1: /*      $NetBSD: computer.c,v 1.10 2004/01/27 20:30:30 jsm 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. Neither the name of the University nor the names of its contributors
   16:  *    may be used to endorse or promote products derived from this software
   17:  *    without specific prior written permission.
   18:  *
   19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29:  * SUCH DAMAGE.
   30:  */
   31: 
   32: #include <sys/cdefs.h>
   33: #ifndef lint
   34: #if 0
   35: static char sccsid[] = "@(#)computer.c  8.1 (Berkeley) 5/31/93";
   36: #else
   37: __RCSID("$NetBSD: computer.c,v 1.10 2004/01/27 20:30:30 jsm Exp $");
   38: #endif
   39: #endif /* not lint */
   40: 
   41: #include <stdio.h>
   42: #include <stdlib.h>
   43: #include <math.h>
   44: #include "trek.h"
   45: #include "getpar.h"
   46: 
   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",                        (cmdfun)1,           0 },
   96:         { "t",         "rajectory",           (cmdfun)2,               0 },
   97:         { "c",         "ourse",               (cmdfun)3,           0 },
   98:         { "m",         "ove",                 (cmdfun)3,            1 },
   99:         { "s",         "core",                        (cmdfun)4,           0 },
  100:         { "p",         "heff",                        (cmdfun)5,           0 },
  101:         { "w",         "arpcost",             (cmdfun)6,         0 },
  102:         { "i",         "mpcost",              (cmdfun)7,          0 },
  103:         { "d",         "istresslist",         (cmdfun)8,             0 },
  104:         { NULL,                NULL,                 NULL,                 0 }
  105: };
  106: 
  107: static int kalc(int, int, int, int, double *);
  108: static void prkalc(int, double);
  109: 
  110: /*ARGSUSED*/
  111: void
  112: computer(v)
  113:         int v __attribute__((__unused__));
  114: {
  115:         int            ix, iy;
  116:         int            i, j;
  117:         int            tqx, tqy;
  118:         const struct cvntab    *r;
  119:         int            cost;
  120:         int            course;
  121:         double         dist, time;
  122:         double         warpfact;
  123:         struct quad    *q;
  124:         struct event   *e;
  125: 
  126:         if (check_out(COMPUTER))
  127:                 return;
  128:         while (1)
  129:         {
  130:                 r = getcodpar("\nRequest", Cputab);
  131:                 switch ((long)r->value)
  132:                 {
  133: 
  134:                   case 1:                     /* star chart */
  135:                         printf("Computer record of galaxy for all long range sensor scans\n\n");
  136:                         printf("  ");
  137:                         /* print top header */
  138:                         for (i = 0; i < NQUADS; i++)
  139:                                 printf("-%d- ", i);
  140:                         printf("\n");
  141:                         for (i = 0; i < NQUADS; i++)
  142:                         {
  143:                                 printf("%d ", i);
  144:                                 for (j = 0; j < NQUADS; j++)
  145:                                 {
  146:                                         if (i == Ship.quadx && j == Ship.quady)
  147:                                         {
  148:                                                 printf("$$$ ");
  149:                                                 continue;
  150:                                         }
  151:                                         q = &Quad[i][j];
  152:                                         /* 1000 or 1001 is special case */
  153:                                         if (q->scanned >= 1000)
  154:                                                 if (q->scanned > 1000)
  155:                                                         printf(".1. ");
  156:                                                 else
  157:                                                         printf("/// ");
  158:                                         else
  159:                                                 if (q->scanned < 0)
  160:                                                         printf("... ");
  161:                                                 else
  162:                                                         printf("%3d ", q->scanned);
  163:                                 }
  164:                                 printf("%d\n", i);
  165:                         }
  166:                         printf("  ");
  167:                         /* print bottom footer */
  168:                         for (i = 0; i < NQUADS; i++)
  169:                                 printf("-%d- ", i);
  170:                         printf("\n");
  171:                         break;
  172: 
  173:                   case 2:                     /* trajectory */
  174:                         if (check_out(SRSCAN))
  175:                         {
  176:                                 break;
  177:                         }
  178:                         if (Etc.nkling <= 0)
  179:                         {
  180:                                 printf("No Klingons in this quadrant\n");
  181:                                 break;
  182:                         }
  183:                         /* for each Klingon, give the course & distance */
  184:                         for (i = 0; i < Etc.nkling; i++)
  185:                         {
  186:                                 printf("Klingon at %d,%d", Etc.klingon[i].x, Etc.klingon[i].y);
  187:                                 course = kalc(Ship.quadx, Ship.quady, Etc.klingon[i].x, Etc.klingon[i].y, &dist);
  188:                                 prkalc(course, dist);
  189:                         }
  190:                         break;
  191: 
  192:                   case 3:                     /* course calculation */
  193:                         if (readdelim('/'))
  194:                         {
  195:                                 tqx = Ship.quadx;
  196:                                 tqy = Ship.quady;
  197:                         }
  198:                         else
  199:                         {
  200:                                 ix = getintpar("Quadrant");
  201:                                 if (ix < 0 || ix >= NSECTS)
  202:                                         break;
  203:                                 iy = getintpar("q-y");
  204:                                 if (iy < 0 || iy >= NSECTS)
  205:                                         break;
  206:                                 tqx = ix;
