#include
#include
#include
#include
#include
class Circle
{
private:
int gd,gm,x,y,r;
float d;
public:
void get();
void bres();
Circle();
~Circle();
}
Circle::Circle()
{
gd=DETECT;
initgraph(&gd,&gm,"K:\\tc\\bgi");
}
void Circle::get()
{
outtextxy(10,30,"Enter the radius of circle");
cin>>r;
}
Circle::~Circle()
{
closegraph();
}
void Circle::bres()
{
cleardevice();
outtextxy(100,10,"Bresenham's circle drawing algorithm");
get();
x=0;y=r;d=3-(2*r);
do
{
putpixel(200+x,200+y,15);
putpixel(200+y,200+x,15);
putpixel(200+y,200-x,15);
putpixel(200+x,200-y,15);
putpixel(200-x,200-y,15);
putpixel(200-y,200-x,15);
putpixel(200-y,200+x,15);
putpixel(200-x,200+y,15);
if(d<=0)
d=d+(4*x)+6;
else
{
d=d+(4*(x-y))+10;
y=y-1;
}
x++;
delay(10);
} while(x }
void main()
{
clrscr();
Circle c;
c.bres();
getch();
}
 Attachments
bresenham circle drawing algorithm (2190-17254-BRESENHAM circle.doc)
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