Write C++/Java program to draw circle using Bresenham‘s algorithm. Inherit pixel class.

Second Year Computer Engineering Computer Graphics Programs:

Computer Graphics Lab:

Practical 2:

Write C++/Java program to draw circle using Bresenham‘s algorithm. Inherit pixel class.

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#include <iostream>

#include <graphics.h>

using namespace std;

void circle(int x1,int y1,int r)

{

int x,y,d;

x=0;

y=r;

d=3-(2*r);

while(x<=y)

{

putpixel(x1+x,y1+y,RED);

putpixel(x1-x,y1+y,RED);

putpixel(x1+x,y1-y,RED);

putpixel(x1-x,y1-y,RED);

putpixel(x1+y,y1+x,RED);

putpixel(x1-y,y1+x,RED);

putpixel(x1+y,y1-x,RED);

putpixel(x1-y,y1-x,RED);

x=x+1;

if(d<0)

{

d=d+4*x+6;

}

else

{

d=d+4*(x-y)+10;

y=y-1;

}

delay(40);

}

}

int main()

{

int x1,y1,r;

cout<<"Enter the starting co-ordinates of a center:";

cin>>x1>>y1;

cout<<"Enter the value of radius:";

cin>>r;

int gd=DETECT,gm;

initgraph(&gd,&gm,NULL);

circle(x1,y1,r);

getch();

closegraph();

        return 0;

}

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