trek/computer.c

   1 /*      $NetBSD: computer.c,v 1.4 1995/04/24 12:25:51 cgd Exp $ */
   2
   3 /*
   4  * Copyright (c) 1980, 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 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)computer.c  8.1 (Berkeley) 5/31/93";
  39 #else
  40 static char rcsid[] = "$NetBSD: computer.c,v 1.4 1995/04/24 12:25:51 cgd Exp $";
  41 #endif
  42 #endif /* not lint */
  43
  44 # include       "trek.h"
  45 # include       "getpar.h"
  46 # include       <stdio.h>
  47 /*
  48 **  On-Board Computer
  49 **
  50 **      A computer request is fetched from the captain.  The requests
  51 **      are:
  52 **
  53 **      chart -- print a star chart of the known galaxy.  This includes
  54 **              every quadrant that has ever had a long range or
  55 **              a short range scan done of it, plus the location of
  56 **              all starbases.  This is of course updated by any sub-
  57 **              space radio broadcasts (unless the radio is out).
  58 **              The format is the same as that of a long range scan
  59 **              except that ".1." indicates that a starbase exists
  60 **              but we know nothing else.
  61 **
  62 **      trajectory -- gives the course and distance to every know
  63 **              Klingon in the quadrant.  Obviously this fails if the
  64 **              short range scanners are out.
  65 **
  66 **      course -- gives a course computation from whereever you are
  67 **              to any specified location.  If the course begins
  68 **              with a slash, the current quadrant is taken.
  69 **              Otherwise the input is quadrant and sector coordi-
  70 **              nates of the target sector.
  71 **
  72 **      move -- identical to course, except that the move is performed.
  73 **
  74 **      score -- prints out the current score.
  75 **
  76 **      pheff -- "PHaser EFFectiveness" at a given distance.  Tells
  77 **              you how much stuff you need to make it work.
  78 **
  79 **      warpcost -- Gives you the cost in time and units to move for
  80 **              a given distance under a given warp speed.
  81 **
  82 **      impcost -- Same for the impulse engines.
  83 **
  84 **      distresslist -- Gives a list of the currently known starsystems
  85 **              or starbases which are distressed, together with their
  86 **              quadrant coordinates.
  87 **
  88 **      If a command is terminated with a semicolon, you remain in
  89 **      the computer; otherwise, you escape immediately to the main
  90 **      command processor.
  91 */
  92
  93 struct cvntab   Cputab[] =
  94 {
  95         "ch",                   "art",                  (int (*)())1,           0,
  96         "t",                    "rajectory",            (int (*)())2,           0,
  97         "c",                    "ourse",                (int (*)())3,           0,
  98         "m",                    "ove",                  (int (*)())3,           1,
  99         "s",                    "core",                 (int (*)())4,           0,
 100         "p",                    "heff",                 (int (*)())5,           0,
 101         "w",                    "arpcost",              (int (*)())6,           0,
 102         "i",                    "mpcost",               (int (*)())7,           0,
 103         "d",                    "istresslist",          (int (*)())8,           0,
 104         0
 105 };
 106
 107 computer()
 108 {
 109         int                     ix, iy;
 110         register int            i, j;
 111         int                     numout;
 112         int                     tqx, tqy;
 113         struct cvntab           *r;
 114         int                     cost;
 115         int                     course;
 116         double                  dist, time;
 117         double                  warpfact;
 118         struct quad             *q;
 119         register struct event   *e;
 120
 121         if (check_out(COMPUTER))
 122                 return;
 123         while (1)
 124         {
 125                 r = getcodpar("\nRequest", Cputab);
 126                 switch ((long)r->value)
 127                 {
 128
 129                   case 1:                       /* star chart */
 130                         printf("Computer record of galaxy for all long range sensor scans\n\n");
 131                         printf("  ");
 132                         /* print top header */
 133                         for (i = 0; i < NQUADS; i++)
 134                                 printf("-%d- ", i);
 135                         printf("\n");
 136                         for (i = 0; i < NQUADS; i++)
 137                         {
 138                                 printf("%d ", i);
 139                                 for (j = 0; j < NQUADS; j++)
 140                                 {
 141                                         if (i == Ship.quadx && j == Ship.quady)
 142                                         {
 143                                                 printf("$$$ ");
 144                                                 continue;
 145                                         }
 146                                         q = &Quad[i][j];
 147                                         /* 1000 or 1001 is special case */
 148                                         if (q->scanned >= 1000)
 149                                                 if (q->scanned > 1000)
 150                                                         printf(".1. ");
 151                                                 else
 152                                                         printf("/// ");
 153                                         else
 154                                                 if (q->scanned < 0)
 155                                                         printf("... ");
 156                                                 else
 157                                                         printf("%3d ", q->scanned);
 158                                 }
 159                                 printf("%d\n", i);
 160                         }
 161                         printf("  ");
 162                         /* print bottom footer */
 163                         for (i = 0; i < NQUADS; i++)
 164                                 printf("-%d- ", i);
 165                         printf("\n");
 166                         break;
 167
 168                   case 2:                       /* trajectory */
 169                         if (check_out(SRSCAN))
 170                         {
 171                                 break;
 172                         }
 173                         if (Etc.nkling <= 0)
 174                         {
 175                                 printf("No Klingons in this quadrant\n");
 176                                 break;
 177                         }
 178                         /* for each Klingon, give the course & distance */
 179                         for (i = 0; i < Etc.nkling; i++)
 180                         {
 181                                 printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
