Bresenhams Line Drawing Program (Source Code)

Bresenhams Line Drawing Program (Source Code)

/* Breseham's Line Drawing program*/

#include<graphics.h>
#include<math.h>
#include<iostream.h>
#include<conio.h>
#include<dos.h>
void main()
{
 float x,y,x1,y1,x2,y2,dx,dy,e;
 int i,gd=DETECT,gm;
 clrscr();
/* Read two end points of line */
 cout<<"Enter the value of x1 :\t";
 cin>>x1;
 cout<<"Enter the value of y1 :\t";
 cin>>y1;
 cout<<"Enter the value of x2 :\t";
 cin>>x2;
 cout<<"Enter the value of y2 :\t";
 cin>>y2;
/* Initialise graphics mode*/
 initgraph(&gd,&gm,"c:/tc/bgi");

   dx=abs(x2-x1);
   dy=abs(y2-y1);
/* Initialise starting point
-----------------------------*/
   x = x1;
   y = y1;
/* Initialise decision variable
-------------------------------- */
   e=2*dy-dx;
   i=1;    /* Initialise loop counter */
do
 {
  putpixel(x,y,WHITE);
  delay(60);
  while(e >= 0)
     {
      y=y+1;
      e=e-2*dx;
     }
  x=x+1;
  e=e+2*dy;
  i=i+1;
 }
while(i <= dx);
 getch();
 closegraph();
}