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Collaboratively editing strings of text is a common desire in peer-to-peer applications. For example, a note-taking app might represent each document as a single collaboratively-edited string of text. The algorithm presented here is one way to do this. It comes from a family of algorithms called CRDTs, which I will not describe here. It's similar to the approaches taken by popular collaborative te
This page is a collection of obscure C++ features, gathered over the years as I've explored different corners of the language. C++ is very big and I'm always learning more about it. Hopefully you'll learn something from this page even if you already know C++ pretty well. The features below are roughly ordered from least to most obscure. What square brackets really mean Accessing an element of an a
Export as: PNG | SVG | LaTeX The big white box above is the FSM designer. Here's how to use it: Add a state: double-click on the canvas Add an arrow: shift-drag on the canvas Move something: drag it around Delete something: click it and press the delete key (not the backspace key) Make accept state: double-click on an existing state Type numeric subscript: put an underscore before the number (lik
Made by Evan Wallace This demo requires a decent graphics card and up-to-date drivers. If you can't run the demo, you can still see it on YouTube. Interactions: Draw on the water to make ripples Drag the background to rotate the camera Press SPACEBAR to pause and unpause Drag the sphere to move it around Press the L key to set the light direction Press the G key to toggle gravity Features: Raytrac
Figma (2012-2021) I'm one of the cofounders of Figma, a collaborative browser-based interface design tool. My main contributions were to the rendering engine, the multiplayer collboration service, the vector and text editors, and the plugin system. Read more... esbuild (2020-present) My biggest open source project is esbuild, a very fast JavaScript and CSS bundler. It's main purpose is to bring ab
Path tracing is a realistic lighting algorithm that simulates light bouncing around a scene. This path tracer uses WebGL for realtime performance and supports diffuse, mirrored, and glossy surfaces. The path tracer is continually rendering, so the scene will start off grainy and become smoother over time. Here's how to interact with it: Add an object using the "Add Sphere" or "Add Cube" buttons
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