static int arti_invoke(struct obj *obj)
{
const struct artifact *oart = get_artifact(obj);
if (!oart || !oart->inv_prop) {
if (obj->oclass == WAND_CLASS)
return do_break_wand(obj);
else if (obj->oclass == GEM_CLASS || obj->oclass == TOOL_CLASS)
return dorub(obj);
else if (obj->otyp == CRYSTAL_BALL)
use_crystal_ball(obj);
else
pline("Nothing happens.");
return 1;
}
if (oart->inv_prop > LAST_PROP) {
/* It's a special power, not "just" a property */
if (obj->age > moves) {
/* the artifact is tired :-) */
pline("You feel that %s %s ignoring you.",
the(xname(obj)), otense(obj, "are"));
/* and just got more so; patience is essential... */
obj->age += (long) dice(3,10);
return 1;
}
obj->age = moves + rnz(100);
switch(oart->inv_prop) {
case TAMING: {
struct obj pseudo;
boolean unused_known;
pseudo = zeroobj; /* neither cursed nor blessed */
pseudo.otyp = SCR_TAMING;
seffects(&pseudo, &unused_known);
break;
}
case HEALING: {
int healamt = (u.uhpmax + 1 - u.uhp) / 2;
long creamed = (long)u.ucreamed;
if (Upolyd) healamt = (u.mhmax + 1 - u.mh) / 2;
if (healamt || Sick || Slimed || Blinded > creamed)
pline("You feel better.");
else
goto nothing_special;
if (healamt > 0) {
if (Upolyd) u.mh += healamt;
else u.uhp += healamt;
}
if (Sick) make_sick(0L,NULL,FALSE,SICK_ALL);
if (Slimed) Slimed = 0L;
if (Blinded > creamed) make_blinded(creamed, FALSE);
iflags.botl = 1;
break;
}
case ENERGY_BOOST: {
int epboost = (u.uenmax + 1 - u.uen) / 2;
if (epboost > 120) epboost = 120; /* arbitrary */
else if (epboost < 12) epboost = u.uenmax - u.uen;
if (epboost) {
pline("You feel re-energized.");
u.uen += epboost;
iflags.botl = 1;
} else
goto nothing_special;
break;
}
case UNTRAP: {
if (!untrap(TRUE)) {
obj->age = 0; /* don't charge for changing their mind */
return 0;
}
break;
}
case CHARGE_OBJ: {
struct obj *otmp = getobj(recharge_type, "charge");
boolean b_effect;
if (!otmp) {
obj->age = 0;
return 0;
}
b_effect = obj->blessed &&
(Role_switch == oart->role || !oart->role);
recharge(otmp, b_effect ? 1 : obj->cursed ? -1 : 0);
update_inventory();
break;
}
case LEV_TELE:
level_tele();
break;
case CREATE_PORTAL: {
int i, num_ok_dungeons, last_ok_dungeon = 0;
d_level newlev;
extern int n_dgns; /* from dungeon.c */
struct nh_menuitem *items;
items = malloc(n_dgns * sizeof(struct nh_menuitem));
num_ok_dungeons = 0;
for (i = 0; i < n_dgns; i++) {
if (!dungeons[i].dunlev_ureached)
continue;
items[num_ok_dungeons].id = i+1;
items[num_ok_dungeons].accel = 0;
items[num_ok_dungeons].role = MI_NORMAL;
items[num_ok_dungeons].selected = FALSE;
strcpy(items[num_ok_dungeons].caption, dungeons[i].dname);
num_ok_dungeons++;
last_ok_dungeon = i;
}
if (num_ok_dungeons > 1) {
/* more than one entry; display menu for choices */
int n;
int selected[1];
n = display_menu(items, num_ok_dungeons, "Open a portal to which dungeon?", PICK_ONE, selected);
free(items);
if (n <= 0)
goto nothing_special;
i = selected[0] - 1;
} else {
free(items);
i = last_ok_dungeon; /* also first & only OK dungeon */
}
/*
* i is now index into dungeon structure for the new dungeon.
