Moving average on 1000 digits of π

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7184">https://ethblock.art/view/7184</a></li>
</ul>

one of the plot of 888s 'Pattern 03' mints

Pattern03 #7184

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7172">https://ethblock.art/view/7172</a></li>
</ul>

Pattern03 #7172

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7108">https://ethblock.art/view/7108</a></li>
</ul>

Pattern03 #7108

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7086">https://ethblock.art/view/7086</a></li>
</ul>

Pattern03 #7086

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7043">https://ethblock.art/view/7043</a></li>
</ul>

Pattern03 #7043

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7040">https://ethblock.art/view/7040</a></li>
</ul>

Pattern03 #7040

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7028">https://ethblock.art/view/7028</a></li>
</ul>

Pattern03 #7028

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/7025">https://ethblock.art/view/7025</a></li>
</ul>

Pattern03 #7025

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6950">https://ethblock.art/view/6950</a></li>
</ul>

Pattern03 #6950

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6935">https://ethblock.art/view/6935</a></li>
</ul>

Pattern03 #6935

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6879">https://ethblock.art/view/6879</a></li>
</ul>

Pattern03 #6879

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6839">https://ethblock.art/view/6839</a></li>
</ul>

Pattern03 #6839

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6824">https://ethblock.art/view/6824</a></li>
</ul>

Pattern03 #6824

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6808">https://ethblock.art/view/6808</a></li>
</ul>

Pattern03 #6808

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6807">https://ethblock.art/view/6807</a></li>
</ul>

Pattern03 #6807

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6804">https://ethblock.art/view/6804</a></li>
</ul>

Pattern03 #6804

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6800">https://ethblock.art/view/6800</a></li>
</ul>

Pattern03 #6800

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6782">https://ethblock.art/view/6782</a></li>
</ul>

Pattern03 #6782

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6748">https://ethblock.art/view/6748</a></li>
</ul>

Pattern03 #6748

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6739">https://ethblock.art/view/6739</a></li>
</ul>

Pattern03 #6739

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6663">https://ethblock.art/view/6663</a></li>
</ul>

Pattern03 #6663

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6636">https://ethblock.art/view/6636</a></li>
</ul>

Pattern03 #6636

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6573">https://ethblock.art/view/6573</a></li>
</ul>

Pattern03 #6573

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6524">https://ethblock.art/view/6524</a></li>
</ul>

Pattern03 #6524

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6515">https://ethblock.art/view/6515</a></li>
</ul>

Pattern03 #6515

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6436">https://ethblock.art/view/6436</a></li>
</ul>

Pattern03 #6436

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6433">https://ethblock.art/view/6433</a></li>
</ul>

Pattern03 #6433

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6427">https://ethblock.art/view/6427</a></li>
</ul>

Pattern03 #6427

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6396">https://ethblock.art/view/6396</a></li>
</ul>

Pattern03 #6396

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6357">https://ethblock.art/view/6357</a></li>
</ul>

Pattern03 #6357

<ul>
<li>More information about Pattern03: <a href="https://greweb.me/2021/08/pattern-03">https://greweb.me/2021/08/pattern-03</a></li>
<li>Digital mint: <a href="https://ethblock.art/view/6308">https://ethblock.art/view/6308</a></li>
</ul>

Pattern03 #6308

Joyful eye

Stippling technique on my beloved wife&#39;s eye. Using two different inks.

Stippling technique on my beloved wife's eye. Using two different inks.

Bi-color eye

Stippling technique made of 40&#39;000 strokes plotted in 6 hours with fountain pen and Diamine Indigo ink on watercolor paper.
Strokes follow a vector field simply driven by the formula <code>atan(x,y)</code>.

Stippling technique made of 40'000 strokes plotted in 6 hours with fountain pen and Diamine Indigo ink on watercolor paper.

My king

Forgotten mountain moons

Green mountains

Forgotten mountains

One of my earliest exploration of packing and contouring.

Forgotten contouring

<img width="100%" src="/images/plots/231b.jpg">

It has been a great journey since <a href="/plots/162">plot#162</a>. This is one of the early prototype.

Forgotten squares warping

Contouring Molotow Test

Waves

Stippling technique made of 30&#39;000 strokes plotted in 4.5 hours with fountain pen and Parker Quink ink on watercolor paper.
Strokes follow a vector field simply driven by the formula <code>atan(x,y)</code>.
Photo of a lemur I&#39;ve taken at <a href="https://www.parcs-zoologiques-lumigny.fr/">Parc des Félins (fr)</a>.

