Function rnd_nextto_goodpos

src/trap.c:4946–4972

pick a random goodpos() next to x,y for monster mtmp. mtmp could be &gy.youmonst, uses then crawl_destination(). returns TRUE if any good position found, with the coord in x,y */

   mtmp could be &gy.youmonst, uses then crawl_destination().
   returns TRUE if any good position found, with the coord in x,y */
boolean
rnd_nextto_goodpos(coordxy *x, coordxy *y, struct monst *mtmp)
{
    int i, j;
    boolean is_u = (mtmp == &gy.youmonst);
    coordxy nx, ny, k, dirs[N_DIRS];

    for (i = 0; i < N_DIRS; ++i)
        dirs[i] = i;
    for (i = N_DIRS; i > 0; --i) {
        j = rn2(i);
        k = dirs[j];
        dirs[j] = dirs[i - 1];
        dirs[i - 1] = k;
    }
    for (i = 0; i < N_DIRS; ++i) {
        nx = *x + xdir[dirs[i]];
        ny = *y + ydir[dirs[i]];
        /* crawl_destination and goodpos both include an isok() check */
        if (is_u ? crawl_destination(nx, ny) : goodpos(nx, ny, mtmp, 0)) {
            *x = nx;
            *y = ny;
            return TRUE;
        }
    }
    return FALSE;
}

/* print a message about being back on the ground after leaving a pool */
void