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 1.2 2003/06/17 04:25:25 dillon Exp $ 36 */ 37 38 # include "trek.h" 39 40 /* 41 ** MOVE UNDER WARP POWER 42 ** 43 ** This is both the "move" and the "ram" commands, differing 44 ** only in the flag 'fl'. It is also used for automatic 45 ** emergency override mode, when 'fl' is < 0 and 'c' and 'd' 46 ** are the course and distance to be moved. If 'fl' >= 0, 47 ** the course and distance are asked of the captain. 48 ** 49 ** The guts of this routine are in the routine move(), which 50 ** is shared with impulse(). Also, the working part of this 51 ** routine is very small; the rest is to handle the slight chance 52 ** that you may be moving at some riduculous speed. In that 53 ** case, there is code to handle time warps, etc. 54 */ 55 56 warp(fl, c, d) 57 int fl, c; 58 double d; 59 { 60 int course; 61 double power; 62 double dist; 63 double time; 64 double speed; 65 double frac; 66 int percent; 67 int i; 68 extern double move(); 69 70 if (Ship.cond == DOCKED) 71 return (printf("%s is docked\n", Ship.shipname)); 72 if (damaged(WARP)) 73 { 74 return (out(WARP)); 75 } 76 if (fl < 0) 77 { 78 course = c; 79 dist = d; 80 } 81 else 82 if (getcodi(&course, &dist)) 83 return; 84 85 /* check to see that we are not using an absurd amount of power */ 86 power = (dist + 0.05) * Ship.warp3; 87 percent = 100 * power / Ship.energy + 0.5; 88 if (percent >= 85) 89 { 90 printf("Scotty: That would consume %d%% of our remaining energy.\n", 91 percent); 92 if (!getynpar("Are you sure that is wise")) 93 return; 94 } 95 96 /* compute the speed we will move at, and the time it will take */ 97 speed = Ship.warp2 / Param.warptime; 98 time = dist / speed; 99 100 /* check to see that that value is not ridiculous */ 101 percent = 100 * time / Now.time + 0.5; 102 if (percent >= 85) 103 { 104 printf("Spock: That would take %d%% of our remaining time.\n", 105 percent); 106 if (!getynpar("Are you sure that is wise")) 107 return; 108 } 109 110 /* compute how far we will go if we get damages */ 111 if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) 112 { 113 frac = franf(); 114 dist *= frac; 115 time *= frac; 116 damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20); 117 } 118 119 /* do the move */ 120 Move.time = move(fl, course, time, speed); 121 122 /* see how far we actually went, and decrement energy appropriately */ 123 dist = Move.time * speed; 124 Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1); 125 126 /* test for bizarre events */ 127 if (Ship.warp <= 9.0) 128 return; 129 printf("\n\n ___ Speed exceeding warp nine ___\n\n"); 130 sleep(2); 131 printf("Ship's safety systems malfunction\n"); 132 sleep(2); 133 printf("Crew experiencing extreme sensory distortion\n"); 134 sleep(4); 135 if (ranf(100) >= 100 * dist) 136 { 137 return (printf("Equilibrium restored -- all systems normal\n")); 138 } 139 140 /* select a bizzare thing to happen to us */ 141 percent = ranf(100); 142 if (percent < 70) 143 { 144 /* time warp */ 145 if (percent < 35 || !Game.snap) 146 { 147 /* positive time warp */ 148 time = (Ship.warp - 8.0) * dist * (franf() + 1.0); 149 Now.date += time; 150 printf("Positive time portal entered -- it is now Stardate %.2f\n", 151 Now.date); 152 for (i = 0; i < MAXEVENTS; i++) 153 { 154 percent = Event[i].evcode; 155 if (percent == E_FIXDV || percent == E_LRTB) 156 Event[i].date += time; 157 } 158 return; 159 } 160 161 /* s/he got lucky: a negative time portal */ 162 time = Now.date; 163 i = (int) Etc.snapshot; 164 bmove(i, Quad, sizeof Quad); 165 bmove(i += sizeof Quad, Event, sizeof Event); 166 bmove(i += sizeof Event, &Now, sizeof Now); 167 printf("Negative time portal entered -- it is now Stardate %.2f\n", 168 Now.date); 169 for (i = 0; i < MAXEVENTS; i++) 170 if (Event[i].evcode == E_FIXDV) 171 reschedule(&Event[i], Event[i].date - time); 172 return; 173 } 174 175 /* test for just a lot of damage */ 176 if (percent < 80) 177 lose(L_TOOFAST); 178 printf("Equilibrium restored -- extreme damage occured to ship systems\n"); 179 for (i = 0; i < NDEV; i++) 180 damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]); 181 Ship.shldup = 0; 182 } 183