  207:                                 tqy = iy;
  208:                         }
  209:                         ix = getintpar("Sector");
  210:                         if (ix < 0 || ix >= NSECTS)
  211:                                 break;
  212:                         iy = getintpar("s-y");
  213:                         if (iy < 0 || iy >= NSECTS)
  214:                                 break;
  215:                         course = kalc(tqx, tqy, ix, iy, &dist);
  216:                         if (r->value2)
  217:                         {
  218:                                 warp(-1, course, dist);
  219:                                 break;
  220:                         }
  221:                         printf("%d,%d/%d,%d to %d,%d/%d,%d",
  222:                                 Ship.quadx, Ship.quady, Ship.sectx, Ship.secty, tqx, tqy, ix, iy);
  223:                         prkalc(course, dist);
  224:                         break;
  225: 
  226:                   case 4:                     /* score */
  227:                         score();
  228:                         break;
  229: 
  230:                   case 5:                     /* phaser effectiveness */
  231:                         dist = getfltpar("range");
  232:                         if (dist < 0.0)
  233:                                 break;
  234:                         dist *= 10.0;
  235:                         cost = pow(0.90, dist) * 98.0 + 0.5;
  236:                         printf("Phasers are %d%% effective at that range\n", cost);
  237:                         break;
  238: 
  239:                   case 6:                     /* warp cost (time/energy) */
  240:                         dist = getfltpar("distance");
  241:                         if (dist < 0.0)
  242:                                 break;
  243:                         warpfact = getfltpar("warp factor");
  244:                         if (warpfact <= 0.0)
  245:                                 warpfact = Ship.warp;
  246:                         cost = (dist + 0.05) * warpfact * warpfact * warpfact;
  247:                         time = Param.warptime * dist / (warpfact * warpfact);
  248:                         printf("Warp %.2f distance %.2f cost %.2f stardates %d (%d w/ shlds up) units\n",
  249:                                 warpfact, dist, time, cost, cost + cost);
  250:                         break;
  251: 
  252:                   case 7:                     /* impulse cost */
  253:                         dist = getfltpar("distance");
  254:                         if (dist < 0.0)
  255:                                 break;
  256:                         cost = 20 + 100 * dist;
  257:                         time = dist / 0.095;
  258:                         printf("Distance %.2f cost %.2f stardates %d units\n",
  259:                                 dist, time, cost);
  260:                         break;
  261: 
  262:                   case 8:                     /* distresslist */
  263:                         j = 1;
  264:                         printf("\n");
  265:                         /* scan the event list */
  266:                         for (i = 0; i < MAXEVENTS; i++)
  267:                         {
  268:                                 e = &Event[i];
  269:                                 /* ignore hidden entries */
  270:                                 if (e->evcode & E_HIDDEN)
  271:                                         continue;
  272:                                 switch (e->evcode & E_EVENT)
  273:                                 {
  274: 
  275:                                   case E_KDESB:
  276:                                         printf("Klingon is attacking starbase in quadrant %d,%d\n",
  277:                                                 e->x, e->y);
  278:                                         j = 0;
  279:                                         break;
  280: 
  281:                                   case E_ENSLV:
  282:                                   case E_REPRO:
  283:                                         printf("Starsystem %s in quadrant %d,%d is distressed\n",
  284:                                                 Systemname[e->systemname], e->x, e->y);
  285:                                         j = 0;
  286:                                         break;
  287:                                 }
  288:                         }
  289:                         if (j)
  290:                                 printf("No known distress calls are active\n");
  291:                         break;
  292: 
  293:                 }
  294: 
  295:                 /* skip to next semicolon or newline.  Semicolon
  296:                  * means get new computer request; newline means
  297:                  * exit computer mode. */
  298:                 while ((i = cgetc(0)) != ';')
  299:                 {
  300:                         if (i == '\0')
  301:                                 exit(1);
  302:                         if (i == '\n')
  303:                         {
  304:                                 ungetc(i, stdin);
  305:                                 return;
  306:                         }
  307:                 }
  308:         }
  309: }
  310: 
  311: 
  312: /*
  313: **  Course Calculation
  314: **
  315: **      Computes and outputs the course and distance from position
  316: **      sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
  317: */
  318: 
  319: static int
  320: kalc(tqx, tqy, tsx, tsy, dist)
  321: int     tqx;
  322: int     tqy;
  323: int     tsx;
  324: int     tsy;
  325: double  *dist;
  326: {
  327:         double                 dx, dy;
  328:         double                 quadsize;
  329:         double                 angle;
  330:         int            course;
  331: 
  332:         /* normalize to quadrant distances */
  333:         quadsize = NSECTS;
  334:         dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
  335:         dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
  336: 
  337:         /* get the angle */
  338:         angle = atan2(dy, dx);
  339:         /* make it 0 -> 2 pi */
  340:         if (angle < 0.0)
  341:                 angle += 6.283185307;
  342:         /* convert from radians to degrees */
  343:         course = angle * 57.29577951 + 0.5;
  344:         dx = dx * dx + dy * dy;
  345:         *dist = sqrt(dx);
  346:         return (course);
  347: }
  348: 
  349: static void
  350: prkalc(course, dist)
  351: int     course;
  352: double  dist;
  353: {
  354:         printf(": course %d  dist %.3f\n", course, dist);
  355: }