games/trek/computer.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)computer.c       8.1 (Berkeley) 5/31/93
  34  * $FreeBSD: src/games/trek/computer.c,v 1.5 1999/11/30 03:49:45 billf Exp $
  35  * $DragonFly: src/games/trek/computer.c,v 1.2 2003/06/17 04:25:25 dillon Exp $
  36  */
  37
  38 # include       "trek.h"
  39 # include       "getpar.h"
  40 # include       <stdio.h>
  41 /*
  42 **  On-Board Computer
  43 **
  44 **      A computer request is fetched from the captain.  The requests
  45 **      are:
  46 **
  47 **      chart -- print a star chart of the known galaxy.  This includes
  48 **              every quadrant that has ever had a long range or
  49 **              a short range scan done of it, plus the location of
  50 **              all starbases.  This is of course updated by any sub-
  51 **              space radio broadcasts (unless the radio is out).
  52 **              The format is the same as that of a long range scan
  53 **              except that ".1." indicates that a starbase exists
  54 **              but we know nothing else.
  55 **
  56 **      trajectory -- gives the course and distance to every know
  57 **              Klingon in the quadrant.  Obviously this fails if the
  58 **              short range scanners are out.
  59 **
  60 **      course -- gives a course computation from whereever you are
  61 **              to any specified location.  If the course begins
  62 **              with a slash, the current quadrant is taken.
  63 **              Otherwise the input is quadrant and sector coordi-
  64 **              nates of the target sector.
  65 **
  66 **      move -- identical to course, except that the move is performed.
  67 **
  68 **      score -- prints out the current score.
  69 **
  70 **      pheff -- "PHaser EFFectiveness" at a given distance.  Tells
  71 **              you how much stuff you need to make it work.
  72 **
  73 **      warpcost -- Gives you the cost in time and units to move for
  74 **              a given distance under a given warp speed.
  75 **
  76 **      impcost -- Same for the impulse engines.
  77 **
  78 **      distresslist -- Gives a list of the currently known starsystems
  79 **              or starbases which are distressed, together with their
  80 **              quadrant coordinates.
  81 **
  82 **      If a command is terminated with a semicolon, you remain in
  83 **      the computer; otherwise, you escape immediately to the main
  84 **      command processor.
  85 */
  86
  87 struct cvntab   Cputab[] =
  88 {
  89         "ch",                   "art",                  (int (*)())1,           0,
  90         "t",                    "rajectory",            (int (*)())2,           0,
  91         "c",                    "ourse",                (int (*)())3,           0,
  92         "m",                    "ove",                  (int (*)())3,           1,
  93         "s",                    "core",                 (int (*)())4,           0,
  94         "p",                    "heff",                 (int (*)())5,           0,
  95         "w",                    "arpcost",              (int (*)())6,           0,
  96         "i",                    "mpcost",               (int (*)())7,           0,
  97         "d",                    "istresslist",          (int (*)())8,           0,
  98         0
  99 };
 100
 101 computer()
 102 {
 103         int                     ix, iy;
 104         int             i, j;
 105         int                     numout;
 106         int                     tqx, tqy;
 107         struct cvntab           *r;
 108         int                     cost;
 109         int                     course;
 110         double                  dist, time;
 111         double                  warpfact;
 112         struct quad             *q;
 113         struct event    *e;
 114
 115         if (check_out(COMPUTER))
 116                 return;
 117         while (1)
 118         {
 119                 r = getcodpar("\nRequest", Cputab);
 120                 switch ((long)r->value)
 121                 {
 122
 123                   case 1:                       /* star chart */
 124                         printf("Computer record of galaxy for all long range sensor scans\n\n");
 125                         printf("  ");
 126                         /* print top header */
 127                         for (i = 0; i < NQUADS; i++)
 128                                 printf("-%d- ", i);
 129                         printf("\n");
 130                         for (i = 0; i < NQUADS; i++)
 131                         {
 132                                 printf("%d ", i);
 133                                 for (j = 0; j < NQUADS; j++)
 134                                 {
 135                                         if (i == Ship.quadx && j == Ship.quady)
 136                                         {
 137                                                 printf("$$$ ");
 138                                                 continue;
 139                                         }
 140                                         q = &Quad[i][j];
 141                                         /* 1000 or 1001 is special case */
 142                                         if (q->scanned >= 1000)
 143                                                 if (q->scanned > 1000)
 144                                                         printf(".1. ");
 145                                                 else
 146                                                         printf("/// ");
 147                                         else
 148                                                 if (q->scanned < 0)
 149                                                         printf("... ");
 150                                                 else
 151                                                         printf("%3d ", q->scanned);
 152                                 }
 153                                 printf("%d\n", i);
 154                         }
 155                         printf("  ");
 156                         /* print bottom footer */
 157                         for (i = 0; i < NQUADS; i++)
 158                                 printf("-%d- ", i);
 159                         printf("\n");
 160                         break;
 161
 162                   case 2:                       /* trajectory */
 163                         if (check_out(SRSCAN))
 164                         {
 165                                 break;
 166                         }
 167                         if (Etc.nkling <= 0)
 168                         {
 169                                 printf("No Klingons in this quadrant\n");
 170                                 break;
 171                         }
 172                         /* for each Klingon, give the course & distance */
 173                         for (i = 0; i < Etc.nkling; i++)
 174                         {
 175                                 printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
 176                                 course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
