trek/computer.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * 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
  34 #ifndef lint
  35 /*static char sccsid[] = "from: @(#)computer.c  4.8 (Berkeley) 6/1/90";*/
  36 static char rcsid[] = "$Id: computer.c,v 1.2 1993/08/01 18:50:46 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 # include       "trek.h"
  40 # include       "getpar.h"
  41 # include       <stdio.h>
  42 /*
  43 **  On-Board Computer
  44 **
  45 **      A computer request is fetched from the captain.  The requests
  46 **      are:
  47 **
  48 **      chart -- print a star chart of the known galaxy.  This includes
  49 **              every quadrant that has ever had a long range or
  50 **              a short range scan done of it, plus the location of
  51 **              all starbases.  This is of course updated by any sub-
  52 **              space radio broadcasts (unless the radio is out).
  53 **              The format is the same as that of a long range scan
  54 **              except that ".1." indicates that a starbase exists
  55 **              but we know nothing else.
  56 **
  57 **      trajectory -- gives the course and distance to every know
  58 **              Klingon in the quadrant.  Obviously this fails if the
  59 **              short range scanners are out.
  60 **
  61 **      course -- gives a course computation from whereever you are
  62 **              to any specified location.  If the course begins
  63 **              with a slash, the current quadrant is taken.
  64 **              Otherwise the input is quadrant and sector coordi-
  65 **              nates of the target sector.
  66 **
  67 **      move -- identical to course, except that the move is performed.
  68 **
  69 **      score -- prints out the current score.
  70 **
  71 **      pheff -- "PHaser EFFectiveness" at a given distance.  Tells
  72 **              you how much stuff you need to make it work.
  73 **
  74 **      warpcost -- Gives you the cost in time and units to move for
  75 **              a given distance under a given warp speed.
  76 **
  77 **      impcost -- Same for the impulse engines.
  78 **
  79 **      distresslist -- Gives a list of the currently known starsystems
  80 **              or starbases which are distressed, together with their
  81 **              quadrant coordinates.
  82 **
  83 **      If a command is terminated with a semicolon, you remain in
  84 **      the computer; otherwise, you escape immediately to the main
  85 **      command processor.
  86 */
  87
  88 struct cvntab   Cputab[] =
  89 {
  90         "ch",                   "art",                  (int (*)())1,           0,
  91         "t",                    "rajectory",            (int (*)())2,           0,
  92         "c",                    "ourse",                (int (*)())3,           0,
  93         "m",                    "ove",                  (int (*)())3,           1,
  94         "s",                    "core",                 (int (*)())4,           0,
  95         "p",                    "heff",                 (int (*)())5,           0,
  96         "w",                    "arpcost",              (int (*)())6,           0,
  97         "i",                    "mpcost",               (int (*)())7,           0,
  98         "d",                    "istresslist",          (int (*)())8,           0,
  99         0
 100 };
 101
 102 computer()
 103 {
 104         int                     ix, iy;
 105         register int            i, j;
 106         int                     numout;
 107         int                     tqx, tqy;
 108         struct cvntab           *r;
 109         int                     cost;
 110         int                     course;
 111         double                  dist, time;
 112         double                  warpfact;
 113         struct quad             *q;
 114         register struct event   *e;
 115
 116         if (check_out(COMPUTER))
 117                 return;
 118         while (1)
 119         {
 120                 r = getcodpar("\nRequest", Cputab);
 121                 switch ((int)r->value)
 122                 {
 123
 124                   case 1:                       /* star chart */
 125                         printf("Computer record of galaxy for all long range sensor scans\n\n");
 126                         printf("  ");
 127                         /* print top header */
 128                         for (i = 0; i < NQUADS; i++)
 129                                 printf("-%d- ", i);
 130                         printf("\n");
 131                         for (i = 0; i < NQUADS; i++)
 132                         {
 133                                 printf("%d ", i);
 134                                 for (j = 0; j < NQUADS; j++)
 135                                 {
 136                                         if (i == Ship.quadx && j == Ship.quady)
 137                                         {
 138                                                 printf("$$$ ");
 139                                                 continue;
 140                                         }
 141                                         q = &Quad[i][j];
 142                                         /* 1000 or 1001 is special case */
 143                                         if (q->scanned >= 1000)
 144                                                 if (q->scanned > 1000)
 145                                                         printf(".1. ");
 146                                                 else
 147                                                         printf("/// ");
 148                                         else
 149                                                 if (q->scanned < 0)
 150                                                         printf("... ");
 151                                                 else
 152                                                         printf("%3d ", q->scanned);
 153                                 }
 154                                 printf("%d\n", i);
 155                         }
 156                         printf("  ");
 157                         /* print bottom footer */
 158                         for (i = 0; i < NQUADS; i++)
 159                                 printf("-%d- ", i);
 160                         printf("\n");
 161                         break;
 162
 163                   case 2:                       /* trajectory */
 164                         if (check_out(SRSCAN))
 165                         {
 166                                 break;
 167                         }
 168                         if (Etc.nkling <= 0)
 169                         {
 170                                 printf("No Klingons in this quadrant\n");
 171                                 break;
 172                         }
 173                         /* for each Klingon, give the course & distance */
 174                         for (i = 0; i < Etc.nkling; i++)
 175                         {
 176                                 printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
 177                                 course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