Stippling technique made of 30'000 strokes plotted in 4.5 hours with fountain pen and Parker Quink ink on watercolor paper.

Lémurien

Pink bodies

Turquoise bodies

Field

Eye field

One of my first exploration of this technique using different lines that diverges when there are more color to print.
Plot tribute to <a href="https://ethblock.art/create/19">https://ethblock.art/create/19</a> which completed.

Pattern 02 plot

There are a lot of noise all around. Bitcoin doesn&#39;t care. in code we trust.

Bitcoin in noisy terrain

Noisy terrain

Forgotten because it&#39;s one of the earliest prototype I had on the concept.

Twin mountains

This is a fresh experiment with raymarching distance function, fully rewritten in Rust, combined with some recent &quot;elevation&quot; algorithm.

Raymarched objects

Eye Variant

Dense Circles Nesting

Similar technique as all the elevation exploration with a &quot;min&quot; applied on the noise to make some steps appearing.

Step elevation

Ring packing

Simple elevation that have an interesting waving effect.

Waving elevation

Squares Noise Packing

This plot was made for fun as a contest I did for colleagues, where I asked how much meters of fountain pen ink was used in this. The answer was 93.38 meters.
That plot is gifted to a colleague who estimated at 100 meters.
<pre><code>Estimated print time: 1:39:35 (Hours, minutes, seconds)
Length of path to draw: 93.38 m.
Pen-up travel distance: 289.31 m.
Total movement distance: 382.69 m.
</code></pre>

Crimson & Indigo Squares

Square Spiral Packing

Diagonal Stroke Packing

Cross Stroke Packing

Pentagon Spiral Packing

Blue Spiral Packing

The best part of generative art is accumulating techniques and improving your creative coding skills. You explore your imagination and can combine different ideas and techniques over time once you have &quot;absorbed&quot; them in our playbook. IF you know N techniques, one more technique is now giving you <code>N*(N+1)</code> possibilities of outcomes. They can all be crossed over and combined together to produce results. It&#39;s exponential.
Here is the combination of shape packing, applied to triangle polygon, filled with one of my oldest &quot;fill&quot; algorithm that works by rotating around randomly sampled points.

combination of shape packing, applied to polygon, filled with one of my oldest fill algorithm that works by rotating around randomly sampled points

triangle noise spiral

A variant of <a href="/plots/203">plot#203</a>.
<blockquote>
I like randomness a lot. Exploring the beauty of noise is also recreating Nature&#39;s pattern and trying to put back some order in that randomness.
</blockquote>

I like randomness a lot. Exploring the beauty of noise is also recreating Nature's pattern and trying to put back some order in that randomness.

Bloody circles & ordered noise

As you may notice, I like randomness a lot. Exploring the beauty of noise is also recreating Nature&#39;s pattern and trying to put back some order in that randomness.
This creation is an unusual version of &quot;circle packing&quot; that instead of a pure random distribution will run a few times to actually try to find the biggest circle to place. This makes the distribution less random and way more ordered. However, the fact there is a &quot;a few times&quot; maximum tries gives some room for some randomness and not &quot;pure order&quot;.
The algorithm at stake is relatively simple, I will have to improve it in future to parallelize the computation.
<pre><code class="language-rust">fn packing(
 seed: f64,
 iterations: usize,
 desired_count: usize,
 optimize_size: usize, // &lt;--- number of retries to optimize the size 
 pad: f64,
 container: &amp;VCircle,
 min_scale: f64,
 max_scale: f64,
) -&gt; Vec&lt;VCircle&gt; {
 let mut circles = Vec::new();
 let mut tries = Vec::new();
 let mut rng = rng_from_seed(seed);
 let x1 = container.x - container.r;
 let y1 = container.y - container.r;
 let x2 = container.x + container.r;
 let y2 = container.y + container.r;
 let max_scale = max_scale.min(container.r);
 for _i in 0..iterations {
 let x: f64 = rng.gen_range(x1, x2);
 let y: f64 = rng.gen_range(y1, y2);
 if let Some(size) = search_circle_radius(&amp;container, &amp;circles, x, y, min_scale, max_scale) {
 let circle = VCircle::new(x, y, size - pad);
 // innovation happens here, basically we keep pushing until we reach the nb
 tries.push(circle);
 if tries.len() &gt; optimize_size {
 // then we grab the biggest
 tries.sort_by(|a, b| b.r.partial_cmp(&amp;a.r).unwrap());
 let c = tries[0];
 circles.push(c.clone());
 tries = Vec::new();
 }
 }
 if circles.len() &gt; desired_count {
 break;
 }
 }
 circles
}
</code></pre>

