mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-05 09:14:03 +00:00
412 lines
9.8 KiB
C
412 lines
9.8 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Ed James.
|
|
*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 1987 by Ed James, UC Berkeley. All rights reserved.
|
|
*
|
|
* Copy permission is hereby granted provided that this notice is
|
|
* retained on all partial or complete copies.
|
|
*
|
|
* For more info on this and all of my stuff, mail edjames@berkeley.edu.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)update.c 8.1 (Berkeley) 5/31/93";
|
|
#endif not lint
|
|
|
|
#include <string.h>
|
|
#include "include.h"
|
|
|
|
update()
|
|
{
|
|
int i, dir_diff, mask, unclean;
|
|
PLANE *pp, *p1, *p2, *p;
|
|
|
|
#ifdef BSD
|
|
mask = sigblock(sigmask(SIGINT));
|
|
#endif
|
|
#ifdef SYSV
|
|
alarm(0);
|
|
signal(SIGALRM, update);
|
|
#endif
|
|
|
|
clck++;
|
|
|
|
erase_all();
|
|
|
|
/* put some planes in the air */
|
|
do {
|
|
unclean = 0;
|
|
for (pp = ground.head; pp != NULL; pp = pp->next) {
|
|
if (pp->new_altitude > 0) {
|
|
delete(&ground, pp);
|
|
append(&air, pp);
|
|
unclean = 1;
|
|
break;
|
|
}
|
|
}
|
|
} while (unclean);
|
|
|
|
/* do altitude change and basic movement */
|
|
for (pp = air.head; pp != NULL; pp = pp->next) {
|
|
/* type 0 only move every other turn */
|
|
if (pp->plane_type == 0 && clck & 1)
|
|
continue;
|
|
|
|
pp->fuel--;
|
|
if (pp->fuel < 0)
|
|
loser(pp, "ran out of fuel.");
|
|
|
|
pp->altitude += SGN(pp->new_altitude - pp->altitude);
|
|
|
|
if (!pp->delayd) {
|
|
dir_diff = pp->new_dir - pp->dir;
|
|
/*
|
|
* Allow for circle commands
|
|
*/
|
|
if (pp->new_dir >= 0 && pp->new_dir < MAXDIR) {
|
|
if (dir_diff > MAXDIR/2)
|
|
dir_diff -= MAXDIR;
|
|
else if (dir_diff < -(MAXDIR/2))
|
|
dir_diff += MAXDIR;
|
|
}
|
|
if (dir_diff > 2)
|
|
dir_diff = 2;
|
|
else if (dir_diff < -2)
|
|
dir_diff = -2;
|
|
pp->dir += dir_diff;
|
|
if (pp->dir >= MAXDIR)
|
|
pp->dir -= MAXDIR;
|
|
else if (pp->dir < 0)
|
|
pp->dir += MAXDIR;
|
|
}
|
|
pp->xpos += displacement[pp->dir].dx;
|
|
pp->ypos += displacement[pp->dir].dy;
|
|
|
|
if (pp->delayd && pp->xpos == sp->beacon[pp->delayd_no].x &&
|
|
pp->ypos == sp->beacon[pp->delayd_no].y) {
|
|
pp->delayd = 0;
|
|
if (pp->status == S_UNMARKED)
|
|
pp->status = S_MARKED;
|
|
}
|
|
|
|
switch (pp->dest_type) {
|
|
case T_AIRPORT:
|
|
if (pp->xpos == sp->airport[pp->dest_no].x &&
|
|
pp->ypos == sp->airport[pp->dest_no].y &&
|
|
pp->altitude == 0) {
|
|
if (pp->dir != sp->airport[pp->dest_no].dir)
|
|
loser(pp, "landed in the wrong direction.");
|
|
else {
|
|
pp->status = S_GONE;
|
|
continue;
|
|
}
|
|
}
|
|
break;
|
|
case T_EXIT:
|
|
if (pp->xpos == sp->exit[pp->dest_no].x &&
|
|
pp->ypos == sp->exit[pp->dest_no].y) {
|
|
if (pp->altitude != 9)
|
|
loser(pp, "exited at the wrong altitude.");
|
|
else {
|
|
pp->status = S_GONE;
|
|
continue;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
loser(pp, "has a bizarre destination, get help!");
|
|
}
|
|
if (pp->altitude > 9)
|
|
/* "this is impossible" */
|
|
loser(pp, "exceded flight ceiling.");
|
|
if (pp->altitude <= 0) {
|
|
for (i = 0; i < sp->num_airports; i++)
|
|
if (pp->xpos == sp->airport[i].x &&
|
|
pp->ypos == sp->airport[i].y) {
|
|
if (pp->dest_type == T_AIRPORT)
|
|
loser(pp,
|
|
"landed at the wrong airport.");
|
|
else
|
|
loser(pp,
|
|
"landed instead of exited.");
|
|
}
|
|
loser(pp, "crashed on the ground.");
|
|
}
|
|
if (pp->xpos < 1 || pp->xpos >= sp->width - 1 ||
|
|
pp->ypos < 1 || pp->ypos >= sp->height - 1) {
|
|
for (i = 0; i < sp->num_exits; i++)
|
|
if (pp->xpos == sp->exit[i].x &&
|
|
pp->ypos == sp->exit[i].y) {
|
|
if (pp->dest_type == T_EXIT)
|
|
loser(pp,
|
|
"exited via the wrong exit.");
|
|
else
|
|
loser(pp,
|
|
"exited instead of landed.");
|
|
}
|
|
loser(pp, "illegally left the flight arena.");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Traverse the list once, deleting the planes that are gone.
