ellipse

Syntax

#include <graphics.h>

void ellipse(int x, int y, int stangle, int endangle, int xradius, int yradius);

Description

ellipse draws an elliptical arc in the current drawing color with its center at (x,y) and the horizontal and vertical axes given by xradius and yradius, respectively. The ellipse travels from stangle to endangle. If stangle equals 0 and endangle equals 360, the call to ellipse draws a complete ellipse.

The angle for ellipse is reckoned counterclockwise, with 0 degrees at 3 o'clock, 90 degrees at 12 o'clock, and so on.

The linestyle parameter does not affect arcs, circles, ellipses, or pie slices. Only the thickness parameter is used.

Return Value

None.

See also

arc

circle

fillellipse

sector

Example

/* ellipse example */ 



#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>



int main(void)

{

   /* request autodetection */

   int gdriver = DETECT, gmode, errorcode;

   int midx, midy;

   int stangle = 0, endangle = 360;

   int xradius = 100, yradius = 50;



   /* initialize graphics and local variables */

   initgraph(&gdriver, &gmode, "");



   /* read result of initialization */

   errorcode = graphresult();

   if (errorcode != grOk) {  /* an error occurred */



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

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

      getch();

      exit(1);               /* terminate with an error code */

   }



   midx = getmaxx() / 2;

   midy = getmaxy() / 2;

   setcolor(getmaxcolor());



   /* draw ellipse */

   ellipse(midx, midy, stangle, endangle, xradius, yradius);



   /* clean up */

   getch();

   closegraph();

   return 0;

}