circles recursion & ordered noise

@greweb&#39;s #12 plot loop. Taking the idea of <a href="/plots/198">plot#198</a> to the next level using an animated eye.
These are plotted (~ 2 hours each frame) with fountain pens and two inks (&#39;Bloody Brexit&#39; by Diamine and &#39;Writers Blood&#39; by Diamine) on a A4 watercolor paper (300g/m2).
The eye is mirrored with a different offset to make this duality. The title refers to the French expression &quot;œil pour œil, dent pour dent&quot; which means &quot;an eye for an eye&quot;.
<h3 id="making-of">Making of</h3>
I took a video of my wife eye and use this GIF as an input to my generator =)
<img src="/images/plots/202-input.gif" width="400">

The way to mix the two eyes is using a simple technique, using my own tool set:
<pre><code class="language-rust">let get_color_1 = image_gif_get_color(&quot;images/eye.gif&quot;, opts.index).unwrap();
let get_color_2 = image_gif_get_color(&quot;images/eye.gif&quot;, opts.index + 2).unwrap();
let f = |(x, y): (f64, f64)| {
 let p = (x, y);
 let c1 = get_color_1((p.0, p.1 + 0.2));
 let c2 = get_color_2((p.0, 1.2 - p.1));
 smoothstep(0.0, 1.0, grayscale(c1)) *
 smoothstep(0.0, 1.0, grayscale(c2))
};
</code></pre>

œil pour œil (4 frames)

Plotting 1000 digits of π. Y axis spreads from 0 to 9, X axis is the index of digits. Diamine &#39;Red Dragon&#39; ink with fontain pen on watercolor paper.

Plotting 1000 digits of π. the y axis spreads from 0 to 9, the x axis is the index of digits.

1000 digits of π

Today is 200th day of 2021. I started plotting on January 1 on a daily cycle, so let&#39;s celebrate this 200th plot. I&#39;m using here a very similar technique as explored in <a href="/plots/198">plots#198</a> with even more tight lines and different settings used in combination with a coffee cup photo. 
This plot is a tribute to artist Sean M Puckett (<a href="https://twitter.com/PhotoPuck">@PhotoPluck</a> on Twitter), who I consider an incredible artist of the plotting scene. They are frequently releasing impressive photo-driven plots, pushing the boundaries of what can be done with fountain pens. Please check their work on <a href="https://twitter.com/PhotoPuck">https://twitter.com/PhotoPuck</a>.
I like their regular &quot;Monday coffee plot&quot; that I wanted to celebrate.

Monday coffee

This plot combines circle packing meets 2d sampling sorted by (x+y). Diamine &#39;Bloody Brexit&#39; on A4 watercolor paper.
It took 2 hours to draw with a fountain pen that ran 111 meters of ink!

This plot combines circle packing with sorted connected random lines technique. Diamine 'Bloody Brexit' on A4 watercolor paper.

oblique doodle packing

Using layered lines combined with an eye photo with two fountain pens on watercolor paper.

Using layered lines combined with an eye photo with two fountain pens on watercolor paper.

Eye 02

Eye 01

Brume means Mist in French. Diamine Earl Grey ink on watercolor paper.

Brume means Mist in French. Diamine Earl Grey ink on watercolor paper.

Brume

@greweb&#39;s #11 plot loop. This is an highlight of the recent work, animated.

Dancing mountain (4 frames)

Usage of different harmonies of noise to reveal glitches. Various noise experiments and inks.
<img width="100%" src="/images/plots/194zoom.jpg">

<img width="100%" src="/images/plots/194b.jpg">

<img width="100%" src="/images/plots/194c.jpg">

Usage of different harmonies of noise to reveal glitches. Various noise experiments and inks.

Elevation glitch

Layering lines with noise with another noise to produce random stripe distribution. Parker Quint on Watercolour paper (300g/m).

Layering lines with noise with another noise to produce random stripe distribution. Parker Quint on Watercolour paper (300g/m).

