4.3BSD - /usr/src/games/battlestar/fly.c

   1: /*
   2:  * Copyright (c) 1983 Regents of the University of California,
   3:  * All rights reserved.  Redistribution permitted subject to
   4:  * the terms of the Berkeley Software License Agreement.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)fly.c	1.3 4/24/85";
   9: #endif
  10: 
  11: #include "externs.h"
  12: #undef UP
  13: #include <curses.h>
  14: 
  15: #define abs(a)  ((a) < 0 ? -(a) : (a))
  16: #define MIDR  (LINES/2 - 1)
  17: #define MIDC  (COLS/2 - 1)
  18: 
  19: int row, column;
  20: int dr = 0, dc = 0;
  21: char destroyed;
  22: int clock = 120;        /* time for all the flights in the game */
  23: char cross = 0;
  24: int (*oldsig)();
  25: 
  26: succumb()
  27: {
  28:     switch (oldsig) {
  29:     case SIG_DFL:
  30:         endfly();
  31:         exit(1);
  32:     case SIG_IGN:
  33:         break;
  34:     default:
  35:         endfly();
  36:         (*oldsig)();
  37:     }
  38: }
  39: 
  40: visual()
  41: {
  42:     int moveenemy();
  43: 
  44:     destroyed = 0;
  45:     savetty();
  46:     if(initscr() == ERR){
  47:         puts("Whoops!  No more memory...");
  48:         return(0);
  49:     }
  50:     oldsig = signal(SIGINT, succumb);
  51:     crmode();
  52:     noecho();
  53:     screen();
  54:     row = rnd(LINES-3) + 1;
  55:     column = rnd(COLS-2) + 1;
  56:     moveenemy();
  57:     for (;;) {
  58:         switch(getchar()){
  59: 
  60:             case 'h':
  61:             case 'r':
  62:                 dc = -1;
  63:                 fuel--;
  64:                 break;
  65: 
  66:             case 'H':
  67:             case 'R':
  68:                 dc = -5;
  69:                 fuel -= 10;
  70:                 break;
  71: 
  72:             case 'l':
  73:                 dc = 1;
  74:                 fuel--;
  75:                 break;
  76: 
  77:             case 'L':
  78:                 dc = 5;
  79:                 fuel -= 10;
  80:                 break;
  81: 
  82:             case 'j':
  83:             case 'u':
  84:                 dr = 1;
  85:                 fuel--;
  86:                 break;
  87: 
  88:             case 'J':
  89:             case 'U':
  90:                 dr = 5;
  91:                 fuel -= 10;
  92:                 break;
  93: 
  94:             case 'k':
  95:             case 'd':
  96:                 dr = -1;
  97:                 fuel--;
  98:                 break;
  99: 
 100:             case 'K':
 101:             case 'D':
 102:                 dr = -5;
 103:                 fuel -= 10;
 104:                 break;
 105: 
 106:             case '+':
 107:                 if (cross){
 108:                     cross = 0;
 109:                     notarget();
 110:                 }
 111:                 else
 112:                     cross = 1;
 113:                 break;
 114: 
 115:             case ' ':
 116:             case 'f':
 117:                 if (torps){
 118:                     torps -= 2;
 119:                     blast();
 120:                     if (row == MIDR && column - MIDC < 2 && MIDC - column < 2){
 121:                         destroyed = 1;
 122:                         alarm(0);
 123:                     }
 124:                 }
 125:                 else
 126:                     mvaddstr(0,0,"*** Out of torpedoes. ***");
 127:                 break;
