semi deobfuscated donut

gistfile1.txt

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=sin(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;
	}
}

/*****####*******!!=;:~~::==!!!**********!!!==::-.,~~;;;========;;;:~-...,--------,*/

This isn't my code, I was trying to deobfuscate someone else's code a bit.