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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)throw.c  8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/throw.c,v 1.3 1999/11/30 03:49:28 billf Exp $
  38  * $DragonFly: src/games/rogue/throw.c,v 1.3 2006/09/02 19:31:07 pavalos Exp $
  39  */
  40
  41 /*
  42  * throw.c
  43  *
  44  * This source herein may be modified and/or distributed by anybody who
  45  * so desires, with the following restrictions:
  46  *    1.)  No portion of this notice shall be removed.
  47  *    2.)  Credit shall not be taken for the creation of this source.
  48  *    3.)  This code is not to be traded, sold, or used for personal
  49  *         gain or profit.
  50  *
  51  */
  52
  53 #include "rogue.h"
  54
  55 extern short cur_room;
  56 extern char *curse_message;
  57 extern char hit_message[];
  58
  59 static boolean  throw_at_monster(object *, object *);
  60 static object   *get_thrown_at_monster(object *, short, short *, short *);
  61 static void     flop_weapon(object *, short, short);
  62
  63 void
  64 throw(void)
  65 {
  66         short wch, d;
  67         boolean first_miss = 1;
  68         object *weapon;
  69         short dir, row, col;
  70         object *monster;
  71
  72         while (!is_direction(dir = rgetchar(), &d)) {
  73                 sound_bell();
  74                 if (first_miss) {
  75                         message("direction? ", 0);
  76                         first_miss = 0;
  77                 }
  78         }
  79         check_message();
  80         if (dir == CANCEL) {
  81                 return;
  82         }
  83         if ((wch = pack_letter("throw what?", WEAPON)) == CANCEL) {
  84                 return;
  85         }
  86         check_message();
  87
  88         if (!(weapon = get_letter_object(wch))) {
  89                 message("no such item.", 0);
  90                 return;
  91         }
  92         if ((weapon->in_use_flags & BEING_USED) && weapon->is_cursed) {
  93                 message(curse_message, 0);
  94                 return;
  95         }
  96         row = rogue.row; col = rogue.col;
  97
  98         if ((weapon->in_use_flags & BEING_WIELDED) && (weapon->quantity <= 1)) {
  99                 unwield(rogue.weapon);
 100         } else if (weapon->in_use_flags & BEING_WORN) {
 101                 mv_aquatars();
 102                 unwear(rogue.armor);
 103                 print_stats(STAT_ARMOR);
 104         } else if (weapon->in_use_flags & ON_EITHER_HAND) {
 105                 un_put_on(weapon);
 106         }
 107         monster = get_thrown_at_monster(weapon, d, &row, &col);
 108         mvaddch(rogue.row, rogue.col, rogue.fchar);
 109         refresh();
 110
 111         if (rogue_can_see(row, col) && ((row != rogue.row) || (col != rogue.col))){
 112                 mvaddch(row, col, get_dungeon_char(row, col));
 113         }
 114         if (monster) {
 115                 wake_up(monster);
 116                 check_gold_seeker(monster);
 117
 118                 if (!throw_at_monster(monster, weapon)) {
 119                         flop_weapon(weapon, row, col);
 120                 }
 121         } else {
 122                 flop_weapon(weapon, row, col);
 123         }
 124         vanish(weapon, 1, &rogue.pack);
 125 }
 126
 127 static boolean
 128 throw_at_monster(object *monster, object *weapon)
 129 {
 130         short damage, hit_chance;
 131         short t;
 132
 133         hit_chance = get_hit_chance(weapon);
 134         damage = get_weapon_damage(weapon);
 135         if ((weapon->which_kind == ARROW) &&
 136                 (rogue.weapon && (rogue.weapon->which_kind == BOW))) {
 137                 damage += get_weapon_damage(rogue.weapon);
 138                 damage = ((damage * 2) / 3);
 139                 hit_chance += (hit_chance / 3);
 140         } else if ((weapon->in_use_flags & BEING_WIELDED) &&
 141                 ((weapon->which_kind == DAGGER) ||
 142                 (weapon->which_kind == SHURIKEN) ||
 143                 (weapon->which_kind == DART))) {
 144                 damage = ((damage * 3) / 2);
 145                 hit_chance += (hit_chance / 3);
 146         }
 147         t = weapon->quantity;
 148         weapon->quantity = 1;
 149         sprintf(hit_message, "the %s", name_of(weapon));
 150         weapon->quantity = t;
 151
 152         if (!rand_percent(hit_chance)) {
 153                 strcat(hit_message, "misses  ");
 154                 return(0);
 155         }
 156         s_con_mon(monster);
 157         strcat(hit_message, "hit  ");
 158         mon_damage(monster, damage);
 159         return(1);
 160 }
 161
 162 static object *
 163 get_thrown_at_monster(object *obj, short dir, short *row, short *col)
 164 {
 165         short orow, ocol;
 166         short i, ch;
 167
 168         orow = *row; ocol = *col;
 169
 170         ch = get_mask_char(obj->what_is);
 171
 172         for (i = 0; i < 24; i++) {
 173                 get_dir_rc(dir, row, col, 0);
 174                 if (    (((*col <= 0) || (*col >= DCOLS-1)) ||
 175                                 (dungeon[*row][*col] == NOTHING)) ||
 176                                 ((dungeon[*row][*col] & (HORWALL | VERTWALL | HIDDEN)) &&
 177                                         (!(dungeon[*row][*col] & TRAP)))) {
