1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)warp.c 8.1 (Berkeley) 5/31/93 34 * $FreeBSD: src/games/trek/warp.c,v 1.4 1999/11/30 03:49:56 billf Exp $ 35 * $DragonFly: src/games/trek/warp.c,v 1.4 2007/05/13 18:33:55 swildner Exp $ 36 */ 37 38 # include "getpar.h" 39 # include "trek.h" 40 41 /* 42 ** MOVE UNDER WARP POWER 43 ** 44 ** This is both the "move" and the "ram" commands, differing 45 ** only in the flag 'fl'. It is also used for automatic 46 ** emergency override mode, when 'fl' is < 0 and 'c' and 'd' 47 ** are the course and distance to be moved. If 'fl' >= 0, 48 ** the course and distance are asked of the captain. 49 ** 50 ** The guts of this routine are in the routine move(), which 51 ** is shared with impulse(). Also, the working part of this 52 ** routine is very small; the rest is to handle the slight chance 53 ** that you may be moving at some riduculous speed. In that 54 ** case, there is code to handle time warps, etc. 55 */ 56 57 void 58 warp(int fl, int c, double d) 59 { 60 int course; 61 double power; 62 double dist; 63 double p_time; 64 double speed; 65 double frac; 66 int percent; 67 int i; 68 char *s; 69 70 if (Ship.cond == DOCKED) { 71 printf("%s is docked\n", Ship.shipname); 72 return; 73 } 74 if (damaged(WARP)) 75 { 76 out(WARP); 77 return; 78 } 79 course = c; 80 dist = d; 81 82 /* check to see that we are not using an absurd amount of power */ 83 power = (dist + 0.05) * Ship.warp3; 84 percent = 100 * power / Ship.energy + 0.5; 85 if (percent >= 85) 86 { 87 printf("Scotty: That would consume %d%% of our remaining energy.\n", 88 percent); 89 if (!getynpar("Are you sure that is wise")) 90 return; 91 } 92 93 /* compute the speed we will move at, and the time it will take */ 94 speed = Ship.warp2 / Param.warptime; 95 p_time = dist / speed; 96 97 /* check to see that that value is not ridiculous */ 98 percent = 100 * p_time / Now.time + 0.5; 99 if (percent >= 85) 100 { 101 printf("Spock: That would take %d%% of our remaining time.\n", 102 percent); 103 if (!getynpar("Are you sure that is wise")) 104 return; 105 } 106 107 /* compute how far we will go if we get damages */ 108 if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) 109 { 110 frac = franf(); 111 dist *= frac; 112 p_time *= frac; 113 damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20); 114 } 115 116 /* do the move */ 117 Move.time = move(fl, course, p_time, speed); 118 119 /* see how far we actually went, and decrement energy appropriately */ 120 dist = Move.time * speed; 121 Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1); 122 123 /* test for bizarre events */ 124 if (Ship.warp <= 9.0) 125 return; 126 printf("\n\n ___ Speed exceeding warp nine ___\n\n"); 127 sleep(2); 128 printf("Ship's safety systems malfunction\n"); 129 sleep(2); 130 printf("Crew experiencing extreme sensory distortion\n"); 131 sleep(4); 132 if (ranf(100) >= 100 * dist) 133 { 134 printf("Equilibrium restored -- all systems normal\n"); 135 return; 136 } 137 138 /* select a bizzare thing to happen to us */ 139 percent = ranf(100); 140 if (percent < 70) 141 { 142 /* time warp */ 143 if (percent < 35 || !Game.snap) 144 { 145 /* positive time warp */ 146 p_time = (Ship.warp - 8.0) * dist * (franf() + 1.0); 147 Now.date += p_time; 148 printf("Positive time portal entered -- it is now Stardate %.2f\n", 149 Now.date); 150 for (i = 0; i < MAXEVENTS; i++) 151 { 152 percent = Event[i].evcode; 153 if (percent == E_FIXDV || percent == E_LRTB) 154 Event[i].date += p_time; 155 } 156 return; 157 } 158 159 /* s/he got lucky: a negative time portal */ 160 p_time = Now.date; 161 s = Etc.snapshot; 162 bmove(s, Quad, sizeof Quad); 163 bmove(s += sizeof Quad, Event, sizeof Event); 164 bmove(s += sizeof Event, &Now, sizeof Now); 165 printf("Negative time portal entered -- it is now Stardate %.2f\n", 166 Now.date); 167 for (i = 0; i < MAXEVENTS; i++) 168 if (Event[i].evcode == E_FIXDV) 169 reschedule(&Event[i], Event[i].date - p_time); 170 return; 171 } 172 173 /* test for just a lot of damage */ 174 if (percent < 80) 175 lose(L_TOOFAST); 176 printf("Equilibrium restored -- extreme damage occurred to ship systems\n"); 177 for (i = 0; i < NDEV; i++) 178 damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]); 179 Ship.shldup = 0; 180 } 181 182 /* 183 * dowarp() is used in a struct cvntab to call warp(). Since it is always ram 184 * or move, fl is never < 0, so ask the user for course and distance, then pass 185 * that to warp(). 186 */ 187 void 188 dowarp(int fl) 189 { 190 int c; 191 double d; 192 193 if(getcodi(&c, &d)) 194 return; 195 warp(fl, c, d); 196 } 197