* Find the closest level in the given dungeon, open
* a use-once portal to that dungeon and go there.
* The closest level is either the entry or dunlev_ureached.
*/
newlev.dnum = i;
if (dungeons[i].depth_start >= depth(&u.uz))
newlev.dlevel = dungeons[i].entry_lev;
else
newlev.dlevel = dungeons[i].dunlev_ureached;
if (u.uhave.amulet || In_endgame(&u.uz) || In_endgame(&newlev) ||
newlev.dnum == u.uz.dnum) {
pline("You feel very disoriented for a moment.");
} else {
if (!Blind) pline("You are surrounded by a shimmering sphere!");
else pline("You feel weightless for a moment.");
goto_level(&newlev, FALSE, FALSE, FALSE);
}
break;
}
case ENLIGHTENING:
enlightenment(0);
break;
case CREATE_AMMO: {
struct obj *otmp = mksobj(level, ARROW, TRUE, FALSE);
if (!otmp) goto nothing_special;
otmp->blessed = obj->blessed;
otmp->cursed = obj->cursed;
otmp->bknown = obj->bknown;
if (obj->blessed) {
if (otmp->spe < 0) otmp->spe = 0;
otmp->quan += rnd(10);
} else if (obj->cursed) {
if (otmp->spe > 0) otmp->spe = 0;
} else
otmp->quan += rnd(5);
otmp->owt = weight(otmp);
hold_another_object(otmp, "Suddenly %s out.", aobjnam(otmp, "fall"), NULL);
break;
}
}
} else {
long eprop = (u.uprops[oart->inv_prop].extrinsic ^= W_ARTI),
iprop = u.uprops[oart->inv_prop].intrinsic;
boolean on = (eprop & W_ARTI) != 0; /* true if invoked prop just set */
if (on && obj->age > moves) {
/* the artifact is tired :-) */
u.uprops[oart->inv_prop].extrinsic ^= W_ARTI;
pline("You feel that %s %s ignoring you.",
the(xname(obj)), otense(obj, "are"));
/* can't just keep repeatedly trying */
obj->age += (long) dice(3,10);
return 1;
} else if (!on) {
/* when turning off property, determine downtime */
/* arbitrary for now until we can tune this -dlc */
obj->age = moves + rnz(100);
}
if ((eprop & ~W_ARTI) || iprop) {
nothing_special:
/* you had the property from some other source too */
if (carried(obj))
pline("You feel a surge of power, but nothing seems to happen.");
return 1;
}
switch(oart->inv_prop) {
case CONFLICT:
if (on) pline("You feel like a rabble-rouser.");
else pline("You feel the tension decrease around you.");
break;
case LEVITATION:
if (on) {
float_up();
spoteffects(FALSE);
} else float_down(I_SPECIAL|TIMEOUT, W_ARTI);
break;
case INVIS:
if (BInvis || Blind) goto nothing_special;
newsym(u.ux, u.uy);
if (on)
pline("Your body takes on a %s transparency...",
Hallucination ? "normal" : "strange");
else
pline("Your body seems to unfade...");
break;
}
}
return 1;
}
int
spelleffects(int spell, boolean atme, const struct nh_cmd_arg *arg)
{
int energy, damage, chance, n, intell;
int skill, role_skill;
boolean confused = (Confusion != 0);
struct obj *pseudo;
boolean dummy;
coord cc;
schar dx = 0, dy = 0, dz = 0;
if (!SPELL_IS_FROM_SPELLBOOK(spell)) {
/* At the moment, we implement this via calling the code for the
shortcut command. Eventually, it would make sense to invert this
(and make the shortcut commands wrappers for spelleffects). */
switch (spellid(spell)) {
case SPID_PRAY:
return dopray(arg);
case SPID_TURN:
return doturn(arg);
case SPID_RLOC:
return dotele(arg);
case SPID_JUMP:
return dojump(arg);
case SPID_MONS:
return domonability(arg);
default:
impossible("Unknown spell number %d?", spellid(spell));
return 0;
}
}
/*
* Find the skill the hero has in a spell type category.
