1 /* $NetBSD: warp.c,v 1.11 2009/05/24 22:55:03 dholland 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[] = "@(#)warp.c 8.1 (Berkeley) 5/31/93"; 36 #else 37 __RCSID("$NetBSD: warp.c,v 1.11 2009/05/24 22:55:03 dholland Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdio.h> 42 #include <math.h> 43 #include <string.h> 44 #include <unistd.h> 45 #include "trek.h" 46 #include "getpar.h" 47 48 /* 49 ** MOVE UNDER WARP POWER 50 ** 51 ** This is both the "move" and the "ram" commands, differing 52 ** only in the flag 'fl'. It is also used for automatic 53 ** emergency override mode, when 'fl' is < 0 and 'c' and 'd' 54 ** are the course and distance to be moved. If 'fl' >= 0, 55 ** the course and distance are asked of the captain. 56 ** 57 ** The guts of this routine are in the routine move(), which 58 ** is shared with impulse(). Also, the working part of this 59 ** routine is very small; the rest is to handle the slight chance 60 ** that you may be moving at some riduculous speed. In that 61 ** case, there is code to handle time warps, etc. 62 */ 63 64 void 65 dowarp(int fl) 66 { 67 int c; 68 double d; 69 70 if (getcodi(&c, &d)) 71 return; 72 warp(fl, c, d); 73 } 74 75 void 76 warp(int fl, int c, double d) 77 { 78 char *p; 79 int course; 80 double power; 81 double dist; 82 double time; 83 double speed; 84 double frac; 85 int percent; 86 int i; 87 double repairs; 88 89 if (Ship.cond == DOCKED) { 90 printf("%s is docked\n", Ship.shipname); 91 return; 92 } 93 if (damaged(WARP)) { 94 out(WARP); 95 return; 96 } 97 98 course = c; 99 dist = d; 100 101 /* check to see that we are not using an absurd amount of power */ 102 power = (dist + 0.05) * Ship.warp3; 103 percent = 100 * power / Ship.energy + 0.5; 104 if (percent >= 85) { 105 printf("Scotty: That would consume %d%% of our remaining " 106 "energy.\n", 107 percent); 108 if (!getynpar("Are you sure that is wise")) 109 return; 110 } 111 112 /* compute the speed we will move at, and the time it will take */ 113 speed = Ship.warp2 / Param.warptime; 114 time = dist / speed; 115 116 /* check to see that that value is not ridiculous */ 117 percent = 100 * time / Now.time + 0.5; 118 if (percent >= 85) { 119 printf("Spock: That would take %d%% of our remaining time.\n", 120 percent); 121 if (!getynpar("Are you sure that is wise")) 122 return; 123 } 124 125 /* compute how far we will go if we get damages */ 126 if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) { 127 frac = franf(); 128 dist *= frac; 129 time *= frac; 130 repairs = (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20; 131 damage(WARP, repairs); 132 } 133 134 /* do the move */ 135 Move.time = move(fl, course, time, speed); 136 137 /* see how far we actually went, and decrement energy appropriately */ 138 dist = Move.time * speed; 139 Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1); 140 141 /* test for bizarre events */ 142 if (Ship.warp <= 9.0) 143 return; 144 printf("\n\n ___ Speed exceeding warp nine ___\n\n"); 145 sleep(2); 146 printf("Ship's safety systems malfunction\n"); 147 sleep(2); 148 printf("Crew experiencing extreme sensory distortion\n"); 149 sleep(4); 150 if (ranf(100) >= 100 * dist) { 151 printf("Equilibrium restored -- all systems normal\n"); 152 return; 153 } 154 155 /* select a bizzare thing to happen to us */ 156 percent = ranf(100); 157 if (percent < 70) { 158 /* time warp */ 159 if (percent < 35 || !Game.snap) { 160 /* positive time warp */ 161 time = (Ship.warp - 8.0) * dist * (franf() + 1.0); 162 Now.date += time; 163 printf("Positive time portal entered -- " 164 "it is now Stardate %.2f\n", 165 Now.date); 166 for (i = 0; i < MAXEVENTS; i++) { 167 percent = Event[i].evcode; 168 if (percent == E_FIXDV || percent == E_LRTB) 169 Event[i].date += time; 170 } 171 return; 172 } 173 174 /* s/he got lucky: a negative time portal */ 175 time = Now.date; 176 p = (char *) Etc.snapshot; 177 memcpy(p, Quad, sizeof Quad); 178 p += sizeof Quad; 179 memcpy(p, Event, sizeof Event); 180 p += sizeof Event; 181 memcpy(p, &Now, sizeof Now); 182 printf("Negative time portal entered -- " 183 "it is now Stardate %.2f\n", 184 Now.date); 185 for (i = 0; i < MAXEVENTS; i++) 186 if (Event[i].evcode == E_FIXDV) 187 reschedule(&Event[i], Event[i].date - time); 188 return; 189 } 190 191 /* test for just a lot of damage */ 192 if (percent < 80) 193 lose(L_TOOFAST); 194 printf("Equilibrium restored -- " 195 "extreme damage occurred to ship systems\n"); 196 for (i = 0; i < NDEV; i++) 197 damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]); 198 Ship.shldup = 0; 199 } 200