Ellipse Drawing Algorithm in Computer Graphics

#include<graphics.h>

#include<stdio.h>

#include<conio.h>

#include<math.h>

void drawellipse(int, int, int, int);

void main()

{

  int gd=DETECT,gm;

  initgraph(&gd,&gm,"c:\\tc\\bgi");

  

  int xc,yc,rx,ry;

  xc=getmaxx()/2;

  yc=getmaxy()/2;

  rx=100;

  ry=80;

  drawellipse(xc,yc,rx,ry);

  getch();

  closegraph();

}

void drawellipse(int xc,int yc,int rx,int ry)

{

  int x,y;

  float theta;

  const float PI=3.14;

  for(theta=0.0;theta<=360;theta++)

  {

    x= xc+rx*cos(theta*PI/180.0);

    y= yc+ry*sin(theta*PI/180.0);

    putpixel(x,y,1);

    delay(10);

  }

}

OUTPUT:

Mid-Point Ellipse Drawing Algorithm >>