# AsciiDonut
from:https://www.a1k0n.net/2011/07/20/donut-math.html
```c++
#include <windows.h>
#pragma hdrstop
#pragma argsused
#include <math.h>
#include <tchar.h>
#include <stdio.h>
void rotate_donut_3D(void)
{ // Originally Code by Andy Sloane https://www.a1k0n.net/2011/07/20/donut-math.html
int k; //by Andy Sloane
system("cls"); //C++ Builder
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]=
".,-~:;=!*#$@"[N>0?N:0];}} /*#****!!-*/
printf("\x1b[H");for(k=0;1761>k;k++)
putchar(k%80?b[k]:10);A+=0.04;B+=
0.02;}/*****####*******!!=;:~
~::==!!!**********!!!==::-
.,~~;;;========;;;:~-.
..,--------,*/
}
int _tmain(int argc, _TCHAR* argv[])
{
rotate_donut_3D();
return 0;
}
```
```c++
#include <math.h>
#include <windows.h>
#include <stdio.h>
void rotate_donut_3D(void)
{
int k;
// system("cls"); //清空控制台
float A = 0, B = 0, i, j, z[1760];
char b[1760];
printf("\x1b[2J"); //清空控制台
for (;;)
{
memset(b, 32, 1760);//22x80分辨率
memset(z, 0, 7040);//float四个字节
for (j = 0; 6.28 > j; j += 0.07)//j为θ
for (i = 0; 6.28 > i; i += 0.02)//i为φ
{
float c = sin(i), d = cos(j), e = cos(A), f = sin(j), g = sin(A),
h = d + 2, //2为R2,R1为1
D = 1 / (c * h * e + f * g + 5),//D,深度的倒数，5为甜甜圈物理中心到屏幕的z距离
t = c * h * g - f * e,
l = cos(i), m = cos(B), n = sin(B);
int x = 40 + 30 * D * (l * h * m - t * n),
y = 12 + 15 * D * (l * h * n + t * m),
o = x + 80 * y,
N = 8 * ((f * e - c * d * g) * m - c * d * e - f * g - l * d * n);
if (22 > y && y > 0 && x > 0 && 80 > x && D > z[o])
{
z[o] = D;
b[o] = ".,-~:;=!*#$@"[N > 0 ? N : 0];
}
}
printf("\x1b[H");//光标移动到起始位置
for (k = 0; 1761 > k; k++)
putchar(k % 80 ? b[k] : 10);
A += 0.04;
//B += 0.02;
}
}
int main()
{
rotate_donut_3D();
return 0;
}
```
ascii甜甜圈
