BRESENHAM’s LINE DRAWING ALGORITHM

BRESENHAM’s LINE DRAWING ALGORITHM

#include<stdio.h>

#include<conio.h>

#include<math.h>

#include<graphics.h>

void linebrel(int,int,int,int);

void main()

{

int gd=DETECT ,gm,xa,xb,ya,yb;

clrscr();

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

printf("Enter the starting points of the line:");

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

printf("Enter the ending points of the line:");

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

linebrel(xa,ya,xb,yb);

getch();

}

void linebrel(int xa,int ya,int xb,int yb)

{

int dx=abs(xa-xb),dy=abs(ya-yb);

int p=2*dy-dx;

int twody=2*dy,twodydx=2*(dy-dx);

int x,y,xend;

if(xa>xb)

{

x=xb;

y=yb;

xend=xa;

}

else

{

x=xa;

y=ya;

xend=xb;

}

putpixel(x,y,6);

while(x<xend)

{

x++;

if(p<0)

p+=twody;

else

{

y++;

p+twodydx;

}

putpixel(x,y,6);

}

}

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About Admin MC3

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