trek/warp.c

   1 /*      $NetBSD: warp.c,v 1.3 1995/04/22 10:59:40 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[] = "@(#)warp.c      8.1 (Berkeley) 5/31/93";
  39 #else
  40 static char rcsid[] = "$NetBSD: warp.c,v 1.3 1995/04/22 10:59:40 cgd Exp $";
  41 #endif
  42 #endif /* not lint */
  43
  44 # include       "trek.h"
  45
  46 /*
  47 **  MOVE UNDER WARP POWER
  48 **
  49 **      This is both the "move" and the "ram" commands, differing
  50 **      only in the flag 'fl'.  It is also used for automatic
  51 **      emergency override mode, when 'fl' is < 0 and 'c' and 'd'
  52 **      are the course and distance to be moved.  If 'fl' >= 0,
  53 **      the course and distance are asked of the captain.
  54 **
  55 **      The guts of this routine are in the routine move(), which
  56 **      is shared with impulse().  Also, the working part of this
  57 **      routine is very small; the rest is to handle the slight chance
  58 **      that you may be moving at some riduculous speed.  In that
  59 **      case, there is code to handle time warps, etc.
  60 */
  61
  62 warp(fl, c, d)
  63 int     fl, c;
  64 double  d;
  65 {
  66         int                     course;
  67         double                  power;
  68         double                  dist;
  69         double                  time;
  70         double                  speed;
  71         double                  frac;
  72         register int            percent;
  73         register int            i;
  74         extern double           move();
  75
  76         if (Ship.cond == DOCKED)
  77                 return (printf("%s is docked\n", Ship.shipname));
  78         if (damaged(WARP))
  79         {
  80                 return (out(WARP));
  81         }
  82         if (fl < 0)
  83         {
  84                 course = c;
  85                 dist = d;
  86         }
  87         else
  88                 if (getcodi(&course, &dist))
  89                         return;
  90
  91         /* check to see that we are not using an absurd amount of power */
  92         power = (dist + 0.05) * Ship.warp3;
  93         percent = 100 * power / Ship.energy + 0.5;
  94         if (percent >= 85)
  95         {
  96                 printf("Scotty: That would consume %d%% of our remaining energy.\n",
  97                         percent);
  98                 if (!getynpar("Are you sure that is wise"))
  99                         return;
 100         }
 101
 102         /* compute the speed we will move at, and the time it will take */
 103         speed = Ship.warp2 / Param.warptime;
 104         time = dist / speed;
 105
 106         /* check to see that that value is not ridiculous */
 107         percent = 100 * time / Now.time + 0.5;
 108         if (percent >= 85)
 109         {
 110                 printf("Spock: That would take %d%% of our remaining time.\n",
 111                         percent);
 112                 if (!getynpar("Are you sure that is wise"))
 113                         return;
 114         }
 115
 116         /* compute how far we will go if we get damages */
 117         if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0))
 118         {
 119                 frac = franf();
 120                 dist *= frac;
 121                 time *= frac;
 122                 damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20);
 123         }
 124
 125         /* do the move */
 126         Move.time = move(fl, course, time, speed);
 127
 128         /* see how far we actually went, and decrement energy appropriately */
 129         dist = Move.time * speed;
 130         Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1);
 131
 132         /* test for bizarre events */
 133         if (Ship.warp <= 9.0)
 134                 return;
 135         printf("\n\n  ___ Speed exceeding warp nine ___\n\n");
 136         sleep(2);
 137         printf("Ship's safety systems malfunction\n");
 138         sleep(2);
 139         printf("Crew experiencing extreme sensory distortion\n");
 140         sleep(4);
 141         if (ranf(100) >= 100 * dist)
 142         {
 143                 return (printf("Equilibrium restored -- all systems normal\n"));
 144         }
 145
 146         /* select a bizzare thing to happen to us */
 147         percent = ranf(100);
 148         if (percent < 70)
 149         {
 150                 /* time warp */
 151                 if (percent < 35 || !Game.snap)
 152                 {
 153                         /* positive time warp */
 154                         time = (Ship.warp - 8.0) * dist * (franf() + 1.0);
 155                         Now.date += time;
 156                         printf("Positive time portal entered -- it is now Stardate %.2f\n",
 157                                 Now.date);
 158                         for (i = 0; i < MAXEVENTS; i++)
 159                         {
 160                                 percent = Event[i].evcode;
 161                                 if (percent == E_FIXDV || percent == E_LRTB)
 162                                         Event[i].date += time;
 163                         }
 164                         return;
 165                 }
 166
 167                 /* s/he got lucky: a negative time portal */
 168                 time = Now.date;
 169                 i = (int) Etc.snapshot;
 170                 bmove(i, Quad, sizeof Quad);
 171                 bmove(i += sizeof Quad, Event, sizeof Event);
 172                 bmove(i += sizeof Event, &Now, sizeof Now);
 173                 printf("Negative time portal entered -- it is now Stardate %.2f\n",
 174                         Now.date);
 175                 for (i = 0; i < MAXEVENTS; i++)
 176                         if (Event[i].evcode == E_FIXDV)
 177                                 reschedule(&Event[i], Event[i].date - time);
 178                 return;
 179         }
 180
 181         /* test for just a lot of damage */
 182         if (percent < 80)
 183                 lose(L_TOOFAST);
 184         printf("Equilibrium restored -- extreme damage occured to ship systems\n");
 185         for (i = 0; i < NDEV; i++)
 186                 damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]);
 187         Ship.shldup = 0;
 188 }