Best of 2020

The blog posts Hacker News loved most in 2020. 3,290 posts.

Any topic
2589

Fix Your Timestep

Introduction Hi, I’m Glenn Fiedler and welcome to Game Physics. In the previous article we discussed how to integrate the equations of motion using a numerical integrator. Integration sounds complicated, but it’s just a way to advance the your physics simulation forward by some small amount of time called “delta time”…

2590

R7RS versus R6RS (2018)

InPhase asked today on #scheme about the R7RS vs R6RS debate. I followed the original debate closely and have experience both using and implementing R6RS. I also recently added R7RS support in Akku.scm 0.3.0, so I feel like I can weigh in on this. It’s a topic that many feel passionately about, and I’m also firmly on…

2593

Our Immune System

(On this page in Dutch I post daily bits of realistic but hopeful Corona news. Here is a somehat rough translation of an article on our immune system I posted there, because I think it might also be useful for people that don’t speak Dutch). Wednesday, April 1st COVID-19 can only live thanks to us. Viruses cannot…

2595

A Light Box in Heavy Times

My son is nearing his second birthday, which makes him nearly two years old. When he was only four months old I decided that I would make him something with buttons. I didn’t have much more of an idea than that, but I ordered one hundred illuminated buttons and started mulling what to do with them. Nothing much…