#include <stdio.h>

#include <math.h>

#include <windows.h>

#include <tchar.h>

float f(float x, float y, float z)

{

float a = x * x + 9.0f / 4.0f * y * y + z * z - 1;

return a * a * a - x * x * z * z * z - 9.0f / 80.0f * y * y * z * z * z;

}

float h(float x, float z)

{

for (float y = 1.0f; y >= 0.0f; y -= 0.001f)

if(f(x,y,z) <= 0.0f)

return y;

return 0.0f;

}

int main()?

{

system("color 04");

HANDLE o = GetStdHandle(STD_OUTPUT_HANDLE);

_TCHAR buffer[25][80] = { _T(' ') };

_TCHAR ramp[] = _T(".:-=+*#%@");

for (float t = 0.0f;;t += 0.1f)

{

int sy = 0;

float s = sinf(t);

float a = s * s * s * s * 0.2f;

for (float z = 1.3f;z >- 1.2f;z -= 0.1f)

{

_TCHAR* p = &buffer[sy++][0];

float tz = z * (1.2f - a);

for (float x =- 1.5f;x < 1.5f;x += 0.05f)

{

float tx = x * (1.2f + a);

float v = f(tx, 0.0f, tz);

if(v <= 0.0f)

{

float y0 = h(tx, tz);

float ny = 0.01f;

float nx = h(tx + ny, tz) - y0;

float nz = h(tx, tz + ny) - y0;

float nd = 1.0f / sqrtf(nx * nx + ny * ny + nz * nz);

float d = (nx + ny - nz)* nd * 0.5f + 0.5f;

*p++ = ramp[(int)(d * 5.0f)];

}

else

*p++= ' ';

}

}

for (sy = 0 ; sy < 25; sy++)

{

COORD coord = { 0, sy };

SetConsoleCursorPosition(o, coord);

WriteConsole(o,buffer[sy],79, NULL,0);

}

Sleep(33);

}

printf("\n");

return 0;

}