* See spell_skilltype for categories.
*/
skill = spell_skilltype(spellid(spell));
role_skill = P_SKILL(skill);
/* Get the direction or target, if applicable.
We want to do this *before* determining spell success, both for interface
consistency and to cut down on needless mksobj calls. */
switch (spellid(spell)) {
/* These spells ask the user to target a specific space. */
case SPE_CONE_OF_COLD:
case SPE_FIREBALL:
/* If Skilled or better, get a specific space. */
if (role_skill >= P_SKILLED) {
if (throwspell(&dx, &dy, arg)) {
dz = 0;
break;
}
else {
/* Decided not to target anything. Abort the spell. */
pline("Spell canceled.");
return 0;
}
}
/* If not Skilled, fall through. */
/* These spells ask the user to target a direction. */
case SPE_FORCE_BOLT:
case SPE_SLEEP:
case SPE_MAGIC_MISSILE:
case SPE_KNOCK:
case SPE_SLOW_MONSTER:
case SPE_WIZARD_LOCK:
case SPE_DIG:
case SPE_TURN_UNDEAD:
case SPE_POLYMORPH:
case SPE_TELEPORT_AWAY:
case SPE_CANCELLATION:
case SPE_FINGER_OF_DEATH:
case SPE_HEALING:
case SPE_EXTRA_HEALING:
case SPE_DRAIN_LIFE:
case SPE_STONE_TO_FLESH:
if (atme)
dx = dy = dz = 0;
else if (!getargdir(arg, NULL, &dx, &dy, &dz)) {
/* getdir cancelled, abort */
pline("Spell canceled.");
return 0;
}
break;
case SPE_JUMPING:
if(!get_jump_coords(arg, &cc, max(role_skill, 1))) {
/* No jumping after all, I guess. */
pline("Spell canceled.");
return 0;
}
break;
/* The rest of the spells don't have targeting. */
default:
break;
}
/* Spell casting no longer affects knowledge of the spell. A decrement of
spell knowledge is done every turn. */
if (spellknow(spell) <= 0) {
pline("Your knowledge of this spell is twisted.");
pline("It invokes nightmarish images in your mind...");
spell_backfire(spell);
return 0;
} else if (spellknow(spell) <= 200) { /* 1% */
pline("You strain to recall the spell.");
} else if (spellknow(spell) <= 1000) { /* 5% */
pline("Your knowledge of this spell is growing faint.");
}
energy = (spellev(spell) * 5); /* 5 <= energy <= 35 */
if (u.uhunger <= 10 && spellid(spell) != SPE_DETECT_FOOD) {
pline("You are too hungry to cast that spell.");
return 0;
} else if (ACURR(A_STR) < 4) {
pline("You lack the strength to cast spells.");
return 0;
} else
if (check_capacity
("Your concentration falters while carrying so much stuff.")) {
return 1;
} else if (!freehand()) {
pline("Your arms are not free to cast!");
return 0;
}
if (Uhave_amulet) {
pline("You feel the amulet draining your energy away.");
energy += rnd(2 * energy);
}
if (energy > u.uen) {
pline("You don't have enough energy to cast that spell.");
return 0;
} else {
if (spellid(spell) != SPE_DETECT_FOOD) {
int hungr = energy * 2;
/*
* If hero is a wizard, their current intelligence
* (bonuses + temporary + current)
* affects hunger reduction in casting a spell.
* 1. int = 17-18 no reduction
* 2. int = 16 1/4 hungr
* 3. int = 15 1/2 hungr
* 4. int = 1-14 normal reduction
* The reason for this is:
* a) Intelligence affects the amount of exertion
* in thinking.
* b) Wizards have spent their life at magic and
* understand quite well how to cast spells.