|
|
*/
|
|
for (pp = air.head; pp != NULL; pp = p2) {
|
|
p2 = pp->next;
|
|
if (pp->status == S_GONE) {
|
|
safe_planes++;
|
|
delete(&air, pp);
|
|
}
|
|
}
|
|
|
|
draw_all();
|
|
|
|
for (p1 = air.head; p1 != NULL; p1 = p1->next)
|
|
for (p2 = p1->next; p2 != NULL; p2 = p2->next)
|
|
if (too_close(p1, p2, 1)) {
|
|
static char buf[80];
|
|
|
|
(void)sprintf(buf, "collided with plane '%c'.",
|
|
name(p2));
|
|
loser(p1, buf);
|
|
}
|
|
/*
|
|
* Check every other update. Actually, only add on even updates.
|
|
* Otherwise, prop jobs show up *on* entrance. Remember that
|
|
* we don't update props on odd updates.
|
|
*/
|
|
if ((random() % sp->newplane_time) == 0)
|
|
addplane();
|
|
|
|
#ifdef BSD
|
|
sigsetmask(mask);
|
|
#endif
|
|
#ifdef SYSV
|
|
alarm(sp->update_secs);
|
|
#endif
|
|
}
|
|
|
|
char *
|
|
command(pp)
|
|
PLANE *pp;
|
|
{
|
|
static char buf[50], *bp, *comm_start;
|
|
char *index();
|
|
|
|
buf[0] = '\0';
|
|
bp = buf;
|
|
(void)sprintf(bp, "%c%d%c%c%d: ", name(pp), pp->altitude,
|
|
(pp->fuel < LOWFUEL) ? '*' : ' ',
|
|
(pp->dest_type == T_AIRPORT) ? 'A' : 'E', pp->dest_no);
|
|
|
|
comm_start = bp = index(buf, '\0');
|
|
if (pp->altitude == 0)
|
|
(void)sprintf(bp, "Holding @ A%d", pp->orig_no);
|
|
else if (pp->new_dir >= MAXDIR || pp->new_dir < 0)
|
|
strcpy(bp, "Circle");
|
|
else if (pp->new_dir != pp->dir)
|
|
(void)sprintf(bp, "%d", dir_deg(pp->new_dir));
|
|
|
|
bp = index(buf, '\0');
|
|
if (pp->delayd)
|
|
(void)sprintf(bp, " @ B%d", pp->delayd_no);
|
|
|
|
bp = index(buf, '\0');
|
|
if (*comm_start == '\0' &&
|
|
(pp->status == S_UNMARKED || pp->status == S_IGNORED))
|
|
strcpy(bp, "---------");
|
|
return (buf);
|
|
}
|
|
|
|
/* char */
|
|
name(p)
|
|
PLANE *p;
|
|
{
|
|
if (p->plane_type == 0)
|
|
return ('A' + p->plane_no);
|
|
else
|
|
return ('a' + p->plane_no);
|
|
}
|
|
|
|
number(l)
|
|
{
|
|
if (l < 'a' && l > 'z' && l < 'A' && l > 'Z')
|
|
return (-1);
|
|
else if (l >= 'a' && l <= 'z')
|
|
return (l - 'a');
|
|
else
|
|
return (l - 'A');
|
|
}
|
|
|
|
next_plane()
|
|
{
|
|
static int last_plane = -1;
|
|
PLANE *pp;
|
|
int found, start_plane = last_plane;
|
|
|
|
do {
|
|
found = 0;
|
|
last_plane++;
|
|
if (last_plane >= 26)
|
|
last_plane = 0;
|
|
for (pp = air.head; pp != NULL; pp = pp->next)
|
|
if (pp->plane_no == last_plane) {
|
|
found++;
|
|
break;
|
|
}
|
|
if (!found)
|
|
for (pp = ground.head; pp != NULL; pp = pp->next)
|
|
if (pp->plane_no == last_plane) {
|
|
found++;
|
|
break;
|
|
}
|
|
} while (found && last_plane != start_plane);
|
