1do_line(3)                      Allegro manual                      do_line(3)
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NAME

6       do_line - Calculates all the points along a line. Allegro game program‐
7       ming library.
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SYNOPSIS

10       #include <allegro.h>
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13       void do_line(BITMAP *bmp, int x1, y1, x2, y2, int d, void  (*proc)(BIT‐
14       MAP *bmp, int x, int y, int d));
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DESCRIPTION

17       Calculates all the points along a line from point (x1, y1) to (x2, y2),
18       calling the supplied function for each one. This will be passed a  copy
19       of the bmp parameter, the x and y position, and a copy of the d parame‐
20       ter, so it is suitable for use with putpixel(). Example:
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22          void draw_dust_particle(BITMAP *bmp, int x, int y, int d)
23          {
24             ...
25          }
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27             do_line(screen, 0, 0, SCREEN_W-1, SCREEN_H-2,
28                     dust_strength, draw_dust_particle);
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SEE ALSO

32       do_circle(3), do_ellipse(3), do_arc(3), line(3)
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36Allegro                          version 4.4.3                      do_line(3)
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