 178                                 prkalc(course, dist);
 179                         }
 180                         break;
 181
 182                   case 3:                       /* course calculation */
 183                         if (readdelim('/'))
 184                         {
 185                                 tqx = Ship.quadx;
 186                                 tqy = Ship.quady;
 187                         }
 188                         else
 189                         {
 190                                 ix = getintpar("Quadrant");
 191                                 if (ix < 0 || ix >= NSECTS)
 192                                         break;
 193                                 iy = getintpar("q-y");
 194                                 if (iy < 0 || iy >= NSECTS)
 195                                         break;
 196                                 tqx = ix;
 197                                 tqy = iy;
 198                         }
 199                         ix = getintpar("Sector");
 200                         if (ix < 0 || ix >= NSECTS)
 201                                 break;
 202                         iy = getintpar("s-y");
 203                         if (iy < 0 || iy >= NSECTS)
 204                                 break;
 205                         course = kalc(tqx, tqy, ix, iy, &dist);
 206                         if (r->value2)
 207                         {
 208                                 warp(-1, course, dist);
 209                                 break;
 210                         }
 211                         printf("%d,%d/%d,%d to %d,%d/%d,%d",
 212                                 Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
 213                         prkalc(course, dist);
 214                         break;
 215
 216                   case 4:                       /* score */
 217                         score();
 218                         break;
 219
 220                   case 5:                       /* phaser effectiveness */
 221                         dist = getfltpar("range");
 222                         if (dist < 0.0)
 223                                 break;
 224                         dist *= 10.0;
 225                         cost = pow(0.90, dist) * 98.0 + 0.5;
 226                         printf("Phasers are %d%% effective at that range\n", cost);
 227                         break;
 228
 229                   case 6:                       /* warp cost (time/energy) */
 230                         dist = getfltpar("distance");
 231                         if (dist < 0.0)
 232                                 break;
 233                         warpfact = getfltpar("warp factor");
 234                         if (warpfact <= 0.0)
 235                                 warpfact = Ship.warp;
 236                         cost = (dist + 0.05) * warpfact * warpfact * warpfact;
 237                         time = Param.warptime * dist / (warpfact * warpfact);
 238                         printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
 239                                 warpfact, dist, time, cost, cost + cost);
 240                         break;
 241
 242                   case 7:                       /* impulse cost */
 243                         dist = getfltpar("distance");
 244                         if (dist < 0.0)
 245                                 break;
 246                         cost = 20 + 100 * dist;
 247                         time = dist / 0.095;
 248                         printf("Distance %.2f cost %.2f stardates %d units\n",
 249                                 dist, time, cost);
 250                         break;
 251
 252                   case 8:                       /* distresslist */
 253                         j = 1;
 254                         printf("\n");
 255                         /* scan the event list */
 256                         for (i = 0; i < MAXEVENTS; i++)
 257                         {
 258                                 e = &Event[i];
 259                                 /* ignore hidden entries */
 260                                 if (e->evcode & E_HIDDEN)
 261                                         continue;
 262                                 switch (e->evcode & E_EVENT)
 263                                 {
 264
 265                                   case E_KDESB:
 266                                         printf("Klingon is attacking starbase in quadrant %d,%d\n",
 267                                                 e->x, e->y);
 268                                         j = 0;
 269                                         break;
 270
 271                                   case E_ENSLV:
 272                                   case E_REPRO:
 273                                         printf("Starsystem %s in quadrant %d,%d is distressed\n",
 274                                                 Systemname[e->systemname], e->x, e->y);
 275                                         j = 0;
 276                                         break;
 277                                 }
 278                         }
 279                         if (j)
 280                                 printf("No known distress calls are active\n");
 281                         break;
 282
 283                 }
 284
 285                 /* skip to next semicolon or newline.  Semicolon
 286                  * means get new computer request; newline means
 287                  * exit computer mode. */
 288                 while ((i = cgetc(0)) != ';')
 289                 {
 290                         if (i == '\0')
 291                                 exit(1);
 292                         if (i == '\n')
 293                         {
 294                                 ungetc(i, stdin);
 295                                 return;
 296                         }
 297                 }
 298         }
 299 }
 300
 301
 302 /*
 303 **  Course Calculation
 304 **
 305 **      Computes and outputs the course and distance from position
 306 **      sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
 307 */
 308
 309 kalc(tqx, tqy, tsx, tsy, dist)
 310 int     tqx;
 311 int     tqy;
 312 int     tsx;
 313 int     tsy;
 314 double  *dist;
 315 {
 316         double                  dx, dy;
 317         double                  quadsize;
 318         double                  angle;
 319         register int            course;
 320
 321         /* normalize to quadrant distances */
 322         quadsize = NSECTS;
 323         dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
 324         dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
 325
 326         /* get the angle */
 327         angle = atan2(dy, dx);
 328         /* make it 0 -> 2 pi */
 329         if (angle < 0.0)
 330                 angle += 6.283185307;
 331         /* convert from radians to degrees */
 332         course = angle * 57.29577951 + 0.5;
 333         dx = dx * dx + dy * dy;
 334         *dist = sqrt(dx);
 335         return (course);
 336 }
 337
 338
 339 prkalc(course, dist)
 340 int     course;
 341 double  dist;
 342 {
 343         printf(": course %d  dist %.3f\n", course, dist);
 344 }