Function peffect_invisibility

src/potion.c:810–838

}

staticfn void
peffect_invisibility(struct obj *otmp)
{
    boolean is_spell = (otmp->oclass == SPBOOK_CLASS);

    /* spell cannot penetrate mummy wrapping */
    if (is_spell && BInvis && uarmc->otyp == MUMMY_WRAPPING) {
        You_feel("rather itchy under %s.", yname(uarmc));
        return;
    }
    if (Invis || Blind || BInvis) {
        gp.potion_nothing++;
    } else {
        self_invis_message();
    }
    if (otmp->blessed && !rn2(HInvis ? 15 : 30))
        HInvis |= FROMOUTSIDE;
    else
        incr_itimeout(&HInvis, d(6 - 3 * bcsign(otmp), 100) + 100);
    newsym(u.ux, u.uy); /* update position */
    if (otmp->cursed) {
        pline("For some reason, you feel your presence is known.");
        aggravate();

        /* doing this gives temporary invisibility, but removes permanent
           invisibility */
        HInvis &= ~FROMOUTSIDE;
    }
}

staticfn void
peffect_see_invisible(struct obj *otmp)