1do_ellipse(3) Allegro manual do_ellipse(3)
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6 do_ellipse - Calculates all the points in an ellipse. Allegro game pro‐
7 gramming library.
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10 #include <allegro.h>
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13 void do_ellipse(BITMAP *bmp, int x, int y, int rx, ry, int d, void
14 (*proc)(BITMAP *bmp, int x, int y, int d));
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17 Calculates all the points in an ellipse around point (x, y) with radius
18 rx and ry, calling the supplied function for each one. This will be
19 passed a copy of the bmp parameter, the x and y position, and a copy of
20 the d parameter, so it is suitable for use with putpixel(). Example:
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22 void draw_explosion_ring(BITMAP *bmp, int x, int y, int d)
23 {
24 ...
25 }
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27 do_ellipse(screen, SCREEN_W/2, SCREEN_H/2,
28 SCREEN_H/16, SCREEN_H/32, flame_color,
29 draw_explosion_ring);
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33 do_circle(3), do_arc(3), do_line(3), ellipse(3), ellipsefill(3)
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37Allegro version 4.2.3 do_ellipse(3)