games/rogue/trap.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  * @(#)trap.c   8.1 (Berkeley) 5/31/93
  37  * $FreeBSD: src/games/rogue/trap.c,v 1.6 1999/11/30 03:49:28 billf Exp $
  38  * $DragonFly: src/games/rogue/trap.c,v 1.3 2006/09/02 19:31:07 pavalos Exp $
  39  */
  40
  41 /*
  42  * trap.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 trap traps[MAX_TRAPS];
  56 boolean trap_door = 0;
  57 short bear_trap = 0;
  58
  59 const char *const trap_strings[TRAPS * 2] = {
  60         "trap door",
  61                         "you fell down a trap",
  62         "bear trap",
  63                         "you are caught in a bear trap",
  64         "teleport trap",
  65                         "teleport",
  66         "poison dart trap",
  67                         "a small dart just hit you in the shoulder",
  68         "sleeping gas trap",
  69                         "a strange white mist envelops you and you fall asleep",
  70         "rust trap",
  71                         "a gush of water hits you on the head"
  72 };
  73
  74 extern short cur_level, party_room;
  75 extern const char *new_level_message;
  76 extern boolean interrupted;
  77 extern short ring_exp;
  78 extern boolean sustain_strength;
  79 extern short blind;
  80
  81 static short    trap_at(int, int);
  82
  83 static short
  84 trap_at(int row, int col)
  85 {
  86         short i;
  87
  88         for (i = 0; ((i < MAX_TRAPS) && (traps[i].trap_type != NO_TRAP)); i++) {
  89                 if ((traps[i].trap_row == row) && (traps[i].trap_col == col)) {
  90                         return(traps[i].trap_type);
  91                 }
  92         }
  93         return(NO_TRAP);
  94 }
  95
  96 void
  97 trap_player(short row, short col)
  98 {
  99         short t;
 100
 101         if ((t = trap_at(row, col)) == NO_TRAP) {
 102                 return;
 103         }
 104         dungeon[row][col] &= (~HIDDEN);
 105         if (rand_percent(rogue.exp + ring_exp)) {
 106                 message("the trap failed", 1);
 107                 return;
 108         }
 109         switch(t) {
 110         case TRAP_DOOR:
 111                 trap_door = 1;
 112                 new_level_message = trap_strings[(t*2)+1];
 113                 break;
 114         case BEAR_TRAP:
 115                 message(trap_strings[(t*2)+1], 1);
 116                 bear_trap = get_rand(4, 7);
 117                 break;
 118         case TELE_TRAP:
 119                 mvaddch(rogue.row, rogue.col, '^');
 120                 tele();
 121                 break;
 122         case DART_TRAP:
 123                 message(trap_strings[(t*2)+1], 1);
 124                 rogue.hp_current -= get_damage("1d6", 1);
 125                 if (rogue.hp_current <= 0) {
 126                         rogue.hp_current = 0;
 127                 }
 128                 if ((!sustain_strength) && rand_percent(40) &&
 129                         (rogue.str_current >= 3)) {
 130                         rogue.str_current--;
 131                 }
 132                 print_stats(STAT_HP | STAT_STRENGTH);
 133                 if (rogue.hp_current <= 0) {
 134                         killed_by((object *) 0, POISON_DART);
 135                 }
 136                 break;
 137         case SLEEPING_GAS_TRAP:
 138                 message(trap_strings[(t*2)+1], 1);
 139                 take_a_nap();
 140                 break;
 141         case RUST_TRAP:
 142                 message(trap_strings[(t*2)+1], 1);
 143                 rust((object *) 0);
 144                 break;
 145         }
 146 }
 147
 148 void
 149 add_traps(void)
 150 {
 151         short i, n, tries = 0;
 152         short row, col;
 153
 154         if (cur_level <= 2) {
 155                 n = 0;
 156         } else if (cur_level <= 7) {
 157                 n = get_rand(0, 2);
 158         } else if (cur_level <= 11) {
 159                 n = get_rand(1, 2);
 160         } else if (cur_level <= 16) {
 161                 n = get_rand(2, 3);
 162         } else if (cur_level <= 21) {
 163                 n = get_rand(2, 4);
 164         } else if (cur_level <= (AMULET_LEVEL + 2)) {
 165                 n = get_rand(3, 5);
 166         } else {
 167                 n = get_rand(5, MAX_TRAPS);
 168         }
 169         for (i = 0; i < n; i++) {
 170                 traps[i].trap_type = get_rand(0, (TRAPS - 1));
 171
 172                 if ((i == 0) && (party_room != NO_ROOM)) {
 173                         do {
 174                                 row = get_rand((rooms[party_room].top_row+1),
 175                                                 (rooms[party_room].bottom_row-1));
