Function flip_level_rnd

src/sp_lev.c:966–982

randomly transpose top with bottom or left with right or both; caller controls which transpositions are allowed */

/* randomly transpose top with bottom or left with right or both;
   caller controls which transpositions are allowed */
void
flip_level_rnd(int flp, boolean extras)
{
    int c = 0;

    /* TODO?
     *  Might change rn2(2) to !rn2(3) or (rn2(5) < 2) in order to bias
     *  the outcome towards the traditional orientation.
     */
    if ((flp & 1) && rn2(2))
        c |= 1;
    if ((flp & 2) && rn2(2))
        c |= 2;

    if (c)
        flip_level(c, extras);
}


staticfn void