Scalar Ray-Tracer in 7 Lines of k

[tosh]

http://nsl.com/k/ray/ray.k

[RodgerTheGreat]

For the curious without access to a k2/k3 interpreter, here's what this renderer produces (converted to PNG for convenience):

https://i.imgur.com/OOdW5Dm.png

If you change that last line to q:R[3]128 you'll get

https://i.imgur.com/3bDmUhE.png

The high-res version takes me around 6 seconds to render.

[kick → RodgerTheGreat]

See also: Arthur's version. http://nsl.com/k/ray/raya.k

[kick]

HN prevents Arthur's from being resubmit to the site for some reason, but here's a 40 comment discussion on it from 2009:

https://news.ycombinator.com/item?id=944559