CG-2015

PROGRAM 1

Aim – Write a program to implement basic functions

PROGRAM CODE

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void main()

{

  int gd=DETECT,gm;

  initgraph(&gd,&gm,"C:\\TurboC3\\BGI");

  setcolor(BLUE);

    rectangle(100,200,300,400);

  setcolor(GREEN);

    circle(190,150,20);

  setcolor(GREEN);

    line(100,200,190,20);

  setcolor(RED);

    line(300,200,190,20);

  setcolor(YELLOW);

    rectangle(220,400,180,300);

  setcolor(RED);

    line(100,200,190,20);

  getch();

  closegraph();

}

 

PROGRAM 2

Aim – Write a program to implement Digital Differential Analyzer(DDA) alogorithm

PROGRAM CODE

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void main()

{

  int gd=DETECT,gm,i;

  float x1,x2,y1,y2,dx,dy,xinc,yinc,step;

  clrscr();

  initgraph(&gd,&gm,"C:\\TurboC3\\BGI");

  printf("\n Enter the starting coordinate ");

  scanf("%f%f",&x1,&y1);

  printf("\n Enter the end coordinate ");

  scanf("%f%f",&x2,&y2);

  dx=x2-x1;

  dy=y2-y1;

  if(dy<dx)

  step=dx;

  else

  step=dy;

  xinc=dx/step;

  yinc=dy/yinc;

  for(i=0;i<step;i++)

    {

      putpixel(x1,y1,1);

      x1=x1+xinc;

      y1=y1+yinc;

      delay(100);

    }

  getch();

  closegraph();

}

OUTPUT

Enter the starting coordinate  0  425

Enter the end coordinate  950 425

PROGRAM 3

Aim – Write a program to implement Bresenham’s Line alogorithm

PROGRAM CODE

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

void main()

{

  int gd=DETECT,gm,i;

  float x1,x2,y1,y2,dx,dy,d;

  clrscr();

  initgraph(&gd,&gm,"C:\\TurboC3\\BGI");

  printf("\n Enter the starting coordinate ");

  scanf("%d%d",&x1,&y1);

  printf("\n Enter the end coordinate ");

  scanf("%d%d",&x2,&y2);

  dx=x2-x1;

  dy=y2-y1;

  d=2*dy-dx;

  putpixel(x1,y1,WHITE);

  while(x1<=x2)

   {

     if(d<0)

      {

      x1=x1+1;

      d=d+2*dy;

      }

     else

      {

     x1=x1+1;

     y1=y1+1;

     d=d+2*(dy-dx);

    }

   putpixel(x1,y1,WHITE)

  getch();

  closegraph();

  }

}

OUTPUT

Enter the starting coordinate  0  425

Enter the end coordinate  950 425

PROGRAM 4

Aim – Write a program to implement Mid-Point Circle Alogorithm

PROGRAM CODE

#include<conio.h>

#include<stdio.h>

#include<graphics.h>

void main()

{

int gd=DETECT,gm;

int i,r,x,y,xc,yc;

float d;

clrscr();

initgraph(&gd,&gm,"C:\\TurboC3\\BGI");

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

printf("Enter Radius\n");

scanf("%d",&r);

printf("Enter Center of circle\n");

scanf("%d",&xc);

scanf("%d",&yc);

d=1.25-r;

x=0;

y=r;

do

{

  if(d<0)

   {

       x=x+1;

       d=d+2*x+1;

   }

  else

   {

      x=x+1;

      y=y-1;

      d=d+2*x-2*y+10;

   }

putpixel(xc+x,yc+y,5);

putpixel(xc-y,yc-x,5);

putpixel(xc+y,yc-x,5);

putpixel(xc-y,yc+x,5);

putpixel(xc+y,yc+x,5);

putpixel(xc-x,yc-y,5);

putpixel(xc+x,yc-y,5);

putpixel(xc-x,yc+y,5);

}

while(x<y);

getch();

}

OUTPUT

Enter Radius      50

Enter Center of circle  150   150

PROGRAM 5

Aim – Write a program to implement Bresenham’s Circle Drawing Alogorithm

PROGRAM CODE

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
#include<math.h>

void main()  {    int gd=DETECT,gm;    int d,r,x,y,xc,yc;    clrscr();    initgraph(&gd,&gm,"C:\\TurboC3\\BGI");    printf("Enter Radius\n");    scanf("%d",&r);    printf("Enter Center of circle\n");    scanf("%d",&xc);    scanf("%d",&yc);    d=3-2*r;    x=0;    y=r;    while(x<=y)      {         putpixel(xc+x,yc+y,5);         putpixel(xc-y,yc-x,5);         putpixel(xc+y,yc-x,5);         putpixel(xc-y,yc+x,5);         putpixel(xc+y,yc+x,5);         putpixel(xc-x,yc-y,5);         putpixel(xc+x,yc-y,5);         putpixel(xc-x,yc+y,5);         if(d<=0)           {              d=d+4*x+6;           }         else           {              d=d+4*x-4*y+10;              y=y-1;           }         x=x+1;      } getch(); }

OUTPUT

Enter Radius                60

Enter Center of circle    130   130

 

PROGRAM 6

Aim – Write a program to implement Bresenham’s Ellipse Drawing Alogorithm

PROGRAM CODE

#include "stdio.h"

#include "conio.h"

#include "math.h"

#include "graphics.h"

main()

{

                    int gd=DETECT,gm;

                    int xcenter,ycenter,rx,ry;

                    int p,x,y,px,py,rx1,ry1,rx2,ry2;

                    initgraph(&gd,&gm,"C:\\TurboC3\\BGI");

                    printf("Enter The Radius Value:\n");

                    scanf("%d%d",&rx,&ry);

                    printf("Enter The xcenter and ycenter Values:\n");

                    scanf("%d%d",&xcenter,&ycenter);

                    ry1=ry*ry;

                    rx1=rx*rx;

                    ry2=2*ry1;

                    rx2=2*rx1;

/* REGION 1 */

x=0;

                    y=ry;

                    plotpoints(xcenter,ycenter,x,y);

                    p=(ry1-rx1*ry+(0.25*rx1));

                    px=0;

                    py=rx2*y;

                    while(px<py)

                    {

                              x=x+1;

                             px=px+ry2;

                             if(p>=0)

                                       y=y-1;

                                       py=py-rx2;

                               if(p<0)

                                       p=p+ry1+px;

                              else

                                        p=p+ry1+px-py;

                    plotpoints(xcenter,ycenter,x,y);

/* REGION 2*/

                  

p=(ry1*(x+0.5)*(x+0.5)+rx1*(y-1)*(y-1)-rx1*ry1);

                   while(y>0)

                   {

                             y=y-1;

                             py=py-rx2;

                              if(p<=0)

                             {

                                       x=x+1;

                                       px=px+ry2;

                              }

                              if(p>0)

                                       p=p+rx1-py;

                             else

                                      p=p+rx1-py+px;

                     plotpoints(xcenter,ycenter,x,y);

                   }

               }

                    getch();

                    return(0);

            }

int plotpoints(int xcenter,int ycenter,int x,int y)

{

                    putpixel(xcenter+x,ycenter+y,6);

                    putpixel(xcenter-x,ycenter+y,6);

                    putpixel(xcenter+x,ycenter-y,6);

                    putpixel(xcenter-x,ycenter-y,6);

}

OUTPUT

Enter The Radius Value(Rx,Ry)           :     10      30

                  

Enter The xcenter and ycenter Values  :     300    150