#CindyJS
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realscientists.de
Die Toolbox Lehrerbildung umfasst Grundlagentexte, Diagramme, Videotutorials (z. B. zur Cognitive Load Theory), gescriptete Unterrichtsvideos und interaktive Visualisierungen mit #CindyJS.
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March 11, 2024 at 12:30 PM
msmathcomp.bsky.social
On the second day of #illustratingMath at @cirm-math.bsky.social, we continue the mini-courses #CindyJS and #Shadertoy: We tackled the scripting abilities of CindyJS and immersed ourselves in the creation of fractals and circle inversions, learning to write functions and structs in #GLSL. (1/3)
A photo of a person standing in a lecture hall in front of a projection screen. The screen displays "CindyScript Basics" with bullet points about syntax, such as "Lines end with semicolons" and "Typeless." In the foreground, there are several boxes of colorful chalk on a wooden table. A person looks down at a laptop in a lecture hall while a software interface titled "Cinderella" is projected on the screen behind them. The screen shows a geometric pattern of green dots arranged in a circular, spiral formation on a grid. A high-contrast digital image of a Mandelbrot set fractal. The central "body" is black, surrounded by a vibrant, glowing pink and white halo that reveals intricate, repeating branching patterns. A digital screenshot of a shader program displaying a complex yellow geometric pattern on a dark background. The pattern consists of intersecting circles and arcs that create a symmetrical, tunnel-like effect toward the center.
January 6, 2026 at 10:43 PM
mattz.bsky.social
In Thursday's class, students used a variety of techniques to make repeating tiles, including subdividing squares/triangles/hexagons, Escher-style edge matching, and Jürgen Richter-Gebert's iOrnament software (try it at imaginary.github.io/cindyjs-apps...).
A step-by step illustration showing how to make two varieties of repeating tiles by subdividing a square and rearranging the pieces. The same process applied to triangular tiles to get a tile that covers the plane with 632 symmetry. Classical Escher-style edge matching to produce a squggly shape that tiles the plane. Tracing the previous shape to demonstrate that it indeed covers the plane.
September 9, 2026 at 7:12 PM
biblicirm.bsky.social
🆕🎬Illustration as a Mathematical Research Technique
Goodman-Strauss, C. ;Katzenberger, M.M. ;Reinhardt, T. (2026). CindyJS: browser-based interactive visualizations. CIRM. Audiovisual resource
dx.doi.org/10.24350/CIR...
library.cirm-math.fr/Record.htm?i...
@cirm-math.bsky.social #math #geometry
January 21, 2026 at 9:52 AM
msmathcomp.bsky.social
For the fourth #illustratingMath day at the @cirm-math.bsky.social graduate school, we continue the mini-courses. In the #CindyJS course, we consider domain coloring to visualize complex functions. In the #Shadertoy course, we solve some PDEs and then render the game of life. (1/3)
Tim Reinhardt, a person in a gray sweater, leans over their laptop at a desk in a lecture hall. The projection screen behind them shows a code editor with JavaScript and a colorful, star-shaped phase portrait visualization. Tim Reinhardt stands in a lecture hall, holding a microphone and looking up at a projected slide. The slide shows a detailed code editor and a vibrant, complex mathematical visualization with rainbow-colored patterns. Steve Trettel, a person in a blue t-shirt and baseball cap, stands in front of a projection screen with their hands raised. The screen shows a digital interface with a glowing, blue-and-orange organic-shaped visualization. Boxes of chalk are lined up on the desk in the foreground. Steve Trettel stands near a blackboard and a large screen displaying GLSL shader code. In the foreground, a laptop shows the same code and a resulting yellow and blue hourglass-shaped visualization.
January 9, 2026 at 12:00 AM
msmathcomp.bsky.social
Tim Reinhardt, Michael Martin Katzenberger, and Chaim Goodman-Strauss are kicking us off with the first lesson in their five-lesson mini-course on "CindyJS" (cindyjs.org). We start with some #geometry construction in CindyJS' predecessor, Cinderella. (2/n)
A person, identified as Tim Reinhardt from the Technical University of Munich, stands at the front of a university lecture hall. They are wearing a black turtleneck and facing slightly downward toward a long wooden desk equipped with a laptop, monitor, and various workshop materials. Behind them, a large projector screen displays the title "Workshop on CindyJS" in a simple serif font. Below the title, the names Chaim Goodman-Strauss, Michael Katzenberger, and Tim Reinhardt are listed. The lecture hall features high ceilings, white walls, and large blackboards flanking the projector screen. Rows of empty wooden desks and chairs are visible in the foreground, creating a quiet, academic atmosphere. An open laptop sits on a wooden desk in a lecture hall, displaying a screen divided into two windows: a daily schedule and a geometric modeling interface showing a complex triangle construction. In the background, two people—including Tim Reinhardt from the Technical University of Munich—are hunched over a different laptop at the main presenter's desk. The lecture hall features long wooden tables, blackboards, and a large projection screen in the distance that mirrors a geometric software interface. The foreground laptop is a dark Dell model, and various cables and electronic equipment are scattered across the desks, suggesting an active technical workshop or academic session.
