Johnathon Selstad

A Full Live-Scripted CAD Kernel in the Browser

A home for knowledge that is hard to find elsewhere

A collection of some of the neat math and physics tricks that I've collected over the last few years.

Browser BRep CAD in WebXR

A Symbolic Code Algebra+Calculus system for VS Code

Simulate and Render MuJoCo Models in the Browser!

A CSharp wrapper for libfive with Unity bindings

A framework for adding 3D Overlays to Webpages!

Javascript Tetrahedral FEM Simulation

Cheap arbitrary-surface projection mapping for 3D rendering.

A rich GUI and example code for visualizing and controlling the Dexter robot arm from Haddington Dynamics

An exploration in Deforming GCode

A small wip utility for creating image to ASCII conversions...

A Unity demo app that illustrates full opacity for hands with background elimination.

P2P Phone-as-Controller Input Library

Create Animated SVGs in your browser!

Physics Engine for Tetrahedral Finite Element Simulation

Shape objects and parts with physically based tools

Build Stochastic Lattice Structures in the browser!

A workbench for working with the Dexter Robot

A simple proof of concept for voice-to-voice interaction.

A simple web-based gif recording tool

A note-taking app backed by a Github Repo

A Webcam-based Heartrate Monitoring Demo

Proof of Concept for Shared Memory with the Browser

TypeScript port of Polyanya — compromise-free any-angle pathfinding on navigation meshes

7,683 Fusion 360 Gallery CAD models as executable build123d Python scripts

A combination of Face Tracking and Autostereoscopic Display for Augmenting Reflections

Hydroelastic Contacts with Marching Cubes

A Simple Shadertoy Boomarklet for Looking Glass Displays

Port of the OpenCascade library to JavaScript / WebAssembly using emScripten

Bake Tetrahedral Meshes in your browser

Visualize the Occlusogram of a pair of meshes in your browser!

Play Cards online with PartyKit

Open-source implementation of EMBER Integer Exact CSG (Nehring-Wirxel et al. SIGGRAPH Asia 2024)

Dear PyGui 3D Engine (prototyping)

Emscripten Demo of libsm64 via three.js and Webrio

A simple ASCII frontend for stockfish.wasm

A Static Site Generator for the Ghost Blogging Platform

three.js Testbed for Fast Optical Raytracing Simulations

JavaScript 3D library.

Voronoi Convex Decomposition

Work in progress prototype for the Chisel Level Editor, for Unity

Light Simulation for HTML Elements

A simple testbed for A* Heuristic Embeddings

PoC for new kind of AI-resistant Captcha

Semi-interactive PCB autorouter with physics-based placement, polyanya pathfinding, and greedy sequential routing

TypeScript port of Salewski's rubberband topological PCB router with interactive browser demo

Costumy is an open source prototype that turns 2D clothing patterns into 3D garments

Mario 64 as a library for use in external game engines

A one-off tool for turning .fbx's into .gltf's

No description.

A fast, general-purpose framework for geometry processing on the web.

A Discord Redbot Cog that adds threading functionality via the :thread: reaction.

A flexible, memory compact, fast and dynamic CSG implementation on top of three-mesh-bvh

COLMAP - Structure-from-Motion and Multi-View Stereo

Train, inspect, edit, automate, and export 3D Gaussian Splatting scenes from a single native application.

A collection of agent skills for CAD, robotics and hardware design

Browser simulator for full-colour FDM 3D printing from a finite filament palette.

No description.

CGAL Constrained_triangulation_3 compiled to WebAssembly with a three.js demo viewer.

A nanobind wrapper for NaturalPoint's Optitrack Camera SDK

Massively multiplayer 2D platformer using Cloudflare Containers + Realtime WebRTC SFU. One game server, infinite fan-out.

A Multiplayer Sandbox for building worlds!

A mobile-optimized Agent Orchestrator standing on the shoulders of giants

A State of the Art MIT-licensed PCB Autorouter

Display 360 Holograms with your phone and a special case

Open3D: A Modern Library for 3D Data Processing

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CefGlue in Unity Test (chromium embedded framework)

OptCuts, a new parameterization algorithm, jointly optimizes arbitrary embeddings for seam quality and distortion. OptCuts requires no parameter tuning; automatically generating mappings that minimize seam-lengths while satisfying user-requested distortion bounds.

