使用抛物样条曲线法画出一个猫头 C语言
时间: 2024-05-05 13:15:50 浏览: 131
抱歉,作为AI语言模型,我无法生成图像。但是,我可以提供以下C语言代码,其中使用了抛物线样条曲线法来绘制一个猫头:
```
#include <graphics.h>
#include <math.h>
void drawCatHead()
{
int gd = DETECT, gm;
initgraph(&gd, &gm, "");
float x[10] = {0, 50, 100, 150, 200, 250, 300, 350, 400, 450};
float y[10] = {100, 50, 25, 10, 0, 10, 25, 50, 100, 150};
float h[10], b[10], u[10], v[10], z[10];
float a[10], c[10], d[10], l[10], m[10], p[10], q[10], r[10], s[10], t[10], f[10], g[10], j[10], k[10];
// initialize values of h, b, and u
for (int i = 1; i < 9; i++)
{
h[i] = x[i] - x[i - 1];
b[i] = (y[i] - y[i - 1]) / h[i];
u[i] = 2 * (h[i - 1] + h[i]);
}
// initialize values of v, z, and a
v[1] = h[1] / u[1];
z[1] = 6 * (b[1] - b[0]) / u[1];
for (int i = 2; i < 9; i++)
{
v[i] = h[i] / (u[i] - h[i - 1] * v[i - 1]);
z[i] = (6 * (b[i] - b[i - 1]) - h[i - 1] * z[i - 1]) / (u[i] - h[i - 1] * v[i - 1]);
}
a[9] = 0;
for (int i = 8; i >= 1; i--)
{
a[i] = z[i] - v[i] * a[i + 1];
}
// initialize values of c, d, l, m, p, q, r, s, t, f, g, j, and k
for (int i = 1; i < 9; i++)
{
c[i] = y[i - 1];
d[i] = (y[i] - y[i - 1]) / h[i] - h[i] * (a[i + 1] + 2 * a[i]) / 6;
l[i] = a[i] / (6 * h[i]);
m[i] = a[i + 1] / (6 * h[i]);
p[i] = (y[i] - y[i - 1]) / h[i] - h[i] * (2 * a[i] + a[i + 1]) / 6;
q[i] = (y[i] - y[i - 1]) / h[i] - h[i] * (a[i] + a[i + 1]) / 3;
r[i] = y[i];
s[i] = (y[i] - y[i - 1]) / h[i] - h[i] * (a[i] + 2 * a[i + 1]) / 6;
t[i] = -a[i + 1] / (6 * h[i]);
f[i] = x[i - 1];
g[i] = y[i];
j[i] = x[i];
k[i] = y[i];
}
// draw the cat head using parabolic spline interpolation
for (float i = 1; i < 9; i += 0.01)
{
float xCoord = i;
float interval = floor(i);
float yCoord = c[interval] + d[interval] * (xCoord - x[interval]) + l[interval] * pow(xCoord - x[interval], 3) + m[interval] * pow(xCoord - x[interval], 4);
if (i < 2)
{
putpixel(xCoord, yCoord, WHITE);
}
else if (i < 3)
{
putpixel(xCoord, yCoord, YELLOW);
}
else if (i < 4)
{
putpixel(xCoord, yCoord, RED);
}
else if (i < 5)
{
putpixel(xCoord, yCoord, GREEN);
}
else if (i < 6)
{
putpixel(xCoord, yCoord, CYAN);
}
else if (i < 7)
{
putpixel(xCoord, yCoord, MAGENTA);
}
else if (i < 8)
{
putpixel(xCoord, yCoord, LIGHTGRAY);
}
else
{
putpixel(xCoord, yCoord, BLUE);
}
}
getch();
closegraph();
}
int main()
{
drawCatHead();
return 0;
}
```
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