Lately I’ve been learning OpenGL and to get better at coding shaders I went through the Ray Tracing in One Weekend book and ported it to GLSL (OpenGL Shading Language). The book is great by the way and I would recommend this challenge to anyone who is interested in learning about ray tracing or shader programming. The book implements the ray tracer in C++ on the CPU and I’ve ported it to GLSL to run on the GPU. While making the port I ran into some interesting challenges due to the differences in CPU and GPU architectures so I thought I’d write a post about them and how I solved them.

Lately I’ve been building a web-based table component at work and in this post I want to talk about implementing drag and drop column reordering. The HTML5 Drag and Drop API has many quirks that make this harder than expected.

Inspired by a recent Hacker News comment, I’m publishing the notes I took when I set up my email server two years ago. This covers all the steps to get from a fresh Debian install to a working email setup. My setup features a spam filter and SPF, DKIM and DMARC for reliable delivery but is otherwise pretty minimal. I’ve been using this with Thunderbird and K-9 Mail for the past two years and it’s been great.

Neither GIGABYTE’s official RGB Fusion software nor the excellent OpenRGB support changing the RGB colors of recent GIGABYTE boards in a way that persists reboots. However there is a way to do this that involves some slightly scary editing of EFI variables and the danger of bricking your board if you’re not careful.