Striped mountain

Continuation of noise elevation. Fountain pens with various inks on watercolour paper (300g/m).
Two other experiments done and much more will follow because it&#39;s a great concept:
<img src="/images/plots/192b.jpg" width="100%" />
<img src="/images/plots/192c.jpg" width="100%" />

Continuation of noise elevation. Fountain pens with various inks on watercolour paper (300g/m).

Colored mountains 01

Lines elevation with perlin noise warping. Fountain pen and &#39;Bloody Brexit&#39; ink on watercolour paper (300g/m).
Various other experiments:
<img width="100%" src="/images/plots/191b.jpg">

<img width="100%" src="/images/plots/191c.jpg">

<img width="100%" src="/images/plots/191d.jpg">

Lines elevation with perlin-noise warping. Fountain pen and 'Bloody Brexit' ink on watercolour paper (300g/m).

Blurry elevation

Continuation on packing circles with layered lines.

Continuation on packing circles with layered lines.

Mountain moons

Packing circles with layered lines inside. exploration made before <a href="/plots/188">plot#188</a>&#39;s plot loop.
Also made a second one:
<img width="100%" src="/images/plots/189bis.jpg">

There is an infinity of variants.

Packing circles with layered lines inside. exploration made before plot#188.

Layers

Every NFT sold allows acquiring a plotted frame. (code in the unlockable content)
<nft-card contractAddress="0x495f947276749ce646f68ac8c248420045cb7b5e" tokenId="47428341271170390733253974222101382154768714392453356712130950051307370577931"> </nft-card> <script src="https://unpkg.com/embeddable-nfts/dist/nft-card.min.js"></script>
@greweb&#39;s #10 plot loop. That animation is the main digital art.
A high-quality video is available in 11 NFT editions, one per frame, for buyers to acquire each physical frame.
This work took me a lot of dedication to plot the 11 frames for an (interrupted) one week long! Each frame taking almost 2 hours to plot, you can&#39;t really cheat here, I like to think the process to be some sort of Proof Of Plot.
It is getting sold by achetezdelart on OpenSea. Detail is in the description.
<h2 id="plotting-highlights">Plotting highlights</h2>
<img width="100%" src="/images/plots/188plot1.gif">
<img width="100%" src="/images/plots/188plot2.gif">
<img width="100%" src="/images/plots/188plot3.gif">


<h2 id="making-of-and-technical-notes">Making-of and technical notes</h2>
It is probably one of the craziest main.rs source code I wrote for a plot, notably because I have combined in one script many different techniques, most of them explored earlier in other dedicated plots.
I tried to put in this plot loop my best artwork and recent iterations of color packing experiments.
The work is technically composed of 3 circles rotating in the middle of a lot of circles packing. Each circle contains itself a specific art technique:
<ul>
<li>shape contouring, to remind a bit exploration of <a href="/plots/136">plotloop#136</a></li>
<li>square packing, which is a direct reuse of logic of <a href="/plots/180">plot#180</a> with however a unique nesting of squares to create more depth.</li>
<li>layered lines in circles, which is an innovation that I&#39;m going to re-explore (starting with next <a href="/plots/189">plot#189</a>)</li>
</ul>
<h2 id="full-picture-photos">Full picture photos</h2>
1 out of 11
<img width="100%" src="/images/plots/188full0.jpg">

2 out of 11
<img width="100%" src="/images/plots/188full1.jpg">

3 out of 11
<img width="100%" src="/images/plots/188full2.jpg">

4 out of 11
<img width="100%" src="/images/plots/188full3.jpg">

5 out of 11
<img width="100%" src="/images/plots/188full4.jpg">
6 out of 11
<img width="100%" src="/images/plots/188full5.jpg">
7 out of 11
<img width="100%" src="/images/plots/188full6.jpg">

8 out of 11
<img width="100%" src="/images/plots/188full7.jpg">

9 out of 11
<img width="100%" src="/images/plots/188full8.jpg">

10 out of 11
<img width="100%" src="/images/plots/188full9.jpg">

11 out of 11
<img width="100%" src="/images/plots/188full10.jpg">

<h2 id="early-prototypes-i-had">Early prototypes I had!</h2>
It was a hard choice to give up on colors and stay on a minimalistic black.
I do not plan to sell these at this stage.
<img width="100%" src="/images/plots/188proto1.jpg">
<img width="100%" src="/images/plots/188proto2.jpg">
<img width="100%" src="/images/plots/188proto3.jpg">

@greweb's #10 plot loop. That animation is the main digital art. A high-quality video is available in 11 NFT editions, one per frame, for buyers to acquire each physical frame.