 182                                 course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
 183                                 prkalc(course, dist);
 184                         }
 185                         break;
 186
 187                   case 3:                       /* course calculation */
 188                         if (readdelim('/'))
 189                         {
 190                                 tqx = Ship.quadx;
 191                                 tqy = Ship.quady;
 192                         }
 193                         else
 194                         {
 195                                 ix = getintpar("Quadrant");
 196                                 if (ix < 0 || ix >= NSECTS)
 197                                         break;
 198                                 iy = getintpar("q-y");
 199                                 if (iy < 0 || iy >= NSECTS)
 200                                         break;
 201                                 tqx = ix;
 202                                 tqy = iy;
 203                         }
 204                         ix = getintpar("Sector");
 205                         if (ix < 0 || ix >= NSECTS)
 206                                 break;
 207                         iy = getintpar("s-y");
 208                         if (iy < 0 || iy >= NSECTS)
 209                                 break;
 210                         course = kalc(tqx, tqy, ix, iy, &dist);
 211                         if (r->value2)
 212                         {
 213                                 warp(-1, course, dist);
 214                                 break;
 215                         }
 216                         printf("%d,%d/%d,%d to %d,%d/%d,%d",
 217                                 Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
 218                         prkalc(course, dist);
 219                         break;
 220
 221                   case 4:                       /* score */
 222                         score();
 223                         break;
 224
 225                   case 5:                       /* phaser effectiveness */
 226                         dist = getfltpar("range");
 227                         if (dist < 0.0)
 228                                 break;
 229                         dist *= 10.0;
 230                         cost = pow(0.90, dist) * 98.0 + 0.5;
 231                         printf("Phasers are %d%% effective at that range\n", cost);
 232                         break;
 233
 234                   case 6:                       /* warp cost (time/energy) */
 235                         dist = getfltpar("distance");
 236                         if (dist < 0.0)
 237                                 break;
 238                         warpfact = getfltpar("warp factor");
 239                         if (warpfact <= 0.0)
 240                                 warpfact = Ship.warp;
 241                         cost = (dist + 0.05) * warpfact * warpfact * warpfact;
 242                         time = Param.warptime * dist / (warpfact * warpfact);
 243                         printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
 244                                 warpfact, dist, time, cost, cost + cost);
 245                         break;
 246
 247                   case 7:                       /* impulse cost */
 248                         dist = getfltpar("distance");
 249                         if (dist < 0.0)
 250                                 break;
 251                         cost = 20 + 100 * dist;
 252                         time = dist / 0.095;
 253                         printf("Distance %.2f cost %.2f stardates %d units\n",
 254                                 dist, time, cost);
 255                         break;
 256
 257                   case 8:                       /* distresslist */
 258                         j = 1;
 259                         printf("\n");
 260                         /* scan the event list */
 261                         for (i = 0; i < MAXEVENTS; i++)
 262                         {
 263                                 e = &Event[i];
 264                                 /* ignore hidden entries */
 265                                 if (e->evcode & E_HIDDEN)
 266                                         continue;
 267                                 switch (e->evcode & E_EVENT)
 268                                 {
 269
 270                                   case E_KDESB:
 271                                         printf("Klingon is attacking starbase in quadrant %d,%d\n",
 272                                                 e->x, e->y);
 273                                         j = 0;
 274                                         break;
 275
 276                                   case E_ENSLV:
 277                                   case E_REPRO:
 278                                         printf("Starsystem %s in quadrant %d,%d is distressed\n",
 279                                                 Systemname[e->systemname], e->x, e->y);
 280                                         j = 0;
 281                                         break;
 282                                 }
 283                         }
 284                         if (j)
 285                                 printf("No known distress calls are active\n");
 286                         break;
 287
 288                 }
 289
 290                 /* skip to next semicolon or newline.  Semicolon
 291                  * means get new computer request; newline means
 292                  * exit computer mode. */
 293                 while ((i = cgetc(0)) != ';')
 294                 {
 295                         if (i == '\0')
 296                                 exit(1);
 297                         if (i == '\n')
 298                         {
 299                                 ungetc(i, stdin);
 300                                 return;
 301                         }
 302                 }
 303         }
 304 }
 305
 306
 307 /*
 308 **  Course Calculation
 309 **
 310 **      Computes and outputs the course and distance from position
 311 **      sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
 312 */
 313
 314 kalc(tqx, tqy, tsx, tsy, dist)
 315 int     tqx;
 316 int     tqy;
 317 int     tsx;
 318 int     tsy;
 319 double  *dist;
 320 {
 321         double                  dx, dy;
 322         double                  quadsize;
 323         double                  angle;
 324         register int            course;
 325
 326         /* normalize to quadrant distances */
 327         quadsize = NSECTS;
 328         dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
 329         dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
 330
 331         /* get the angle */
 332         angle = atan2(dy, dx);
 333         /* make it 0 -> 2 pi */
 334         if (angle < 0.0)
 335                 angle += 6.283185307;
 336         /* convert from radians to degrees */
 337         course = angle * 57.29577951 + 0.5;
 338         dx = dx * dx + dy * dy;
 339         *dist = sqrt(dx);
 340         return (course);
 341 }
 342
 343
 344 prkalc(course, dist)
 345 int     course;
 346 double  dist;
 347 {
 348         printf(": course %d  dist %.3f\n", course, dist);
 349 }