battlestar/fly.c

   1 /*      $NetBSD: fly.c,v 1.7 1999/04/18 03:30:12 simonb Exp $   */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)fly.c       8.2 (Berkeley) 4/28/95";
  40 #else
  41 __RCSID("$NetBSD: fly.c,v 1.7 1999/04/18 03:30:12 simonb Exp $");
  42 #endif
  43 #endif                          /* not lint */
  44
  45 #include "extern.h"
  46 #undef UP
  47 #include <curses.h>
  48
  49 #define abs(a)  ((a) < 0 ? -(a) : (a))
  50 #define MIDR  (LINES/2 - 1)
  51 #define MIDC  (COLS/2 - 1)
  52
  53 int     row, column;
  54 int     dr = 0, dc = 0;
  55 char    destroyed;
  56 int     ourclock = 120;         /* time for all the flights in the game */
  57 char    cross = 0;
  58 sig_t   oldsig;
  59
  60 void
  61 succumb(dummy)
  62         int     dummy;
  63 {
  64         if (oldsig == SIG_DFL) {
  65                 endfly();
  66                 exit(1);
  67         }
  68         if (oldsig != SIG_IGN) {
  69                 endfly();
  70                 (*oldsig) (SIGINT);
  71         }
  72 }
  73
  74 int
  75 visual()
  76 {
  77         destroyed = 0;
  78         if (initscr() == NULL) {
  79                 puts("Whoops!  No more memory...");
  80                 return (0);
  81         }
  82         oldsig = signal(SIGINT, succumb);
  83         crmode();
  84         noecho();
  85         screen();
  86         row = rnd(LINES - 3) + 1;
  87         column = rnd(COLS - 2) + 1;
  88         moveenemy(0);
  89         for (;;) {
  90                 switch (getchar()) {
  91
  92                 case 'h':
  93                 case 'r':
  94                         dc = -1;
  95                         fuel--;
  96                         break;
  97
  98                 case 'H':
  99                 case 'R':
 100                         dc = -5;
 101                         fuel -= 10;
 102                         break;
 103
 104                 case 'l':
 105                         dc = 1;
 106                         fuel--;
 107                         break;
 108
 109                 case 'L':
 110                         dc = 5;
 111                         fuel -= 10;
 112                         break;
 113
 114                 case 'j':
 115                 case 'u':
 116                         dr = 1;
 117                         fuel--;
 118                         break;
 119
 120                 case 'J':
 121                 case 'U':
 122                         dr = 5;
 123                         fuel -= 10;
 124                         break;
 125
 126                 case 'k':
 127                 case 'd':
 128                         dr = -1;
 129                         fuel--;
 130                         break;
 131
 132                 case 'K':
 133                 case 'D':
 134                         dr = -5;
 135                         fuel -= 10;
 136                         break;
 137
 138                 case '+':
 139                         if (cross) {
 140                                 cross = 0;
 141                                 notarget();
 142                         } else
 143                                 cross = 1;
 144                         break;
 145
 146                 case ' ':
 147                 case 'f':
 148                         if (torps) {
 149                                 torps -= 2;
 150                                 blast();
 151                                 if (row == MIDR && column - MIDC < 2 && MIDC - column < 2) {
 152                                         destroyed = 1;
 153                                         alarm(0);
 154                                 }
 155                         } else
 156                                 mvaddstr(0, 0, "*** Out of torpedoes. ***");
 157                         break;
 158
 159                 case 'q':
 160                         endfly();
 161                         return (0);
