do_circle (3) Linux Manual Page

NAME

do_circle – Calculates all the points in a circle. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

void do_circle(BITMAP *bmp, int x, int y, int radius, int d, void (*proc)(BITMAP *bmp, int x, int y, int d));

DESCRIPTION

Calculates all the points in a circle around point (x, y) with radius r, 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_circle(screen, SCREEN_W / 2, SCREEN_H / 2,
          SCREEN_H / 16, flame_color,
          draw_explosion_ring);

SEE ALSO

do_ellipse(3), do_arc(3), do_line(3), circle(3), circlefill(3)

Index