/*
* Is (x,y) a good position of mtmp? If mtmp is NULL, then is (x,y) good
* for an object?
*
* This function will only look at mtmp->mdat, so makemon, mplayer, etc can
* call it to generate new monster positions with fake monster structures.
*/
boolean goodpos(struct level *lev, int x, int y, struct monst *mtmp, unsigned gpflags)
{
const struct permonst *mdat = NULL;
boolean ignorewater = ((gpflags & MM_IGNOREWATER) != 0);
if (!isok(x, y)) return FALSE;
/* in many cases, we're trying to create a new monster, which
* can't go on top of the player or any existing monster.
* however, occasionally we are relocating engravings or objects,
* which could be co-located and thus get restricted a bit too much.
* oh well.
*/
if (mtmp != &youmonst && x == u.ux && y == u.uy
&& (!u.usteed || mtmp != u.usteed))
return FALSE;
if (mtmp) {
struct monst *mtmp2 = m_at(lev, x,y);
/* Be careful with long worms. A monster may be placed back in
* its own location. Normally, if m_at() returns the same monster
* that we're trying to place, the monster is being placed in its
* own location. However, that is not correct for worm segments,
* because all the segments of the worm return the same m_at().
* Actually we overdo the check a little bit--a worm can't be placed
* in its own location, period. If we just checked for mtmp->mx
* != x || mtmp->my != y, we'd miss the case where we're called
* to place the worm segment and the worm's head is at x,y.
*/
if (mtmp2 && (mtmp2 != mtmp || mtmp->wormno))
return FALSE;
mdat = mtmp->data;
if (is_pool(lev, x,y) && !ignorewater) {
if (mtmp == &youmonst)
return !!(HLevitation || Flying || Wwalking ||
Swimming || Amphibious);
else return (is_flyer(mdat) || is_swimmer(mdat) ||
is_clinger(mdat));
} else if (mdat->mlet == S_EEL && rn2(13) && !ignorewater) {
return FALSE;
} else if (is_lava(lev, x,y)) {
if (mtmp == &youmonst)
return !!HLevitation;
else
return is_flyer(mdat) || likes_lava(mdat);
}
if (passes_walls(mdat) && may_passwall(lev, x,y)) return TRUE;
}
if (!ACCESSIBLE(lev->locations[x][y].typ)) {
if (!(is_pool(lev, x,y) && ignorewater)) return FALSE;
}
if (closed_door(lev, x, y) && (!mdat || !amorphous(mdat)))
return FALSE;
if (sobj_at(BOULDER, lev, x, y) && (!mdat || !throws_rocks(mdat)))
return FALSE;
return TRUE;
}
/* Can we ride this monster? Caller should also check can_saddle() */
boolean
can_ride(struct monst * mtmp)
{
return (mtmp->mtame && humanoid(youmonst.data) && !verysmall(youmonst.data)
&& !bigmonst(youmonst.data) && (!Underwater ||
is_swimmer(mtmp->data)));
}
/*
* Simple-minded "can it be here?" routine
*/
static boolean e_survives_at(struct entity *etmp, int x, int y)
{
if (noncorporeal(etmp->edata))
return TRUE;
if (is_pool(level, x, y))
return (boolean)((is_u(etmp) &&
(Wwalking || Amphibious || Swimming ||
Flying || Levitation)) ||
is_swimmer(etmp->edata) || is_flyer(etmp->edata) ||
is_floater(etmp->edata));
/* must force call to lava_effects in e_died if is_u */
if (is_lava(level, x, y))
return (boolean)((is_u(etmp) && (Levitation || Flying)) ||
likes_lava(etmp->edata) || is_flyer(etmp->edata));
if (is_db_wall(x, y))
return((boolean)(is_u(etmp) ? Passes_walls :
passes_walls(etmp->edata)));
return TRUE;
}
/* Returns an object slot mask giving all the reasons why the given
player/monster might have the given property, limited by "reasons", an object
slot mask (W_EQUIP, INTRINSIC, and ANY_PROPERTY are the most likely values
here, but you can specify slots individually if you like). */
unsigned
m_has_property(const struct monst *mon, enum youprop property,
unsigned reasons, boolean even_if_blocked)
{
unsigned rv = 0;
struct obj *otmp;
/* The general case for equipment */
rv |= mworn_extrinsic(mon, property);
if (mon == &youmonst) {
/* Intrinsics */
if (u.uintrinsic[property] & TIMEOUT)
rv |= W_MASK(os_timeout);
rv |= u.uintrinsic[property] & (INTRINSIC | I_SPECIAL);
/* Birth options */
if (property == BLINDED && flags.permablind)
rv |= W_MASK(os_birthopt);
if (property == HALLUC && flags.permahallu)
rv |= W_MASK(os_birthopt);
if (property == UNCHANGING && flags.polyinit_mnum != -1)
rv |= W_MASK(os_birthopt);
} else {
/* Monster tempraries are boolean flags.
