Source Code Solutions Graphics and Multimedia Lab Implementation of DDA Line Drawing Algorithm [CS1255 - Graphics and Multimedia Lab]

Implementation of DDA Line Drawing Algorithm [CS1255 - Graphics and Multimedia Lab]

AIM:
                  To write a "C++" program for the implementation of DDA line drawing algorithm in CS1255 - Graphics and Multimedia Lab.

SOURCE CODE:
#include<iostream.h>
#include<conio.h>
#include<math.h>
#include<graphics.h>
class lineDDA
{
private:
int dx,dy,x,y,xi,yi,xa,ya,xb,yb,step,k;
public:
void getdata();
void line();
};
void lineDDA::getdata()
{
cout<<"\n\tEnter xa and ya :";
cin>>xa>>ya;
cout<<"\n\tEnter xb and yb :";
cin>>xb>>yb;
}
void lineDDA::line()
{
dx=abs(xb-xa);
dy=abs(yb-ya);
   if(dx>dy)
     step=dx;
   else
     step=dy;
   xi=(xb-xa)/step;
   yi=(yb-ya)/step;
   x=xa;
   y=ya;
   putpixel(abs(x),abs(y),1);
   for(k=1;k<=step;k++)
    {
     x+=xi;
     y+=yi;
     putpixel(abs(x),abs(y),1);
    }
}
void main()
{
lineDDA l;
clrscr();
int gd=DETECT,gm;
initgraph(&gd,&gm,"C:/TC/BGI");
l.getdata();
l.line();
getch();
closegraph();
}

OUTPUT: