src/exper.c

   1 /* NetHack 3.6  exper.c $NHDT-Date: 1446975467 2015/11/08 09:37:47 $  $NHDT-Branch: master $:$NHDT-Revision: 1.26 $ */
   2 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
   3 /* NetHack may be freely redistributed.  See license for details. */
   4
   5 #include "hack.h"
   6 #include <limits.h>
   7
   8 STATIC_DCL long FDECL(newuexp, (int));
   9 STATIC_DCL int FDECL(enermod, (int));
  10
  11 STATIC_OVL long
  12 newuexp(lev)
  13 int lev;
  14 {
  15     if (lev < 10)
  16         return (10L * (1L << lev));
  17     if (lev < 20)
  18         return (10000L * (1L << (lev - 10)));
  19     return (10000000L * ((long) (lev - 19)));
  20 }
  21
  22 STATIC_OVL int
  23 enermod(en)
  24 int en;
  25 {
  26     switch (Role_switch) {
  27     case PM_PRIEST:
  28     case PM_WIZARD:
  29         return (2 * en);
  30     case PM_HEALER:
  31     case PM_KNIGHT:
  32         return ((3 * en) / 2);
  33     case PM_BARBARIAN:
  34     case PM_VALKYRIE:
  35         return ((3 * en) / 4);
  36     default:
  37         return en;
  38     }
  39 }
  40
  41 /* calculate spell power/energy points for new level */
  42 int
  43 newpw()
  44 {
  45     int en = 0, enrnd, enfix;
  46
  47     if (u.ulevel == 0) {
  48         en = urole.enadv.infix + urace.enadv.infix;
  49         if (urole.enadv.inrnd > 0)
  50             en += rnd(urole.enadv.inrnd);
  51         if (urace.enadv.inrnd > 0)
  52             en += rnd(urace.enadv.inrnd);
  53     } else {
  54         enrnd = (int) ACURR(A_WIS) / 2;
  55         if (u.ulevel < urole.xlev) {
  56             enrnd += urole.enadv.lornd + urace.enadv.lornd;
  57             enfix = urole.enadv.lofix + urace.enadv.lofix;
  58         } else {
  59             enrnd += urole.enadv.hirnd + urace.enadv.hirnd;
  60             enfix = urole.enadv.hifix + urace.enadv.hifix;
  61         }
  62         en = enermod(rn1(enrnd, enfix));
  63     }
  64     if (en <= 0)
  65         en = 1;
  66     if (u.ulevel < MAXULEV)
  67         u.ueninc[u.ulevel] = (xchar) en;
  68     return en;
  69 }
  70
  71 /* return # of exp points for mtmp after nk killed */
  72 int
  73 experience(mtmp, nk)
  74 register struct monst *mtmp;
  75 register int nk;
  76 {
  77     register struct permonst *ptr = mtmp->data;
  78     int i, tmp, tmp2;
  79
  80     tmp = 1 + mtmp->m_lev * mtmp->m_lev;
  81
  82     /*  For higher ac values, give extra experience */
  83     if ((i = find_mac(mtmp)) < 3)
  84         tmp += (7 - i) * ((i < 0) ? 2 : 1);
  85
  86     /*  For very fast monsters, give extra experience */
  87     if (ptr->mmove > NORMAL_SPEED)
  88         tmp += (ptr->mmove > (3 * NORMAL_SPEED / 2)) ? 5 : 3;
  89
  90     /*  For each "special" attack type give extra experience */
  91     for (i = 0; i < NATTK; i++) {
  92         tmp2 = ptr->mattk[i].aatyp;
  93         if (tmp2 > AT_BUTT) {
  94             if (tmp2 == AT_WEAP)
  95                 tmp += 5;
  96             else if (tmp2 == AT_MAGC)
  97                 tmp += 10;
  98             else
  99                 tmp += 3;
 100         }
 101     }
 102
 103     /*  For each "special" damage type give extra experience */
 104     for (i = 0; i < NATTK; i++) {
 105         tmp2 = ptr->mattk[i].adtyp;
 106         if (tmp2 > AD_PHYS && tmp2 < AD_BLND)
 107             tmp += 2 * mtmp->m_lev;
 108         else if ((tmp2 == AD_DRLI) || (tmp2 == AD_STON) || (tmp2 == AD_SLIM))
 109             tmp += 50;
 110         else if (tmp2 != AD_PHYS)
 111             tmp += mtmp->m_lev;
 112         /* extra heavy damage bonus */
 113         if ((int) (ptr->mattk[i].damd * ptr->mattk[i].damn) > 23)
 114             tmp += mtmp->m_lev;
 115         if (tmp2 == AD_WRAP && ptr->mlet == S_EEL && !Amphibious)
 116             tmp += 1000;
 117     }
 118
 119     /*  For certain "extra nasty" monsters, give even more */
 120     if (extra_nasty(ptr))
 121         tmp += (7 * mtmp->m_lev);
 122