 128: 
 129:             case 'q':
 130:                 endfly();
 131:                 return(0);
 132: 
 133:             default:
 134:                 mvaddstr(0,26,"Commands = r,R,l,L,u,U,d,D,f,+,q");
 135:                 continue;
 136: 
 137:             case EOF:
 138:                 break;
 139:         }
 140:         if (destroyed){
 141:             endfly();
 142:             return(1);
 143:         }
 144:         if (clock <= 0){
 145:             endfly();
 146:             die();
 147:         }
 148:     }
 149: }
 150: 
 151: screen()
 152: {
 153:     register int r,c,n;
 154:     int i;
 155: 
 156:     clear();
 157:     i = rnd(100);
 158:     for (n=0; n < i; n++){
 159:         r = rnd(LINES-3) + 1;
 160:         c = rnd(COLS);
 161:         mvaddch(r, c, '.');
 162:     }
 163:     mvaddstr(LINES-1-1,21,"TORPEDOES           FUEL           TIME");
 164:     refresh();
 165: }
 166: 
 167: target()
 168: {
 169:     register int n;
 170: 
 171:     move(MIDR,MIDC-10);
 172:     addstr("-------   +   -------");
 173:     for (n = MIDR-4; n < MIDR-1; n++){
 174:         mvaddch(n,MIDC,'|');
 175:         mvaddch(n+6,MIDC,'|');
 176:     }
 177: }
 178: 
 179: notarget()
 180: {
 181:     register int n;
 182: 
 183:     move(MIDR,MIDC-10);
 184:     addstr("                     ");
 185:     for (n = MIDR-4; n < MIDR-1; n++){
 186:         mvaddch(n,MIDC,' ');
 187:         mvaddch(n+6,MIDC,' ');
 188:     }
 189: }
 190: 
 191: blast()
 192: {
 193:     register int n;
 194: 
 195:     alarm(0);
 196:     move(LINES-1, 24);
 197:     printw("%3d", torps);
 198:     for(n = LINES-1-2; n >= MIDR + 1; n--){
 199:         mvaddch(n, MIDC+MIDR-n, '/');
 200:         mvaddch(n, MIDC-MIDR+n, '\\');
 201:         refresh();
 202:     }
 203:     mvaddch(MIDR,MIDC,'*');
 204:     for(n = LINES-1-2; n >= MIDR + 1; n--){
 205:         mvaddch(n, MIDC+MIDR-n, ' ');
 206:         mvaddch(n, MIDC-MIDR+n, ' ');
 207:         refresh();
 208:     }
 209:     alarm(1);
 210: }
 211: 
 212: moveenemy()
 213: {
 214:     double d;
 215:     int oldr, oldc;
 216: 
 217:     oldr = row;
 218:     oldc = column;
 219:     if (fuel > 0){
 220:         if (row + dr <= LINES-3 && row + dr > 0)
 221:             row += dr;
 222:         if (column + dc < COLS-1 && column + dc > 0)
 223:             column += dc;
 224:     } else if (fuel < 0){
 225:         fuel = 0;
 226:         mvaddstr(0,60,"*** Out of fuel ***");
 227:     }
 228:     d = (double) ((row - MIDR)*(row - MIDR) + (column - MIDC)*(column - MIDC));
 229:     if (d < 16){
 230:         row += (rnd(9) - 4) % (4 - abs(row - MIDR));
 231:         column += (rnd(9) - 4) % (4 - abs(column - MIDC));
 232:     }
 233:     clock--;
 234:     mvaddstr(oldr, oldc - 1, "   ");
 235:     if (cross)
 236:         target();
 237:     mvaddstr(row, column - 1, "/-\\");
 238:     move(LINES-1, 24);
 239:     printw("%3d", torps);
 240:     move(LINES-1, 42);
 241:     printw("%3d", fuel);
 242:     move(LINES-1, 57);
 243:     printw("%3d", clock);
 244:     refresh();
 245:     signal(SIGALRM, moveenemy);
 246:     alarm(1);
 247: }
 248: 
 249: endfly()
 250: {
 251:     alarm(0);
 252:     signal(SIGALRM, SIG_DFL);
 253:     mvcur(0,COLS-1,LINES-1,0);
 254:     endwin();
 255:     signal(SIGTSTP, SIG_DFL);
 256:     signal(SIGINT, oldsig);
 257: }

Defined functions

Defined variables

Defined macros