太极C++：太极与c++两个之间有什么关系？
本人从事在线教育c++十年工作经验现在精心整理了一套从小白到项目实践开发各种学习资料如果你想学想加入我们请关注我在私信回复“编程”就可以领取学习资料！！！
C 语言画图之画个太极图
呵呵昨天花了一个圆，今天想画个太极图，我知道没啥技术含量，但是挺有意思的，希望各位看官不要鄙视我不务正业，画完此图，不再做这些事情。
先展示下画出来的图像的情况，因为不支持pgm格式的图像，所以我用的 QQ截图：
今天，二话不说上代码。同时再次致谢Banu前辈。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
typedef struct {
size_t width;
size_t height;
unsigned char *data;
} Image;
static Image *
image_new (size_t width,
size_t height)
{
Image *image;
image = malloc (sizeof *image);
image->width = width;
image->height = height;
image->data = malloc (width * height);
return image;
}
static void
image_free (Image *image)
{
free (image->data);
free (image);
}
static void
image_fill (Image *image,
unsigned char value)
{
memset (image->data, value, image->width * image->height);
}
/**
* image_set_pixel:
*
* Sets a pixel passed in signed (x, y) coordinates, where (0,0) is at
* the center of the image.
**/
static void
image_set_pixel (Image *image,
ssize_t x,
ssize_t y,
unsigned char value)
{
size_t tx, ty;
unsigned char *p;
tx = (image->width / 2) + x;
ty = (image->height / 2) + y;
p = image->data + (ty * image->width) + tx;
*p = value;
}
static void
image_save (const Image *image,
const char *filename)
{
FILE *out;
out = fopen (filename, "wb");
if (!out)
return;
fprintf (out, "P5");
fprintf (out, "%zu %zu", image->width, image->height);
fprintf (out, "255");
fwrite (image->data, 1, image->width * image->height, out);
fclose (out);
}
static void draw_Taijitu(Image *image,int radius,int value)
{
int x,y;
int rlimit ,llimit;
int radius_2 = radius*radius;
for(y = -radius;y<radius;y++)
for(x= -radius;x<radius;x++)
if(x*x+y*y <= radius_2)
image_set_pixel(image,x,y,0xff);
for(y = -radius;y<0;y++)
for(x = 0;x<radius;x++)
if((x*x)+(y*y) <= radius_2)
image_set_pixel(image,x,y,value);
for(y = -radius;y<0;y++)
for(x = -(int)sqrt((double)(-radius*y-y*y));x<0;x++)
image_set_pixel(image,x,y,value);
for(y = 0;y<radius;y++)
{
llimit = (int)sqrt((double)(radius*y - y*y));
rlimit = (int)sqrt((double)(radius_2 - y*y));
for(x = llimit;x<rlimit;x++)
image_set_pixel(image,x,y,value);
}
for(y = 2*radius/6;y<4*radius/6;y++)
{
rlimit =(int) sqrt((double)(radius*y-y*y-2*radius_2/9));
llimit = -rlimit;
for(x = llimit;x<rlimit;x++)
image_set_pixel(image,x,y,value);
}
for(y = -4*radius/6;y<-2*radius/6;y++)
{
rlimit = sqrt(-radius*y-y*y-2*radius_2/9);
llimit = -rlimit;
for(x = llimit;x<rlimit;x++)
image_set_pixel(image,x,y,0xff);
}
return ;
}
int
main (int argc, char *argv[])
{
Image *image;
image = image_new (800, 800);
image_fill (image, 0xaa);
draw_Taijitu (image, 300, 0);
image_save (image, "taiji_6.pgm");
image_free (image);
return 0;
}
本人从事在线教育c++十年工作经验现在精心整理了一套从小白到项目实践开发各种学习资料如果你想学想加入我们请关注我在私信回复“编程”就可以领取学习资料！！！