Rotation (11 frames)

3-level recursion of packing circles

circles inside circles inside circles in a circle

Continuation of packing circle experiments.

Continuation of packing circle experiments.

Packing disc

Packing turquoise half-filled circles, plotted with a fountain pen and Diamine Turquoise ink on watercolor paper.

Packing turquoise half-filled circles, plotted with a fountain pen and Diamine Turquoise ink on watercolor paper.

half-filled or half-empty?

A total of 11307 hexagons are drawn with a fountain pen to fill 3963 hexagons. The shapes are themselves positioned in hexagons. It takes 2 hours to perform on the speed I chose for a watercolor 300g/m paper. The ink changes color due to the amount of ink flow (it flows less and less). The ink is &#39;Bloody Brexit&#39; and there is only this one ink used!.
<img src="/images/plots/184zoom.jpg" width="100%">

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

Packing 3963 filled hexagons in hexagons. 2 hours of plotting with fountain pens on watercolor 300g/m paper.

packing hexagons in hexagons

Packing many squares in circles. Black fountain pein on watercolor 300g/m paper.

Packing many squares in circles. Black fountain pein on watercolor 300g/m paper.

packing squares in circles

Continuing my geometry minimalism series. This time, packing squares in triangles. Black fountain pen on 300g/m paper.

Continuing my geometry minimalism series. This time, packing squares in triangles. Black fountain pen on 300g/m paper.

packing squares in triangles

Continuation of <a href="/plots/180">plot#180</a>.
Third iteration on packing iso triangles in a square. two fountain pens on 300g/m paper.

Third iteration on packing iso triangles in a square. two fountain pens on 300g/m paper.

triangle packing

Continuation of <a href="/plots/179">plot#179</a>.
Second iteration on packing rotated squares in a square. Black fountain pens on a 300g/m paper. It&#39;s interesting how the paper makes the ink having different shade of greys.
This time, the rotations are less random and aligned on 10 possible angles. (but these are squares so not it repeats)
There is also two concentric squares drawn each time.
<h2 id="technical-notes">Technical notes</h2>
This is also a continuation of the code of <a href="/plots/179">plot#179</a>.
I did an improvement of the search algorithm using a dichotomic search:
search
<pre><code class="language-rust">fn poly_square_scaling_search(
 boundaries: (f64, f64, f64, f64),
 polys: &amp;Vec&lt;Polygon&lt;f64&gt;&gt;,
 x: f64,
 y: f64,
 angle: f64,
 min_scale: f64,
 max_scale: f64,
) -&gt; Option&lt;f64&gt; {
 let overlaps = |size| {
 let poly = rotated_square_as_polygon(x, y, size, angle);
 let bounds = poly.bounding_rect().unwrap();
 let topleft: Point&lt;f64&gt; = bounds.min().into();
 let bottomright: Point&lt;f64&gt; = topleft + point!(
 x: bounds.width(),
 y: bounds.height()
 );
 out_of_boundaries(topleft.x_y(), boundaries)
 || out_of_boundaries(bottomright.x_y(), boundaries)
 || poly_collides_in_polys(polys, &amp;poly)
 };

 let mut from = min_scale;
 let mut to = max_scale;
 loop {
 if overlaps(from) {
 return None;
 }
 if to - from &lt; 0.1 {
 return Some(from);
 }
 let middle = (to + from) / 2.0;
 if overlaps(middle) {
 to = middle;
 }
 else {
 from = middle;
 }
 }
}
</code></pre>

Second iteration on packing rotated squares in a square. Black fountain pens on 300g/m paper.

