games/rogue/throw.c

   1 /*-
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Timothy C. Stoehr.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)throw.c  8.1 (Berkeley) 5/31/93
  33  * $FreeBSD: src/games/rogue/throw.c,v 1.3 1999/11/30 03:49:28 billf Exp $
  34  */
  35
  36 /*
  37  * throw.c
  38  *
  39  * This source herein may be modified and/or distributed by anybody who
  40  * so desires, with the following restrictions:
  41  *    1.)  No portion of this notice shall be removed.
  42  *    2.)  Credit shall not be taken for the creation of this source.
  43  *    3.)  This code is not to be traded, sold, or used for personal
  44  *         gain or profit.
  45  *
  46  */
  47
  48 #include "rogue.h"
  49
  50 static void flop_weapon(object *, short, short);
  51 static object *get_thrown_at_monster(object *, short, short *, short *);
  52 static boolean throw_at_monster(object *, object *);
  53
  54 void
  55 throw(void)
  56 {
  57         short wch, d;
  58         boolean first_miss = 1;
  59         object *weapon;
  60         short dir, row, col;
  61         object *monster;
  62
  63         while (!is_direction(dir = rgetchar(), &d)) {
  64                 sound_bell();
  65                 if (first_miss) {
  66                         message("direction? ", 0);
  67                         first_miss = 0;
  68                 }
  69         }
  70         check_message();
  71         if (dir == CANCEL) {
  72                 return;
  73         }
  74         if ((wch = pack_letter("throw what?", WEAPON)) == CANCEL) {
  75                 return;
  76         }
  77         check_message();
  78
  79         if (!(weapon = get_letter_object(wch))) {
  80                 message("no such item.", 0);
  81                 return;
  82         }
  83         if ((weapon->in_use_flags & BEING_USED) && weapon->is_cursed) {
  84                 message(curse_message, 0);
  85                 return;
  86         }
  87         row = rogue.row; col = rogue.col;
  88
  89         if ((weapon->in_use_flags & BEING_WIELDED) && (weapon->quantity <= 1)) {
  90                 unwield(rogue.weapon);
  91         } else if (weapon->in_use_flags & BEING_WORN) {
  92                 mv_aquatars();
  93                 unwear(rogue.armor);
  94                 print_stats(STAT_ARMOR);
  95         } else if (weapon->in_use_flags & ON_EITHER_HAND) {
  96                 un_put_on(weapon);
  97         }
  98         monster = get_thrown_at_monster(weapon, d, &row, &col);
  99         mvaddch(rogue.row, rogue.col, rogue.fchar);
 100         refresh();
 101
 102         if (rogue_can_see(row, col) && ((row != rogue.row) || (col != rogue.col))) {
 103                 mvaddch(row, col, get_dungeon_char(row, col));
 104         }
 105         if (monster) {
 106                 wake_up(monster);
 107                 check_gold_seeker(monster);
 108
 109                 if (!throw_at_monster(monster, weapon)) {
 110                         flop_weapon(weapon, row, col);
 111                 }
 112         } else {
 113                 flop_weapon(weapon, row, col);
 114         }
 115         vanish(weapon, 1, &rogue.pack);
 116 }
 117
 118 static boolean
 119 throw_at_monster(object *monster, object *weapon)
 120 {
 121         short damage, hit_chance;
 122         short t;
 123
 124         hit_chance = get_hit_chance(weapon);
 125         damage = get_weapon_damage(weapon);
 126         if ((weapon->which_kind == ARROW) &&
 127                 (rogue.weapon && (rogue.weapon->which_kind == BOW))) {
 128                 damage += get_weapon_damage(rogue.weapon);
 129                 damage = ((damage * 2) / 3);
 130                 hit_chance += (hit_chance / 3);
 131         } else if ((weapon->in_use_flags & BEING_WIELDED) &&
 132                 ((weapon->which_kind == DAGGER) ||
 133                 (weapon->which_kind == SHURIKEN) ||
 134                 (weapon->which_kind == DART))) {
 135                 damage = ((damage * 3) / 2);
 136                 hit_chance += (hit_chance / 3);
 137         }
 138         t = weapon->quantity;
 139         weapon->quantity = 1;
 140         sprintf(hit_message, "the %s", name_of(weapon));
 141         weapon->quantity = t;
 142
 143         if (!rand_percent(hit_chance)) {
 144                 strcat(hit_message, "misses  ");
 145                 return(0);
 146         }
 147         s_con_mon(monster);
 148         strcat(hit_message, "hit  ");
 149         mon_damage(monster, damage);
 150         return(1);
 151 }
 152
 153 static object *
 154 get_thrown_at_monster(object *obj, short dir, short *row, short *col)
 155 {
 156         short orow, ocol;
 157         short i, ch;
 158
 159         orow = *row; ocol = *col;
 160
 161         ch = get_mask_char(obj->what_is);
 162
 163         for (i = 0; i < 24; i++) {
 164                 get_dir_rc(dir, row, col, 0);
 165                 if (    (((*col <= 0) || (*col >= DCOLS-1)) ||
 166                                 (dungeon[*row][*col] == NOTHING)) ||
 167                                 ((dungeon[*row][*col] & (HORWALL | VERTWALL | HIDDEN)) &&
 168                                         (!(dungeon[*row][*col] & TRAP)))) {
 169                         *row = orow;
 170                         *col = ocol;
