Computer Graphics Lab Codings-DDA LINE DRAWING ALGORITHM

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#include "stdio.h"

#include "conio.h"

#include "math.h"

#include "graphics.h"

main()

{

int gd=DETECT,gm;

int xa,xb,ya,yb;

int dx,dy,steps,k,xinc,yinc,x,y;

initgraph(&gd,&gm,"c:\\tc\\bgi");

printf("Enter the two left end pixel points(xa,ya):\n");

scanf("%d%d",&xa,&ya);

printf("Enter the two Right end pixel points(xb,yb):\n");

scanf("%d%d",&xb,&yb);

dx=xb-xa;

dy=yb-ya;

if(abs(dx)>abs(dy))

steps=abs(dx);

else

steps=abs(dy);

xinc=dx/steps;

yinc=dy/steps;

x=xa;

y=ya;

putpixel(x,y,6);

for(k=1;k<=steps;k++)

{

x=x+xinc;

y=y+yinc;

putpixel(x,y,6);

}

getch();

return(0);

}

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