 123     /*  For higher level monsters, an additional bonus is given */
 124     if (mtmp->m_lev > 8)
 125         tmp += 50;
 126
 127 #ifdef MAIL
 128     /* Mail daemons put up no fight. */
 129     if (mtmp->data == &mons[PM_MAIL_DAEMON])
 130         tmp = 1;
 131 #endif
 132
 133     if (mtmp->mrevived || mtmp->mcloned) {
 134         /*
 135          *      Reduce experience awarded for repeated killings of
 136          *      "the same monster".  Kill count includes all of this
 137          *      monster's type which have been killed--including the
 138          *      current monster--regardless of how they were created.
 139          *        1.. 20        full experience
 140          *       21.. 40        xp / 2
 141          *       41.. 80        xp / 4
 142          *       81..120        xp / 8
 143          *      121..180        xp / 16
 144          *      181..240        xp / 32
 145          *      241..255+       xp / 64
 146          */
 147         for (i = 0, tmp2 = 20; nk > tmp2 && tmp > 1; ++i) {
 148             tmp = (tmp + 1) / 2;
 149             nk -= tmp2;
 150             if (i & 1)
 151                 tmp2 += 20;
 152         }
 153     }
 154
 155     return (tmp);
 156 }
 157
 158 void
 159 more_experienced(exper, rexp)
 160 register int exper, rexp;
 161 {
 162     long newexp = u.uexp + exper;
 163     long rexpincr = 4 * exper + rexp;
 164     long newrexp = u.urexp + rexpincr;
 165
 166     /* cap experience and score on wraparound */
 167     if (newexp < 0 && exper > 0)
 168         newexp = LONG_MAX;
 169     if (newrexp < 0 && rexpincr > 0)
 170         newrexp = LONG_MAX;
 171     u.uexp = newexp;
 172     u.urexp = newrexp;
 173
 174     if (exper
 175 #ifdef SCORE_ON_BOTL
 176         || flags.showscore
 177 #endif
 178         )
 179         context.botl = 1;
 180     if (u.urexp >= (Role_if(PM_WIZARD) ? 1000 : 2000))
 181         flags.beginner = 0;
 182 }
 183
 184 /* e.g., hit by drain life attack */
 185 void
 186 losexp(drainer)
 187 const char *drainer; /* cause of death, if drain should be fatal */
 188 {
 189     register int num;
 190
 191     /* override life-drain resistance when handling an explicit
 192        wizard mode request to reduce level; never fatal though */
 193     if (drainer && !strcmp(drainer, "#levelchange"))
 194         drainer = 0;
 195     else if (resists_drli(&youmonst))
 196         return;
 197
 198     if (u.ulevel > 1) {
 199         pline("%s level %d.", Goodbye(), u.ulevel--);
 200         /* remove intrinsic abilities */
 201         adjabil(u.ulevel + 1, u.ulevel);
 202         reset_rndmonst(NON_PM); /* new monster selection */
 203     } else {
 204         if (drainer) {
 205             killer.format = KILLED_BY;
 206             if (killer.name != drainer)
 207                 Strcpy(killer.name, drainer);
 208             done(DIED);
 209         }
 210         /* no drainer or lifesaved */
 211         u.uexp = 0;
 212     }
 213     num = (int) u.uhpinc[u.ulevel];
 214     u.uhpmax -= num;
 215     if (u.uhpmax < 1)
 216         u.uhpmax = 1;
 217     u.uhp -= num;
 218     if (u.uhp < 1)
 219         u.uhp = 1;
 220     else if (u.uhp > u.uhpmax)
 221         u.uhp = u.uhpmax;
 222
 223     num = (int) u.ueninc[u.ulevel];
 224     u.uenmax -= num;
 225     if (u.uenmax < 0)
 226         u.uenmax = 0;
 227     u.uen -= num;
 228     if (u.uen < 0)
 229         u.uen = 0;
 230     else if (u.uen > u.uenmax)
 231         u.uen = u.uenmax;
 232
 233     if (u.uexp > 0)
 234         u.uexp = newuexp(u.ulevel) - 1;
 235
 236     if (Upolyd) {
 237         num = monhp_per_lvl(&youmonst);
 238         u.mhmax -= num;
 239         u.mh -= num;
 240         if (u.mh <= 0)
 241             rehumanize();
 242     }
 243
 244     context.botl = 1;
 245 }
 246
 247 /*
 248  * Make experience gaining similar to AD&D(tm), whereby you can at most go
 249  * up by one level at a time, extra expr possibly helping you along.
