345 lines
9.0 KiB
C
345 lines
9.0 KiB
C
/* $NetBSD: computer.c,v 1.16 2009/08/12 08:54:54 dholland Exp $ */
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/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)computer.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: computer.c,v 1.16 2009/08/12 08:54:54 dholland Exp $");
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#endif
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#endif /* not lint */
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "trek.h"
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#include "getpar.h"
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/*
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** On-Board Computer
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**
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** A computer request is fetched from the captain. The requests
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** are:
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**
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** chart -- print a star chart of the known galaxy. This includes
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** every quadrant that has ever had a long range or
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** a short range scan done of it, plus the location of
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** all starbases. This is of course updated by any sub-
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** space radio broadcasts (unless the radio is out).
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** The format is the same as that of a long range scan
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** except that ".1." indicates that a starbase exists
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** but we know nothing else.
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**
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** trajectory -- gives the course and distance to every know
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** Klingon in the quadrant. Obviously this fails if the
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** short range scanners are out.
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**
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** course -- gives a course computation from whereever you are
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** to any specified location. If the course begins
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** with a slash, the current quadrant is taken.
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** Otherwise the input is quadrant and sector coordi-
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** nates of the target sector.
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**
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** move -- identical to course, except that the move is performed.
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**
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** score -- prints out the current score.
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**
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** pheff -- "PHaser EFFectiveness" at a given distance. Tells
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** you how much stuff you need to make it work.
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**
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** warpcost -- Gives you the cost in time and units to move for
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** a given distance under a given warp speed.
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**
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** impcost -- Same for the impulse engines.
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**
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** distresslist -- Gives a list of the currently known starsystems
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** or starbases which are distressed, together with their
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** quadrant coordinates.
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**
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** If a command is terminated with a semicolon, you remain in
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** the computer; otherwise, you escape immediately to the main
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** command processor.
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*/
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static struct cvntab Cputab[] = {
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{ "ch", "art", (cmdfun)1, 0 },
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{ "t", "rajectory", (cmdfun)2, 0 },
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{ "c", "ourse", (cmdfun)3, 0 },
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{ "m", "ove", (cmdfun)3, 1 },
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{ "s", "core", (cmdfun)4, 0 },
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{ "p", "heff", (cmdfun)5, 0 },
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{ "w", "arpcost", (cmdfun)6, 0 },
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{ "i", "mpcost", (cmdfun)7, 0 },
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{ "d", "istresslist", (cmdfun)8, 0 },
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{ NULL, NULL, NULL, 0 }
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};
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static int kalc(int, int, int, int, double *);
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static void prkalc(int, double);
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/*ARGSUSED*/
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void
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computer(int v __unused)
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{
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int ix, iy;
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int i, j;
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int tqx, tqy;
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const struct cvntab *r;
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int cost;
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int course;
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double dist, time;
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double warpfact;
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struct quad *q;
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struct event *e;
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if (check_out(COMPUTER))
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return;
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while (1) {
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r = getcodpar("\nRequest", Cputab);
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switch ((long)r->value) {
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case 1: /* star chart */
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printf("Computer record of galaxy for all long range "
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"sensor scans\n\n");
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printf(" ");
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/* print top header */
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for (i = 0; i < NQUADS; i++)
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printf("-%d- ", i);
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printf("\n");
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for (i = 0; i < NQUADS; i++) {
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printf("%d ", i);
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for (j = 0; j < NQUADS; j++) {
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if (i == Ship.quadx &&
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j == Ship.quady) {
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printf("$$$ ");
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continue;
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}
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q = &Quad[i][j];
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/* 1000 or 1001 is special case */
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if (q->scanned >= 1000)
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if (q->scanned > 1000)
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printf(".1. ");
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else
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printf("/// ");
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else
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if (q->scanned < 0)
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printf("... ");
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else
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printf("%3d ",
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q->scanned);
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}
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printf("%d\n", i);
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}
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printf(" ");
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/* print bottom footer */
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for (i = 0; i < NQUADS; i++)
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printf("-%d- ", i);
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printf("\n");
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break;
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case 2: /* trajectory */
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if (check_out(SRSCAN)) {
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break;
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}
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if (Etc.nkling <= 0) {
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printf("No Klingons in this quadrant\n");
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break;
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}
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/* for each Klingon, give the course & distance */
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for (i = 0; i < Etc.nkling; i++) {
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printf("Klingon at %d,%d",
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Etc.klingon[i].x, Etc.klingon[i].y);
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course = kalc(Ship.quadx, Ship.quady,
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Etc.klingon[i].x,
