do_ellipse (3) Linux Manual Page

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

Index