心形圖案(C語言)
阿新 • • 發佈:2019-02-13
具有立體感的心形圖案
程式碼
#include <stdio.h>
#include <math.h>
float f(float x, float y, float z) {
float a;
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) {
float y;
for ( y = 1.0f; y >= 0.0f; y -= 0.001f)
if (f(x,y,z) <= 0.0f)
return y;
return 0.0f;
}
int main(void) {
float z,x,v,y0,ny,nx,nz,nd,d;
for ( z = 1.5f; z > -1.5f; z -= 0.05f) {
for ( x = -1.5f; x < 1.5f; x += 0.025f) {
v = f(x,0.0f,z);
if (v <= 0.0f) {
y0 = h(x,z);
ny = 0.01f ;
nx = h(x + ny,z) - y0;
nz = h(x,z + ny) - y0;
nd = 1.0f / sqrtf(nx*nx + ny*ny + nz*nz);
d = (nx + ny - nz)*nd*0.5f + 0.5f;
putchar(".:-=+*#%@"[(int)(d*5.0f)]);
}
else
putchar(' ');
}
putchar ('\n');
}
}