 177                                 prkalc(course, dist);
 178                         }
 179                         break;
 180
 181                   case 3:                       /* course calculation */
 182                         if (readdelim('/'))
 183                         {
 184                                 tqx = Ship.quadx;
 185                                 tqy = Ship.quady;
 186                         }
 187                         else
 188                         {
 189                                 ix = getintpar("Quadrant");
 190                                 if (ix < 0 || ix >= NSECTS)
 191                                         break;
 192                                 iy = getintpar("q-y");
 193                                 if (iy < 0 || iy >= NSECTS)
 194                                         break;
 195                                 tqx = ix;
 196                                 tqy = iy;
 197                         }
 198                         ix = getintpar("Sector");
 199                         if (ix < 0 || ix >= NSECTS)
 200                                 break;
 201                         iy = getintpar("s-y");
 202                         if (iy < 0 || iy >= NSECTS)
 203                                 break;
 204                         course = kalc(tqx, tqy, ix, iy, &dist);
 205                         if (r->value2)
 206                         {
 207                                 warp(-1, course, dist);
 208                                 break;
 209                         }
 210                         printf("%d,%d/%d,%d to %d,%d/%d,%d",
 211                                 Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
 212                         prkalc(course, dist);
 213                         break;
 214
 215                   case 4:                       /* score */
 216                         score();
 217                         break;
 218
 219                   case 5:                       /* phaser effectiveness */
 220                         dist = getfltpar("range");
 221                         if (dist < 0.0)
 222                                 break;
 223                         dist *= 10.0;
 224                         cost = pow(0.90, dist) * 98.0 + 0.5;
 225                         printf("Phasers are %d%% effective at that range\n", cost);
 226                         break;
 227
 228                   case 6:                       /* warp cost (time/energy) */
 229                         dist = getfltpar("distance");
 230                         if (dist < 0.0)
 231                                 break;
 232                         warpfact = getfltpar("warp factor");
 233                         if (warpfact <= 0.0)
 234                                 warpfact = Ship.warp;
 235                         cost = (dist + 0.05) * warpfact * warpfact * warpfact;
 236                         time = Param.warptime * dist / (warpfact * warpfact);
 237                         printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
 238                                 warpfact, dist, time, cost, cost + cost);
 239                         break;
 240
 241                   case 7:                       /* impulse cost */
 242                         dist = getfltpar("distance");
 243                         if (dist < 0.0)
 244                                 break;
 245                         cost = 20 + 100 * dist;
 246                         time = dist / 0.095;
 247                         printf("Distance %.2f cost %.2f stardates %d units\n",
 248                                 dist, time, cost);
 249                         break;
 250
 251                   case 8:                       /* distresslist */
 252                         j = 1;
 253                         printf("\n");
 254                         /* scan the event list */
 255                         for (i = 0; i < MAXEVENTS; i++)
 256                         {
 257                                 e = &Event[i];
 258                                 /* ignore hidden entries */
 259                                 if (e->evcode & E_HIDDEN)
 260                                         continue;
 261                                 switch (e->evcode & E_EVENT)
 262                                 {
 263
 264                                   case E_KDESB:
 265                                         printf("Klingon is attacking starbase in quadrant %d,%d\n",
 266                                                 e->x, e->y);
 267                                         j = 0;
 268                                         break;
 269
 270                                   case E_ENSLV:
 271                                   case E_REPRO:
 272                                         printf("Starsystem %s in quadrant %d,%d is distressed\n",
 273                                                 Systemname[e->systemname], e->x, e->y);
 274                                         j = 0;
 275                                         break;
 276                                 }
 277                         }
 278                         if (j)
 279                                 printf("No known distress calls are active\n");
 280                         break;
 281
 282                 }
 283
 284                 /* skip to next semicolon or newline.  Semicolon
 285                  * means get new computer request; newline means
 286                  * exit computer mode. */
 287                 while ((i = cgetc(0)) != ';')
 288                 {
 289                         if (i == '\0')
 290                                 exit(1);
 291                         if (i == '\n')
 292                         {
 293                                 ungetc(i, stdin);
 294                                 return;
 295                         }
 296                 }
 297         }
 298 }
 299
 300
 301 /*
 302 **  Course Calculation
 303 **
 304 **      Computes and outputs the course and distance from position
 305 **      sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
 306 */
 307
 308 kalc(tqx, tqy, tsx, tsy, dist)
 309 int     tqx;
 310 int     tqy;
 311 int     tsx;
 312 int     tsy;
 313 double  *dist;
 314 {
 315         double                  dx, dy;
 316         double                  quadsize;
 317         double                  angle;
 318         int             course;
 319
 320         /* normalize to quadrant distances */
 321         quadsize = NSECTS;
 322         dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
 323         dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
 324
 325         /* get the angle */
 326         angle = atan2(dy, dx);
 327         /* make it 0 -> 2 pi */
 328         if (angle < 0.0)
 329                 angle += 6.283185307;
 330         /* convert from radians to degrees */
 331         course = angle * 57.29577951 + 0.5;
 332         dx = dx * dx + dy * dy;
 333         *dist = sqrt(dx);
 334         return (course);
 335 }
 336
 337
 338 prkalc(course, dist)
 339 int     course;
 340 double  dist;
 341 {
 342         printf(": course %d  dist %.3f\n", course, dist);
 343 }