Draw All Types And Styles of Lines Using Bresenham Algorithm

 Draw all types and styles of lines

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<math.h>

int gdriver=DETECT,gmode;

int dotted_dash[8]={1, 1, 0, 1, 0, 1, 1, 0};

int dotted[8]={1, 0, 1, 0, 1, 0, 1, 0};

int dash[8]={1, 1, 0, 0, 1, 1, 0, 0};

int solid[8]={1, 1, 1, 1, 1, 1, 1, 1};

int value;

void bresenham(int xa, int ya, int xb, int yb, int a[]);

void main()

{

do{

clrscr();

initgraph(&gdriver, &gmode, "C:\\Turboc3\\BGI");

printf("\n************************************\n");

printf("\nPress 1 for Solid Line");

printf("\nPress 2 for Dotted Line");

printf("\nPress 3 for Dash Line");

printf("\nPress 4 for Dotted Dash Line");

printf("\nPress 5 for Exit from the program\n");

printf("\n************************************\n");

printf("\nEnter your Choice : ");

scanf("%d",&value);

switch(value){

     case 1: bresenham(200, 200, 350, 200, solid);

    bresenham(200, 200, 200, 300, solid);

    bresenham(200, 200, 350, 300, solid);

    bresenham(350, 200, 200, 300, solid);

    break;

    case 2: bresenham(200, 200, 350, 200, dotted);

    bresenham(200, 200, 200, 300, dotted);

    bresenham(200, 200, 350, 300, dotted);

    bresenham(350, 200, 200, 300, dotted);

    break;

    case 3: bresenham(200, 200, 350, 200, dash);

    bresenham(200, 200, 200, 300, dash);

    bresenham(200, 200, 350, 300, dash);

    bresenham(350, 200, 200, 300, dash);

    break;

    case 4: bresenham(200, 200, 350, 200, dotted_dash);

    bresenham(200, 200, 200, 300, dotted_dash);

    bresenham(200, 200, 350, 300, dotted_dash);

    bresenham(350, 200, 200, 300, dotted_dash);

    break;

    case 5: printf("Exit");

    break;

    default :printf("Kindly enter valid choice: ");

}

getch();

}while(value!=5);

}

void bresenham(int xa, int ya, int xb, int yb, int a[]){

int p, x, y, dx, dy, twodydx, twody, twodxdy, twodx, xend, yend;

float m;

int i=0;

dx=abs(xa-xb);

dy=abs(ya-yb);

m=(float)(yb-ya)/(xb-xa);

if(dx>dy)

{

p=2*dy-dx;

twody=2*dy;

twodydx=2*(dy-dx);

if(xa>xb)

{

x=xb;

y=yb;

xend=xa;

}

else

{

x=xa;

y=ya;

xend=xb;

}

putpixel(x,y,3);

while(x<xend)

{

x++;

if(p<0)

p=p+twody;

else

{

if(0<m && m<1)

y++;

else

y--;

p=p+twodydx;

}

if(a[i]==1)

putpixel(x,y,3);

i++;

if(i==7)

i=0;

}

}

else

{

p=2*dx-dy;

twodx=2*dx;

twodxdy=2*(dx-dy);

if(ya>yb)

{

x=xb;

y=yb;

yend=ya;

}

else

{

x=xa;

y=ya;

yend=yb;

}

putpixel(x,y,3);

while(y<yend)

{

y++;

if(p<0)

p=p+twodx;

else

{

if(m>=1)

x++;

else

x--;

p=p+twodxdy;

}

if(a[i]==1)

putpixel(x,y,3);

i++;

if(i==7)

i=0;

}

}

}

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