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Etc.klingon[i].y, &dist);
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prkalc(course, dist);
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}
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break;
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case 3: /* course calculation */
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if (readdelim('/')) {
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tqx = Ship.quadx;
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tqy = Ship.quady;
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} else {
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ix = getintpar("Quadrant");
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if (ix < 0 || ix >= NSECTS)
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break;
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iy = getintpar("q-y");
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if (iy < 0 || iy >= NSECTS)
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break;
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tqx = ix;
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tqy = iy;
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}
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ix = getintpar("Sector");
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if (ix < 0 || ix >= NSECTS)
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break;
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iy = getintpar("s-y");
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if (iy < 0 || iy >= NSECTS)
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break;
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course = kalc(tqx, tqy, ix, iy, &dist);
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if (r->value2) {
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warp(-1, course, dist);
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break;
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}
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printf("%d,%d/%d,%d to %d,%d/%d,%d",
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Ship.quadx, Ship.quady, Ship.sectx, Ship.secty,
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tqx, tqy, ix, iy);
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prkalc(course, dist);
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break;
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case 4: /* score */
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score();
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break;
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case 5: /* phaser effectiveness */
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dist = getfltpar("range");
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if (dist < 0.0)
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break;
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dist *= 10.0;
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cost = pow(0.90, dist) * 98.0 + 0.5;
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printf("Phasers are %d%% effective at that range\n",
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cost);
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break;
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case 6: /* warp cost (time/energy) */
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dist = getfltpar("distance");
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if (dist < 0.0)
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break;
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warpfact = getfltpar("warp factor");
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if (warpfact <= 0.0)
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warpfact = Ship.warp;
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cost = (dist + 0.05) * warpfact * warpfact * warpfact;
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time = Param.warptime * dist / (warpfact * warpfact);
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printf("Warp %.2f distance %.2f cost %.2f "
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"stardates %d (%d w/ shlds up) units\n",
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warpfact, dist, time, cost, cost + cost);
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break;
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case 7: /* impulse cost */
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dist = getfltpar("distance");
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if (dist < 0.0)
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break;
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cost = 20 + 100 * dist;
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time = dist / 0.095;
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printf("Distance %.2f cost %.2f stardates %d units\n",
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dist, time, cost);
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break;
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case 8: /* distresslist */
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j = 1;
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printf("\n");
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/* scan the event list */
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for (i = 0; i < MAXEVENTS; i++) {
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e = &Event[i];
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/* ignore hidden entries */
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if (e->evcode & E_HIDDEN)
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continue;
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switch (e->evcode & E_EVENT) {
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case E_KDESB:
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printf("Klingon is attacking starbase "
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"in quadrant %d,%d\n",
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e->x, e->y);
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j = 0;
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break;
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case E_ENSLV:
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case E_REPRO:
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printf("Starsystem %s in quadrant "
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"%d,%d is distressed\n",
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Systemname[e->systemname],
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e->x, e->y);
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j = 0;
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break;
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}
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}
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if (j)
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printf("No known distress calls are active\n");
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break;
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}
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/*
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* Skip to next semicolon or newline. Semicolon
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* means get new computer request; newline means
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* exit computer mode.
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*/
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while ((i = getchar()) != ';') {
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if (i == EOF)
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exit(1);
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if (i == '\n') {
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ungetc(i, stdin);
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return;
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}
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}
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}
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}
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/*
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** Course Calculation
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**
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** Computes and outputs the course and distance from position
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** sqx,sqy/ssx,ssy to tqx,tqy/tsx,tsy.
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*/
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static int
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kalc(int tqx, int tqy, int tsx, int tsy, double *dist)
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{
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double dx, dy;
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double quadsize;
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double angle;
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int course;
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/* normalize to quadrant distances */
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quadsize = NSECTS;
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dx = (Ship.quadx + Ship.sectx / quadsize) - (tqx + tsx / quadsize);
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dy = (tqy + tsy / quadsize) - (Ship.quady + Ship.secty / quadsize);
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/* get the angle */
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angle = atan2(dy, dx);
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/* make it 0 -> 2 pi */
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if (angle < 0.0)
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angle += 6.283185307;
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/* convert from radians to degrees */
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course = angle * 57.29577951 + 0.5;
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dx = dx * dx + dy * dy;
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*dist = sqrt(dx);
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return (course);
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}
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static void
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prkalc(int course, double dist)
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{
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printf(": course %d dist %.3f\n", course, dist);
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}
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