*/
intell = acurr(A_INT);
if (!Role_if(PM_WIZARD))
intell = 10;
if (intell >= 17)
hungr = 0;
else if (intell == 16)
hungr /= 4;
else if (intell == 15)
hungr /= 2;
/* don't put player (quite) into fainting from casting a spell,
particularly since they might not even be hungry at the
beginning; however, this is low enough that they must eat before
casting anything else except detect food */
if (hungr > u.uhunger - 3)
hungr = u.uhunger - 3;
morehungry(hungr);
}
}
chance = percent_success(spell);
if (confused || (rnd(100) > chance)) {
pline("You fail to cast the spell correctly.");
u.uen -= energy / 2;
return 1;
}
u.uen -= energy;
/* pseudo is a temporary "false" object containing the spell stats */
pseudo = mktemp_sobj(level, spellid(spell));
pseudo->blessed = pseudo->cursed = 0;
pseudo->quan = 20L; /* do not let useup get it */
switch (pseudo->otyp) {
/*
* At first spells act as expected. As the hero increases in skill
* with the appropriate spell type, some spells increase in their
* effects, e.g. more damage, further distance, and so on, without
* additional cost to the spellcaster.
*/
case SPE_CONE_OF_COLD:
case SPE_FIREBALL:
if (role_skill >= P_SKILLED) {
cc.x = dx;
cc.y = dy;
n = rnd(8) + 1;
while (n--) {
if (!dx && !dy && !dz) {
if ((damage = zapyourself(pseudo, TRUE)) != 0)
losehp(damage, msgprintf(
"zapped %sself with an exploding spell",
uhim()));
} else {
explode(dx, dy, pseudo->otyp - SPE_MAGIC_MISSILE + 10,
u.ulevel / 2 + 1 + spell_damage_bonus(), 0,
(pseudo->otyp ==
SPE_CONE_OF_COLD) ? EXPL_FROSTY : EXPL_FIERY,
NULL, 0);
}
dx = cc.x + rnd(3) - 2;
dy = cc.y + rnd(3) - 2;
if (!isok(dx, dy) || !cansee(dx, dy) ||
IS_STWALL(level->locations[dx][dy].typ) || Engulfed) {
/* Spell is reflected back to center */
dx = cc.x;
dy = cc.y;
}
}
break;
}
/* else fall through... */
/* these spells are all duplicates of wand effects */
case SPE_FORCE_BOLT:
case SPE_SLEEP:
case SPE_MAGIC_MISSILE:
case SPE_KNOCK:
case SPE_SLOW_MONSTER:
case SPE_WIZARD_LOCK:
case SPE_DIG:
case SPE_TURN_UNDEAD:
case SPE_POLYMORPH:
case SPE_TELEPORT_AWAY:
case SPE_CANCELLATION:
case SPE_FINGER_OF_DEATH:
case SPE_LIGHT:
case SPE_DETECT_UNSEEN:
case SPE_HEALING:
case SPE_EXTRA_HEALING:
case SPE_DRAIN_LIFE:
case SPE_STONE_TO_FLESH:
if (objects[pseudo->otyp].oc_dir != NODIR) {
if (!dx && !dy && !dz) {
if ((damage = zapyourself(pseudo, TRUE)) != 0) {
losehp(damage, msgprintf("zapped %sself with a spell",
uhim()));
}
} else
weffects(pseudo, dx, dy, dz);
} else
weffects(pseudo, 0, 0, 0);
update_inventory(); /* spell may modify inventory */
break;
/* these are all duplicates of scroll effects */
case SPE_REMOVE_CURSE:
case SPE_CONFUSE_MONSTER:
case SPE_DETECT_FOOD:
case SPE_CAUSE_FEAR:
/* high skill yields effect equivalent to blessed scroll */
if (role_skill >= P_SKILLED)
pseudo->blessed = 1;
/* fall through */
case SPE_CHARM_MONSTER:
case SPE_MAGIC_MAPPING:
case SPE_CREATE_MONSTER:
case SPE_IDENTIFY:
