Function worm_known

src/worm.c:882–893

worm_known() * Is any segment of this worm in viewing range? Note: caller must check * invisibility and telepathy (which should only show the head anyway). * Mostly used in the canseemon() macro. */

 *  Mostly used in the canseemon() macro.
 */
boolean
worm_known(struct monst *worm)
{
    struct wseg *curr = wtails[worm->wormno];

    while (curr) {
        if (cansee(curr->wx, curr->wy))
            return TRUE;
        curr = curr->nseg;
    }
    return FALSE;
}

/* would moving from <x1,y1> to <x2,y2> involve passing between two
   consecutive segments of the same worm? */