TODO: Monsters with no eyes are not considered blind. This doesn't
make much sense. However, changing it would be a major balance
change (due to Elbereth), and so it has been left alone for now. */
if (property == BLINDED && (!mon->mcansee || mon->mblinded))
rv |= W_MASK(os_timeout);
if (property == FAST && mon->mspeed == MFAST)
rv |= (mon->permspeed == FAST ?
W_MASK(os_polyform) : W_MASK(os_outside));
if (property == INVIS && mon->perminvis && !pm_invisible(mon->data))
rv |= W_MASK(os_outside);
if (property == STUNNED && mon->mstun)
rv |= W_MASK(os_timeout);
if (property == CONFUSION && mon->mconf)
rv |= W_MASK(os_timeout);
}
/* Polyform / monster intrinsic */
/* TODO: Change the monster data code into something that doesn't require a
giant switch statement or ternary chain to get useful information from
it. We use a ternary chain here because it cuts down on repetitive code
and so is easier to read. */
if (property == FIRE_RES ? resists_fire(mon) :
property == COLD_RES ? resists_cold(mon) :
property == SLEEP_RES ? resists_sleep(mon) :
property == DISINT_RES ? resists_disint(mon) :
property == SHOCK_RES ? resists_elec(mon) :
property == POISON_RES ? resists_poison(mon) :
property == DRAIN_RES ? resists_drli(mon) :
property == SICK_RES ? mon->data->mlet == S_FUNGUS ||
mon->data == &mons[PM_GHOUL] :
property == ANTIMAGIC ? resists_magm(mon) :
property == ACID_RES ? resists_acid(mon) :
property == STONE_RES ? resists_ston(mon) :
property == STUNNED ? u.umonnum == PM_STALKER ||
mon->data->mlet == S_BAT :
property == BLINDED ? !haseyes(mon->data) :
property == HALLUC ? Upolyd && dmgtype(mon->data, AD_HALU) :
property == SEE_INVIS ? perceives(mon->data) :
property == TELEPAT ? telepathic(mon->data) :
property == INFRAVISION ? infravision(mon->data) :
/* Note: This one assumes that there's no way to permanently turn
visible when you're in stalker form (i.e. mummy wrappings only). */
property == INVIS ? pm_invisible(mon->data) :
property == TELEPORT ? can_teleport(mon->data) :
property == LEVITATION ? is_floater(mon->data) :
property == FLYING ? is_flyer(mon->data) :
property == SWIMMING ? is_swimmer(mon->data) :
property == PASSES_WALLS ? passes_walls(mon->data) :
property == REGENERATION ? regenerates(mon->data) :
property == REFLECTING ? mon->data == &mons[PM_SILVER_DRAGON] :
property == TELEPORT_CONTROL ? control_teleport(mon->data) :
property == MAGICAL_BREATHING ? amphibious(mon->data) :
0)
rv |= W_MASK(os_polyform);
if (mon == &youmonst) {
/* External circumstances */
if (property == BLINDED && u_helpless(hm_unconscious))
rv |= W_MASK(os_circumstance);
/* Riding */
if (property == FLYING && u.usteed && is_flyer(u.usteed->data))
rv |= W_MASK(os_saddle);
if (property == SWIMMING && u.usteed && is_swimmer(u.usteed->data))
