IMPLEMENTATION OF BRESENHAM’S LINE DRAWING

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void main()

{

            int gd=DETECT,gm;

            int x0,y0,x1,y1,dx,dy,p0,s,t,color;

            clrscr();

            printf("Enter the starting coordinates(x0,y0):\n");

            scanf("%d%d",&x0,&y0);

            printf("Enter the ending coordinates(x1,y1):\n");

            scanf("%d%d",&x1,&y1);

            printf("Enter integer to select color:");

            scanf("%d",&color);

            initgraph(&gd,&gm,"C:/BC/BGI");

            if(x1<x0)

            {

             t=x0;x0=x1;x1=t;

             t=y0;y0=y1;y1=t;

            }         

            dx=x1-x0;

            dy=y1-y0;

            p0=(2*dy)-dx;

            putpixel(x0,y0,color);

            color=color+10;

            while(x0<x1)

            {

               if(p0<0)

              {

                x0=x0+1;

                p0=p0+(2*dy);

              }

              else

              {

               x0=x0+1;

               y0=y0+1;

              p0=p0+(2*dy)-(2*dx);

            }

             putpixel(x0,y0,color);

             color=color+10;

            }

            getch();

}

OUTPUT:

Enter the starting coordinates(x0,y0):0 0

Enter the ending coordinates(x1,y1):100 100

Enter integer to select color:6