05 Sep 2025 In 2017 I discovered the free of charge Orbiter 2016 space flight simulator which was proprietary at the time and it inspired me to develop a space flight simulator myself. I prototyped some rigid body physics in C and later in GNU Guile and also prototyped loading and rendering of Wavefront OBJ files. I used GNU Guile (a Scheme implementation) because it has a good native interface and of course it has hygienic macros. Eventually I got interested in Clojure because unlike GNU Guile ...