263 lines
6.1 KiB
C
263 lines
6.1 KiB
C
/* $NetBSD: torped.c,v 1.8 2004/01/27 20:30:31 jsm 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[] = "@(#)torped.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: torped.c,v 1.8 2004/01/27 20:30:31 jsm 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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** PHOTON TORPEDO CONTROL
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**
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** Either one or three photon torpedoes are fired. If three
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** are fired, it is called a "burst" and you also specify
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** a spread angle.
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**
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** Torpedoes are never 100% accurate. There is always a random
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** cludge factor in their course which is increased if you have
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** your shields up. Hence, you will find that they are more
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** accurate at close range. However, they have the advantage that
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** at long range they don't lose any of their power as phasers
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** do, i.e., a hit is a hit is a hit, by any other name.
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**
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** When the course spreads too much, you get a misfire, and the
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** course is randomized even more. You also have the chance that
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** the misfire damages your torpedo tubes.
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*/
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static int randcourse(int);
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/*ARGSUSED*/
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void
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torped(v)
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int v __attribute__((__unused__));
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{
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int ix, iy;
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double x, y, dx, dy;
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double angle;
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int course, course2;
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int k;
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double bigger;
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double sectsize;
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int burst;
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int n;
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if (Ship.cloaked)
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{
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printf("Federation regulations do not permit attack while cloaked.\n");
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return;
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}
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if (check_out(TORPED))
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return;
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if (Ship.torped <= 0)
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{
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printf("All photon torpedos expended\n");
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return;
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}
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/* get the course */
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course = getintpar("Torpedo course");
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if (course < 0 || course > 360)
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return;
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burst = -1;
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/* need at least three torpedoes for a burst */
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if (Ship.torped < 3)
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{
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printf("No-burst mode selected\n");
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burst = 0;
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}
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else
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{
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/* see if the user wants one */
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if (!testnl())
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{
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k = ungetc(cgetc(0), stdin);
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if (k >= '0' && k <= '9')
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burst = 1;
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}
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}
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if (burst < 0)
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{
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burst = getynpar("Do you want a burst");
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}
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if (burst)
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{
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burst = getintpar("burst angle");
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if (burst <= 0)
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return;
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if (burst > 15) {
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printf("Maximum burst angle is 15 degrees\n");
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return;
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}
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}
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sectsize = NSECTS;
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n = -1;
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if (burst)
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{
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n = 1;
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course -= burst;
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}
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for (; n && n <= 3; n++)
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{
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/* select a nice random course */
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course2 = course + randcourse(n);
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angle = course2 * 0.0174532925; /* convert to radians */
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dx = -cos(angle);
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dy = sin(angle);
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bigger = fabs(dx);
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x = fabs(dy);
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if (x > bigger)
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bigger = x;
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dx /= bigger;
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dy /= bigger;
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x = Ship.sectx + 0.5;
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y = Ship.secty + 0.5;
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if (Ship.cond != DOCKED)
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Ship.torped -= 1;
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printf("Torpedo track");
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if (n > 0)
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printf(", torpedo number %d", n);
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printf(":\n%6.1f\t%4.1f\n", x, y);
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while (1)
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{
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ix = x += dx;
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iy = y += dy;
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if (x < 0.0 || x >= sectsize || y < 0.0 || y >= sectsize)
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{
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printf("Torpedo missed\n");
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break;
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}
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printf("%6.1f\t%4.1f\n", x, y);
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switch (Sect[ix][iy])
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{
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case EMPTY:
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continue;
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case HOLE:
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printf("Torpedo disappears into a black hole\n");
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break;
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case KLINGON:
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for (k = 0; k < Etc.nkling; k++)
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{
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if (Etc.klingon[k].x != ix || Etc.klingon[k].y != iy)
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continue;
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Etc.klingon[k].power -= 500 + ranf(501);
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if (Etc.klingon[k].power > 0)
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{
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printf("*** Hit on Klingon at %d,%d: extensive damages\n",
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ix, iy);
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break;
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}
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killk(ix, iy);
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break;
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}
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break;
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case STAR:
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nova(ix, iy);
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break;
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case INHABIT:
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kills(ix, iy, -1);
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break;
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case BASE:
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killb(Ship.quadx, Ship.quady);
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Game.killb += 1;
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break;
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default:
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printf("Unknown object %c at %d,%d destroyed\n",
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Sect[ix][iy], ix, iy);
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Sect[ix][iy] = EMPTY;
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break;
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}
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break;
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}
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if (damaged(TORPED) || Quad[Ship.quadx][Ship.quady].stars < 0)
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break;
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course += burst;
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}
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Move.free = 0;
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}
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/*
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** RANDOMIZE COURSE
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**
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** This routine randomizes the course for torpedo number 'n'.
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** Other things handled by this routine are misfires, damages
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** to the tubes, etc.
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*/
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static int
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randcourse(n)
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int n;
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{
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double r;
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int d;
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d = ((franf() + franf()) - 1.0) * 20;
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if (abs(d) > 12)
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{
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printf("Photon tubes misfire");
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if (n < 0)
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printf("\n");
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else
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printf(" on torpedo %d\n", n);
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if (ranf(2))
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{
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damage(TORPED, 0.2 * abs(d) * (franf() + 1.0));
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}
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d *= 1.0 + 2.0 * franf();
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}
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if (Ship.shldup || Ship.cond == DOCKED)
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{
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r = Ship.shield;
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r = 1.0 + r / Param.shield;
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if (Ship.cond == DOCKED)
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r = 2.0;
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d *= r;
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}
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return (d);
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}
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