Function update_player_regions

src/region.c:581–592

* Checks player's regions after a teleport for instance. */

 * Checks player's regions after a teleport for instance.
 */
void
update_player_regions(void)
{
    int i;

    for (i = 0; i < svn.n_regions; i++)
        if (!gr.regions[i]->attach_2_u
            && inside_region(gr.regions[i], u.ux, u.uy))
            set_hero_inside(gr.regions[i]);
        else
            clear_hero_inside(gr.regions[i]);
}

/*
 * Ditto for a specified monster.