1 /* $NetBSD: warp.c,v 1.7 2001/04/25 02:33:10 simonb 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)warp.c 8.1 (Berkeley) 5/31/93"; 40 #else 41 __RCSID("$NetBSD: warp.c,v 1.7 2001/04/25 02:33:10 simonb Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <stdio.h> 46 #include <math.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include "trek.h" 50 #include "getpar.h" 51 52 /* 53 ** MOVE UNDER WARP POWER 54 ** 55 ** This is both the "move" and the "ram" commands, differing 56 ** only in the flag 'fl'. It is also used for automatic 57 ** emergency override mode, when 'fl' is < 0 and 'c' and 'd' 58 ** are the course and distance to be moved. If 'fl' >= 0, 59 ** the course and distance are asked of the captain. 60 ** 61 ** The guts of this routine are in the routine move(), which 62 ** is shared with impulse(). Also, the working part of this 63 ** routine is very small; the rest is to handle the slight chance 64 ** that you may be moving at some riduculous speed. In that 65 ** case, there is code to handle time warps, etc. 66 */ 67 68 void 69 dowarp(fl) 70 int fl; 71 { 72 int c; 73 double d; 74 75 if (getcodi(&c, &d)) 76 return; 77 warp(fl, c, d); 78 } 79 80 void 81 warp(fl, c, d) 82 int fl, c; 83 double d; 84 { 85 char *p; 86 int course; 87 double power; 88 double dist; 89 double time; 90 double speed; 91 double frac; 92 int percent; 93 int i; 94 95 if (Ship.cond == DOCKED) { 96 printf("%s is docked\n", Ship.shipname); 97 return; 98 } 99 if (damaged(WARP)) 100 { 101 out(WARP); 102 return; 103 } 104 105 course = c; 106 dist = d; 107 108 /* check to see that we are not using an absurd amount of power */ 109 power = (dist + 0.05) * Ship.warp3; 110 percent = 100 * power / Ship.energy + 0.5; 111 if (percent >= 85) 112 { 113 printf("Scotty: That would consume %d%% of our remaining energy.\n", 114 percent); 115 if (!getynpar("Are you sure that is wise")) 116 return; 117 } 118 119 /* compute the speed we will move at, and the time it will take */ 120 speed = Ship.warp2 / Param.warptime; 121 time = dist / speed; 122 123 /* check to see that that value is not ridiculous */ 124 percent = 100 * time / Now.time + 0.5; 125 if (percent >= 85) 126 { 127 printf("Spock: That would take %d%% of our remaining time.\n", 128 percent); 129 if (!getynpar("Are you sure that is wise")) 130 return; 131 } 132 133 /* compute how far we will go if we get damages */ 134 if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) 135 { 136 frac = franf(); 137 dist *= frac; 138 time *= frac; 139 damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20); 140 } 141 142 /* do the move */ 143 Move.time = move(fl, course, time, speed); 144 145 /* see how far we actually went, and decrement energy appropriately */ 146 dist = Move.time * speed; 147 Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1); 148 149 /* test for bizarre events */ 150 if (Ship.warp <= 9.0) 151 return; 152 printf("\n\n ___ Speed exceeding warp nine ___\n\n"); 153 sleep(2); 154 printf("Ship's safety systems malfunction\n"); 155 sleep(2); 156 printf("Crew experiencing extreme sensory distortion\n"); 157 sleep(4); 158 if (ranf(100) >= 100 * dist) 159 { 160 printf("Equilibrium restored -- all systems normal\n"); 161 return; 162 } 163 164 /* select a bizzare thing to happen to us */ 165 percent = ranf(100); 166 if (percent < 70) 167 { 168 /* time warp */ 169 if (percent < 35 || !Game.snap) 170 { 171 /* positive time warp */ 172 time = (Ship.warp - 8.0) * dist * (franf() + 1.0); 173 Now.date += time; 174 printf("Positive time portal entered -- it is now Stardate %.2f\n", 175 Now.date); 176 for (i = 0; i < MAXEVENTS; i++) 177 { 178 percent = Event[i].evcode; 179 if (percent == E_FIXDV || percent == E_LRTB) 180 Event[i].date += time; 181 } 182 return; 183 } 184 185 /* s/he got lucky: a negative time portal */ 186 time = Now.date; 187 p = (char *) Etc.snapshot; 188 memcpy(p, Quad, sizeof Quad); 189 p += sizeof Quad; 190 memcpy(p, Event, sizeof Event); 191 p += sizeof Event; 192 memcpy(p, &Now, sizeof Now); 193 printf("Negative time portal entered -- it is now Stardate %.2f\n", 194 Now.date); 195 for (i = 0; i < MAXEVENTS; i++) 196 if (Event[i].evcode == E_FIXDV) 197 reschedule(&Event[i], Event[i].date - time); 198 return; 199 } 200 201 /* test for just a lot of damage */ 202 if (percent < 80) 203 lose(L_TOOFAST); 204 printf("Equilibrium restored -- extreme damage occurred to ship systems\n"); 205 for (i = 0; i < NDEV; i++) 206 damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]); 207 Ship.shldup = 0; 208 } 209