- Thuat toan Bresenham de ve duong tron */
#include <graphics.h>
#include <conio.h>
void Bresenham_Circle(int xc, int yc, int Radius, int color)
{
int x, y, d;
x = 0;
y = Radius;
d = 3 - 2 * Radius;
while (x <= y)
{
putpixel(xc + x, yc + y, color);
putpixel(xc - x, yc + y, color);
putpixel(xc + x, yc - y, color);
putpixel(xc - x, yc - y, color);
putpixel(xc + y, yc + x, color);
putpixel(xc - y, yc + x, color);
putpixel(xc + y, yc - x, color);
putpixel(xc - y, yc - x, color);
if (d < 0)
d += 4 * x + 6;
else
{
d += 4 * (x-y) + 10;
y--;
}
x++;
}
}
void main()
{
int gr_drive = DETECT, gr_mode;
initgraph(&gr_drive, &gr_mode, "");
Bresenham_Circle(getmaxx() / 2, getmaxy() / 2, 150, 4);
getch();
closegraph();
}
Tiêu đề: Thuat toan Bresenham de ve duong tron 
10/07/10, 09:55 pm