跳动的爱心（c++版）

#include <stdio.h>
#include <math.h>
#include <windows.h>
#include <tchar.h> 
# include<stdlib.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);
     }
 }