rv |= W_MASK(os_saddle);
}
/* Overrides */
if (!even_if_blocked) {
if (property == BLINDED) {
for (otmp = m_minvent(mon); otmp; otmp = otmp->nobj)
if (otmp->oartifact == ART_EYES_OF_THE_OVERWORLD &&
otmp->owornmask & W_MASK(os_tool))
rv &= (unsigned)(W_MASK(os_circumstance) |
W_MASK(os_birthopt));
}
if (property == WWALKING && Is_waterlevel(m_mz(mon)))
rv &= (unsigned)(W_MASK(os_birthopt));
if (mworn_blocked(mon, property))
rv &= (unsigned)(W_MASK(os_birthopt));
}
return rv & reasons;
}
/* Stop riding the current steed */
void
dismount_steed(int reason)
{
struct monst *mtmp;
struct obj *otmp;
coord cc;
const char *verb = "fall";
boolean repair_leg_damage = TRUE;
unsigned save_utrap = u.utrap;
boolean have_spot = landing_spot(&cc, reason, 0);
mtmp = u.usteed; /* make a copy of steed pointer */
/* Sanity check */
if (!mtmp) /* Just return silently */
return;
/* Check the reason for dismounting */
otmp = which_armor(mtmp, os_saddle);
switch (reason) {
case DISMOUNT_THROWN:
verb = "are thrown";
case DISMOUNT_FELL:
pline("You %s off of %s!", verb, mon_nam(mtmp));
if (!have_spot)
have_spot = landing_spot(&cc, reason, 1);
losehp(rn1(10, 10), "killed in a riding accident");
set_wounded_legs(LEFT_SIDE, (int)LWounded_legs + rn1(5, 5));
set_wounded_legs(RIGHT_SIDE, (int)RWounded_legs + rn1(5, 5));
repair_leg_damage = FALSE;
break;
case DISMOUNT_POLY:
pline("You can no longer ride %s.", mon_nam(u.usteed));
if (!have_spot)
have_spot = landing_spot(&cc, reason, 1);
break;
case DISMOUNT_ENGULFED:
/* caller displays message */
break;
case DISMOUNT_BONES:
/* hero has just died... */
break;
case DISMOUNT_GENERIC:
/* no messages, just make it so */
break;
case DISMOUNT_BYCHOICE:
default:
if (otmp && otmp->cursed) {
pline("You can't. The saddle %s cursed.",
otmp->bknown ? "is" : "seems to be");
otmp->bknown = TRUE;
return;
}
if (!have_spot) {
pline("You can't. There isn't anywhere for you to stand.");
return;
}
if (!mtmp->mnamelth) {
pline("You've been through the dungeon on %s with no name.",
an(mtmp->data->mname));
if (Hallucination)
pline("It felt good to get out of the rain.");
} else
pline("You dismount %s.", mon_nam(mtmp));
}
/* While riding these refer to the steed's legs so after dismounting they
refer to the player's legs once again. */
if (repair_leg_damage)
LWounded_legs = RWounded_legs = 0;
/* Release the steed and saddle */
u.usteed = 0;
u.ugallop = 0L;
/* Set player and steed's position. Try moving the player first unless
we're in the midst of creating a bones file. */
if (reason == DISMOUNT_BONES) {
/* move the steed to an adjacent square */
if (enexto(&cc, level, u.ux, u.uy, mtmp->data))
rloc_to(mtmp, cc.x, cc.y);
else /* evidently no room nearby; move steed elsewhere */
rloc(mtmp, FALSE);
return;
}
if (!DEADMONSTER(mtmp)) {
