363 lines
8.5 KiB
C
363 lines
8.5 KiB
C
/* $NetBSD: dr_3.c,v 1.13 2001/01/04 06:16:51 jwise Exp $ */
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/*
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* Copyright (c) 1983, 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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[] = "@(#)dr_3.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: dr_3.c,v 1.13 2001/01/04 06:16:51 jwise Exp $");
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#endif
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#endif /* not lint */
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#include <stdlib.h>
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#include <string.h>
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#include "extern.h"
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#include "driver.h"
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void moveall(void);
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static int stillmoving(int);
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static int is_isolated(struct ship *);
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static int push(struct ship *, struct ship *);
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static void step(struct ship *, int, char *);
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void sendbp(struct ship *, struct ship *, int, int);
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int is_toughmelee(struct ship *, struct ship *, int, int);
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void reload(void);
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void checksails(void);
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/* move all comp ships */
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void
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moveall(void)
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{
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struct ship *sp, *sq;
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int n;
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int k, l;
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int row[NSHIP], col[NSHIP], dir[NSHIP], drift[NSHIP];
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char moved[NSHIP];
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/*
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* first try to create moves for OUR ships
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*/
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foreachship(sp) {
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struct ship *closest;
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int ma, ta;
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char af;
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if (sp->file->captain[0] || sp->file->dir == 0)
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continue;
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if (!sp->file->struck && windspeed && !snagged(sp)
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&& sp->specs->crew3) {
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ta = maxturns(sp, &af);
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ma = maxmove(sp, sp->file->dir, 0);
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closest = closestenemy(sp, 0, 0);
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if (closest == 0)
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*sp->file->movebuf = '\0';
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else
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closeon(sp, closest, sp->file->movebuf,
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ta, ma, af);
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} else
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*sp->file->movebuf = '\0';
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}
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/*
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* Then execute the moves for ALL ships (dead ones too),
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* checking for collisions and snags at each step.
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* The old positions are saved in row[], col[], dir[].
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* At the end, we compare and write out the changes.
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*/
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n = 0;
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foreachship(sp) {
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if (snagged(sp))
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strcpy(sp->file->movebuf, "d");
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else
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if (*sp->file->movebuf != 'd')
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strcat(sp->file->movebuf, "d");
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row[n] = sp->file->row;
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col[n] = sp->file->col;
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dir[n] = sp->file->dir;
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drift[n] = sp->file->drift;
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moved[n] = 0;
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n++;
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}
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/*
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* Now resolve collisions.
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* This is the tough part.
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*/
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for (k = 0; stillmoving(k); k++) {
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/*
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* Step once.
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* And propagate the nulls at the end of sp->file->movebuf.
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*/
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n = 0;
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foreachship(sp) {
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if (!sp->file->movebuf[k])
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sp->file->movebuf[k+1] = '\0';
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else if (sp->file->dir)
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step(sp, sp->file->movebuf[k], &moved[n]);
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n++;
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}
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/*
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* The real stuff.
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*/
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n = 0;
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foreachship(sp) {
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if (sp->file->dir == 0 || is_isolated(sp))
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goto cont1;
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l = 0;
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foreachship(sq) {
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char snap = 0;
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if (sp == sq)
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goto cont2;
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if (sq->file->dir == 0)
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goto cont2;
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if (!push(sp, sq))
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goto cont2;
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if (snagged2(sp, sq) && range(sp, sq) > 1)
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snap++;
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if (!range(sp, sq) && !fouled2(sp, sq)) {
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makesignal(sp, "collision with $$", sq);
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if (dieroll() < 4) {
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makesignal(sp, "fouled with $$",
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sq);
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Write(W_FOUL, sp, l, 0, 0, 0);
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Write(W_FOUL, sq, n, 0, 0, 0);
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}
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snap++;
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}
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if (snap) {
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sp->file->movebuf[k + 1] = 0;
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sq->file->movebuf[k + 1] = 0;
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sq->file->row = sp->file->row - 1;
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if (sp->file->dir == 1
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|| sp->file->dir == 5)
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sq->file->col =
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sp->file->col - 1;
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else
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sq->file->col = sp->file->col;
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sq->file->dir = sp->file->dir;
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}
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cont2:
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l++;
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}
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cont1:
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n++;
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}
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}
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/*
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* Clear old moves. And write out new pos.
