4.3BSD - /usr/src/games/trek/warp.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)warp.c	5.1 (Berkeley) 1/29/86";
   9: #endif not lint
  10: 
  11: # include   "trek.h"
  12: 
  13: /*
  14: **  MOVE UNDER WARP POWER
  15: **
  16: **	This is both the "move" and the "ram" commands, differing
  17: **	only in the flag 'fl'.  It is also used for automatic
  18: **	emergency override mode, when 'fl' is < 0 and 'c' and 'd'
  19: **	are the course and distance to be moved.  If 'fl' >= 0,
  20: **	the course and distance are asked of the captain.
  21: **
  22: **	The guts of this routine are in the routine move(), which
  23: **	is shared with impulse().  Also, the working part of this
  24: **	routine is very small; the rest is to handle the slight chance
  25: **	that you may be moving at some riduculous speed.  In that
  26: **	case, there is code to handle time warps, etc.
  27: */
  28: 
  29: warp(fl, c, d)
  30: int fl, c;
  31: double  d;
  32: {
  33:     int         course;
  34:     double          power;
  35:     double          dist;
  36:     double          time;
  37:     double          speed;
  38:     double          frac;
  39:     register int        percent;
  40:     register int        i;
  41:     extern double       move();
  42: 
  43:     if (Ship.cond == DOCKED)
  44:         return (printf("%s is docked\n", Ship.shipname));
  45:     if (damaged(WARP))
  46:     {
  47:         return (out(WARP));
  48:     }
  49:     if (fl < 0)
  50:     {
  51:         course = c;
  52:         dist = d;
  53:     }
  54:     else
  55:         if (getcodi(&course, &dist))
  56:             return;
  57: 
  58:     /* check to see that we are not using an absurd amount of power */
  59:     power = (dist + 0.05) * Ship.warp3;
  60:     percent = 100 * power / Ship.energy + 0.5;
  61:     if (percent >= 85)
  62:     {
  63:         printf("Scotty: That would consume %d%% of our remaining energy.\n",
  64:             percent);
  65:         if (!getynpar("Are you sure that is wise"))
  66:             return;
  67:     }
  68: 
  69:     /* compute the speed we will move at, and the time it will take */
  70:     speed = Ship.warp2 / Param.warptime;
  71:     time = dist / speed;
  72: 
  73:     /* check to see that that value is not ridiculous */
  74:     percent = 100 * time / Now.time + 0.5;
  75:     if (percent >= 85)
  76:     {
  77:         printf("Spock: That would take %d%% of our remaining time.\n",
  78:             percent);
  79:         if (!getynpar("Are you sure that is wise"))
  80:             return;
  81:     }
  82: 
  83:     /* compute how far we will go if we get damages */
  84:     if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0))
  85:     {
  86:         frac = franf();
  87:         dist *= frac;
  88:         time *= frac;
  89:         damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20);
  90:     }
  91: 
  92:     /* do the move */
  93:     Move.time = move(fl, course, time, speed);
  94: 
  95:     /* see how far we actually went, and decrement energy appropriately */
  96:     dist = Move.time * speed;
  97:     Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1);
  98: 
  99:     /* test for bizarre events */
 100:     if (Ship.warp <= 9.0)
 101:         return;
 102:     printf("\n\n  ___ Speed exceeding warp nine ___\n\n");
 103:     sleep(2);
 104:     printf("Ship's safety systems malfunction\n");
 105:     sleep(2);
 106:     printf("Crew experiencing extreme sensory distortion\n");
 107:     sleep(4);
 108:     if (ranf(100) >= 100 * dist)
 109:     {
 110:         return (printf("Equilibrium restored -- all systems normal\n"));
 111:     }
 112: 
 113:     /* select a bizzare thing to happen to us */
 114:     percent = ranf(100);
 115:     if (percent < 70)
 116:     {
 117:         /* time warp */
 118:         if (percent < 35 || !Game.snap)
 119:         {
 120:             /* positive time warp */
 121:             time = (Ship.warp - 8.0) * dist * (franf() + 1.0);
 122:             Now.date += time;
 123:             printf("Positive time portal entered -- it is now Stardate %.2f\n",
 124:                 Now.date);
 125:             for (i = 0; i < MAXEVENTS; i++)
 126:             {
 127:                 percent = Event[i].evcode;
 128:                 if (percent == E_FIXDV || percent == E_LRTB)
 129:                     Event[i].date += time;
 130:             }
 131:             return;
 132:         }
 133: 
 134:         /* s/he got lucky: a negative time portal */
 135:         time = Now.date;
 136:         i = (int) Etc.snapshot;
 137:         bmove(i, Quad, sizeof Quad);
 138:         bmove(i += sizeof Quad, Event, sizeof Event);
 139:         bmove(i += sizeof Event, &Now, sizeof Now);
 140:         printf("Negative time portal entered -- it is now Stardate %.2f\n",
 141:             Now.date);
 142:         for (i = 0; i < MAXEVENTS; i++)
 143:             if (Event[i].evcode == E_FIXDV)
 144:                 reschedule(&Event[i], Event[i].date - time);
 145:         return;
 146:     }
 147: 
 148:     /* test for just a lot of damage */
 149:     if (percent < 80)
 150:         lose(L_TOOFAST);
 151:     printf("Equilibrium restored -- extreme damage occured to ship systems\n");
 152:     for (i = 0; i < NDEV; i++)
 153:         damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]);
 154:     Ship.shldup = 0;
 155: }

Defined functions

Defined variables