squares packing 002

Packing rotated squares in a square. Black fountain pens on Bristol. Interestingly one square didn&#39;t draw due to ink issues. It makes the final art pretty unique!
<h2 id="technical-notes">Technical notes</h2>
The algorithm brute-forces with 1 million iterations to find square location, for each iteration it will then search for the biggest square that can fit in the location space. I didn&#39;t even implemented dichotomic search for finding the square scale (it&#39;s a simple loop) but the overall script runs relatively fast in Rustlang (less than 10 seconds).
main loop
<pre><code class="language-rust">let mut polys = Vec::new();
let mut rng = rng_from_seed(opts.seed);
for i in 0..1000000 {
 let x: f64 = rng.gen_range(bounds.0, bounds.2);
 let y: f64 = rng.gen_range(bounds.1, bounds.3);
 let a: f64 = rng.gen_range(0.0, 8.0);
 if let Some(size) = poly_square_scaling_search(bounds, &amp;polys, x, y, a, min_threshold) {
 let poly = rotated_square_as_polygon(x, y, size - pad, a);
 polys.push(poly);
 }
 if polys.len() &gt; desired_count {
 break;
 }
}
</code></pre>
search
<pre><code class="language-rust">fn poly_square_scaling_search(
 boundaries: (f64, f64, f64, f64),
 polys: &amp;Vec&lt;Polygon&lt;f64&gt;&gt;,
 x: f64,
 y: f64,
 angle: f64,
 min_threshold: f64
) -&gt; Option&lt;f64&gt; {
 let mut size = 0.1;
 let dsize = 0.1;
 // TODO dichotomic search could help perf here...
 loop {
 let poly = rotated_square_as_polygon(x, y, size, angle);
 let bounds = poly.bounding_rect().unwrap();
 let topleft: Point&lt;f64&gt; = bounds.min().into();
 let bottomright: Point&lt;f64&gt; = topleft + point!(
 x: bounds.width(),
 y: bounds.height()
 );
 if out_of_boundaries(topleft.x_y(), boundaries) || out_of_boundaries(bottomright.x_y(), boundaries) {
 break;
 }
 if poly_collides_in_polys(polys, &amp;poly) {
 break;
 }
 size += dsize;
 }
 if size &lt; min_threshold {
 return None;
 }
 return Some(size);
}
</code></pre>

Packing rotated squares in a square. Black fountain pens on Bristol.

squares packing 001

@greweb&#39;s #9 plot loop. The 1920p animation is the main digital art. NFT is available in 6 editions, one per frame. First buyer of each edition can collect related frame to acquire the physical art (selected by buy order. PM @greweb, ship anywhere in the world). Secondary market is digital only. plotted on Bristol paper with black fountain pen. See greweb.me/plots/178
plotloop, physical, phygital, plot, loop, fountainpen
Here is &quot;Shell&quot; my 9th <a href="https://greweb.me/2021/05/plot-loops">&quot;plot loop&quot; (see article)</a>. The main digital art is a 1920p video loop of 6 frames available as a <a href="https://www.hicetnunc.xyz/objkt/154538">Tezos hicetnunc NFT</a>. The physical art is 6 frames of A4 size, plotted with a black fountain pen on Bristol paper, and offered when <a href="https://www.hicetnunc.xyz/objkt/154538">buying the NFT</a> (6 editions, assigned in buy order).
<img src="/images/plots/178zoom1.jpg" width="100%">

<h3 id="making-of">Making of</h3>
I&#39;ve rebooted one of my plot code (one from 100th&#39;s celebration) and animated it by rotating the center gravity. One of the usual challenge I had to face is the fact many strokes were placed at the same area and had risk to dig into the paper. I&#39;ve used my usual &#39;grid counter&#39; technique but this time pushed it to extreme in that it started making &quot;dots&quot; a bit like in the stippling technique. Dots are aligned to the grid that is used by the algorithm.
<img src="/images/plots/178plotting0.gif" width="100%">

I then met one of the biggest difficulty of my plot: the fact the paper will start waving a bit with the humidity of the ink. It creates two problem: imprecision and unplanned strokes (lines when the robot move it).
I countered this problem by reversing my plot and starting from the center:
<img src="/images/plots/178plotting1.gif" width="100%">

Some of the plots have small remaining imperfection that I judged being part of the art.

Shell (6 frames)

Spirals with 3 colors distributed with &#39;circle packing&#39; technique. 3 fountain pens on Bristol.

Spirals with 3 colors distributed with 'circle packing' technique. 3 fountain pens on Bristol.

3-colors spiral packing

My first plot experiment using &#39;circle packing&#39; technique. More ideas and explorations to come!

My first plot experiment using 'circle packing' technique. More ideas and explorations to come!

Blue Circle Packing

Exploration of marching squares contour and distance function technique.

Exploration of marching squares contour and distance function technique

3-Blob

Plots made during an internal Hackathon at Ledger using profile picture, hatching and contouring techniques.
<a href="https://opensea.io/collection/ledger-hackathon-summer-2021/">https://opensea.io/collection/ledger-hackathon-summer-2021/</a>

Plots made during an internal Hackathon at Ledger using profile picture, hatching and contouring techniques.