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 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)warp.c 8.1 (Berkeley) 5/31/93"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD: src/games/trek/warp.c,v 1.4 1999/11/30 03:49:56 billf Exp $"; 40 #endif /* not lint */ 41 42 # include "trek.h" 43 44 /* 45 ** MOVE UNDER WARP POWER 46 ** 47 ** This is both the "move" and the "ram" commands, differing 48 ** only in the flag 'fl'. It is also used for automatic 49 ** emergency override mode, when 'fl' is < 0 and 'c' and 'd' 50 ** are the course and distance to be moved. If 'fl' >= 0, 51 ** the course and distance are asked of the captain. 52 ** 53 ** The guts of this routine are in the routine move(), which 54 ** is shared with impulse(). Also, the working part of this 55 ** routine is very small; the rest is to handle the slight chance 56 ** that you may be moving at some riduculous speed. In that 57 ** case, there is code to handle time warps, etc. 58 */ 59 60 warp(fl, c, d) 61 int fl, c; 62 double d; 63 { 64 int course; 65 double power; 66 double dist; 67 double time; 68 double speed; 69 double frac; 70 int percent; 71 int i; 72 extern double move(); 73 74 if (Ship.cond == DOCKED) 75 return (printf("%s is docked\n", Ship.shipname)); 76 if (damaged(WARP)) 77 { 78 return (out(WARP)); 79 } 80 if (fl < 0) 81 { 82 course = c; 83 dist = d; 84 } 85 else 86 if (getcodi(&course, &dist)) 87 return; 88 89 /* check to see that we are not using an absurd amount of power */ 90 power = (dist + 0.05) * Ship.warp3; 91 percent = 100 * power / Ship.energy + 0.5; 92 if (percent >= 85) 93 { 94 printf("Scotty: That would consume %d%% of our remaining energy.\n", 95 percent); 96 if (!getynpar("Are you sure that is wise")) 97 return; 98 } 99 100 /* compute the speed we will move at, and the time it will take */ 101 speed = Ship.warp2 / Param.warptime; 102 time = dist / speed; 103 104 /* check to see that that value is not ridiculous */ 105 percent = 100 * time / Now.time + 0.5; 106 if (percent >= 85) 107 { 108 printf("Spock: That would take %d%% of our remaining time.\n", 109 percent); 110 if (!getynpar("Are you sure that is wise")) 111 return; 112 } 113 114 /* compute how far we will go if we get damages */ 115 if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) 116 { 117 frac = franf(); 118 dist *= frac; 119 time *= frac; 120 damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20); 121 } 122 123 /* do the move */ 124 Move.time = move(fl, course, time, speed); 125 126 /* see how far we actually went, and decrement energy appropriately */ 127 dist = Move.time * speed; 128 Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1); 129 130 /* test for bizarre events */ 131 if (Ship.warp <= 9.0) 132 return; 133 printf("\n\n ___ Speed exceeding warp nine ___\n\n"); 134 sleep(2); 135 printf("Ship's safety systems malfunction\n"); 136 sleep(2); 137 printf("Crew experiencing extreme sensory distortion\n"); 138 sleep(4); 139 if (ranf(100) >= 100 * dist) 140 { 141 return (printf("Equilibrium restored -- all systems normal\n")); 142 } 143 144 /* select a bizzare thing to happen to us */ 145 percent = ranf(100); 146 if (percent < 70) 147 { 148 /* time warp */ 149 if (percent < 35 || !Game.snap) 150 { 151 /* positive time warp */ 152 time = (Ship.warp - 8.0) * dist * (franf() + 1.0); 153 Now.date += time; 154 printf("Positive time portal entered -- it is now Stardate %.2f\n", 155 Now.date); 156 for (i = 0; i < MAXEVENTS; i++) 157 { 158 percent = Event[i].evcode; 159 if (percent == E_FIXDV || percent == E_LRTB) 160 Event[i].date += time; 161 } 162 return; 163 } 164 165 /* s/he got lucky: a negative time portal */ 166 time = Now.date; 167 i = (int) Etc.snapshot; 168 bmove(i, Quad, sizeof Quad); 169 bmove(i += sizeof Quad, Event, sizeof Event); 170 bmove(i += sizeof Event, &Now, sizeof Now); 171 printf("Negative time portal entered -- it is now Stardate %.2f\n", 172 Now.date); 173 for (i = 0; i < MAXEVENTS; i++) 174 if (Event[i].evcode == E_FIXDV) 175 reschedule(&Event[i], Event[i].date - time); 176 return; 177 } 178 179 /* test for just a lot of damage */ 180 if (percent < 80) 181 lose(L_TOOFAST); 182 printf("Equilibrium restored -- extreme damage occured to ship systems\n"); 183 for (i = 0; i < NDEV; i++) 184 damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]); 185 Ship.shldup = 0; 186 } 187