 162
 163                 default:
 164                         mvaddstr(0, 26, "Commands = r,R,l,L,u,U,d,D,f,+,q");
 165                         continue;
 166
 167                 case EOF:
 168                         break;
 169                 }
 170                 if (destroyed) {
 171                         endfly();
 172                         return (1);
 173                 }
 174                 if (ourclock <= 0) {
 175                         endfly();
 176                         die();
 177                 }
 178         }
 179 }
 180
 181 void
 182 screen()
 183 {
 184         int     r, c, n;
 185         int     i;
 186
 187         clear();
 188         i = rnd(100);
 189         for (n = 0; n < i; n++) {
 190                 r = rnd(LINES - 3) + 1;
 191                 c = rnd(COLS);
 192                 mvaddch(r, c, '.');
 193         }
 194         mvaddstr(LINES - 1 - 1, 21, "TORPEDOES           FUEL           TIME");
 195         refresh();
 196 }
 197
 198 void
 199 target()
 200 {
 201         int     n;
 202
 203         move(MIDR, MIDC - 10);
 204         addstr("-------   +   -------");
 205         for (n = MIDR - 4; n < MIDR - 1; n++) {
 206                 mvaddch(n, MIDC, '|');
 207                 mvaddch(n + 6, MIDC, '|');
 208         }
 209 }
 210
 211 void
 212 notarget()
 213 {
 214         int     n;
 215
 216         move(MIDR, MIDC - 10);
 217         addstr("                     ");
 218         for (n = MIDR - 4; n < MIDR - 1; n++) {
 219                 mvaddch(n, MIDC, ' ');
 220                 mvaddch(n + 6, MIDC, ' ');
 221         }
 222 }
 223
 224 void
 225 blast()
 226 {
 227         int     n;
 228
 229         alarm(0);
 230         move(LINES - 1, 24);
 231         printw("%3d", torps);
 232         for (n = LINES - 1 - 2; n >= MIDR + 1; n--) {
 233                 mvaddch(n, MIDC + MIDR - n, '/');
 234                 mvaddch(n, MIDC - MIDR + n, '\\');
 235                 refresh();
 236         }
 237         mvaddch(MIDR, MIDC, '*');
 238         for (n = LINES - 1 - 2; n >= MIDR + 1; n--) {
 239                 mvaddch(n, MIDC + MIDR - n, ' ');
 240                 mvaddch(n, MIDC - MIDR + n, ' ');
 241                 refresh();
 242         }
 243         alarm(1);
 244 }
 245
 246 void
 247 moveenemy(dummy)
 248         int     dummy;
 249 {
 250         double  d;
 251         int     oldr, oldc;
 252
 253         oldr = row;
 254         oldc = column;
 255         if (fuel > 0) {
 256                 if (row + dr <= LINES - 3 && row + dr > 0)
 257                         row += dr;
 258                 if (column + dc < COLS - 1 && column + dc > 0)
 259                         column += dc;
 260         } else
 261                 if (fuel < 0) {
 262                         fuel = 0;
 263                         mvaddstr(0, 60, "*** Out of fuel ***");
 264                 }
 265         d = (double) ((row - MIDR) * (row - MIDR) + (column - MIDC) * (column - MIDC));
 266         if (d < 16) {
 267                 row += (rnd(9) - 4) % (4 - abs(row - MIDR));
 268                 column += (rnd(9) - 4) % (4 - abs(column - MIDC));
 269         }
 270         ourclock--;
 271         mvaddstr(oldr, oldc - 1, "   ");
 272         if (cross)
 273                 target();
 274         mvaddstr(row, column - 1, "/-\\");
 275         move(LINES - 1, 24);
 276         printw("%3d", torps);
 277         move(LINES - 1, 42);
 278         printw("%3d", fuel);
 279         move(LINES - 1, 57);
 280         printw("%3d", ourclock);
 281         refresh();
 282         signal(SIGALRM, moveenemy);
 283         alarm(1);
 284 }
 285
 286 void
 287 endfly()
 288 {
 289         alarm(0);
 290         signal(SIGALRM, SIG_DFL);
 291         mvcur(0, COLS - 1, LINES - 1, 0);
 292         endwin();
 293         signal(SIGTSTP, SIG_DFL);
 294         signal(SIGINT, oldsig);
 295 }