bionic (3) do_line.3alleg4.gz

NAME

       do_line - Calculates all the points along a line. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void do_line(BITMAP *bmp, int x1, y1, x2, y2, int d, void (*proc)(BITMAP *bmp, int x, int y, int d));

DESCRIPTION

       Calculates all the points along a line from point (x1, y1) to (x2, y2), 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_dust_particle(BITMAP *bmp, int x, int y, int d)
          {
             ...
          }

             do_line(screen, 0, 0, SCREEN_W-1, SCREEN_H-2,
                     dust_strength, draw_dust_particle);

SEE ALSO

       do_circle(3alleg4), do_ellipse(3alleg4), do_arc(3alleg4), line(3alleg4)