Show HN: Sfera – sliding puzzle in curved space (open-sourced)github.com2 points·by bntr·2 mesi fa·0 comments
Show HN: Visual Lambda Calculus – a thesis project (2008) revived for the webgithub.com49 points·by bntr·4 mesi fa·9 comments
Show HN: Reverse perspective camera for OpenGL (Three.js)github.com52 points·by bntr·8 mesi fa·8 comments
bntr·4 mesi fa·discussDuplo is also compatible with regular Lego. We used Duplo for the big structure and Lego on top for details. Great way to build huge stuff quickly.https://upload.wikimedia.org/wikipedia/commons/0/04/LEGO-kom...
bntr·4 mesi fa·discussThanks! I liked the pics here: https://piedeleu.com/posts/diagrammatic-lambda-calculus/I'd love to see them smoothly animated.
bntr·4 mesi fa·discussI like this catalog: https://github.com/prathyvsh/lambda-calculus-visualizationsAnd it seems that John Tromp's diagrams originate from David C. Keenan's Mockingbird (1996),and Bubble Notation comes from Wayne Citrin's Visual Expressions (1995)
bntr·4 mesi fa·discussYou can also construct your own puzzles and share them via URL.Example: https://bntre.github.io/visual-lambda/#workspace=H4sIAAAAAAA...
bntr·4 mesi fa·discussFor comparison: factorial(3) visualized in two different notations.John Tromp's Lambda Diagrams (via 2swap): https://www.youtube.com/watch?v=RcVA8Nj6HEo&t=1346sBubble Notation: https://www.youtube.com/watch?v=aRgu8S3Pnb8
bntr·7 mesi fa·discussA tiny experimental "continuous-motion" Life glider I once made - an artistic take: https://bntr.planet.ee/lj/glider.gif
bntr·8 mesi fa·discussExactly. Reversing the z-test is one way to get a reverse-perspective effect, but it doesn't allow for a smooth transition between projections (like dolly zoom).
bntr·8 mesi fa·discussFor an extra dose of nausea, there's also a cross-eye stereo version: https://bntr.planet.ee/temp/rp/(Alt + mouse wheel changes the eye distance)
bntr·8 mesi fa·discussNo performance hit - it's just a custom projection matrix. The rest of the rendering pipeline works exactly the same as with a normal camera.
bntr·8 mesi fa·discussGreat visualization! It would be good to add some fog for a better perception of 3D.
bntr·8 mesi fa·discussOnce I made a transition between two ditherings: https://github.com/bntre/dithering-gradient-py
bntr·10 mesi fa·discussAnother notation showing the construction of the predecessor function: https://www.youtube.com/watch?v=CWzn2ucPMdg
bntr·10 mesi fa·discussThe most complete catalog I've found: https://github.com/prathyvsh/lambda-calculus-visualizations
