |t, p| {
 (
 (0.2 + 0.7 * p) * (2. * PI * t).sin()
 + 0.1 * (14. * PI * t).sin(),
 (0.2 + 0.8 * p) * (2. * PI * t).cos()
 + 0.2 * (20. * PI * t).cos(),
 )
};
</code></pre>
Sakura Gelly Roll on black A4, revealing artifacts of the paper.

stacking multiple parametric functions. Sakura Gelly Roll on black A4, revealing artifacts of the paper.

Growing parametric 14-20

Another parametric functions. Inspired from <a href="/plots/111">plot#111</a> idea: stacking multiple parametric functions. The formula is <code>(0.3+0.7p)f(2πt)+0.05f(8πt)</code> where p is the growing factor, t is the parametric value and f is a cos for x and sin for y. Sakura Gelly Roll on black A4, revealing artifacts of the paper.

Growing 8πt

Parametric functions are classical entities that i&#39;ve explored many times (from first day!)...
<ul>
<li>...in classical forms: <a href="/plots/001">plot#001</a>, <a href="/plots/003">plot#003</a>, <a href="/plots/007">plot#007</a>, <a href="/plots/013">plot#013</a>, <a href="/plots/038">plot#038</a>, <a href="/plots/096">plot#096</a>, <a href="/plots/096">plot#096</a>,...</li>
<li>... in more funky forms: <a href="/plots/071">plot#071</a>, <a href="/plots/073">plot#073</a>, <a href="/plots/080">plot#080</a>, <a href="/plots/082">plot#082</a>, <a href="/plots/084">plot#084</a>, <a href="/plots/087">plot#087</a>, <a href="/plots/095">plot#095</a>, <a href="/plots/090">plot#090</a>, <a href="/plots/097">plot#097</a>,...</li>
</ul>
This is however the first time I think about stacking parametic functions: It might not be very perceptible but it is basically 150 parametric functions projected on different scales. The idea comes a bit from the &quot;Planet holes&quot; idea (<a href="/plots/100">plot#100</a>), circles with different radius.
I might not have taken the best parametric for this plot but it&#39;s still fun. Indeed, the pen digged a bit too much in the paper and I might try again with other parametric functions in future.
The ink used is &quot;Bloody Brexit&quot; by Diamine, like on <a href="/plots/109">plot#109</a>, which produces interesting reflection in combination with a good paper (A4 Canson 250g/mm Bristol) and lamp.
<img src="/images/plots/bloodybrexit.jpg" width="100%" />

stacking multiple parametric functions, fountain pen with 'Bloody Brexit' ink which produces an interesting reflection. A4 bristol.

Growing parametric

interleaving curves following a parametric function. 2 fountain pens on Bristol.

interleaving curves following a parametric function. 2 fountain pens on Bristol.