by Lex Fridman
donut_deobfuscated.c
This is the code:
k;double sin()
,cos();main(){float A=
0,B=0,i,j,z[1760];char b[
1760];printf("\x1b[2J");for(;;
){memset(b,32,1760);memset(z,0,7040)
;for(j=0;6.28>j;j+=0.07)for(i=0;6.28
>i;i+=0.02){float c=sin(i),d=cos(j),e=
sin(A),f=sin(j),g=cos(A),h=d+2,D=1/(c*
h*e+f*g+5),l=cos (i),m=cos(B),n=s\
in(B),t=c*h*g-f* e;int x=40+30*D*
(l*h*m-t*n),y= 12+15*D*(l*h*n
+t*m),o=x+80*y, N=8*((f*e-c*d*g
)*m-c*d*e-f*g-l *d*n);if(22>y&&
y>0&&x>0&&80>x&&D>z[o]){z[o]=D;;;b[o]=
".,-~:;=!*#$@"[N>0?N:0];}}/*#****!!-*/
printf("\x1b[H");for(k=0;1761>k;k++)
putchar(k%80?b[k]:10);A+=0.04;B+=
0.02;}}/*****####*******!!=;:~
~::==!!!**********!!!==::-
.,~~;;;========;;;:~-.
..,--------,*/
…and the output, (could be) animated in JavaScript
GitHub - petercunha/Donut: :robot: A JavaScript implementation of the infamous "donut.c" program @GitHub, JavaScript
Donut/donut.js at master · petercunha/Donut · GitHub
@@@@@@@@
####$$$$$$$$@@@$$
*******#####$$$$$$$$$$
=====!!!!***#####$$$$$$$#
:;;;;;;==!!!****########$###
::~~::;;;=!!=!!*****#########
--,,-~~~:;;;===!******#*#####**
,.....,-~~:;:====!!*!***********
.........--~::;;===!!!*!********!
..........,--~:;;;;==!!!!!*****!!
...........,-~~::;;===!=!!!!!!!!=
......,,-..,,-~::;;;====!=!!!!!=
.,-~~~;;##..,,-~~::;;;==========;
.-~;=*#$$@...,-~~:::;;;;;======;
-;!!*#$$#...,--~~:::;;;;;;;;;:
-;=!**!=~...,---~:::::;;;;;:
,:=:;;:-...,,,--~~~:::::::~
-:;:~-.....,,--~~~~~~~~~
,--,.....,,,---------
.........,,,,,,,,,
.............
