NAME

do_ellipse - Calculates all the points in an ellipse. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

void do_ellipse(BITMAP *bmp, int x, int y, int rx, ry, int d, void (*proc)(BITMAP *bmp, int x, int y, int d));

DESCRIPTION

Calculates all the points in an ellipse around point (x, y) with radius rx and ry, calling the supplied function for each one. This will be passed a copy of the bmp parameter, the x and y position, and a copy of the d parameter, so it is suitable for use with putpixel(). Example:

   void draw_explosion_ring(BITMAP *bmp, int x, int y, int d)


   {


      ...


   }


   


      do_ellipse(screen, SCREEN_W/2, SCREEN_H/2,


                SCREEN_H/16, SCREEN_H/32, flame_color,


                draw_explosion_ring);

SEE ALSO

do_circle(3alleg4), do_arc(3alleg4), do_line(3alleg4), ellipse(3alleg4), ellipsefill(3alleg4)