Matt Ferraro

I love the last section of "Hiding Images in Plain Sight: The Physics Of Magic Windows"[0] >I know what you're thinking. What about the hologram?! >Does the math above imply that a hologram will always be created, or is this one cat hologram just an incredible coincidence? >Well you see, I've discovered a truly marvelous proof of this, which this website's margin is unfortunately too narrow to contain :) [0]: https://mattferraro.dev/posts/caustics-engineering

This guy has exactly two posts on his blog. The other one is on a completely different topic but great read as well: https://mattferraro.dev/posts/cnc-router

Some other open source 3D CAD tools: Code-based - CadQuery - https://github.com/CadQuery/cadquery/ - build123d - https://github.com/gumyr/build123d - OpenSCAD - https://openscad.cloud/openscad/ GUI (browser-based) - Cadmium (abandoned, cool idea) - https://mattferraro.dev/posts/cadmium

You might be interested in https://mattferraro.dev/posts/cadmium People are building cool stuff, and happen to do it in Rust.

For people interested in this topic, here's a good set of slides going over Grassman/Clifford/Geometric algebra concepts: http://www.terathon.com/gdc12_lengyel.pdf And another good site: https://mattferraro.dev/posts/geometric-algebra

More useful is one of his references on how to build a CNC router.[1] This one covers all the usual mistakes one can make building a CNC router. (He skips the real n00b mistake - trying to use a Dremel tool in a CNC router. That never works. Dremel tools slow down or stall under load, and the CNC controller doesn't detect that, so it keeps pushing a stalled tool around.) [1] https://mattferraro.dev/posts/cnc-router

> Joules-Thomson effect is what allows for refrigeration I don't think this is true. The "simple" model of refrigeration taught in highschool is just a carnot cycle running backwards, and this can be modeled with an ideal gas. The author of the post covers this the section on "the Thermodynamics 101 Answer"[1], where all you need to drop the temperature of a gas is to let it do work on the piston. That's not to say that JT is not useful, just that we can explain a theoretical refrigerator without it. [1] https://mattferraro.dev/posts/joule-thomson#the-thermodynamics-101-ans…

Someone else's work that alters light transmission (instead of reflection): https://mattferraro.dev/posts/caustics-engineering

That's impressive. Here someone created a slab of glass that turns the caustics into a picture of his cat: https://mattferraro.dev/posts/caustics-engineering (discovered via: https://news.ycombinator.com/item?id=29063617 )

Since we're sharing links, here's my collection of interactive pages too: Interactive visual explanations of math and algorithms, with motivating examples from computer games. https://www.redblobgames.com/ The world's first linear algebra book with fully interactive figures. http://immersivemath.com/ila/index.html The Textbook of the Future. Interactive. Personalised. Free. https://mathigon.org/ Structure and Interpretation of Computer Programs. Interactive Version https://xuanji.appspot.com/isicp/ An Interactive Introduction to Fourier Transforms http://www.jezzamon.com/fourier/index.html Clear, intuitive lessons about imaginary numbers, exponents, and more. https://betterexplained.com/ An Interactive Introduction To Quantum Computing http://davidbkemp.github.io/QuantumComputingArticle/ The website of Martin O'Leary artist, designer, teacher, researcher. http://mewo2.com/ A Visual and Interactive Guide to the Basics of Neural Networks https://jalammar.github.io/visual-interactive-guide-basics-neural-netw… Interactive demos on network theory, game theory, trust etc. https://ncase.me/ An interactive explanation of curves and surfaces https://ciechanow.ski/curves-and-surfaces/ Introduction to geometric algebra — an invertible vector product and the implication of having one. https://mattferraro.dev/posts/geometric-algebra Interactive visualizations for different topics from physics and mathematics. Includes trigonometry, polynomial regression, and Bézier…