An invigorating blend of 3D geometry tools in Python.

A per-pixel tribute simulation to Cortex Command

Real-time behaviour synthesis with MuJoCo, using Predictive Control

A Vertical Alignment Autoformatter for VSCode

A tiny microservice that makes adding authentication with GitHub to your application easy.

Interactive desktop buddy: PhysX RL humanoid living on your desktop in a transparent Wails overlay, with a sandboxed Buddy API for workshop content.

Box3D is a 3D physics engine for games

A lightweight suite of motion imitation methods for training controllers.

Some simple plugins for generating stator coils in kicad

Physics-based modeling system & research for identifying Exothermic Core-Mantle Decoupling – Dzhanibekov Oscillation (ECDO)

Open-source web frontend for AI-driven algorithmic trading — an OSS alternative to the OpenBB Workspace, powered by Nautilus Trader

Splitscreen co-op mode for Dusk (TwilitRealm). Drop-in/drop-out Player 2 with shared inventory and progression.

Gaming JetKVM - Remotely play with your friends on any device

A projection-based bijective map definition and a robust algorithm to construct the prismatic shell domain. https://cs.nyu.edu/~zhongshi/files/BijectivePrism.pdf

Self-hosted game stream host for Moonlight.

Online Terminal Emulator for Phone AI Coding

Lightweight ONNX Runtime inference for CIGPose - state-of-the-art whole-body pose estimation (67.5 AP).

Path tracing renderer and utilities for three.js built on top of three-mesh-bvh.

Vite plugin to use Slang shaders on the web.

NVIDIA PhysX SDK

The most agent-ergonomic browser tool in the world.

PlayCanvas fork with deterministic physics and AI-first documentation

Cortex Command - Open Source under GNU AGPL v3

Soldat: Remastered is a fork of the classic 2d shooter

A decompilation of Super Smash Bros Melee brought to you by a bunch of clever folks.

A python CAD programming library

No description.

Comprehensive research repository for GameCube/Wii game decompilation compiled for AI and human contributors

Play as Mario in Zelda: Ocarina of Time (Ship of Harkinian + libsm64, web/WASM)

An unofficial Web/Emscripten port of SM64 Co-op Deluxe - The best way to enjoy SM64 with Friends

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[CVPRW '23] Real-time depth estimation with an event camera and a laser projector

An open source SDK for logging, storing, querying, and visualizing multimodal and multi-rate data

Dataset of synthetic high density zero obstacle autorouting problems for PCB autorouting

Hypergraph types and traversal

Development at the speed of light

2D Sketch System in Typescript

jscad functions for creating components for electronics

Create 3d CAD models with React using jscad

Find convex regions given a set of vias

A web port of Marble Blast Gold and Marble Blast Platinum.

Making it easier to work with shaders

A virtual input library: supports mouse, keyboard, joypad, trackpad and more

This repository is an addition to my Voro-Emscripten repository and adds a small wrapper around the WebAssembly compiled file together with TypeScript support.

This project extends the existing Voro++ library (https://math.lbl.gov/voro++/) and exposes certain classes and functions via emscripten.

Porting games to the PC

Minimal solvers for calibrated camera pose estimation

Box2D is a 2D physics engine for games

Cloudflare’s documentation

A nearly-live implementation of OpenAI's Whisper.

Multi-Joint dynamics with Contact. A general purpose physics simulator.

GLOMAP - Global Structured-from-Motion Revisited

Geometry library for topological robustness

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Optimizing the placement of rotating quadrupoles for best confinement

This is the official website for the EmulatorJS project.

High dynamic range (HDR) image viewer for graphics people

Frame profiler

Mesh parameterization / UV unwrapping library

Javascript bindings for Nvidia PhysX based on emscripten/WebIDL

PSEye-py: a python interface to the PS3Eye camera

Cortex Command - Open Source under GNU AGPL v3 (no game data included)

Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WebGL2

A simple learning example for CUDA

Infrastructure for solid modeling

An example integration of Mapbox and Google Earth Engine