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  * $DragonFly: src/games/rogue/throw.c,v 1.3 2006/09/02 19:31:07 pavalos Exp $
  35  */
  36
  37 /*
  38  * throw.c
  39  *
  40  * This source herein may be modified and/or distributed by anybody who
  41  * so desires, with the following restrictions:
  42  *    1.)  No portion of this notice shall be removed.
  43  *    2.)  Credit shall not be taken for the creation of this source.
  44  *    3.)  This code is not to be traded, sold, or used for personal
  45  *         gain or profit.
  46  *
  47  */
  48
  49 #include "rogue.h"
  50
  51 extern short cur_room;
  52 extern char *curse_message;
  53 extern char hit_message[];
  54
  55 static void flop_weapon(object *, short, short);
  56 static object *get_thrown_at_monster(object *, short, short *, short *);
  57 static boolean throw_at_monster(object *, object *);
  58
  59 void
  60 throw(void)
  61 {
  62         short wch, d;
  63         boolean first_miss = 1;
  64         object *weapon;
  65         short dir, row, col;
  66         object *monster;
  67
  68         while (!is_direction(dir = rgetchar(), &d)) {
  69                 sound_bell();
  70                 if (first_miss) {
  71                         message("direction? ", 0);
  72                         first_miss = 0;
  73                 }
  74         }
  75         check_message();
  76         if (dir == CANCEL) {
  77                 return;
  78         }
  79         if ((wch = pack_letter("throw what?", WEAPON)) == CANCEL) {
  80                 return;
  81         }
  82         check_message();
  83
  84         if (!(weapon = get_letter_object(wch))) {
  85                 message("no such item.", 0);
  86                 return;
  87         }
  88         if ((weapon->in_use_flags & BEING_USED) && weapon->is_cursed) {
  89                 message(curse_message, 0);
  90                 return;
  91         }
  92         row = rogue.row; col = rogue.col;
  93
  94         if ((weapon->in_use_flags & BEING_WIELDED) && (weapon->quantity <= 1)) {
  95                 unwield(rogue.weapon);
  96         } else if (weapon->in_use_flags & BEING_WORN) {
  97                 mv_aquatars();
  98                 unwear(rogue.armor);
  99                 print_stats(STAT_ARMOR);
 100         } else if (weapon->in_use_flags & ON_EITHER_HAND) {
 101                 un_put_on(weapon);
 102         }
 103         monster = get_thrown_at_monster(weapon, d, &row, &col);
 104         mvaddch(rogue.row, rogue.col, rogue.fchar);
 105         refresh();
 106
 107         if (rogue_can_see(row, col) && ((row != rogue.row) || (col != rogue.col))) {
 108                 mvaddch(row, col, get_dungeon_char(row, col));
 109         }
 110         if (monster) {
 111                 wake_up(monster);
 112                 check_gold_seeker(monster);
 113
 114                 if (!throw_at_monster(monster, weapon)) {
 115                         flop_weapon(weapon, row, col);
 116                 }
 117         } else {
 118                 flop_weapon(weapon, row, col);
 119         }
 120         vanish(weapon, 1, &rogue.pack);
 121 }
 122
 123 static boolean
 124 throw_at_monster(object *monster, object *weapon)
 125 {
 126         short damage, hit_chance;
 127         short t;
 128
 129         hit_chance = get_hit_chance(weapon);
 130         damage = get_weapon_damage(weapon);
 131         if ((weapon->which_kind == ARROW) &&
 132                 (rogue.weapon && (rogue.weapon->which_kind == BOW))) {
 133                 damage += get_weapon_damage(rogue.weapon);
 134                 damage = ((damage * 2) / 3);
 135                 hit_chance += (hit_chance / 3);
 136         } else if ((weapon->in_use_flags & BEING_WIELDED) &&
 137                 ((weapon->which_kind == DAGGER) ||
 138                 (weapon->which_kind == SHURIKEN) ||
 139                 (weapon->which_kind == DART))) {
 140                 damage = ((damage * 3) / 2);
 141                 hit_chance += (hit_chance / 3);
 142         }
 143         t = weapon->quantity;
 144         weapon->quantity = 1;
 145         sprintf(hit_message, "the %s", name_of(weapon));
 146         weapon->quantity = t;
 147
 148         if (!rand_percent(hit_chance)) {
 149                 strcat(hit_message, "misses  ");
 150                 return(0);
 151         }
 152         s_con_mon(monster);
 153         strcat(hit_message, "hit  ");
 154         mon_damage(monster, damage);
 155         return(1);
 156 }
 157
 158 static object *
 159 get_thrown_at_monster(object *obj, short dir, short *row, short *col)
 160 {
 161         short orow, ocol;
 162         short i, ch;
 163
 164         orow = *row; ocol = *col;
 165
 166         ch = get_mask_char(obj->what_is);
 167
 168         for (i = 0; i < 24; i++) {
 169                 get_dir_rc(dir, row, col, 0);
 170                 if (    (((*col <= 0) || (*col >= DCOLS-1)) ||
 171                                 (dungeon[*row][*col] == NOTHING)) ||
 172                                 ((dungeon[*row][*col] & (HORWALL | VERTWALL | HIDDEN)) &&
 173                                         (!(dungeon[*row][*col] & TRAP)))) {
 174                         *row = orow;
 175                         *col = ocol;
 176                         return(0);
