The Nim Ray Tracer Project --- Part 3: Lighting & Vector Maths

[Listening Esoterica from Dan Pound. Very reminiscent of the Steve Roach type of tribal/electronic ambient, which is always a good thing in my book. Parts 1, 2, 6 & 7 are my personal highlights.]
Ok, so last time I ended my post with the cliffhanger that I’m going to show some actual Nim code in the next episode, which is this. Well, I’ll never make foolish promises like that again, I swear!