 171                         return(0);
 172                 }
 173                 if ((i != 0) && rogue_can_see(orow, ocol)) {
 174                         mvaddch(orow, ocol, get_dungeon_char(orow, ocol));
 175                 }
 176                 if (rogue_can_see(*row, *col)) {
 177                         if (!(dungeon[*row][*col] & MONSTER)) {
 178                                 mvaddch(*row, *col, ch);
 179                         }
 180                         refresh();
 181                 }
 182                 orow = *row; ocol = *col;
 183                 if (dungeon[*row][*col] & MONSTER) {
 184                         if (!imitating(*row, *col)) {
 185                                 return(object_at(&level_monsters, *row, *col));
 186                         }
 187                 }
 188                 if (dungeon[*row][*col] & TUNNEL) {
 189                         i += 2;
 190                 }
 191         }
 192         return(0);
 193 }
 194
 195 static void
 196 flop_weapon(object *weapon, short row, short col)
 197 {
 198         object *new_weapon, *monster;
 199         short i = 0;
 200         char msg[80];
 201         boolean found = 0;
 202         short mch, dch;
 203         unsigned short mon;
 204
 205         while ((i < 9) && dungeon[row][col] & ~(FLOOR | TUNNEL | DOOR | MONSTER)) {
 206                 rand_around(i++, &row, &col);
 207                 if ((row > (DROWS-2)) || (row < MIN_ROW) ||
 208                         (col > (DCOLS-1)) || (col < 0) || (!dungeon[row][col]) ||
 209                         (dungeon[row][col] & ~(FLOOR | TUNNEL | DOOR | MONSTER))) {
 210                         continue;
 211                 }
 212                 found = 1;
 213                 break;
 214         }
 215
 216         if (found || (i == 0)) {
 217                 new_weapon = alloc_object();
 218                 *new_weapon = *weapon;
 219                 new_weapon->in_use_flags = NOT_USED;
 220                 new_weapon->quantity = 1;
 221                 new_weapon->ichar = 'L';
 222                 place_at(new_weapon, row, col);
 223                 if (rogue_can_see(row, col) &&
 224                                 ((row != rogue.row) || (col != rogue.col))) {
 225                         mon = dungeon[row][col] & MONSTER;
 226                         dungeon[row][col] &= (~MONSTER);
 227                         dch = get_dungeon_char(row, col);
 228                         if (mon) {
 229                                 mch = mvinch(row, col);
 230                                 if ((monster = object_at(&level_monsters,
 231                                     row, col)) != NULL) {
 232                                         monster->trail_char = dch;
 233                                 }
 234                                 if ((mch < 'A') || (mch > 'Z')) {
 235                                         mvaddch(row, col, dch);
 236                                 }
 237                         } else {
 238                                 mvaddch(row, col, dch);
 239                         }
 240                         dungeon[row][col] |= mon;
 241                 }
 242         } else {
 243                 short t;
 244
 245                 t = weapon->quantity;
 246                 weapon->quantity = 1;
 247                 sprintf(msg, "the %svanishes as it hits the ground",
 248                 name_of(weapon));
 249                 weapon->quantity = t;
 250                 message(msg, 0);
 251         }
 252 }
 253
 254 void
 255 rand_around(short i, short *r, short *c)
 256 {
 257         static char pos[] = "\010\007\001\003\004\005\002\006\0";
 258         static short row, col;
 259         short j;
 260
 261         if (i == 0) {
 262                 short x, y, o, t;
 263
 264                 row = *r;
 265                 col = *c;
 266
 267                 o = get_rand(1, 8);
 268
 269                 for (j = 0; j < 5; j++) {
 270                         x = get_rand(0, 8);
 271                         y = (x + o) % 9;
 272                         t = pos[x];
 273                         pos[x] = pos[y];
 274                         pos[y] = t;
 275                 }
 276         }
 277         switch((short)pos[i]) {
 278         case 0:
 279                 *r = row + 1;
 280                 *c = col + 1;
 281                 break;
 282         case 1:
 283                 *r = row + 1;
 284                 *c = col - 1;
 285                 break;
 286         case 2:
 287                 *r = row - 1;
 288                 *c = col + 1;
 289                 break;
 290         case 3:
 291                 *r = row - 1;
 292                 *c = col - 1;
 293                 break;
 294         case 4:
 295                 *r = row;
 296                 *c = col + 1;
 297                 break;
 298         case 5:
 299                 *r = row + 1;
 300                 *c = col;
 301                 break;
 302         case 6:
 303                 *r = row;
 304                 *c = col;
 305                 break;
 306         case 7:
 307                 *r = row - 1;
 308                 *c = col;
 309                 break;
 310         case 8:
 311                 *r = row;
 312                 *c = col - 1;
 313                 break;
 314         }
 315 }