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*/
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n = 0;
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foreachship(sp) {
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if (sp->file->dir != 0) {
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*sp->file->movebuf = 0;
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if (row[n] != sp->file->row)
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Write(W_ROW, sp, sp->file->row, 0, 0, 0);
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if (col[n] != sp->file->col)
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Write(W_COL, sp, sp->file->col, 0, 0, 0);
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if (dir[n] != sp->file->dir)
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Write(W_DIR, sp, sp->file->dir, 0, 0, 0);
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if (drift[n] != sp->file->drift)
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Write(W_DRIFT, sp, sp->file->drift, 0, 0, 0);
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}
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n++;
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}
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}
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static int
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stillmoving(int k)
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{
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struct ship *sp;
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foreachship(sp)
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if (sp->file->movebuf[k])
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return 1;
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return 0;
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}
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static int
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is_isolated(struct ship *ship)
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{
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struct ship *sp;
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foreachship(sp) {
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if (ship != sp && range(ship, sp) <= 10)
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return 0;
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}
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return 1;
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}
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static int
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push(struct ship *from, struct ship *to)
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{
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int bs, sb;
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sb = to->specs->guns;
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bs = from->specs->guns;
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if (sb > bs)
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return 1;
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if (sb < bs)
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return 0;
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return from < to;
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}
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static void
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step(struct ship *sp, int com, char *moved)
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{
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int dist;
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switch (com) {
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case 'r':
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if (++sp->file->dir == 9)
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sp->file->dir = 1;
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break;
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case 'l':
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if (--sp->file->dir == 0)
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sp->file->dir = 8;
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break;
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case '0': case '1': case '2': case '3':
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case '4': case '5': case '6': case '7':
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if (sp->file->dir % 2 == 0)
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dist = dtab[com - '0'];
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else
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dist = com - '0';
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sp->file->row -= dr[sp->file->dir] * dist;
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sp->file->col -= dc[sp->file->dir] * dist;
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*moved = 1;
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break;
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case 'b':
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break;
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case 'd':
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if (!*moved) {
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if (windspeed != 0 && ++sp->file->drift > 2 &&
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((sp->specs->class >= 3 && !snagged(sp))
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|| (turn & 1) == 0)) {
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sp->file->row -= dr[winddir];
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sp->file->col -= dc[winddir];
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}
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} else
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sp->file->drift = 0;
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break;
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}
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}
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void
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sendbp(struct ship *from, struct ship *to, int sections, int isdefense)
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{
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int n;
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struct BP *bp;
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bp = isdefense ? from->file->DBP : from->file->OBP;
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for (n = 0; n < NBP && bp[n].turnsent; n++)
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;
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if (n < NBP && sections) {
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Write(isdefense ? W_DBP : W_OBP, from,
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n, turn, to->file->index, sections);
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if (isdefense)
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makemsg(from, "repelling boarders");
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else
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makesignal(from, "boarding the $$", to);
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}
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}
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int
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is_toughmelee(struct ship *ship, struct ship *to, int isdefense, int count)
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{
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struct BP *bp;
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int obp = 0;
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int n, OBP = 0, DBP = 0, dbp = 0;
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int qual;
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qual = ship->specs->qual;
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bp = isdefense ? ship->file->DBP : ship->file->OBP;
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for (n = 0; n < NBP; n++, bp++) {
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if (bp->turnsent && (to == bp->toship || isdefense)) {
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obp += bp->mensent / 100
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? ship->specs->crew1 * qual : 0;
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obp += (bp->mensent % 100)/10
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? ship->specs->crew2 * qual : 0;
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obp += bp->mensent % 10
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? ship->specs->crew3 * qual : 0;
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}
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}
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if (count || isdefense)
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return obp;
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OBP = is_toughmelee(to, ship, 0, count + 1);
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dbp = is_toughmelee(ship, to, 1, count + 1);
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DBP = is_toughmelee(to, ship, 1, count + 1);
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if (OBP > obp + 10 || OBP + DBP >= obp + dbp + 10)
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return 1;
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else
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return 0;
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}
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void
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reload(void)
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{
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struct ship *sp;
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foreachship(sp) {
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sp->file->loadwith = 0;
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}
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}
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void
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checksails(void)
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{
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struct ship *sp;
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int rig, full;
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struct ship *close;
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foreachship(sp) {
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if (sp->file->captain[0] != 0)
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continue;
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rig = sp->specs->rig1;
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if (windspeed == 6 || (windspeed == 5 && sp->specs->class > 4))
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rig = 0;
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if (rig && sp->specs->crew3) {
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close = closestenemy(sp, 0, 0);
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if (close != 0) {
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if (range(sp, close) > 9)
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full = 1;
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else
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full = 0;
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} else
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full = 0;
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} else
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full = 0;
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if ((sp->file->FS != 0) != full)
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Write(W_FS, sp, full, 0, 0, 0);
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}
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}
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