DRAW A CIRCLE USING MIDPOINT ALGORITHM

DRAW A CIRCLE USING MIDPOINT ALGORITHM

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

#include<dos.h>

void main()

{

   /* request auto detection */

   int gdriver = DETECT, gmode, errorcode;

   int x1,x2,x3,x4,xc,yc,r,y1,y2;

   char msg[15];

   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */

   errorcode = graphresult();

   /* an error occurred */

   if (errorcode != grOk)

   {

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);

   }

   printf("Enter the value for xc,yc,r:");

   scanf("%d%d%d",&xc,&yc,&r);

   circlemidpoint(xc,yc,r);

   getch();

   closegraph();

}

void circlemidpoint(int xc,int yc,int r)

{

int x=0,y=r,p=1-r;

void circleplotpoints(int,int,int,int);

circleplotpoints(xc,yc,x,y);

while(x<y)

{

x++;

if(p<0)

p+=2*x+1;

else

{

y--;

p+=2*(x-y)+1;

}

circleplotpoints(xc,yc,x,y);

}

}

 void circleplotpoints(int xc,int yc,int x,int y)

{

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

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

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

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

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

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

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

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

}

OUTPUT:-

Enter the value for xc, yc, r:

250

150

125

         

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DRAW A LINE USING DDA ALGORITHM

DRAW A LINE USING DDA ALGORITHM

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

#include<dos.h>

#define ROUND(a)((int)(a+0.5))

int main(void)

{

   /* request auto detection */

   int gdriver = DETECT, gmode, errorcode;

   int xa,xb,ya,yb;

  // int y=0,x=0,i;

   char msg[25];

   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */

   errorcode = graphresult();

   /* an error occurred */

   if (errorcode != grOk)

  {

       printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);

  }

 printf("Enter the value for x1,y1:\n");

 scanf("%d%d",&xa,&ya);

 printf("Enter the value for x2,y2:\n");

 scanf("%d%d",&xb,&yb);

 linedda(xa,ya,xb,yb);

 getch();

 closegraph();

  return 0;

}

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

{

int dx=xb-xa,dy=yb-ya,steps,k;

float xincr,yincr,x=xa,y=ya;

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

steps=abs(dy);

else

steps=abs(dy);

xincr=dx/(float)steps;

yincr=dy/(float)steps;

putpixel(ROUND(x),ROUND(y),GREEN);

for(k=0;k<steps;k++)

{

x+=xincr;

y+=yincr;

putpixel(ROUND(x),ROUND(y),GREEN);

}

}

OUTPUT:-

Enter the value for x1,y1:

100

100

Enter the value for x2,y2:

250

300

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DRAW A LINE USING BRESENHAM ALGORITHM

DRAW A LINE USING BRESENHAM ALGORITHM

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

#include<dos.h>

void main()

{

   /* request auto detection */

   int gdriver = DETECT, gmode, errorcode;

   int xa,xb,ya,yb,x,y;

   char msg[25];

   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */

   errorcode = graphresult();

   /* an error occurred */

   if (errorcode != grOk)

   {

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);

  }

  printf("Enter the x1 and y1 value:\n");

  scanf("%d%d",&xa,&ya);

  printf("Enter the x2 and y2 value:\n");

  scanf("%d%d",&xb,&yb);

  linebres(xa,ya,xb,yb);

  getch();

  closegraph();

}

           

 void linebres(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,twodxdy=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,YELLOW);

            while(x<xend)

            {

                        x++;

                        if(p<0)

                                    p+=twody;

                        else

                        {

                                    y++;

                                    p+=twodxdy;

                        }

                        putpixel(x,y,YELLOW);

            }

}

OUTPUT:-

Enter the x1 and y1 value:

100

100

Enter the x2 and y2value:

250

300

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DRAW A HOUSE USING GRAPHIC FUNCTIONS

DRAW A HOUSE USING GRAPHIC FUNCTIONS

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

void main()

{

   /* request auto detection */

   int gdriver = DETECT, gmode, errorcode;

   int xmax, ymax;

   int midx, midy;

   int radius = 10;

   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");

   /* read result of initialization */

   errorcode = graphresult();

   /* an error occurred */

   if (errorcode != grOk)

   {

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);

   }

   setcolor(getmaxcolor());

   xmax = getmaxx();

   ymax = getmaxy();

   /* draw a diagonal line */

   line(150,150,400,150);

   line(150,300,400,300);

   line(150,150,150,300);

   line(400,150,400,300);

   line(150,150,275,50);

   line(400,150,275,50);

   line(275,50,500,50);

   line(400,150,625,150);

   line(500,50,625,150);

   line(625,150,625,300);

   line(400,300,625,300);

   //door

   line(250,300,250,250);

   line(300,300,300,250);

   line(250,250,300,250);

   line(250,300,275,290);

   line(250,250,275,260);

   line(275,290,275,260);

   //window

   line(450,200,550,200);

   line(450,250,550,250);

   line(450,200,450,250);

   line(550,200,550,250);

   line(450,225,550,225);

   line(500,200,500,250);

   circle(275,100,15);

   /* clean up */

   getch();

   closegraph();

}

OUTPUT:-

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PRINT A TEXT USING GRAPHIC FUNCTIONS

PRINT A TEXT USING GRAPHIC FUNCTIONS

#include<stdio.h>

#include<conio.h>

#include<graphics.h>

#include<dos.h>

void main()

{

            int gd=DETECT,gm,errorcode;

            int y=0,x=0;

            int i;

            char msg[80];

            initgraph(&gd,&gm,"");

            errorcode=graphresult();

            if(errorcode!=grOk)

            {

                        printf("Graphics error %s\n",grapherrormsg(errorcode));

                        printf("Press any key to halt");

                        getch();

                        exit(1);

            }

            for(i=1;i<=6;i++)

            {

                        settextstyle(TRIPLEX_FONT,HORIZ_DIR,i);

                        sprintf(msg,"Text");

                        outtextxy(x,y,msg);

                        y+=textheight(msg);

                        x+=textwidth(msg);

            }

            getch();

            closegraph();

}

OUTPUT:-

Text

       Text

            Text

               Text

                 Text

                Text

                   

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