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resistance checking again

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Another attempt to straighten out resistance checking....
This commit is contained in:
PatR
2025-02-04 11:06:53 -08:00
parent b44a547153
commit 3d02eb45d3
1 changed files with 35 additions and 20 deletions
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55
src/mondata.c
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@@ -123,27 +123,36 @@ defended(struct monst *mon, int adtyp)
return FALSE;
}
/* returns True if monster resists particular elemental damage; mostly used
in order to check effects of carried artifacts */
/* returns True if monster resists particular elemental damage;
handles 'carry' effects of artifacts as well as worn/wielded items */
boolean
Resists_Elem(struct monst *mon, int proptyp)
Resists_Elem(struct monst *mon, int propindx)
{
struct obj *o;
long slotmask;
boolean is_you = (mon == &gy.youmonst);
int u_resist = 0, dmgtyp = 0, restyp = 0;
int u_resist = 0, damgtype = 0, rsstmask = 0;
switch (proptyp) {
case FIRE_RES:
case COLD_RES:
case SLEEP_RES:
case DISINT_RES:
case SHOCK_RES:
case POISON_RES:
case ACID_RES:
case STONE_RES:
dmgtyp = restyp = proptyp + 1; /* valid for dmgtyp|restyp 2..9 */
u_resist = u.uprops[proptyp].intrinsic || u.uprops[proptyp].extrinsic;
/*
* Main damage/resistance types, mostly matching dragon breath values.
* propindx = property index, fire (1), cold, (2) through stone (8);
* damgtype = damage type, 2 through 9 (0 and 1 aren't used here);
* rsstmask = resistance mask, 1, 2, 4, ..., 64, 128.
*/
switch (propindx) {
case FIRE_RES: /* 1 */
case COLD_RES: /* 2 */
case SLEEP_RES: /* 3 */
case DISINT_RES: /* 4 */
case SHOCK_RES: /* 5 */
case POISON_RES: /* 6 */
case ACID_RES: /* 7 */
case STONE_RES: /* 8 */
damgtype = propindx + 1; /* valid for propindx 1..8, damgtype 2..9 */
rsstmask = 1 << (propindx - 1); /* valid for propindx 1..8 */
u_resist = u.uprops[propindx].intrinsic
|| u.uprops[propindx].extrinsic;
break;
/* accept these, but we expect callers to use their routines directly */
@@ -155,15 +164,15 @@ Resists_Elem(struct monst *mon, int proptyp)
return resists_blnd(mon);
default:
impossible("Resists_Elem(%d), unexpected property type", proptyp);
impossible("Resists_Elem(%d), unexpected property type", propindx);
return FALSE;
}
if (is_you ? u_resist : ((mon_resistancebits(mon) & restyp) != 0))
if (is_you ? u_resist : ((mon_resistancebits(mon) & rsstmask) != 0))
return TRUE;
/* check for resistance granted by wielded weapon */
o = is_you ? uwep : MON_WEP(mon);
if (o && o->oartifact && defends(dmgtyp, o))
if (o && o->oartifact && defends(damgtype, o))
return TRUE;
/* check for resistance granted by worn or carried items */
o = is_you ? gi.invent : mon->minvent;
@@ -175,8 +184,14 @@ Resists_Elem(struct monst *mon, int proptyp)
slotmask |= W_SWAPWEP;
for (; o; o = o->nobj)
if (((o->owornmask & slotmask) != 0L
&& objects[o->otyp].oc_oprop == restyp)
|| (o->oartifact && defends_when_carried(dmgtyp, o)))
&& objects[o->otyp].oc_oprop == propindx)
|| ((o->owornmask & W_ARMC) == W_ARMC
/* worn apron confers a pair of resistances but
objects[ALCHEMY_SMOCK].oc_oprop can only represent one;
we check both so won't need to know which one that is */
&& o->otyp == ALCHEMY_SMOCK
&& (propindx == POISON_RES || propindx == ACID_RES))
|| (o->oartifact && defends_when_carried(damgtype, o)))
return TRUE;
return FALSE;
}