place_monster(mtmp, u.ux, u.uy);
if (!Engulfed && !u.ustuck && have_spot) {
const struct permonst *mdat = mtmp->data;
/* The steed may drop into water/lava */
if (!is_flyer(mdat) && !is_floater(mdat) && !is_clinger(mdat)) {
if (is_pool(level, u.ux, u.uy)) {
if (!Underwater)
pline("%s falls into the %s!", Monnam(mtmp),
surface(u.ux, u.uy));
if (!is_swimmer(mdat) && !amphibious(mdat)) {
killed(mtmp);
adjalign(-1);
}
} else if (is_lava(level, u.ux, u.uy)) {
pline("%s is pulled into the lava!", Monnam(mtmp));
if (!likes_lava(mdat)) {
killed(mtmp);
adjalign(-1);
}
}
}
/* Steed dismounting consists of two steps: being moved to another
square, and descending to the floor. We have functions to do
each of these activities, but they're normally called
individually and include an attempt to look at or pick up the
objects on the floor: teleds() --> spoteffects() --> pickup()
float_down() --> pickup() We use this kludge to make sure there
is only one such attempt. Clearly this is not the best way to do
it. A full fix would involve having these functions not call
pickup() at all, instead calling them first and calling pickup()
afterwards. But it would take a lot of work to keep this change
from having any unforseen side effects (for instance, you would
no longer be able to walk onto a square with a hole, and
autopickup before falling into the hole). */
/* [ALI] No need to move the player if the steed died. */
if (!DEADMONSTER(mtmp)) {
/* Keep steed here, move the player to cc; teleds() clears
u.utrap */
in_steed_dismounting = TRUE;
teleds(cc.x, cc.y, TRUE);
in_steed_dismounting = FALSE;
/* Put your steed in your trap */
if (save_utrap)
mintrap(mtmp);
}
/* Couldn't... try placing the steed */
} else if (enexto(&cc, level, u.ux, u.uy, mtmp->data)) {
/* Keep player here, move the steed to cc */
rloc_to(mtmp, cc.x, cc.y);
/* Player stays put */
/* Otherwise, kill the steed */
} else {
killed(mtmp);
adjalign(-1);
}
}
/* Return the player to the floor */
if (reason != DISMOUNT_ENGULFED) {
in_steed_dismounting = TRUE;
float_down(0L);
in_steed_dismounting = FALSE;
encumber_msg();
turnstate.vision_full_recalc = TRUE;
} else
/* polearms behave differently when not mounted */
if (uwep && is_pole(uwep))
u.bashmsg = FALSE;
return;
}
/* Start riding, with the given monster */
boolean
mount_steed(struct monst * mtmp, /* The animal */
boolean force)
{ /* Quietly force this animal */
struct obj *otmp;
const struct permonst *ptr;
/* Sanity checks */
if (u.usteed) {
pline("You are already riding %s.", mon_nam(u.usteed));
return FALSE;
}
/* Is the player in the right form? */
if (Hallucination && !force) {
pline("Maybe you should find a designated driver.");
return FALSE;
}
/* While riding Wounded_legs refers to the steed's, not the hero's legs.
