Re: [TUHS] Space Travel, was New: The Earliest UNIX Code

Doug McIlroy wrote in &lt;201910181152.x9IBq95P001809(a)coolidge.cs.Dartmouth\ .EDU>: |> 10-36-55.pdf user-mode programs: pool game | |This game, written by ken, used the Graphic 2. One of its |earliest tests--random starting positions and velocities on |a frictionless table with no collision detection--produced |a mesmerizing result. This was saved in a program called |"weird1", which was carried across to the PDP11. | |Weird1 was a spectacular accidental demonstration of structure |in pseudo-random numbers. After several minutes the dots |representing pool balls would evanescently form short local |alignments. Thereafter from time to time ever-larger alignments |would materialize. Finally in a grand climax all the balls |converged to a single point. | |It was stunning to watch perfect order emerge from apparent |chaos. One of my fondest hopes is to see weird1 revived. Not about random orders chaos, no, quite the opposite, but the IOCCC context 2012 was won by endoh1, a fluid simulator using "Smoothed-particle hydrodynamics (SPH)", and the "marching squares" algorithm to render particles. If the defaults for gravity (1 -> 0), pressure (4 -> 1) and viscosity (8 -> 2) are changed entertaining effects can be seen. It is like swirling, not self-organizing order out of chaos, but i wanted to post it nonetheless because of some properties of the code, for example the IOCCC Makefile introduces "make love", may also echo "You are not expected to understand this", and what else can be expected. The xxx.txt is an input file i made for this post, the competition ones are neat (a fountain, for example), but for normal gravity etc. $ make endoh1_color $ ./endoh1_color < xxx.txt And spend some time. |Doug --End of &lt;201910181152.x9IBq95P001809(a)coolidge.cs.Dartmouth.EDU&gt; --steffen | |Der Kragenbaer, The moon bear, |der holt sich munter he cheerfully and one by one |einen nach dem anderen runter wa.ks himself off |(By Robert Gernhardt)