 177                 }
 178                 if ((i != 0) && rogue_can_see(orow, ocol)) {
 179                         mvaddch(orow, ocol, get_dungeon_char(orow, ocol));
 180                 }
 181                 if (rogue_can_see(*row, *col)) {
 182                         if (!(dungeon[*row][*col] & MONSTER)) {
 183                                 mvaddch(*row, *col, ch);
 184                         }
 185                         refresh();
 186                 }
 187                 orow = *row; ocol = *col;
 188                 if (dungeon[*row][*col] & MONSTER) {
 189                         if (!imitating(*row, *col)) {
 190                                 return(object_at(&level_monsters, *row, *col));
 191                         }
 192                 }
 193                 if (dungeon[*row][*col] & TUNNEL) {
 194                         i += 2;
 195                 }
 196         }
 197         return(0);
 198 }
 199
 200 static void
 201 flop_weapon(object *weapon, short row, short col)
 202 {
 203         object *new_weapon, *monster;
 204         short i = 0;
 205         char msg[80];
 206         boolean found = 0;
 207         short mch, dch;
 208         unsigned short mon;
 209
 210         while ((i < 9) && dungeon[row][col] & ~(FLOOR | TUNNEL | DOOR | MONSTER)) {
 211                 rand_around(i++, &row, &col);
 212                 if ((row > (DROWS-2)) || (row < MIN_ROW) ||
 213                         (col > (DCOLS-1)) || (col < 0) || (!dungeon[row][col]) ||
 214                         (dungeon[row][col] & ~(FLOOR | TUNNEL | DOOR | MONSTER))) {
 215                         continue;
 216                 }
 217                 found = 1;
 218                 break;
 219         }
 220
 221         if (found || (i == 0)) {
 222                 new_weapon = alloc_object();
 223                 *new_weapon = *weapon;
 224                 new_weapon->in_use_flags = NOT_USED;
 225                 new_weapon->quantity = 1;
 226                 new_weapon->ichar = 'L';
 227                 place_at(new_weapon, row, col);
 228                 if (rogue_can_see(row, col) &&
 229                                 ((row != rogue.row) || (col != rogue.col))) {
 230                         mon = dungeon[row][col] & MONSTER;
 231                         dungeon[row][col] &= (~MONSTER);
 232                         dch = get_dungeon_char(row, col);
 233                         if (mon) {
 234                                 mch = mvinch(row, col);
 235                                 if ((monster = object_at(&level_monsters,
 236                                     row, col)) != NULL) {
 237                                         monster->trail_char = dch;
 238                                 }
 239                                 if ((mch < 'A') || (mch > 'Z')) {
 240                                         mvaddch(row, col, dch);
 241                                 }
 242                         } else {
 243                                 mvaddch(row, col, dch);
 244                         }
 245                         dungeon[row][col] |= mon;
 246                 }
 247         } else {
 248                 short t;
 249
 250                 t = weapon->quantity;
 251                 weapon->quantity = 1;
 252                 sprintf(msg, "the %svanishes as it hits the ground",
 253                 name_of(weapon));
 254                 weapon->quantity = t;
 255                 message(msg, 0);
 256         }
 257 }
 258
 259 void
 260 rand_around(short i, short *r, short *c)
 261 {
 262         static char pos[] = "\010\007\001\003\004\005\002\006\0";
 263         static short row, col;
 264         short j;
 265
 266         if (i == 0) {
 267                 short x, y, o, t;
 268
 269                 row = *r;
 270                 col = *c;
 271
 272                 o = get_rand(1, 8);
 273
 274                 for (j = 0; j < 5; j++) {
 275                         x = get_rand(0, 8);
 276                         y = (x + o) % 9;
 277                         t = pos[x];
 278                         pos[x] = pos[y];
 279                         pos[y] = t;
 280                 }
 281         }
 282         switch((short)pos[i]) {
 283         case 0:
 284                 *r = row + 1;
 285                 *c = col + 1;
 286                 break;
 287         case 1:
 288                 *r = row + 1;
 289                 *c = col - 1;
 290                 break;
 291         case 2:
 292                 *r = row - 1;
 293                 *c = col + 1;
 294                 break;
 295         case 3:
 296                 *r = row - 1;
 297                 *c = col - 1;
 298                 break;
 299         case 4:
 300                 *r = row;
 301                 *c = col + 1;
 302                 break;
 303         case 5:
 304                 *r = row + 1;
 305                 *c = col;
 306                 break;
 307         case 6:
 308                 *r = row;
 309                 *c = col;
 310                 break;
 311         case 7:
 312                 *r = row - 1;
 313                 *c = col;
 314                 break;
 315         case 8:
 316                 *r = row;
 317                 *c = col - 1;
 318                 break;
 319         }
 320 }