That opens up a potential abuse where the player can mount a steed, then
dismount immediately to heal leg damage, because leg damage is always
healed upon dismount (Wounded_legs context switch). By preventing a hero
with Wounded_legs from mounting a steed, the potential for abuse is
minimized, if not eliminated altogether. */
if (Wounded_legs) {
pline("Your %s are in no shape for riding.",
makeplural(body_part(LEG)));
if (force && wizard && yn("Heal your legs?") == 'y')
LWounded_legs = RWounded_legs = 0;
else
return FALSE;
}
if (Upolyd &&
(!humanoid(youmonst.data) || verysmall(youmonst.data) ||
bigmonst(youmonst.data) || slithy(youmonst.data))) {
pline("You won't fit on a saddle.");
return FALSE;
}
if (!force && (near_capacity() > SLT_ENCUMBER)) {
pline("You can't do that while carrying so much stuff.");
return FALSE;
}
/* Can the player reach and see the monster? */
if (!mtmp ||
(!force &&
((Blind && !Blind_telepat) || mtmp->mundetected ||
mtmp->m_ap_type == M_AP_FURNITURE ||
mtmp->m_ap_type == M_AP_OBJECT))) {
pline("I see nobody there.");
return FALSE;
}
struct test_move_cache cache;
init_test_move_cache(&cache);
if (Engulfed || u.ustuck || u.utrap || Punished ||
!test_move(u.ux, u.uy, mtmp->mx - u.ux, mtmp->my - u.uy, 0,
TEST_MOVE, &cache)) {
if (Punished || !(Engulfed || u.ustuck || u.utrap))
pline("You are unable to swing your %s over.", body_part(LEG));
else
pline("You are stuck here for now.");
return FALSE;
}
/* Is this a valid monster? */
otmp = which_armor(mtmp, os_saddle);
if (!otmp) {
pline("%s is not saddled.", Monnam(mtmp));
return FALSE;
}
ptr = mtmp->data;
if (touch_petrifies(ptr) && !Stone_resistance) {
pline("You touch %s.", mon_nam(mtmp));
instapetrify(killer_msg(STONING,
msgcat("attempting to ride ", an(mtmp->data->mname))));
}
if (!mtmp->mtame || mtmp->isminion) {
pline("I think %s would mind.", mon_nam(mtmp));
return FALSE;
}
if (mtmp->mtrapped) {
struct trap *t = t_at(level, mtmp->mx, mtmp->my);
pline("You can't mount %s while %s's trapped in %s.", mon_nam(mtmp),
mhe(mtmp), t ? an(trapexplain[t->ttyp - 1]) : "ice");
return FALSE;
}
if (!force && !Role_if(PM_KNIGHT) && !(--mtmp->mtame)) {
/* no longer tame */
newsym(mtmp->mx, mtmp->my);
pline("%s resists%s!", Monnam(mtmp),
mtmp->mleashed ? " and its leash comes off" : "");
if (mtmp->mleashed)
m_unleash(mtmp, FALSE);
return FALSE;
}
if (!force && Underwater && !is_swimmer(ptr)) {
pline("You can't ride that creature while under water.");
return FALSE;
}
if (!can_saddle(mtmp) || !can_ride(mtmp)) {
pline("You can't ride such a creature.");
return 0;
}
/* Is the player impaired? */
if (!force && !is_floater(ptr) && !is_flyer(ptr) && Levitation &&
!Lev_at_will) {
pline("You cannot reach %s.", mon_nam(mtmp));
return FALSE;
}
if (!force && uarm && is_metallic(uarm) && greatest_erosion(uarm)) {
pline("Your %s armor is too stiff to be able to mount %s.",
uarm->oeroded ? "rusty" : "corroded", mon_nam(mtmp));
return FALSE;
}
if (!force &&
(Confusion || Fumbling || Glib || Wounded_legs || otmp->cursed ||
((u.ulevel + mtmp->mtame < rnd(MAXULEV / 2 + 5)) &&
(!Role_if(PM_KNIGHT))))) {
if (Levitation) {
pline("%s slips away from you.", Monnam(mtmp));
return FALSE;
}
pline("You slip while trying to get on %s.", mon_nam(mtmp));
const char *buf = msgcat(
"slipped while mounting ",
/* "a saddled mumak" or "a saddled pony called Dobbin" */
x_monnam(mtmp, ARTICLE_A, NULL,
SUPPRESS_IT | SUPPRESS_INVISIBLE |
SUPPRESS_HALLUCINATION, TRUE));
losehp(rn1(5, 10), buf);
return FALSE;
}
/* Success */
maybewakesteed(mtmp);
if (!force) {
if (Levitation && !is_floater(ptr) && !is_flyer(ptr))
/* Must have Lev_at_will at this point */
pline("%s magically floats up!", Monnam(mtmp));
pline("You mount %s.", mon_nam(mtmp));
}
/* setuwep handles polearms differently when you're mounted */
if (uwep && is_pole(uwep))
u.bashmsg = TRUE;
u.usteed = mtmp;
remove_monster(level, mtmp->mx, mtmp->my);
teleds(mtmp->mx, mtmp->my, TRUE);
return TRUE;
}
