obfuscated raymarcher

torus.c

                         i,j,k,L;
                    #include <time.h>
                 float X,Y,Z,l,t,x,y,z,
               A,S,C;r(X,Y)float*X,*Y;{A
              =*X,S=sin(l),C=cos(l);*X=A*C
            -*Y*S,*Y=A*S+*Y      *C;}main()
           {char*p,s[L=(            W+1)*H];
          printf("\x1b"             "[2J");r
         :p=s;for(i=0;               i<H;++i,
        *p++=10)for(j                 =0;j<W;
        ++j,*p++="@$"                 "#=:,-"
       ". "[k=t])for                  (X=(2.*
       j-W)/W,Y=(2.*                  i-H)/H
       ,Z=3,l=sqrt(X                  *X+Y*Y
       +Z),X/=l,Y/=l                 ,Z/=l*l
       ,t=k=0;k<50&&~               (l<.05||
        (t+=l)>8&&(t=               8));++k
         )x=X*t,y=Y*t              ,z=Z*t-
          5,l=clock()             *(l=1./
          CLOCKS_PER_SEC        ),r(&y,&z
           ),l/=2,r(&x,&       y),x=sqrt
            (x*x+z*z)-2.2,l  =sqrt(x*x+
              y*y)-.4;puts("\x1b[H"
                 );write(1,s,L);
                    goto r;}
                /* by camel-cdr */
        /* cc torus.c  -DH=32 -DW=64 -lm */

torus.md

Output