 176                                 col = get_rand((rooms[party_room].left_col+1),
 177                                                 (rooms[party_room].right_col-1));
 178                                 tries++;
 179                         } while (((dungeon[row][col] & (OBJECT|STAIRS|TRAP|TUNNEL)) ||
 180                                         (dungeon[row][col] == NOTHING)) && (tries < 15));
 181                         if (tries >= 15) {
 182                                 gr_row_col(&row, &col, (FLOOR | MONSTER));
 183                         }
 184                 } else {
 185                         gr_row_col(&row, &col, (FLOOR | MONSTER));
 186                 }
 187                 traps[i].trap_row = row;
 188                 traps[i].trap_col = col;
 189                 dungeon[row][col] |= (TRAP | HIDDEN);
 190         }
 191 }
 192
 193 void
 194 id_trap(void)
 195 {
 196         short dir, row, col, d, t;
 197
 198         message("direction? ", 0);
 199
 200         while (!is_direction(dir = rgetchar(), &d)) {
 201                 sound_bell();
 202         }
 203         check_message();
 204
 205         if (dir == CANCEL) {
 206                 return;
 207         }
 208         row = rogue.row;
 209         col = rogue.col;
 210
 211         get_dir_rc(d, &row, &col, 0);
 212
 213         if ((dungeon[row][col] & TRAP) && (!(dungeon[row][col] & HIDDEN))) {
 214                 t = trap_at(row, col);
 215                 message(trap_strings[t*2], 0);
 216         } else {
 217                 message("no trap there", 0);
 218         }
 219 }
 220
 221 void
 222 show_traps(void)
 223 {
 224         short i, j;
 225
 226         for (i = 0; i < DROWS; i++) {
 227                 for (j = 0; j < DCOLS; j++) {
 228                         if (dungeon[i][j] & TRAP) {
 229                                 mvaddch(i, j, '^');
 230                         }
 231                 }
 232         }
 233 }
 234
 235 void
 236 search(short n, boolean is_auto)
 237 {
 238         short s, i, j, row, col, t;
 239         short shown = 0, found = 0;
 240         static boolean reg_search;
 241
 242         for (i = -1; i <= 1; i++) {
 243                 for (j = -1; j <= 1; j++) {
 244                         row = rogue.row + i;
 245                         col = rogue.col + j;
 246                         if ((row < MIN_ROW) || (row >= (DROWS-1)) ||
 247                                         (col < 0) || (col >= DCOLS)) {
 248                                 continue;
 249                         }
 250                         if (dungeon[row][col] & HIDDEN) {
 251                                 found++;
 252                         }
 253                 }
 254         }
 255         for (s = 0; s < n; s++) {
 256                 for (i = -1; i <= 1; i++) {
 257                         for (j = -1; j <= 1; j++) {
 258                                 row = rogue.row + i;
 259                                 col = rogue.col + j ;
 260                                 if ((row < MIN_ROW) || (row >= (DROWS-1)) ||
 261                                                 (col < 0) || (col >= DCOLS)) {
 262                                         continue;
 263                                 }
 264                                 if (dungeon[row][col] & HIDDEN) {
 265                                         if (rand_percent(17 + (rogue.exp + ring_exp))) {
 266                                                 dungeon[row][col] &= (~HIDDEN);
 267                                                 if ((!blind) && ((row != rogue.row) ||
 268                                                                 (col != rogue.col))) {
 269                                                         mvaddch(row, col, get_dungeon_char(row, col));
 270                                                 }
 271                                                 shown++;
 272                                                 if (dungeon[row][col] & TRAP) {
 273                                                         t = trap_at(row, col);
 274                                                         message(trap_strings[t*2], 1);
 275                                                 }
 276                                         }
 277                                 }
 278                                 if (((shown == found) && (found > 0)) || interrupted) {
 279                                         return;
 280                                 }
 281                         }
 282                 }
 283                 if ((!is_auto) && (reg_search = !reg_search)) {
 284                         reg_move();
 285                 }
 286         }
 287 }