Function impact_arti_light

src/potion.c:1594–1621

used when blessed or cursed scroll of light interacts with artifact light; if the lit object (Sunsword or gold dragon scales/mail) doesn't resist, treat like dipping it in holy or unholy water (BUC change, glow message) */

   if the lit object (Sunsword or gold dragon scales/mail) doesn't resist,
   treat like dipping it in holy or unholy water (BUC change, glow message) */
void
impact_arti_light(
    struct obj *obj, /* wielded Sunsword or worn gold dragon scales/mail */
    boolean worsen,  /* True: lower BUC state unless already cursed;
                      * False: raise BUC state unless already blessed */
    boolean seeit)   /* True: give "<obj> glows <color>" message */
{
    struct obj *otmp;

    /* if already worst/best BUC it can be, or if it resists, do nothing */
    if ((worsen ? obj->cursed : obj->blessed) || obj_resists(obj, 25, 75))
        return;

    /* curse() and bless() take care of maybe_adjust_light() */
    otmp = mksobj(POT_WATER, TRUE, FALSE);
    if (worsen)
        curse(otmp);
    else
        bless(otmp);
    H2Opotion_dip(otmp, obj, seeit, seeit ? Yobjnam2(obj, "glow") : "");
    dealloc_obj(otmp);
#if 0   /* defer this until caller has used up the scroll so it won't be
         * visible; player was told that it disappeared as hero read it */
    if (carried(obj)) /* carried() will always be True here */
        update_inventory();
#endif
    return;
}

/* potion obj hits monster mon, which might be youmonst; obj always used up */
void