Peter Shirley's one is nice too! But he has 2 more: https://gamephysicsweekend.github.io/ https://gamephysicsweekend.github.io/ And you can do a very simple

Peter Shirley's one is nice too! But he has 2 more: https://gamephysicsweekend.github.io/ https://gamephysicsweekend.github.io/ And you can do a very simple one in much less than 30 lines in C. ;) Edit: Oops, it was the wrong one... This is the right one: https://raytracing.github.io/ https://raytracing.github.io/ Sorry!