用C++画心（转）

原地址https://www.zhihu.com/topic/19613730/top-answers

首先上一个动态的心

代码如下：

 #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 - ;
     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;
 }
 //跳动的心
 int main() {
     HANDLE o = GetStdHandle(STD_OUTPUT_HANDLE);
     _TCHAR buffer[][] = { _T(' ') };
     _TCHAR ramp[] = _T(".:-=+*#%@");

     for (float t = 0.0f;; t += 0.1f) {
         int sy = ;
         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++][];
             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 = ; sy < ; sy++) {
             COORD coord = { , sy };
             SetConsoleCursorPosition(o, coord);
             WriteConsole(o, buffer[sy], , NULL, );
         }
         Sleep();
     }
 }

代码：

 #include <stdio.h>
 #include <math.h>

 float f(float x, float y, float z) {
     float a = x * x + 9.0f / 4.0f * y * y + z * z - ;
     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;
 }
 //3D黑白♥
 int main() {
     for (float z = 1.5f; z > -1.5f; z -= 0.05f) {
         for (float x = -1.5f; x < 1.5f; x += 0.025f) {
             float v = f(x, 0.0f, z);
             if (v <= 0.0f) {
                 float y0 = h(x, z);
                 float ny = 0.01f;
                 float nx = h(x + ny, z) - y0;
                 float nz = h(x, z + ny) - y0;
                 float nd = 1.0f / sqrtf(nx * nx + ny * ny + nz * nz);
                 float d = (nx + ny - nz) * nd * 0.5f + 0.5f;
                 putchar(".:-=+*#%@"[(int)(d * 5.0f)]);
             }
             else
                 putchar(' ');
         }
         putchar('\n');
     }
     getchar();
 }