seffects(pseudo, &dummy);
break;
/* these are all duplicates of potion effects */
case SPE_HASTE_SELF:
case SPE_DETECT_TREASURE:
case SPE_DETECT_MONSTERS:
case SPE_LEVITATION:
case SPE_RESTORE_ABILITY:
/* high skill yields effect equivalent to blessed potion */
if (role_skill >= P_SKILLED)
pseudo->blessed = 1;
/* fall through */
case SPE_INVISIBILITY:
peffects(pseudo);
break;
case SPE_CURE_BLINDNESS:
healup(0, 0, FALSE, TRUE);
break;
case SPE_CURE_SICKNESS:
if (Sick)
pline("You are no longer ill.");
if (Slimed) {
pline("The slime disappears!");
Slimed = 0;
}
healup(0, 0, TRUE, FALSE);
break;
case SPE_CREATE_FAMILIAR:
make_familiar(NULL, u.ux, u.uy, FALSE);
break;
case SPE_CLAIRVOYANCE:
if (!BClairvoyant)
do_vicinity_map();
/* at present, only one thing blocks clairvoyance */
else if (uarmh && uarmh->otyp == CORNUTHAUM)
pline("You sense a pointy hat on top of your %s.", body_part(HEAD));
break;
case SPE_PROTECTION:
cast_protection();
break;
case SPE_JUMPING:
jump_to_coords(&cc);
break;
default:
impossible("Unknown spell %d attempted.", spell);
obfree(pseudo, NULL);
return 0;
}
/* gain skill for successful cast */
use_skill(skill, spellev(spell));
obfree(pseudo, NULL); /* now, get rid of it */
return 1;
}
int
doread() {
register struct obj *scroll;
register boolean confused = (Confusion != 0);
known = FALSE;
scroll = getobj(readable, "read"); /* "#-" added by GAN 10/22/86 */
if(!scroll) return(0);
/* below added to allow reading of fortune cookies */
if(scroll->otyp == FORTUNE_COOKIE) {
if(flags.verbose)
You("break up the cookie and throw away the pieces.");
outrumor(bcsign(scroll), TRUE);
useup(scroll);
return(1);
} else
if(scroll->olet != SCROLL_SYM
#ifdef SPELLS
&& scroll->olet != SPBOOK_SYM
#endif
) {
pline("That is a silly thing to read.");
return(0);
}
if(Blind) {
#ifdef SPELLS
if (scroll->olet == SPBOOK_SYM) {
pline("Being blind, you cannot read the mystic runes.");
return(0);
} else
#endif
if (!scroll->dknown) {
pline("Being blind, you cannot read the formula on the scroll.");
return(0);
}
}
#ifndef NO_SIGNAL
scroll->in_use = TRUE; /* now being read */
#endif
#ifdef SPELLS
if(scroll->olet == SPBOOK_SYM) {
if(confused) {
You("cannot grasp the meaning of this tome.");
useup(scroll);
return(0);
} else
return(study_book(scroll));
}
#endif
if(scroll->otyp != SCR_BLANK_PAPER) {
if(Blind)
pline("As you pronounce the formula on it, the scroll disappears.");
else
pline("As you read the scroll, it disappears.");
if(confused) {
if (Hallucination)
pline("Being so trippy, you screw up...");
else
pline("Being confused, you mispronounce the magic words...");
}
}
if(!seffects(scroll)) {
if(!objects[scroll->otyp].oc_name_known) {
if(known && !confused) {
makeknown(scroll->otyp);
more_experienced(0,10);
} else if(!objects[scroll->otyp].oc_uname)
docall(scroll);
}
if(!(scroll->otyp == SCR_BLANK_PAPER) || confused)
useup(scroll);
#ifndef NO_SIGNAL
else scroll->in_use = FALSE;
#endif
}
return(1);
}