January 5, 2026 at 11:32 PM
msmathcomp.bsky.social
On day 3 of the #illustratingMath graduate school at @cirm-math.bsky.social, we continue the two mini-courses on #CindyJS and #Shadertoy. In the former, we learn how to draw conics (and how to draw them well). In the latter, it's all about hyperbolic tilings. (1/3)
Steve Trettel stands in front of a chalkboard and a projector screen. The screen displays a Shadertoy interface featuring a blue and white hyperbolic tiling and the title "73 Tiles." Steve Trettel, a person with a beard and glasses wearing a red sweater, stands with one arm raised in front of a projector screen showing GLSL shader code in Shadertoy and a repeating pattern of white "F" shapes on a dark background. A digital illustration of two black curved lines on a white background. Several small yellow circles (points) are positioned along the curves, suggesting a mathematical or geometric plot.
January 7, 2026 at 10:53 PM
msmathcomp.bsky.social
Final day of the #illustratingMath graduate school at @cirm-math.bsky.social wrapping up the mini-courses #CindyJS/#Shadertoy with circle inversions & ray tracing. A huge thanks to the teachers: Tim Reinhardt, Michael Martin Katzenberger, Chaim Goodman-Strauss, and @stevejtrettel.bsky.social. (1/4)
A classroom view from behind a laptop. In the background, Michael Martin Katzenberger and Chaim Goodman-Strauss are leaned over a desk looking at a screen, positioned in front of a chalkboard and a large projection of "CindyScript" code. In the foreground, a laptop screen displays a real-time video feed of a person’s face viewed through a circular, distorted mathematical lens. A lecture hall setting where Chaim Goodman-Strauss and Michael Martin Katzenberger stand before a large projector screen. Chaim Goodman-Strauss is in the foreground, wearing a dark green jacket and glasses, gesturing with their hands as they speak. Michael Martin Katzenberger stands slightly behind them to the left, wearing a black hoodie with "TUM" printed on it. The screen displays a "Coxeter group kaleidoscope" web interface with complex JavaScript code and a colorful, circular fractal pattern. Steve Trettel presents in front of a large screen displaying a 3D rendered geometric shape known as a "Barth sextic." They are wearing an orange T-shirt and a grey cap, gesturing with both hands to explain the visualization. The projection is part of a course titled "GPU-Accelerated Mathematical Illustration." Steve Trettel stands at a large chalkboard in a lecture room, drawing complex diagrams labeled "Real World" and "Virtual World" to illustrate mathematical lighting and shading concepts. They are wearing an orange T-shirt, jeans, and a grey baseball cap. The desk in front of them is covered with several boxes of colorful chalk and a green cleaning bucket.
January 10, 2026 at 12:06 AM
amaebooknew.bsky.social
味わう仕様書 CindyJS: GLSLの足音が聞こえる複素数学系ライブラリ が、Kindleストアで販売開始されました。
5leaf.jp/kindle/B0H7M3N8QJ/#a...
味わう仕様書　CindyJS: GLSLの足音が聞こえる複素数学系ライブラリ
著者：AAA (著)　個人出版　2026/7/4(土)配信
5leaf.jp
July 5, 2026 at 3:03 PM
bernhardwerner.mathstodon.xyz.ap.brid.gy
For a while now, I've been trying to get pictures into my videos where the “drawing process” is shown. In the past, I used SVGs where I had to extract the path data and animate them. But I had quite a few performance issues in CindyJS that way.
I always wanted […]

[Original post on mathstodon.xyz]
June 7, 2025 at 4:34 PM
realscientists.de
Die Software dafür (hoffentlich) zu verbessern, würd’ also gut zu meinem Aufgabenbereich passen. Da ich CindyJS aber auch für meinen YouTube-Kanal nutze, gibt es natürlich auch ein persönliches Interesse daran.
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March 12, 2024 at 4:17 PM
realscientists.de
Jetzt, wo ich eine unbefristete Stelle habe, möchte ich Zeit darin investieren, an CindyJS selbst mitzuarbeiten. Im Moment nutze ich es eher weniger für Arbeiten an der HM. Aber spätestens im Wiederholungs- und Vorkurs will ich damit Materialien erstellen.
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March 12, 2024 at 4:17 PM
realscientists.de
Baustelle 4: Ich arbeite seit vielen Jahren mit der dynamischen Geometriesoftware #CindyJS (siehe cindyjs.org). In ALICE:Bruchrechnen, der Toolbox Lehrerbildung und zahlreichen anderen Projekten und auch Vorträgen hab’ ich damit interaktive Visualisierungen erstellt.
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March 12, 2024 at 4:16 PM
msmathcomp.bsky.social
2048: 2048.imaginary.org
Parking: imaginary.github.io/cindyjs-apps...
Ultimate Tic Tac Toe: www.uttt.ai
Solitaire: imaginary.github.io/cindyjs-apps...
Hilbert's Holiday's: hilberts-holidays.eu/index.html?l...
Match the Net: matchthenet.de
Space Rescue: imaginary.github.io/space-rescue/ (2/3)
Surfer 2048
2048.imaginary.org
August 23, 2024 at 11:35 AM