visual code: Donut-shaped C code that generates a 3D spinning donut

Donut-shaped C code that generates a 3D spinning donut - YouTube
by Lex Fridman

donut_deobfuscated.c

Donut math: how donut.c works – a1k0n.net

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

a1k0n.net/js/donut.js

GitHub - petercunha/Donut: :robot: A JavaScript implementation of the infamous "donut.c" program @GitHub, JavaScript

Donut/donut.js at master · petercunha/Donut · GitHub

                                   @@@@@@@@                                    
                               ####$$$$$$$$@@@$$                               
                             *******#####$$$$$$$$$$                            
                            =====!!!!***#####$$$$$$$#                          
                           :;;;;;;==!!!****########$###                        
                           ::~~::;;;=!!=!!*****#########                       
                           --,,-~~~:;;;===!******#*#####**                     
                           ,.....,-~~:;:====!!*!***********                    
                           .........--~::;;===!!!*!********!                   
                           ..........,--~:;;;;==!!!!!*****!!                   
                            ...........,-~~::;;===!=!!!!!!!!=                  
                             ......,,-..,,-~::;;;====!=!!!!!=                  
                             .,-~~~;;##..,,-~~::;;;==========;                 
                              .-~;=*#$$@...,-~~:::;;;;;======;                 
                                -;!!*#$$#...,--~~:::;;;;;;;;;:                 
                                 -;=!**!=~...,---~:::::;;;;;:                  
                                  ,:=:;;:-...,,,--~~~:::::::~                  
                                    -:;:~-.....,,--~~~~~~~~~                   
                                      ,--,.....,,,---------                    
                                        .........,,,,,,,,,                     
                                           .............