 250  * After all, how much real experience does one get shooting a wand of death
 251  * at a dragon created with a wand of polymorph??
 252  */
 253 void
 254 newexplevel()
 255 {
 256     if (u.ulevel < MAXULEV && u.uexp >= newuexp(u.ulevel))
 257         pluslvl(TRUE);
 258 }
 259
 260 void
 261 pluslvl(incr)
 262 boolean incr; /* true iff via incremental experience growth */
 263 {             /*        (false for potion of gain level)    */
 264     int hpinc, eninc;
 265
 266     if (!incr)
 267         You_feel("more experienced.");
 268
 269     /* increase hit points (when polymorphed, do monster form first
 270        in order to retain normal human/whatever increase for later) */
 271     if (Upolyd) {
 272         hpinc = monhp_per_lvl(&youmonst);
 273         u.mhmax += hpinc;
 274         u.mh += hpinc;
 275     }
 276     hpinc = newhp();
 277     u.uhpmax += hpinc;
 278     u.uhp += hpinc;
 279
 280     /* increase spell power/energy points */
 281     eninc = newpw();
 282     u.uenmax += eninc;
 283     u.uen += eninc;
 284
 285     /* increase level (unless already maxxed) */
 286     if (u.ulevel < MAXULEV) {
 287         /* increase experience points to reflect new level */
 288         if (incr) {
 289             long tmp = newuexp(u.ulevel + 1);
 290             if (u.uexp >= tmp)
 291                 u.uexp = tmp - 1;
 292         } else {
 293             u.uexp = newuexp(u.ulevel);
 294         }
 295         ++u.ulevel;
 296         if (u.ulevelmax < u.ulevel)
 297             u.ulevelmax = u.ulevel;
 298         pline("Welcome to experience level %d.", u.ulevel);
 299         adjabil(u.ulevel - 1, u.ulevel); /* give new intrinsics */
 300         reset_rndmonst(NON_PM);          /* new monster selection */
 301     }
 302     context.botl = 1;
 303 }
 304
 305 /* compute a random amount of experience points suitable for the hero's
 306    experience level:  base number of points needed to reach the current
 307    level plus a random portion of what it takes to get to the next level */
 308 long
 309 rndexp(gaining)
 310 boolean gaining; /* gaining XP via potion vs setting XP for polyself */
 311 {
 312     long minexp, maxexp, diff, factor, result;
 313
 314     minexp = (u.ulevel == 1) ? 0L : newuexp(u.ulevel - 1);
 315     maxexp = newuexp(u.ulevel);
 316     diff = maxexp - minexp, factor = 1L;
 317     /* make sure that `diff' is an argument which rn2() can handle */
 318     while (diff >= (long) LARGEST_INT)
 319         diff /= 2L, factor *= 2L;
 320     result = minexp + factor * (long) rn2((int) diff);
 321     /* 3.4.1:  if already at level 30, add to current experience
 322        points rather than to threshold needed to reach the current
 323        level; otherwise blessed potions of gain level can result
 324        in lowering the experience points instead of raising them */
 325     if (u.ulevel == MAXULEV && gaining) {
 326         result += (u.uexp - minexp);
 327         /* avoid wrapping (over 400 blessed potions needed for that...) */
 328         if (result < u.uexp)
 329             result = u.uexp;
 330     }
 331     return result;
 332 }
 333
 334 /*exper.c*/