arc - Draws a circular arc. Allegro game programming library.
#include <allegro.h>
void arc(BITMAP *bmp, int x, y, fixed ang1, ang2, int r, int
color);
Draws a circular arc with centre x, y and radius r, in an anticlockwise
direction starting from the angle a1 and ending when it reaches a2. These
values are specified in 16.16 fixed point format, with 256 equal to a full
circle, 64 a right angle, etc. Zero is to the right of the centre point, and
larger values rotate anticlockwise from there. Example:
/* Draw a black arc from 4 to 1 o'clock. */
arc(screen, SCREEN_W/2, SCREEN_H/2,
itofix(-21), itofix(43), 50, makecol(0, 0, 0));
circle(3), ellipse(3), drawing_mode(3), makecol(3)