/*-
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)warp.c 8.1 (Berkeley) 5/31/93
* $FreeBSD: src/games/trek/warp.c,v 1.4 1999/11/30 03:49:56 billf Exp $
* $DragonFly: src/games/trek/warp.c,v 1.4 2007/05/13 18:33:55 swildner Exp $
*/
#include "trek.h"
#include "getpar.h"
/*
** MOVE UNDER WARP POWER
**
** This is both the "move" and the "ram" commands, differing
** only in the flag 'fl'. It is also used for automatic
** emergency override mode, when 'fl' is < 0 and 'c' and 'd'
** are the course and distance to be moved. If 'fl' >= 0,
** the course and distance are asked of the captain.
**
** The guts of this routine are in the routine move(), which
** is shared with impulse(). Also, the working part of this
** routine is very small; the rest is to handle the slight chance
** that you may be moving at some riduculous speed. In that
** case, there is code to handle time warps, etc.
*/
/*
* dowarp() is used in a struct cvntab to call warp(). Since it is always ram
* or move, fl is never < 0, so ask the user for course and distance, then pass
* that to warp().
*/
void
dowarp(int fl)
{
int c;
double d;
if (getcodi(&c, &d))
return;
warp(fl, c, d);
}
void
warp(int fl, int c, double d)
{
int course;
double power;
double dist;
double p_time;
double speed;
double frac;
int percent;
int i;
char *s;
if (Ship.cond == DOCKED) {
printf("%s is docked\n", Ship.shipname);
return;
}
if (damaged(WARP)) {
out(WARP);
return;
}
course = c;
dist = d;
/* check to see that we are not using an absurd amount of power */
power = (dist + 0.05) * Ship.warp3;
percent = 100 * power / Ship.energy + 0.5;
if (percent >= 85) {
printf("Scotty: That would consume %d%% of our remaining energy.\n",
percent);
if (!getynpar("Are you sure that is wise"))
return;
}
/* compute the speed we will move at, and the time it will take */
speed = Ship.warp2 / Param.warptime;
p_time = dist / speed;
/* check to see that that value is not ridiculous */
percent = 100 * p_time / Now.time + 0.5;
if (percent >= 85) {
printf("Spock: That would take %d%% of our remaining time.\n",
percent);
if (!getynpar("Are you sure that is wise"))
return;
}
/* compute how far we will go if we get damages */
if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) {
frac = franf();
dist *= frac;
p_time *= frac;
damage(WARP, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20);
}
/* do the move */
Move.time = move(fl, course, p_time, speed);
/* see how far we actually went, and decrement energy appropriately */
dist = Move.time * speed;
Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1);
/* test for bizarre events */
if (Ship.warp <= 9.0)
return;
printf("\n\n ___ Speed exceeding warp nine ___\n\n");
sleep(2);
printf("Ship's safety systems malfunction\n");
sleep(2);
printf("Crew experiencing extreme sensory distortion\n");
sleep(4);
if (ranf(100) >= 100 * dist) {
printf("Equilibrium restored -- all systems normal\n");
return;
}
/* select a bizzare thing to happen to us */
percent = ranf(100);
if (percent < 70) {
/* time warp */
if (percent < 35 || !Game.snap) {
/* positive time warp */
p_time = (Ship.warp - 8.0) * dist * (franf() + 1.0);
Now.date += p_time;
printf("Positive time portal entered -- it is now Stardate %.2f\n",
Now.date);
for (i = 0; i < MAXEVENTS; i++) {
percent = Event[i].evcode;
if (percent == E_FIXDV || percent == E_LRTB)
Event[i].date += p_time;
}
return;
}
/* s/he got lucky: a negative time portal */
p_time = Now.date;
s = Etc.snapshot;
bmove(s, Quad, sizeof Quad);
bmove(s += sizeof Quad, Event, sizeof Event);
bmove(s += sizeof Event, &Now, sizeof Now);
printf("Negative time portal entered -- it is now Stardate %.2f\n",
Now.date);
for (i = 0; i < MAXEVENTS; i++)
if (Event[i].evcode == E_FIXDV)
reschedule(&Event[i], Event[i].date - p_time);
return;
}
/* test for just a lot of damage */
if (percent < 80)
lose(L_TOOFAST);
printf("Equilibrium restored -- extreme damage occurred to ship systems\n");
for (i = 0; i < NDEV; i++)
damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]);
Ship.shldup = 0;
}