 178                         *row = orow;
 179                         *col = ocol;
 180                         return(0);
 181                 }
 182                 if ((i != 0) && rogue_can_see(orow, ocol)) {
 183                         mvaddch(orow, ocol, get_dungeon_char(orow, ocol));
 184                 }
 185                 if (rogue_can_see(*row, *col)) {
 186                         if (!(dungeon[*row][*col] & MONSTER)) {
 187                                 mvaddch(*row, *col, ch);
 188                         }
 189                         refresh();
 190                 }
 191                 orow = *row; ocol = *col;
 192                 if (dungeon[*row][*col] & MONSTER) {
 193                         if (!imitating(*row, *col)) {
 194                                 return(object_at(&level_monsters, *row, *col));
 195                         }
 196                 }
 197                 if (dungeon[*row][*col] & TUNNEL) {
 198                         i += 2;
 199                 }
 200         }
 201         return(0);
 202 }
 203
 204 static void
 205 flop_weapon(object *weapon, short row, short col)
 206 {
 207         object *new_weapon, *monster;
 208         short i = 0;
 209         char msg[80];
 210         boolean found = 0;
 211         short mch, dch;
 212         unsigned short mon;
 213
 214         while ((i < 9) && dungeon[row][col] & ~(FLOOR | TUNNEL | DOOR | MONSTER)) {
 215                 rand_around(i++, &row, &col);
 216                 if ((row > (DROWS-2)) || (row < MIN_ROW) ||
 217                         (col > (DCOLS-1)) || (col < 0) || (!dungeon[row][col]) ||
 218                         (dungeon[row][col] & ~(FLOOR | TUNNEL | DOOR | MONSTER))) {
 219                         continue;
 220                 }
 221                 found = 1;
 222                 break;
 223         }
 224
 225         if (found || (i == 0)) {
 226                 new_weapon = alloc_object();
 227                 *new_weapon = *weapon;
 228                 new_weapon->in_use_flags = NOT_USED;
 229                 new_weapon->quantity = 1;
 230                 new_weapon->ichar = 'L';
 231                 place_at(new_weapon, row, col);
 232                 if (rogue_can_see(row, col) &&
 233                                 ((row != rogue.row) || (col != rogue.col))) {
 234                         mon = dungeon[row][col] & MONSTER;
 235                         dungeon[row][col] &= (~MONSTER);
 236                         dch = get_dungeon_char(row, col);
 237                         if (mon) {
 238                                 mch = mvinch(row, col);
 239                                 if ((monster = object_at(&level_monsters, row, col))) {
 240                                         monster->trail_char = dch;
 241                                 }
 242                                 if ((mch < 'A') || (mch > 'Z')) {
 243                                         mvaddch(row, col, dch);
 244                                 }
 245                         } else {
 246                                 mvaddch(row, col, dch);
 247                         }
 248                         dungeon[row][col] |= mon;
 249                 }
 250         } else {
 251                 short t;
 252
 253                 t = weapon->quantity;
 254                 weapon->quantity = 1;
 255                 sprintf(msg, "the %svanishes as it hits the ground",
 256                 name_of(weapon));
 257                 weapon->quantity = t;
 258                 message(msg, 0);
 259         }
 260 }
 261
 262 void
 263 rand_around(short i, short *r, short *c)
 264 {
 265         static char pos[] = "\010\007\001\003\004\005\002\006\0";
 266         static short row, col;
 267         short j;
 268
 269         if (i == 0) {
 270                 short x, y, o, t;
 271
 272                 row = *r;
 273                 col = *c;
 274
 275                 o = get_rand(1, 8);
 276
 277                 for (j = 0; j < 5; j++) {
 278                         x = get_rand(0, 8);
 279                         y = (x + o) % 9;
 280                         t = pos[x];
 281                         pos[x] = pos[y];
 282                         pos[y] = t;
 283                 }
 284         }
 285         switch((short)pos[i]) {
 286         case 0:
 287                 *r = row + 1;
 288                 *c = col + 1;
 289                 break;
 290         case 1:
 291                 *r = row + 1;
 292                 *c = col - 1;
 293                 break;
 294         case 2:
 295                 *r = row - 1;
 296                 *c = col + 1;
 297                 break;
 298         case 3:
 299                 *r = row - 1;
 300                 *c = col - 1;
 301                 break;
 302         case 4:
 303                 *r = row;
 304                 *c = col + 1;
 305                 break;
 306         case 5:
 307                 *r = row + 1;
 308                 *c = col;
 309                 break;
 310         case 6:
 311                 *r = row;
 312                 *c = col;
 313                 break;
 314         case 7:
 315                 *r = row - 1;
 316                 *c = col;
 317                 break;
 318         case 8:
 319                 *r = row;
 320                 *c = col - 1;
 321                 break;
 322         }
 323 }