A web app for creating and simulating 2D geometric optical scenes.

See here for the list of contributors.

Adding SyncTeX support to a PDF viewer on Android, compatible with vim on Termux, a Linux terminal on Android. Useful when working with a phone and a Bluetooth keyboard.

Designing the unit cell of the Sierpinski octahedron such that the horizontal cross-sections are simple closed curves that change continuously with height. This makes the fractal (half of it, actually) perfectly 3D printable with spiral mode (single-wall without infill).