|
if (last_plane == start_plane)
|
|
return (-1);
|
|
return (last_plane);
|
|
}
|
|
|
|
addplane()
|
|
{
|
|
PLANE p, *pp, *p1;
|
|
int i, num_starts, close, rnd, rnd2, pnum;
|
|
|
|
bzero(&p, sizeof (p));
|
|
|
|
p.status = S_MARKED;
|
|
p.plane_type = random() % 2;
|
|
|
|
num_starts = sp->num_exits + sp->num_airports;
|
|
rnd = random() % num_starts;
|
|
|
|
if (rnd < sp->num_exits) {
|
|
p.dest_type = T_EXIT;
|
|
p.dest_no = rnd;
|
|
} else {
|
|
p.dest_type = T_AIRPORT;
|
|
p.dest_no = rnd - sp->num_exits;
|
|
}
|
|
|
|
/* loop until we get a plane not near another */
|
|
for (i = 0; i < num_starts; i++) {
|
|
/* loop till we get a different start point */
|
|
while ((rnd2 = random() % num_starts) == rnd)
|
|
;
|
|
if (rnd2 < sp->num_exits) {
|
|
p.orig_type = T_EXIT;
|
|
p.orig_no = rnd2;
|
|
p.xpos = sp->exit[rnd2].x;
|
|
p.ypos = sp->exit[rnd2].y;
|
|
p.new_dir = p.dir = sp->exit[rnd2].dir;
|
|
p.altitude = p.new_altitude = 7;
|
|
close = 0;
|
|
for (p1 = air.head; p1 != NULL; p1 = p1->next)
|
|
if (too_close(p1, &p, 4)) {
|
|
close++;
|
|
break;
|
|
}
|
|
if (close)
|
|
continue;
|
|
} else {
|
|
p.orig_type = T_AIRPORT;
|
|
p.orig_no = rnd2 - sp->num_exits;
|
|
p.xpos = sp->airport[p.orig_no].x;
|
|
p.ypos = sp->airport[p.orig_no].y;
|
|
p.new_dir = p.dir = sp->airport[p.orig_no].dir;
|
|
p.altitude = p.new_altitude = 0;
|
|
}
|
|
p.fuel = sp->width + sp->height;
|
|
break;
|
|
}
|
|
if (i >= num_starts)
|
|
return (-1);
|
|
pnum = next_plane();
|
|
if (pnum < 0)
|
|
return (-1);
|
|
p.plane_no = pnum;
|
|
|
|
pp = newplane();
|
|
bcopy(&p, pp, sizeof (p));
|
|
|
|
if (pp->orig_type == T_AIRPORT)
|
|
append(&ground, pp);
|
|
else
|
|
append(&air, pp);
|
|
|
|
return (pp->dest_type);
|
|
}
|
|
|
|
PLANE *
|
|
findplane(n)
|
|
{
|
|
PLANE *pp;
|
|
|
|
for (pp = air.head; pp != NULL; pp = pp->next)
|
|
if (pp->plane_no == n)
|
|
return (pp);
|
|
for (pp = ground.head; pp != NULL; pp = pp->next)
|
|
if (pp->plane_no == n)
|
|
return (pp);
|
|
return (NULL);
|
|
}
|
|
|
|
too_close(p1, p2, dist)
|
|
PLANE *p1, *p2;
|
|
{
|
|
if (ABS(p1->altitude - p2->altitude) <= dist &&
|
|
ABS(p1->xpos - p2->xpos) <= dist && ABS(p1->ypos - p2->ypos) <= dist)
|
|
return (1);
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
dir_deg(d)
|
|
{
|
|
switch (d) {
|
|
case 0: return (0);
|
|
case 1: return (45);
|
|
case 2: return (90);
|
|
case 3: return (135);
|
|
case 4: return (180);
|
|
case 5: return (225);
|
|
case 6: return (270);
|
|
case 7: return (315);
|
|
default:
|
|
return (-1);
|
|
}
|
|
}
|